JP2007334851A - Program for optical environment analysis and optical environment analyzer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a program for optical environment analysis at high speed and which does not reduce accuracy. <P>SOLUTION: An internal space constituted of shape data of a building is divided into a unit cube or unit rectangular parallelpiped corresponding to a unit space, each face element of the unit cube or unit rectangular parallelpiped is classified into an opening face which is a face element corresponding to an opening of the shape data of the building and a face except the opening which is a face element corresponding to a part except the opening to execute processing by a light source face light quantity value setting part, processing for extracting face elements to be candidates for a reaching face where light may reach from a light source face by a virtual light beam vector setting part, processing for performing search processing by a light beam reach propriety setting part, processing for calculating a light quantity value of the reaching face by a reaching face light quantity value calculation part, processing for storing the light quantity value in face element data of the face element of the reaching face by a reaching face light quantity value storage part and processing for updating and storing the face element data of the face element by the reaching face light quantity value storage part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a light environment analysis program and a light environment analysis apparatus for simulating lighting conditions when analyzing an indoor light environment of a building.

  When using a house, whether the floor plan and opening settings are appropriate by quantitatively determining the distribution of brightness and illuminance inside the building using the surrounding environment as the light source It is hoped to know.

  In order to perform such an analysis, it is necessary to take into account the situation where light from the surrounding environment that is a light source enters the building through the opening and is reflected inside the building.

  A radiosity method is widely known and used as a calculation method considering such reflected light.

  In this method, the ceiling, wall, floor, etc. of a building are divided into many planes, and some of the planes serve as light sources, light rays are emitted from the light sources, and the emitted light rays constitute each building. The amount of light finally reaching each surface is obtained by repeatedly reaching the surface and then radiating while being reflected and attenuated.

  This calculation method is to divide the space under consideration into many planes, and to calculate the radiation and reflection aspects of the rays by emitting many rays from many surfaces to simulate the radiation of rays. It is a very huge and complicated calculation. In this calculation, the degree of arrival of light is calculated by obtaining the degree of arrival of the light emitted from the light source surface as the form factor from the distance, inclination, and size of the surface. It is an important requirement to obtain this relationship for all aspects mutually, and the calculation accuracy and calculation speed vary depending on the calculation format.

  For example, in Patent Document 1, when obtaining a form factor, an appropriate number of light rays are emitted from a surface serving as a light source, and the number of light rays that have reached a specific surface is calculated to obtain the shape factor for the surface. In addition, the calculation is simplified and speeded up by changing the number of light beams emitted from the light source surface in accordance with the amount of radiation.

Japanese Patent No. 2747386

  However, in the technique of the above-mentioned Patent Document 1, the number of rays emitted from the light source surface is not sufficient, and the calculation accuracy is sufficiently high unless the degree of emission of the emitted rays is sufficiently uniform. There is a risk that it cannot be secured. In particular, when the light amount of the light source is small, the number of light rays decreases, so that the calculation can be speeded up, but the calculated light amount value may not be appropriate.

  In addition, the opening part that serves as a light source such as a house has various shapes and sizes, and the interior space of the building is partitioned by room unit. The light beam emitted from the light source may be reflected several times on the ceiling, wall or floor, etc., which is the arrival surface of multiple light sources in the interior space of the building. Since it is necessary to reproduce the phenomenon of reaching the surface and calculate the light amount value close to the actual sense, it is a factor that increases the amount of calculation by the computer.

  The present invention solves the above-mentioned problems, and an object of the present invention is to provide an optical environment analysis program and an optical environment analysis apparatus that increase the calculation speed as much as possible and do not reduce the accuracy.

  The first configuration of the light environment analysis program according to the present invention for achieving the above object is based on the shape data of the building to be evaluated acquired by the building information acquisition unit, by the surface element data configuration unit, The interior space composed of the building shape data is divided into unit cubes or unit cuboids corresponding to the unit space, and each surface element of the unit cube or unit cuboid corresponds to the opening of the building shape data. And a first process of storing coordinates and attribute data in the surface element data by dividing the surface into an opening surface and a surface other than the opening that is a surface element corresponding to a part other than the opening. The light source surface light quantity value setting means recognizes the opening surface as a primary light source surface serving as a surface element of the light source, and is a surface element through which light can reach the surface other than the opening from the primary light source surface. First arrival The light source value that reaches the primary light source surface from the outside of the building is stored in the surface element data relating to the primary light source surface, and the primary light source surface by the virtual light vector setting means A unit cube corresponding to the unit space through which the ray vector set by the virtual ray vector setting unit passes by the third process of setting a ray vector for the primary arrival surface from the first ray and the ray reachability determination unit; Whether or not the ray vector intersects with other surface elements other than the primary light source surface and the primary arrival surface in the course of tracing the ray vector set by the virtual ray vector setting means with only a unit cuboid as a determination target And a fourth process for determining whether or not a light vector can reach the target primary arrival surface from the primary light source surface, When the light beam reachability determining means determines that the light vector set by the virtual light vector setting means is reachable from the primary light source surface to the target primary arrival surface, the primary arrival surface For the initial value of the primary light source surface, a light amount value obtained by multiplying the light amount value reaching the primary light source surface from the outside of the building set by the light source surface light amount value setting means and the aperture transmittance of the primary light source surface The amount of light reaching the primary arrival surface from the primary light source surface in consideration of the transmittance of the surface element other than the primary light source surface and the primary arrival surface where the ray vectors intersect as the radiant light amount value A value is calculated, and when the light beam reachability determining means determines that the light beam vector set by the virtual light beam vector setting means cannot reach the target primary arrival surface from the primary light source surface, Primary light From the source surface to the next candidate primary arrival surface, the third process by the virtual ray vector setting unit and the fourth process by the ray arrival possibility determination unit are sequentially performed to obtain the arrival surface light amount value. About the primary arrival surface determined by the calculation means that the ray vector set by the virtual ray vector setting means by the ray arrival possibility determination means can reach the target primary arrival surface from the primary light source surface. The primary light source surface and the primary arrival surface where the light ray vectors intersect with the light amount value given to the primary light source surface by the light source surface light amount value setting means as the initial radiation amount value of the primary arrival surface A fifth process of calculating a light amount value reaching the primary arrival surface from the primary light source surface in consideration of the transmittance of other surface elements other than the above, Calculated by processing The primary arrival surface is obtained by a sixth process of storing the light amount value reaching the primary arrival surface from the primary light source surface in the surface element data relating to the primary arrival surface and the arrival surface light amount value storage means. A light amount value given from the primary light source surface of the next candidate is added to the light amount value of the surface element data according to the above, and a seventh process of updating and storing the surface element data related to the primary arrival surface is executed It is characterized by doing.

  Here, building shape data refers to parts such as ceilings, walls, floors, etc. based on the floor plan of a building (house), household appliances such as refrigerators, furniture and other equipment, joinery elements and opening elements. . The internal space of a building refers to a three-dimensional solid including a cube or a rectangular parallelepiped formed by a floor surface, a wall surface, and a ceiling surface.

  Moreover, the surface element corresponding to parts other than an opening part is a surface element corresponding to a ceiling surface, a wall surface, a floor surface, a fitting surface, or an instrument surface.

  Further, the second configuration of the light environment analysis program according to the present invention is based on the shape data of the building to be evaluated acquired by the building information acquisition unit, and the shape data of the building by the surface element data configuration unit. An interior surface composed of a unit cube or unit cuboid corresponding to the unit space, and each surface element of the unit cube or unit cuboid is an opening surface which is a surface element corresponding to the opening of the shape data of the building And a first process for storing the surface element data by assigning coordinates and attribute data to a surface other than the opening, which is a surface element corresponding to a part other than the opening, and a light source surface light amount value The setting means recognizes the opening surface as a primary light source surface that serves as a surface element of the light source, and uses a surface other than the opening as a primary arrival surface that is a surface element through which light can reach from the primary light source surface. Recognize The primary light reaching from the primary light source surface by the second process of storing the light quantity value reaching the primary light source surface from the outside of the object in the surface element data related to the primary light source surface and the virtual ray vector setting means. Only a unit cube or unit cuboid corresponding to the unit space through which the ray vector set by the virtual ray vector setting unit passes is determined by the third process of setting the ray vector for the surface and the ray reachability determination unit. As a target, searching for whether or not the ray vector intersects with other surface elements other than the primary light source surface and the primary arrival surface in the course of tracing the ray vector set by the virtual ray vector setting means. By the fourth process for determining whether or not a light beam vector can reach the target primary arrival surface from the primary light source surface, and the arrival surface light amount value calculation means, When it is determined by the reachability determination means that the light vector set by the virtual light vector setting means is reachable from the primary light source surface to the target primary arrival surface, the light source is determined for the primary arrival surface. A light amount value obtained by multiplying the light amount value reaching the primary light source surface from the outside of the building set by the surface light amount value setting means by the aperture transmittance of the primary light source surface is used as the initial radiation light amount value of the primary light source surface. The light quantity value reaching the primary arrival surface from the primary light source surface is calculated in consideration of the transmittance of the surface element other than the primary light source surface and the primary arrival surface where the ray vectors intersect. The primary light source surface when the light beam reachability determining unit determines that the light vector set by the virtual light vector setting unit cannot reach the target primary arrival surface from the primary light source surface. To next candidate 1 For the next arrival surface, the third process by the virtual ray vector setting unit and the fourth process by the ray arrival possibility determination unit are sequentially performed, and the ray arrival light amount value calculation unit performs the ray arrival. The light source surface light amount value setting for the primary arrival surface determined by the availability determination means that the light vector set by the virtual light vector setting means is reachable from the primary light source surface to the target primary arrival surface. The light quantity value given to the primary light source surface by the means is used as the initial radiant light quantity value of the primary light source surface, and the primary light source surface and the other surface elements other than the primary arrival surface intersect with each other. The primary processing searched in the fifth processing by the fifth processing for calculating the light amount value reaching the primary arrival surface from the primary light source surface in consideration of the rate, and the arrival surface light amount value storage means Next to the light source For the primary arrival surface, the third processing by the virtual ray vector setting means, the fourth processing by the ray arrival possibility determination means, and the fifth processing by the arrival surface light quantity value calculation means. Sequentially executing the light quantity values reaching all the candidate primary arrival surfaces from the primary light source surface calculated in the fifth process with respect to all candidate primary arrival surfaces, The sixth process for storing the surface element data relating to all the primary arrival surfaces as candidates and the light amount value of the surface element data relating to all the candidate primary arrival surfaces by the reaching surface light amount value storage means. And adding a light amount value given from the primary light source surface of the next candidate, and executing a seventh process of updating and storing the surface element data related to all the primary arrival surfaces as candidates. Features.

  According to a third configuration of the light environment analysis program according to the present invention, in the light environment analysis program of the first and second configurations, the opening surface is a primary light source surface serving as a surface element of a light source. After the light beam reaches the target primary arrival surface from the primary light source surface, when the light beam is reflected on the primary arrival surface, the primary arrival surface is used as the secondary light source surface, and the secondary light source surface After the light beam reaches the secondary arrival surface of another object and then the light beam is reflected on the secondary arrival surface, the secondary arrival surface is sequentially set as a tertiary light source surface n (n = 1, 2, 3) ,...) After the light beam reaches the target n (n = 1, 2, 3,...) Next arrival surface from the next light source surface, the light beam travels from the n-order arrival surface toward the arrival surface other than the n-order arrival surface. In the second process, the light source surface light quantity value setting means recognizes the nth order arrival surface as the (n + 1) th order light source surface. And an amount of light stored in the surface element data related to the nth order arrival surface by recognizing an arrival surface other than the nth order arrival surface as an (n + 1) th order arrival surface that can be reached from the (n + 1) th order light source surface. A value is set as a light amount value of the (n + 1) th order light source surface, and in the third process, a light ray vector from the (n + 1) th order light source surface to the (n + 1) th order arrival surface by the virtual ray vector setting means. In the fourth process, only the unit cube or the unit rectangular parallelepiped corresponding to the unit space through which the ray vector set by the virtual ray vector setting unit passes is determined by the ray reachability determination unit. In the middle of tracing the ray vector set by the virtual ray vector setting means, the ray vector is other than the (n + 1) th order light source surface and the (n + 1) th order arrival surface. By searching whether or not it intersects with other surface elements, it is determined whether or not the (n + 1) th order light source surface can reach the target (n + 1) th order arrival surface. The surface light quantity value calculating means determines that the ray vector set by the virtual ray vector setting means is reachable from the (n + 1) th order light source surface to the target (n + 1) th order arrival surface by the ray reachability determination means. In addition, for the (n + 1) -order arrival surface, the initial light emission of the (n + 1) -order light source surface is obtained by multiplying the light amount value reaching the n-order arrival surface from the n-order light source surface by the diffuse emissivity of the n-order arrival surface. Considering the transmittance of the surface elements other than the (n + 1) th order light source surface and the (n + 1) th order arrival surface where the light vector intersects, the (n + 1) th order light source surface is used as the light amount value from the (n + 1) th order light source surface. Amount of light reaching the next surface In the seventh process, the reaching surface light amount value storage means calculates the next candidate to the light amount value of the surface element data relating to the (n + 1) th order reaching surface or all (n + 1) th order reaching surfaces as candidates. The amount of light given from the (n + 1) th order light source surface is added, and the surface element data relating to the (n + 1) th order arrival surface or all candidate (n + 1) th order arrival surfaces is updated and stored. The light quantity value storage means causes the second process by the light source surface light quantity value setting means, the third process by the virtual light vector setting means, the fourth process by the light ray reachability determination means, the arrival surface light quantity. The fifth process by the value calculation means and the sixth and seventh processes by the arrival surface light quantity value storage means are sequentially executed and added from the (n + 1) th light source surface to the (n + 1) th arrival surface. The amount of light And executes an eighth process of storing the light intensity value when it reaches the level the surface element data as the final light amount value of the face elements.

  Here, the reflection of the light beam at the n (n = 1, 2, 3,...) Next arrival surface means the light absorption and light emission at the n (n = 1, 2, 3,...) Next arrival surface. Including.

  Further, a fourth configuration of the light environment analysis program according to the present invention is the light environment analysis program according to any one of the first to third configurations, wherein the fourth process by the light beam reachability determining unit is the n. (N = 1, 2, 3,...) When determining whether or not a light beam can reach from the next light source surface to the n (n = 1, 2, 3,...) Next arrival surface, It includes a calculation process for determining whether or not the next arrival plane is visible from the magnitude relation on the coordinate axes.

  A fifth configuration of the light environment analysis program according to the present invention corresponds to the unit space of the internal space configured by the shape data of the building in the light environment analysis program of the first to fourth configurations. The unit cube or unit rectangular parallelepiped is a unit cube or unit rectangular parallelepiped based on the design module dimensions of the building.

  The first configuration of the light environment analysis apparatus according to the present invention is based on building information acquisition means for acquiring shape data of a building to be evaluated, and on the building shape data acquired by the building information acquisition means. The internal space composed of building shape data is divided into unit cubes or unit cuboids corresponding to the unit space, and each surface element of the unit cube or unit cuboid is a surface element corresponding to the opening of the building shape data. A surface element data composing unit that divides into a certain opening surface and a surface other than the opening that is a surface element corresponding to a portion other than the opening, and assigns coordinates and attribute data to store in the surface element data The aperture surface is recognized as a primary light source surface that is a surface element of the light source, and the surface other than the aperture is recognized as a primary arrival surface that is a surface element that can be reached by light from the primary light source surface. , Building exterior A light source surface light amount value setting means for storing a light amount value reaching the primary light source surface in surface element data relating to the primary light source surface, and a light vector from the primary light source surface to the primary arrival surface. Set by the virtual ray vector setting means, and only the unit cube or unit cuboid corresponding to the unit space through which the ray vector set by the virtual ray vector setting means passes is set as a determination target. In the course of tracing the light vector, the target light source surface is searched from the primary light source surface by searching for whether the light vector intersects the surface element other than the primary light source surface and the primary arrival surface. Set by the light ray reachability determining means for determining whether or not a light vector can reach the reaching surface, and the virtual light ray vector setting means by the light ray reachability determining means. When it is determined that the light vector can reach the target primary arrival surface from the primary light source surface, the primary arrival surface is determined from the outside of the building set by the light source surface light amount value setting means. The primary light source surface where the light vector intersects, with the light amount value obtained by multiplying the light amount value reaching the primary light source surface multiplied by the aperture transmittance of the primary light source surface as the initial radiant light amount value of the primary light source surface; A light amount value reaching the primary arrival surface from the primary light source surface is calculated in consideration of transmittance of other surface elements other than the primary arrival surface, and the virtual ray vector setting is performed by the light ray reachability determination unit. When it is determined that the ray vector set by the means cannot reach the target primary arrival surface from the primary light source surface, the primary candidate surface from the primary light source surface to the next candidate primary arrival surface Virtual ray vector setting means and the ray Each calculation process by the reachability determination unit is sequentially executed, and the light beam vector set by the virtual light vector setting unit by the light beam reachability determination unit can reach the target primary arrival surface from the primary light source surface. With respect to the primary arrival surface determined to be present, the light vector intersects with the light amount value given to the primary light source surface by the light source surface light amount value setting means as the initial radiant light amount value of the primary light source surface. A reaching surface light amount value calculating means for calculating a light amount value reaching the primary reaching surface from the primary light source surface in consideration of the transmittance of the primary light source surface and other surface elements other than the primary reaching surface; Reaching surface light amount value storing means for storing light amount values reaching the primary reaching surface from the primary light source surface calculated by the reaching surface light amount value calculating means in surface element data relating to the primary reaching surface; Prepared And features.

  Further, the second configuration of the light environment analysis apparatus according to the present invention is based on building information acquisition means for acquiring the shape data of the building to be evaluated, and the building shape data acquired by the building information acquisition means. The internal space composed of building shape data is divided into unit cubes or unit cuboids corresponding to the unit space, and each surface element of the unit cube or unit cuboid is a surface element corresponding to the opening of the building shape data. A surface element data composing unit that divides into a certain opening surface and a surface other than the opening that is a surface element corresponding to a portion other than the opening, and assigns coordinates and attribute data to store in the surface element data The aperture surface is recognized as a primary light source surface that is a surface element of the light source, and the surface other than the aperture is recognized as a primary arrival surface that is a surface element that can be reached by light from the primary light source surface. , Building exterior A light source surface light amount value setting means for storing a light amount value reaching the primary light source surface in surface element data relating to the primary light source surface, and a light vector from the primary light source surface to the primary arrival surface. Set by the virtual ray vector setting means, and only the unit cube or unit cuboid corresponding to the unit space through which the ray vector set by the virtual ray vector setting means passes is set as a determination target. In the course of tracing the light vector, the target light source surface is searched from the primary light source surface by searching for whether the light vector intersects the surface element other than the primary light source surface and the primary arrival surface. Set by the light ray reachability determining means for determining whether or not a light vector can reach the reaching surface, and the virtual light ray vector setting means by the light ray reachability determining means. When it is determined that the light vector can reach the target primary arrival surface from the primary light source surface, the primary arrival surface is determined from the outside of the building set by the light source surface light amount value setting means. The primary light source surface where the light vector intersects, with the light amount value obtained by multiplying the light amount value reaching the primary light source surface multiplied by the aperture transmittance of the primary light source surface as the initial radiant light amount value of the primary light source surface; A light amount value reaching the primary arrival surface from the primary light source surface is calculated in consideration of transmittance of other surface elements other than the primary arrival surface, and the virtual ray vector setting is performed by the light ray reachability determination unit. When it is determined that the ray vector set by the means cannot reach the target primary arrival surface from the primary light source surface, the primary candidate surface from the primary light source surface to the next candidate primary arrival surface Virtual ray vector setting means and the ray Each calculation process by the reachability determination unit is sequentially executed, and the light beam vector set by the virtual light vector setting unit by the light beam reachability determination unit can reach the target primary arrival surface from the primary light source surface. With respect to the primary arrival surface determined to be present, the light vector intersects with the light amount value given to the primary light source surface by the light source surface light amount value setting means as the initial radiant light amount value of the primary light source surface. A reaching surface light amount value calculating means for calculating a light amount value reaching the primary reaching surface from the primary light source surface in consideration of the transmittance of the primary light source surface and other surface elements other than the primary reaching surface; From the primary light source surface calculated by the arrival surface light quantity value calculation means to the next candidate primary arrival surface, the virtual ray vector setting means, the light ray reachability determination means, and the arrival surface light quantity value calculation Steps are sequentially executed, and all candidate primary arrivals are obtained from the primary light source surface calculated by the reaching surface light amount value calculating unit for all candidate primary arrival surfaces. After the light quantity value reaching the surface is stored in the surface element data related to all the primary arrival surfaces as candidates, the next candidate is set to the light amount value of the surface element data related to all the primary arrival surfaces as candidates. A reaching surface light amount value storage means for adding the light amount values given from the primary light source surfaces and updating and storing the surface element data related to all the primary reaching surfaces as candidates. To do.

  According to a third configuration of the light environment analysis apparatus of the present invention, in the light environment analysis apparatus of the first and second structures, the opening surface is a primary light source surface serving as a surface element of the light source, After a light beam reaches the target primary arrival surface from the primary light source surface, when the light beam is reflected on the primary arrival surface, the primary arrival surface is used as a secondary light source surface, and the secondary light source surface After the light beam reaches the target secondary arrival surface, when the light beam is reflected on the secondary arrival surface, n (n = 1, 2, 3,...) Sequentially set as the secondary light source surface. ) After the light beam reaches the target n (n = 1, 2, 3,...) Next arrival surface from the next light source surface, the light beam is reflected from the n-order arrival surface toward the arrival surface other than the n-order arrival surface. In this case, the light source surface light quantity value setting means recognizes the nth order arrival surface as the (n + 1) th order light source surface and reaches other than the nth order arrival surface. Is recognized as the (n + 1) th order arrival surface that can be reached from the (n + 1) th order light source surface, and the light amount value stored in the surface element data related to the nth order arrival surface is used as the light amount value of the (n + 1) th order light source surface. The virtual ray vector setting means sets a ray vector from the (n + 1) th order light source surface to the (n + 1) th order arrival surface, and the ray reachability determination means is determined by the virtual ray vector setting means. In the course of tracing the ray vector set by the virtual ray vector setting means with only the unit cube or unit cuboid corresponding to the unit space through which the set ray vector passes as the determination target, the ray vector is the (n + 1) th order light source. The target (n +) from the (n + 1) th order light source plane is searched by searching for whether or not it intersects with any other surface element other than the (n + 1) th order arrival surface. 1) It is determined whether or not the next arrival surface is reachable, and the arrival surface light amount value calculation means determines that the ray vector set by the virtual ray vector setting means by the ray arrival possibility determination means is the (n + 1) next light source surface. Diffusing the n-th order arrival surface to the light quantity value reaching the n-order arrival surface from the n-th order light source surface for the (n + 1) -order arrival surface determined to be reachable from the target (n + 1) -order arrival surface The light amount value multiplied by the emissivity is used as the initial radiant light amount value of the (n + 1) th order light source surface, and the surface elements other than the (n + 1) th order light source surface and the (n + 1) th order arrival surface where the light ray vectors intersect. The light amount value reaching the (n + 1) th order arrival surface from the (n + 1) th order light source surface is calculated in consideration of the transmittance, and the arrival surface light amount value storage means becomes the (n + 1) th order arrival surface or a candidate. On all (n + 1) th arrival planes The light amount value given from the (n + 1) th order light source surface of the next candidate is added to the light amount value of the surface element data, and the surface element related to the (n + 1) th order arrival surface or all (n + 1) th order arrival surfaces as candidates The data is updated and stored, and the respective calculations by the light source surface light quantity value setting means, the virtual light beam vector setting means, the light ray reachability determination means, the reaching surface light quantity value calculation means, and the reaching surface light quantity value storage means The process is sequentially executed, and the light amount value when the light amount value added from the (n + 1) th order light source surface to the (n + 1) th order arrival surface reaches a predetermined reference is used as the final light amount value of the surface element. A final light quantity value storing means for storing in the element data is provided.

  Further, a fourth configuration of the optical environment analysis apparatus according to the present invention is the optical environment analysis apparatus of the first to third configurations, in which the light beam reachability determining means is the n (n = 1, 2, 3). ,...) When determining whether or not a light beam can reach the n (n = 1, 2, 3,...) Next arrival surface from the next light source surface, the n-order light source surface and the n-order arrival surface are coordinate axes. It is characterized by determining whether it can be seen from the above magnitude relationship.

  Moreover, the 5th structure of the optical environment analysis apparatus which concerns on this invention is a unit corresponding to the unit space of the internal space comprised by the shape data of the said building in the optical environment analysis apparatus of the said 1st-4th structure. The cube or unit cuboid is a unit cube or unit cuboid based on the design module dimensions of the building.

  According to a sixth configuration of the optical environment analysis apparatus of the present invention, in the optical environment analysis apparatus having the first to fifth configurations, a unit space of an internal space configured by the shape data of the building to be evaluated. Light quantity value display means for displaying the final reached light quantity value for each unit space of the internal space of the building based on the final reached light quantity value stored in the face element data of each face element of the corresponding unit cube or unit rectangular parallelepiped It is provided with.

  According to a seventh configuration of the optical environment analysis apparatus of the present invention, in the optical environment analysis apparatus of the first to fifth configurations, a unit space of an internal space configured by the shape data of the building to be evaluated A light amount value display means for displaying a final light amount value for each unit space of the internal space of the building for each of the regions divided into a lattice based on the corresponding unit cube or unit rectangular parallelepiped And

  Further, an eighth configuration of the optical environment analysis apparatus according to the present invention is the optical environment analysis apparatus of the second to seventh configurations, in which measurement is performed at a predetermined position on the coordinate axis of the shape data of the building to be evaluated. The final light quantity of all the surface elements stored by the measurement surface element setting means for setting the surface element and the final light quantity value storage means described in the third configuration of the light environment analyzer according to the present invention described above. Value and the light quantity value stored in the surface element data relating to the primary light source surface, which is the surface element of the light source, the opening surface described in the first and second configurations of the light environment analyzing apparatus according to the present invention described above. Brightness calculating means for calculating the brightness on the measuring surface element set by the measuring surface element setting means, and the brightness on the measuring surface element calculated by the brightness calculating means Brightness display means for displaying the brightness To.

  The ninth configuration of the optical environment analysis apparatus according to the present invention is the optical environment analysis apparatus of the eighth configuration, wherein the measurement surface element set by the measurement surface element setting means is the evaluation target. It is characterized in that it is set on a horizontal plane of a certain height from the floor composed of building shape data.

  According to the first and second configurations of the light environment analysis program according to the present invention and the first and second configurations of the light environment analysis apparatus according to the present invention, based on the shape data of the building to be evaluated. It is possible to predict the indoor brightness environment that considers the opening that takes in outside light as a light source, and it is an opening by reconfiguring the interior space of the building as a combination of surface elements in the light environment analysis calculation Because it predicts the reachability of light rays radiated from the light source surface to each arrival surface one by one, calculates the light amount value of the reachable reach surface, and eliminates the calculation of the unreachable light amount value Arithmetic processing is simple and quick.

  According to the third configuration of the light environment analysis program according to the present invention and the third configuration of the light environment analysis device according to the present invention, light reflection (absorption / radiation) in the indoor environment is taken into consideration. Can predict the natural light environment distribution.

  Further, according to the fourth configuration of the light environment analysis program according to the present invention and the fourth configuration of the light environment analysis apparatus according to the present invention, the geometric relationship of the shape data is determined in the course of the light environment analysis calculation. By using it, it is possible to speed up the arithmetic processing.

  According to the fifth configuration of the light environment analysis program according to the present invention and the fifth configuration of the light environment analysis apparatus according to the present invention, a unit cube or a unit cuboid corresponding to the unit space of the internal space of the building Is standardized based on the design module dimensions of the building, the procedure of the light environment analysis calculation processing can be simplified.

  According to the sixth configuration of the light environment analysis apparatus of the present invention, the light quantity distribution of the surface element can be shown as a method of expressing the indoor brightness.

  According to the seventh configuration of the light environment analysis apparatus of the present invention, the indoor brightness can be expressed by a grid area corresponding to the surface element.

  According to the eighth configuration of the light environment analysis apparatus of the present invention, the brightness on the measurement surface element at an arbitrary position can be calculated and displayed. As a result, a light amount value obtained by combining the horizontal plane light amount value and the vertical surface light amount value at the virtual height can be calculated, and the brightness distribution per unit area can be displayed.

  According to the ninth configuration of the light environment analysis apparatus according to the present invention, it is possible to calculate and display the brightness on a horizontal plane having an arbitrary height. Thereby, the brightness distribution of the work surface can be displayed for the entire interior space of the building.

  In the present invention, the interior space to be simulated for the light environment is subdivided into unit cubes, and the light source surface and the arrival surface are processed in a one-to-one correspondence. Compared with the case where the radiation beam is diffused in a larger amount than the number of arrival surfaces, the calculation processing amount is obviously reduced. In addition, since all the reaching surfaces are similarly targeted without omission, the calculation accuracy is improved as a whole.

  In other words, since the conventional method is based on the tracking of a single ray, a large number of ray tracing must be performed in order to maintain the calculation accuracy to reach all the arrival surfaces without omission. There is no guarantee that the amount will increase and that all the reach surfaces will be subject to calculation without omission.

  Compared to this, the present invention describes the relationship between the light source surface and the arrival surface through the virtual ray vector, so that all the arrival surfaces can be calculated without omission and the calculation amount is reduced as compared with the conventional method. I can do it.

  Both methods are equivalent when the space division to be calculated is made as fine as possible and when the number of radiation rays is increased infinitely.

  However, the method of the present invention is necessary for the calculation procedure in order to perform the space division with an appropriate size and maintain the calculation speed and accuracy.

  As a result, it is possible to identify a position (place) on the floor plan with sufficient brightness in the building, and detect the position (place) on the floor plan where the brightness is insufficient (weak point) and display it on the screen. This makes it possible for the building designer and the resident to recognize the degree of brightness distribution throughout the building.

  In addition, for the position (place) on the floor plan where the brightness is insufficient, the designer changes the floor plan of the building (moving, adding, and deleting the partition walls and openings), and CAD is performed on a trial and error basis. (Computer Aided Design; computer-aided design) After the change is input by the system, the light environment analysis program and the light environment analysis apparatus according to the present invention perform brightness distribution calculation processing, thereby performing natural lighting. There is a special effect that it is possible to design a secured building.

An embodiment of an optical environment analysis program and an optical environment analysis apparatus according to the present invention will be specifically described with reference to the drawings. FIG. 1 is a diagram showing an example of the appearance of an optical environment analysis apparatus according to the present invention, FIG. 2 is a block diagram illustrating the configuration of a control system of the optical environment analysis apparatus according to the present invention, and FIGS. FIG. 4 is a perspective view and plan view showing an example of the floor plan of the building to be evaluated by a CAD drawing, FIG. 4 is a flowchart showing an example of calculation processing by the light environment analysis program according to the present invention, and FIG. 5 is step S of FIG. _6, a flowchart illustrating the details of the S _18, FIG. 6 is a diagram showing an example of the shape data of the buildings to be analyzed, 7 the image view of the analysis space of the building to be evaluated, the interior space of FIG. 8 is evaluated building 9 is a diagram showing a relationship between unit cubes and surface elements constituting FIG. 9, FIG. 9 is a diagram showing a state in which a visual judgment is made based on a magnitude relationship on a coordinate axis between a light source surface element and a light ray arrival candidate surface, and FIG. The emitted ray reaches the surface element FIGS. 11 (a) to 11 (c) are diagrams showing how the light rays emitted from the light source surface element reach the arrival surface element. FIG. 12 is a conceptual explanatory diagram for explaining how to obtain a form factor when the light source surface element is an X-axis direction wall element of the coordinate axis and the reaching surface candidate is also an X-axis direction wall element, and FIG. Fig. 14 shows how radiation light reaches a plurality of arrival surfaces from a surface and gives light quantity values.Fig. 14 shows how radiation light from a plurality of light source surfaces reaches the same arrival surface and the light amount values are added. Fig. 15 is a diagram showing how light rays that reach a surface element radiate to reach another arrival surface again. Fig. 16 is the first floor of a building where no opening is set near the stairs. Fig. 17 shows an example of the brightness distribution of a part. Fig. 17 shows the first floor of a building with an opening near the stairs. FIG. 18 shows an example of an input screen for setting the measurement surface element setting means, and FIGS. 19A to 19C show examples of surface element data. FIG.

  1 and 2, reference numeral 1 denotes a control device (CPU) constituted by a personal computer (hereinafter referred to as “personal computer”), 2 is a display as display means, 3 is a keyboard as input means, and 4 is input. A mouse serving as means, and a printer 25 serving as output means.

  Reference numeral 5 denotes a building information acquisition unit as building information acquisition means, and various building shape data stored and stored in a building shape information database (hereinafter “building shape information DB”) 7 as building shape information storage means. To obtain the shape data of the building to be evaluated. The building shape data includes roofs, outer walls 27, verandas, ceilings, partition walls 26, floors 28, openings 19, fixtures 29, and items 30 such as sinks, kitchen sets, unit baths, furniture, or home appliances. Various shape data are stored.

  Reference numeral 6 denotes a surface element data configuration unit serving as a surface element data configuration unit. Based on the building shape data acquired by the building information acquisition unit 5, the internal space configured by the shape data of the building corresponds to the unit space. Dividing into unit cubes or unit cuboids, each surface element of the unit cube or unit cuboid corresponds to an opening surface 20 that is a surface element corresponding to the opening 19 of the building shape data, and a portion other than the opening 19 It is divided into surfaces other than the opening, which are surface elements, and coordinates and attribute data are given and stored in surface element data described later in detail with reference to FIG. 19 (first processing).

  Reference numeral 8 denotes a light source surface light amount value setting unit serving as a light source surface light amount value setting means. The opening surface 20 corresponding to the opening 19 of the building shape data is used as a primary light source surface serving as a surface element of the light source. Recognize and recognize the surface other than the opening 19 as a primary arrival surface which is a surface element that the light beam can reach from the primary light source surface, and determine the light quantity value reaching the primary light source surface from the outside of the building. Details of the primary light source surface shown in FIG. 19 are stored in the surface element data described later (second processing).

  Reference numeral 9 denotes a virtual ray vector setting unit serving as a virtual ray vector setting means, which sets a ray vector 22 from the primary light source surface to the primary arrival surface (third process).

  Reference numeral 10 denotes a light beam reachability determination unit serving as a light beam reachability determination unit. Only a unit cube or a unit cuboid corresponding to a unit space through which the light beam vector 22 set by the virtual light beam vector setting unit 9 passes is determined as the determination target. In the middle of tracing the light ray vector 22 set by the light ray vector setting unit 9, the light vector 22 is searched for whether it intersects with other surface elements other than the primary light source surface and the primary arrival surface. It is determined whether or not the light vector 22 can reach the target primary arrival surface from the next light source surface (fourth processing).

  Reference numeral 11 denotes an arrival surface light amount value calculation unit serving as an arrival surface light amount value calculation unit. The light ray vector 22 set by the virtual light ray vector setting unit 9 by the light ray reachability determination unit 10 is changed from the primary light source surface to the target primary arrival surface. When it is determined that the primary light source surface is reachable, the aperture of the primary light source surface is set to the light amount value that has reached the primary light source surface from the outside of the building set by the light source surface light amount value setting unit 8. The light quantity value multiplied by the partial transmittance is taken as the initial radiant light quantity value of the primary light source surface, and the transmittance of the other surface elements other than the primary light source surface and the primary arrival surface where the light vector 22 intersects is taken into consideration. Then, the light quantity value reaching the primary arrival surface from the primary light source surface is calculated, and the light ray vector 22 set by the virtual light ray vector setting unit 9 by the light ray reachability determination unit 10 is obtained from the primary light source surface. If it is determined that the primary reach is not reachable, From the primary light source surface to the next candidate primary arrival surface, the above-described third processing by the virtual ray vector setting unit 9 and the above-described fourth processing by the ray reachability determination unit 10 are sequentially executed, For the primary arrival surface determined by the light ray reachability determination unit 10 that the light vector 22 set by the virtual light vector setting unit 9 is reachable from the primary light source surface to the target primary arrival surface, the light source The light quantity value given to the primary light source surface by the surface light quantity value setting unit 8 is used as the initial radiant light quantity value of the primary light source face, and other than the primary light source face and the primary arrival face where the light vectors intersect. A light amount value reaching the primary arrival surface from the primary light source surface is calculated in consideration of the transmittance of the surface element (fifth process).

  Reference numeral 12 denotes an arrival surface light amount value storage unit serving as an arrival surface light amount value storage unit. The arrival surface light amount value calculation unit 11 reaches the primary arrival surface from the primary light source surface calculated in the fifth process described above. The light amount value is shown in FIG. 19 relating to the primary arrival surface, and is stored in surface element data described in detail later (sixth processing).

  The arrival surface light amount value storage unit 12 adds the light amount value given from the primary light source surface of the next candidate to the light amount value of the surface element data shown in FIG. The surface element data, which will be described later in detail with reference to FIG. 19 relating to the primary arrival surface, is updated and stored (seventh processing).

  Further, the arrival surface light amount storage unit 12 performs the above-described third process by the virtual ray vector setting unit 9 from the primary light source surface searched in the above-described fifth process to the next candidate primary arrival surface. The above-described fourth processing by the light beam reachability determination unit 10 and the above-described fifth processing by the arrival surface light amount value calculation unit 11 are sequentially executed, and the above-described processing is performed on all candidate primary arrival surfaces. The light quantity values that reach all the primary arrival surfaces that are candidates from the primary light source surface calculated in the fifth process are shown in FIG. 19 for all the primary arrival surfaces that are candidates and will be described in detail later. Is stored in the surface element data (other sixth processing).

  Further, the reaching surface light amount value storage unit 12 is given from the primary light source surface of the next candidate to the light amount value of the surface element data shown in FIG. The light quantity value is added, and the surface element data shown in FIG. 19 relating to all the primary arrival surfaces as candidates is updated and stored in detail (other seventh processing).

  The opening surface 20 corresponding to the opening 19 of the building shape data is used as a primary light source surface as a surface element of the light source, and light rays reach the target primary arrival surface from the primary light source surface. After that, when light rays are reflected on the primary arrival surface, the primary arrival surface is used as a secondary light source surface, and after the light rays reach the other secondary arrival surface from the secondary light source surface, the 2 When the light ray is reflected on the next arrival surface, the secondary arrival surface is set as the tertiary light source surface in order, and the target n (n = 1, 2, 2,...) Is sequentially set from the n (n = 1, 2, 3,. 3,...) When the light beam is reflected from the nth order arrival surface toward the arrival surface other than the nth order arrival surface after the light beam has reached the next arrival surface, The setting unit 8 recognizes the nth-order arrival surface as the (n + 1) th-order light source surface, and sets the arrival surface other than the nth-order arrival surface from the (n + 1) th-order light source surface. Recognizing as the (n + 1) th order arrival surface that the line can reach and setting the light quantity value stored in the surface element data relating to the nth order arrival surface as the light quantity value of the (n + 1) th order light source surface, In the processing, the light ray vector setting unit 9 sets the light vector 22 from the (n + 1) th order light source surface to the (n + 1) th order arrival surface, and in the above-described fourth processing, the light ray reachability determination unit 10 sets the virtual light ray. In the course of tracing the ray vector 22 set by the virtual ray vector setting unit 9, only the unit cube or unit rectangular parallelepiped corresponding to the unit space through which the ray vector 22 set by the vector setting unit 9 passes is determined. From the (n + 1) th order light source surface to the target (n + 1) th order arrival surface by searching whether or not the surface element other than the (n + 1) th order light source surface and the (n + 1) th order reach surface In the fifth process described above, the light vector 22 set by the virtual light vector setting unit 9 by the light arrival reachability determination unit 10 is changed to the (n + 1) th order light source by the arrival surface light amount value calculation unit 11. For the (n + 1) th order arrival surface that is determined to be reachable from the surface to the target (n + 1) th order arrival surface, the nth order arrival surface is diffused to the light amount value that has reached the nth order arrival surface from the nth order light source surface. The light quantity value multiplied by the emissivity is used as the initial radiant light quantity value of the (n + 1) th order light source surface, and the transmission through other surface elements other than the (n + 1) th order light source surface and the (n + 1) th order arrival surface where the light vector 22 intersects. The amount of light reaching the (n + 1) th order arrival surface from the (n + 1) th order light source surface is calculated in consideration of the rate, and in the seventh process described above, the arrival surface amount of light value storage unit 12 performs (n + 1) th order arrival. Surface elements related to all (n + 1) th arrival surfaces that are surfaces or candidates The light quantity value given from the (n + 1) th order light source surface of the next candidate is added to the light quantity value of the data, and the surface element data relating to the (n + 1) th order arrival surface or all candidate (n + 1) th order arrival surfaces Update and store.

  Reference numeral 13 denotes a final light quantity value calculation unit serving as a final light quantity value storage unit. The second process by the light source surface light quantity value setting unit 8, the third process by the virtual light vector setting unit 9, and light arrival. The fourth process by the availability determination unit 10, the fifth process by the arrival surface light amount value calculation unit 11, and the sixth and seventh processes by the arrival surface light amount value storage unit 12 are sequentially executed, and (n + 1) ) FIG. 19 shows the light amount value when the light amount value added from the next light source surface to the (n + 1) next arrival surface reaches a predetermined reference as the final light amount value of the surface element. (Eighth processing).

  In the above-described fourth process by the light beam reachability determination unit 10, the light beam reaches from the n (n = 1, 2, 3,...) Next light source surface to the n (n = 1, 2, 3,...) Next reach surface. Computation processing for determining whether or not the nth-order light source surface and the nth-order arrival surface can be seen from each other based on the magnitude relationship on the coordinate axes when determining whether or not they are possible is included.

  In the case of the present embodiment, the unit cube or unit cuboid corresponding to the unit space of the internal space constituted by the building shape data created by the surface element data construction unit 6 is a unit cube or unit based on the design module dimensions of the building. Consists of a rectangular parallelepiped.

  14 is a light intensity value display unit serving as a light intensity value display means, and is stored in the surface element data of each surface element of a unit cube or a unit rectangular parallelepiped corresponding to the unit space of the internal space configured by the shape data of the building to be evaluated. Based on the final reached light quantity value, the final reached light quantity value for each unit space of the interior space of the building is displayed on the display 2.

  In addition, the light quantity value display unit 14 is provided for each of the regions divided into a grid based on a unit cube or a unit rectangular parallelepiped corresponding to a unit space of the internal space configured by the shape data of the building to be evaluated. The final reached light amount value for each unit space of the internal space is displayed on the display 2.

  A measurement surface element setting unit 15 serving as a measurement surface element setting unit sets a measurement surface element at a predetermined position on the coordinate axis of the shape data of the building to be evaluated.

  Reference numeral 16 denotes a brightness calculation unit serving as a brightness calculation means. The final light amount values of all the surface elements stored by the final light amount value storage unit 13 and the surface elements corresponding to the openings 19 of the building shape data On the surface element for measurement set by the surface element setting unit 15 for measurement, the light quantity value stored in the surface element data relating to the primary light source surface as the surface element of the light source is used as the light source value. Calculate brightness.

  Reference numeral 17 denotes a brightness display section serving as a brightness display means, which displays the brightness on the measurement surface element calculated by the brightness calculation section 16.

  The measurement surface element set by the measurement surface element setting unit 15 is set on a horizontal plane having a certain height from the floor 28 composed of the shape data of the building to be evaluated.

  The processing operation of the light environment analysis apparatus according to the present invention and the light environment analysis program installed therein will be described below with reference to the flowcharts shown in FIGS.

First, in step S ₁ in FIG. 4, to obtain the shape data of the subject building by building information acquisition unit 5 serving as a building information acquisition means is stored in the building shape information DB7. Here, the building shape data refers to each part such as a ceiling, a wall, a floor 28, a fixture 30, a fitting 29 element, and an opening 19 element, based on the floor plan of the building. The container 30 refers to home appliances such as a refrigerator and furniture.

  Based on the floor plan of the building necessary for evaluation, by reading the specific building CAD (Computer Aided Design; computer-aided design) data stored in the building shape information DB 7 by inputting with the keyboard 3 or mouse 4 as input means Only the shape data of the part can be extracted.

  It is also possible to extract only the building shape data temporarily stored by the building information acquisition unit 5 from the CAD data which is input by the keyboard 3 or mouse 4 serving as input means and temporarily stored in the memory 18 serving as storage means. .

  FIG. 3A shows building CAD data. From these data, as shown in FIG. 3B, the roof, the outer wall 27, the opening 19, the ceiling surface, the partition wall 26, the floor 28, the fitting 29, furniture, and the like are extracted as building shape data.

In step S ₂ in FIG. 4, the evaluation of the building interior space constructed by building shape data, as shown in FIG. 7, it is divided into unit cubes or unit cuboid corresponding to the unit space. Next, in step S ₃ , a set of surface elements constituting the unit cube or unit cuboid corresponding to the unit space by associating the building shape data with the unit cube or unit cuboid building shape corresponding to the unit space. Reconfigure as.

In step S _4, the opening surface 20 is a corresponding surface element to the opening 19 of the shape data of the buildings shown in FIGS. 6 and 7, the opening is a surface element corresponding to a site other than the opening The primary light source surface that separates the surface from the primary surface and makes the aperture surface 20 the surface element of the light source, and the primary arrival that is a surface element that allows light rays to reach the surface other than the aperture from the primary light source surface. Divided into planes.

In step S _5, each surface becomes a surface element light quantity value data storing means for each element surface element light value information database (hereinafter, "surface element light value information DB" hereinafter) stores the surface element data 21.

The above steps S _{1 to} S ₅ are executed by the calculation process of the surface element data configuration unit 6 which is a surface element data configuration unit.

  Here, as shown in FIG. 7, the surface element data configuration unit 6 serving as the surface element data configuration unit divides the internal space configured by the building shape data into unit cubes or unit cuboids corresponding to the unit spaces, Each surface element of the unit cube or unit rectangular parallelepiped is a surface element corresponding to the opening surface 20 corresponding to the opening 19 of the building shape data shown in FIG. It is divided into surfaces other than the opening, and coordinates and attribute data are given and stored in each surface element data shown in FIG. 19A stored in the surface element light quantity value information DB 21.

  In this embodiment, the unit cube or unit cuboid corresponding to the unit space of the internal space constituted by the building shape data is reconfigured into a unit cube or unit cuboid based on the design module dimensions of the building.

FIG. 6 and FIG. 7 show an example in which the surface element data construction unit 6 reconstructs the internal space composed of building shape data into unit cubes or unit cuboids corresponding to the unit spaces. That is, in order to redefine the unit cube or the unit rectangular parallelepiped corresponding to the unit space for analyzing the light environment of the building internal space, for example, the internal space of the building is reconfigured as a combination of the same unit cubes as shown in FIG. (Step S _{3 in} FIG. 4).

Furthermore, among the surface data constituting the unit cube or unit rectangular parallelepiped corresponding to the unit space, among the building shape data, the ceiling, floor 28, wall (outer wall 27, partition wall 26), opening 19, surface of fitting 29, and kitchen Set 30, washbasin, unit bath, furniture, home appliances and other items 30 Other elements that block the passage of light and the position coordinates of each surface element that constitutes a unit cube or unit cuboid corresponding to the unit space The surface element corresponding to the part other than the opening 19 such as the ceiling, the wall, the floor 28 (hereinafter referred to as “surface other than the opening”) and the surface element corresponding to the opening 19 (hereinafter referred to as “opening surface 20”) And attribute data are given (step S _{4 in} FIG. ₄ ).

  In the present embodiment, a unit cube in which the internal space corresponds to the unit space with the coordinate in the three directions of the plane axis (X-axis, Y-axis) and the vertical axis (Z-axis) on the coordinate axis as the reference of the plane module dimensions of the building. Or divide into unit cubes. Here, the module dimension refers to a unit dimension used as a reference in the design of a building, and the dimensions of each part such as between the columns of the building are designed to be a multiple of this unit dimension.

  Therefore, when the internal space of the building is divided into unit cubes or unit cuboids which are unit spaces, it is preferable that the internal space of the building is matched to the planar module dimensions of the building. For example, when the module size is 305 mm, a cube whose side is 305 mm in the X-axis, Y-axis, and Z-axis directions on the coordinate axis can be divided as a unit cube corresponding to the unit space. When the module size is 500 mm, a cube having a side of 500 mm in the X-axis, Y-axis, and Z-axis directions on the coordinate axis can be divided as a unit cube corresponding to the unit space.

  In addition, when divided into unit cubes corresponding to the unit space, depending on the ceiling height, the Z-axis direction may not be divisible by an integer value even if all plane module dimensions are applied. In this case, instead of the unit cube, the vertical axis (Z-axis) direction may be divided into other units other than the plane module dimensions to be divided into a solid (unit cuboid) having an equal volume.

  FIG. 8 shows a grid-like reference line drawn in the X-axis, Y-axis, and Z-axis directions (three-dimensional directions) on the coordinate axes, using the plane module dimensions used for building design as reference dimensions. It shows a unit rectangular parallelepiped which is a unit space of the internal space of the building corresponding to the formed grid.

  The position of the unit cube or unit cuboid configured in this way is the point having the largest coordinate value with respect to the spatial axis among the vertices of the unit cube or unit cuboid, and the position of this representative point is the unit cube. Or it recognizes as the position of a unit rectangular parallelepiped. Specifically, as shown in FIG. 8, the vertex of the unit rectangular parallelepiped located farthest from the origin is set as the representative point (i, j, k).

  The unit cube or unit rectangular parallelepiped has six faces. That is, the unit cube or unit rectangular parallelepiped has six surfaces in total, two surfaces each perpendicular to the three spatial axes in the X-axis, Y-axis, and Z-axis directions on the coordinate axis.

  Then, by recognizing only the surface element that is outside (positive direction) with respect to the spatial axis among the two planes about the same spatial axis in the X-axis, Y-axis, or Z-axis direction, the position is unit cube. The position specification integer value of is specified.

  That is, as shown in FIG. 8, the position coordinates of the three surface elements of the X-axis direction surface element, the Y-axis direction surface element, and the Z-axis direction surface element for the unit cube or unit rectangular parallelepiped corresponding to one unit space. Is identified. As a result, the unit cube or unit cuboid does not need to have data on all six sides, and the procedure of arithmetic processing can be reduced, contributing to high-speed processing.

  Next, with respect to the X-axis direction surface element, Y-axis direction surface element, and Z-axis direction surface element of the unit cube or unit rectangular parallelepiped, the opening surface 20 and the surface other than the opening are determined from the overlap of the position coordinates with the building shape data. The attribute data is given by quoting the shape data of each building.

  Specifically, (1) when the surface element overlaps the opening 19, (2) the surface element overlaps a portion other than the opening 19 such as the ceiling, wall (outer wall 27, partition wall 26), floor 28, etc. In this case, (3) when there is no shape data (null data), the attribute data (part attribute) is given by determining which of the above three attributes. At this time, each part also provides part transmittance, which is light transmittance, as attribute data. In particular, the opening 19 is given glass transmittance (opening transmittance).

  In addition, the X-axis direction surface element, the Y-axis direction surface element, and the Z-axis direction surface element are respectively the front side (positive side of the coordinate axis) and the back side (coordinate axis side) with respect to the X, Y, and Z spatial axes. Since there are two surfaces on the negative direction side, it is necessary to treat the two surfaces as separate surfaces. Therefore, it is necessary to determine whether the surface is (1) front or (2) back, and attribute data (surface Attribute). As will be described later, the surface element data is stored to determine whether or not the surface elements are in a positional relationship that can be seen from the magnitude relationship on the coordinate axes.

  Furthermore, it is necessary to have light quantity value data for each surface element in the calculation processing for analysis and the calculation processing for display described later. For this reason, the light source surface light amount value setting unit 8 serving as the light source surface light amount value setting unit 8 represents one light amount value for each of the surface elements of the X-axis direction surface element, the Y-axis direction surface element, and the Z-axis direction surface element. Data is stored. That is, the data of the representative light amount value or the representative reaching light amount value with respect to the representative coordinates corresponds to each surface element.

  To summarize the above, each surface element data of a unit cube or a unit rectangular parallelepiped corresponding to the unit space is [part attribute (floor F, wall W, ceiling C, other fittings, equipment, etc., as shown in FIG. 19 (a)]. In addition to the openings, the opening Wi of the opening 19 and the like, the part transmittance, the surface element direction (X, Y, Z), the representative point coordinate values (X coordinate value, Y coordinate value, Z coordinate value (for example, FIG. 8) i, j, k)), surface attributes (front and back), light quantity value (light source light quantity value, reached light quantity value)].

  Through these procedures, the internal space of the building subject to evaluation analysis is reconstructed with plane elements of unit cubes or unit cuboids corresponding to unit spaces having unique data structures, and from the data structure shown in FIG. 19 (a) By using the surface element data, the position of each surface element and in which direction each surface element faces can be expressed by a rectangular coordinate system and integer coordinate values.

  As a result, when determining whether or not a virtual ray vector 22 described later is obstructed by a surface element, an integer coordinate value is used for the position of the surface element. The procedure can be simplified.

Next, in step S ₆ in FIG. 4, the primary light source surface opening surface 20 a surface element of the light source is a surface element that light can reach the non-opening portion 19 faces from the primary light source surface 1 As the next arrival surface, a reaching light amount value reaching the primary arrival surface from the primary light source surface is calculated.

  That is, the process proceeds to step S7 in FIG. 5 to search for a primary arrival surface that is a candidate for a ray to reach from the primary light source surface. First, as a preprocessing, the light source surface light amount value setting unit 8 serving as a light source surface light amount value setting unit recognizes the opening surface 20 shown in FIG. 7 as a primary light source surface serving as a surface element of the light source, and also illustrated in FIG. A surface other than the opening 19 is recognized as a primary arrival surface, which is a surface element through which light can reach from the primary light source surface, and a light amount value reaching the primary light source surface from the outside of the building is determined as the primary light source surface. Is stored in the surface element data relating to the.

  Specifically, the surface element that is the attribute of the opening 19 shown in FIG. 6 is extracted as the opening surface 20 shown in FIG. 7 and recognized as the primary light source surface. In the present embodiment, the light amount value corresponding to the total sky illuminance of 5000 lux is regarded as the light amount value reaching the opening 19 of the building, and is stored in the surface element data as the light amount value of each surface element constituting the opening 19. Arithmetic processing is performed. Since the primary light source surface is the initial value of the emitted light amount value with respect to each primary arrival surface of the interior space of the building, this light amount value is not the value reached from the outside, but the aperture transmittance (mainly Multiplied by (corresponding to the transmittance of the glass).

  As a method for setting the light amount value reaching the opening 19, a method for setting the light amount value by a method as disclosed in, for example, Japanese Patent Application Laid-Open No. 2000-8476 can be assumed. Note that the whole sky illuminance is the sky light illuminance with nothing being obstructed and a horizontal plane over which the whole sky can be seen as a receiving surface. The sky light illuminance is the illuminance by sky light, and the sky light is light from the sky other than the sun. The skylight condition corresponding to a total sky illumination of 5000 lux corresponds to a cloudy sky with no direct sunlight and a rather dim daytime.

  Further, the surface elements other than the opening 19 such as the floor 28, the wall (the outer wall 27, the partition wall 26), and the ceiling are extracted as surfaces other than the opening and recognized as the primary arrival surface. Further, when there is no part (null data), it is excluded from the reachable surface candidates.

In step S _8, the arithmetic processing by the light beam reaches determination unit 10, and the primary light source surface in determining the light arrival whether from the primary light source surface to the primary reach surfaces, and said primary reach surface However, if it is not visible, the process returns to the step S7 to extract the next candidate primary arrival surface. As a result, surface elements that cannot naturally reach from the light source surface can be excluded from the light amount calculation in advance, and the calculation time can be shortened.

  Here, the light beam reachability determination unit 10 determines whether or not the light beam can reach from the n (n = 1, 2, 3,...) Next light source surface to the n (n = 1, 2, 3,...) Next reach surface. At this time, it is determined whether or not the n-order light source surface and the n-order arrival surface are visible from the magnitude relationship on the coordinate axes.

  Specifically, FIG. 9 shows an example of the relationship between the primary light source surface and each surface element serving as the primary arrival surface. In FIG. 9, for the mutual positional relationship between the primary light source surface and the primary arrival surface, refer to the coordinate values (representative point coordinate values of the unit cube) of each surface element and the surface attributes (front and back) of the data of each surface element. Judgment.

  This makes it possible to determine whether or not they are visible to each other (visibility) based on the simple relationship between the coordinate values, and the comparison of the coordinate values can be performed with integer values, making it ambiguous Highly reliable judgment can be made without accompanying.

  For example, the data structure of “light source surface α” in FIG. 9 is [aperture, transmittance 100%, X, a, b, c, table, light amount value]. That is, the light source surface α has a part attribute of opening 19, the surface element direction is X, and the coordinate value of the representative point is a in the X-axis direction, b in the Y-axis direction, and c in the Z-axis direction. Yes, the surface attribute is a table (positive direction side on the coordinate axis).

  On the other hand, in the data structure of “arrival surface A”, the site attribute is a wall, the surface element direction is Y, and the coordinate values of the representative points are d in the X axis direction, e in the Y axis direction, and Z axis. The direction is f, and the surface attribute is a table (positive direction side on the coordinate axis).

  In this case, the relationship between the X, Y, and Z coordinate values is as follows: in the X-axis direction, the coordinate value d of the reaching surface A> the coordinate value a of the light source surface α, and in the Y-axis direction, the coordinate value e of the reaching surface A <light source surface. In the coordinate value b of α and the Z-axis direction, the coordinate value c of the reaching surface A and the coordinate value f of the light source surface α are arbitrary. Since the arrival surface d has a larger coordinate value than the light source surface a in the X-axis direction, it is determined that “light source surface α” to “arrival surface A” are “visible” from the magnitude relationship on the coordinate axis.

  In addition, the surface element assumed as another reaching surface shown as “other surface element B” in FIG. 9 has a part attribute of null, a representative point coordinate value of g in the X-axis direction, h in the Y-axis direction, The Z-axis direction is i, and the surface attribute is a table (positive direction side on the coordinate axis).

  In this case, the relationship between the coordinate values in the X-axis direction is as follows: the assumed coordinate value g of the arrival surface B <the coordinate value a of the light source surface α, and the “other surface element B” from the “light source surface α” to the coordinate axis Based on the above magnitude relationship, it is determined that it is “not visible”, and it is recognized as a surface element that a light beam cannot naturally reach from the light source surface.

In this manner, when the arrival candidate surfaces from the light source surface is determined it can be visualized in the step S ₈ proceeds to step S _9. Further, the with respect to step S ₇ to return the next arrival face candidate, it is determined whether the visible may similarly to the above, if it is determined not be visible arrival candidate surfaces from the light source surface in the step S ₈ .

In step S _9, the virtual light vector setting unit 9 serving as a virtual light vector setting means sets a light vector 22 to the primary reaches surface from the primary light source surface.

In steps S _{10 to} S ₁₂ , a unit cube or unit rectangular parallelepiped corresponding to the unit space through which the light beam vector 22 set by the virtual light vector setting unit 9 passes by the light beam reachability determination unit 10 serving as a light beam reachability determination unit. A search process is performed to search whether or not the ray vector 22 intersects with other surface elements other than the primary light source surface and the primary arrival surface in the middle of tracing the ray vector 22 with only the determination target.

  FIG. 10 shows the relationship between the primary light source surface and the primary arrival surface, and sets a virtual ray vector 22 in which the center points of both surface elements are connected by straight lines to set the target primary from the primary light source surface. An example of determining whether or not the light vector 22 can reach the reaching surface is shown. FIG. 10 shows the relationship between the case of the surface element A that is blocked by another surface element and the surface element B that is not blocked during the course from the start point to the end point of the ray vector 22 emitted from the primary light source surface α. .

  The light ray vector 22 from the primary light source surface α toward the surface element A is blocked by an obstacle 23 composed of other surface elements in the middle of tracing from the start point to the end point. I can't reach it.

  Here, the obstacle 23 is a surface element to which a site attribute (other than the opening) is given by the shape data of the building of the ceiling 30, the partition wall 26, the fitting 29, or the furniture 30 such as furniture or home appliances.

  On the other hand, the light vector 22 from the primary light source surface α toward the surface element B that becomes the primary arrival surface can reach without being blocked by other surface elements on the way.

  FIG. 11 shows a case where the light beam reachability determination unit 10 traces the light vector 22 with only the unit cube or unit cuboid corresponding to the unit space through which the light vector 22 set by the virtual light vector setting unit 9 passes as a determination target. It is a figure explaining the search process which searches whether this ray vector 22 cross | intersects other surface elements other than a primary light source surface and a primary arrival surface. The determination as to whether or not to block the ray vector 22 in the middle of tracing from the start point to the end point of the virtual ray vector 22 set between the surface elements will be described in detail with reference to FIG.

  The search process for a certain primary light source surface is performed in three directions, ie, an X-axis direction surface element, a Y-axis direction element surface, and a Z-axis direction surface element. A description will be given of a case where the surface and other surface elements that block the light vector 22 in the middle are all X-axis direction surface elements.

  First, a unit cube or a unit cuboid corresponding to a unit space to be searched is extracted as a pre-process of the search process. Specifically, only the unit cube or unit cuboid corresponding to the unit space through which the light vector 22 passes is extracted. Thereby, the search process of the unit cube or the unit rectangular parallelepiped corresponding to the unit space through which the light vector 22 does not pass can be omitted, which contributes to the increase in the calculation processing speed.

  Next, the main process of the search process is performed. In the middle of tracing the ray vector 22, there may be an X-axis direction plane element corresponding to the coordinate value represented by the increment represented by the following equation (1). Here, (xs, ys, zs) in the following equation 1 is the coordinate value (representative point coordinate value) of the light source surface that is the start point of the search, and (xt, yt, zt) is the end point of the search. Coordinate values (representative point coordinate values), ΔX, ΔY, and ΔZ of surface elements that are candidates for surfaces are increments of coordinate values on the X, Y, and Z axes, respectively. Int (formula) is a function that changes the result of the formula in () to an integer value.

[Equation 1]
ΔX = 1
ΔY = Int (ΔX × (yt−ys) / (xt−xs))
ΔZ = Int (ΔX × (zt−zs) / (xt−xs))

  In this embodiment, the unit cube is adjusted to the design module size of the building. Therefore, the unit is defined as one module (305 mm) for the coordinate value increment ΔX in the X-axis direction in order to process the surface element in the X-axis direction. To do.

  Then, the coordinate value (X, Y, Z) of the X-axis direction plane element in the search process changes as follows. That is, as shown in FIG. 11A, the coordinate value of the X-axis direction plane element of the unit cube that passes at the beginning of the search process is expressed by the following equation (2). Here, the coordinate values of the reaching surface are X = xt, Y = yt, and Z = zt.

[Equation 2]
X = xs + 1
Y = ys + Int (1 × (yt−ys) / (xt−xs))
Z = zs + Int (1 × (zt−zs) / (xt−xs))

  Further, as shown in FIG. 11B, the coordinate value of the X-axis direction plane element of the unit cube to be passed next is expressed by the following equation (3).

[Equation 3]
X = xs + 2
Y = ys + Int (2 × (yt−ys) / (xt−xs))
Z = zs + Int (2 × (zt−zs) / (xt−xs))

  Further, as shown in FIG. 11 (c), the coordinate value of the X-axis direction plane element of the unit cube that passes next is expressed by the following equation (4).

[Equation 4]
X = xs + 3
Y = ys + Int (3 × (yt−ys) / (xt−xs))
Z = zs + Int (3 × (zt−zs) / (xt−xs))

  In this way, the search process is performed one module at a time until the arrival surface is reached. If there is an X-axis direction surface element having coordinate values that sequentially increase with ΔX, ΔY, and ΔZ, it is determined that there is a surface element that obstructs transmission of the light vector 22.

Then, in step S ₁₁ in FIG. 5, when it determines that failure to become surface element of the transmitted light vectors 22 is present, the procedure proceeds to the determination of step S _12. That is, referring to the site attribute of the surface element, the surface element transmits partly or entirely (0% <transmittance τ ≦ 100%) or completely blocks the light vector 22 (transmittance τ = 0). %).

For example, if the site attribute of the surface element including glass fittings (transmittance τ = 80%), returns to the step S _10, to continue the search process of the same light vector 22. In this case, a process of reducing the light amount value by multiplying the light amount value quoted from the surface element data by the transmittance of 80% is performed. When the search process from the start point to the end point of the light vector 22 is completed by such calculation processing, the light vector 22 is searched for the next candidate arrival surface.

Also, if the site attribute of the surface element is a wall, so completely cut off the light vector 22 (0% transmission tau =), the process returns to step S _7, the next light vectors 22 (same primary light source Search process from the surface to the next candidate primary arrival surface).

  Even in such a search process, since the coordinate value of the surface element data is expressed by an integer value, a special process is not necessary for the determination and the determination is not ambiguous.

This step S ₇ to S ₁₂ is performed for all the primary arrival surface the rays are likely to reach from one primary light source surface. Furthermore, the study of one of the primary light source surface is completed, the flow proceeds to step S _7, performs a sequential processing for light source plane of the next candidate, performs arithmetic processing for all the primary light source surface elements.

  In addition, even if it is a surface element other than an opening such as a floor or a wall, after the light reaches the arrival surface, the arrival surface absorbs part of the light and radiates again although the light quantity value is attenuated ( In the present invention, this has a light quantity value (referred to as “reflection”). That is, it is recognized as a light source surface having the radiated light amount value.

Thus, sequentially performs a search process shown in step S ₇ to S _12, when it reaches the arrival surface, i.e. it is determined that it is not the light beam is interrupted, operation process, after the next step S ₁₃ move on.

  According to this procedure, the calculation processing for setting a large amount of light rays simulating radiation from the light source surface element as in the conventional example described above is unnecessary, and stable calculation can be realized.

Then, the process proceeds to step S ₁₃ to S ₁₅ for calculating a light intensity value. Here, the reaching surface light amount value calculating unit 11 serving as the reaching surface light amount value calculating unit has the light beam vector 22 set by the light source surface light amount value setting unit 8 by the light beam reachability determining unit 10 serving as the light beam reachability determining unit. When it is determined that the target primary arrival surface can be reached from the secondary light source surface, the primary arrival surface has reached the primary light source surface from the outside of the building set by the light source surface light quantity value setting unit 8. The light quantity value obtained by multiplying the light quantity value by the aperture transmittance of the primary light source surface is used as the initial radiant light quantity value of the primary light source surface, other than the primary light source surface and the primary arrival surface where the light vector 22 intersects. The amount of light reaching the primary arrival surface from the primary light source surface is calculated in consideration of the transmittance of the surface element, and the ray vector 22 set by the virtual ray vector setting unit 9 by the ray reachability determination unit 10 is the primary. If the target primary arrival surface cannot be reached from the light source surface If it is determined, from the primary light source surface to the next candidate primary arrival surface, the above-described third processing by the virtual ray vector setting unit 9 and the above-described fourth processing by the ray reachability determination unit 10 are performed. The ray vector 22 set by the virtual ray vector setting unit 9 by the ray arrival possibility determination unit 10 by the arrival surface light amount value calculation unit 11 is sequentially executed and can reach the target primary arrival surface from the primary light source surface. For the determined primary arrival surface, the light beam vector 22 intersects with the light amount value given to the primary light source surface by the light source surface light amount value setting unit 8 as the initial radiant light amount value of the primary light source surface. A light amount value reaching the primary arrival surface from the primary light source surface is calculated in consideration of the transmittance of other surface elements other than the light source surface and the primary arrival surface.

In step S _13, when determining the arrival quantity value to reach surfaces, a surface element as a light source, the following equation 5 formulas geometric relationship between the surface elements that are arriving candidate view factor F Ask. FIG. 12 shows an example of how to obtain the form factor F, where L is the length of the ray vector 22, α is the plane containing the start point of the ray vector 22, and the X and Y axes. The angle formed between the plane including the start point of the ray vector 22 and the ray vector 22 when projected onto the parallel plane from the Z-axis direction, β is the plane including the end point of the ray vector 22 and including the X axis and the Z axis. An angle formed by the plane including the end point of the ray vector 22 and the ray vector 22 when projected onto the parallel plane from the Y-axis direction, A is the area of the surface element. The surface element that the light source surface element reaches by the wall element in the X-axis direction is also the case of the wall element in the X-axis direction. The form factor F is a dimensionless quantity.

[Equation 5]
F = cos α × cos β × A / L ² / π
cos α = | Xs−Xt | / L
cos β = | Xs−Xt | / L
L = {(Xs−Xt) ² + (Ys−Yt) ² + (Zs−Zt) ² } ^1/2

In step S _14, it is calculated by equation (6) the amount obtained by multiplying the emission light quantity value is less than the light quantity value reaches the surface element that reaches from the light source surface to the view factor F determined by the number 5 type. In the following Expression 6, α is an initial value of the light amount value of the n (n = 1, 2, 3,...) Next light source surface.

[Equation 6]
Amount of light reaching surface = α × F

Then, stored in step S _15, the arrival quantity value calculated by the arrival surface light quantity value calculation unit 11, by reaching surface light amount value storage unit 12 composed of the arrival surface light quantity value storing means to the surface element data according to the primary reach surface As a result, the light quantity value calculation processing is completed.

  Here, the arrival surface light amount value storage unit 12 serving as the arrival surface light amount value storage means sets the virtual ray vector from the primary light source surface searched in the above-described fifth process to the next candidate primary arrival surface. The above-described third process by the unit 9, the above-described fourth process by the light beam arrival / absence determination unit 10, and the above-described fifth process by the arrival surface light amount value calculation unit 11 are sequentially executed, and all candidates are obtained. The light quantity values reaching all the primary arrival surfaces as candidates from the primary light source surface calculated in the above-described fifth process with respect to the primary arrival surface are related to all the primary arrival surfaces as candidates. Store in the surface element data.

  Then, the reaching surface light amount value storage unit 12 adds the light amount value given from the primary light source surface of the next candidate to the light amount values of the surface element data related to all the primary reaching surfaces as candidates, and becomes a candidate. Update and store the surface element data related to all primary arrival surfaces. As a result, the calculation processing for calculating the light amount value of one arrival surface with respect to one light source surface is completed.

In step S _16, it determines the presence or absence of a candidate to arrive for the same light source plane. In step S _16, yet, if there is a candidate of the arrival surface, returns to the step S _7, the process of step S ₇ to S ₁₆ for all of the arrival surface elements that are candidates for the same light source plane. By reaching surface light quantity value storing unit 12 as the arrival plane light amount value storage means said step S ₁₅ in the foregoing, the surface element data according to the primary reach surface, adding the light intensity value granted from the primary light source surface of the next candidate Then, the surface element data is updated and stored.

  FIG. 13 shows the state of calculation processing in which the light vector 22 arrives at a plurality of candidate arrival surfaces A, B, and C from the light source surface α and the light quantity value is given when focusing on one light source surface α. This situation is a simulation of a situation in which light rays are “radiated” from one light source surface in all directions on a computer. This procedure simulates the radiation of light rays from the surface elements of the light source surface to each arrival surface (diffuses in all directions), and does not require computation processing to set an unnecessarily large number of light rays. Calculation can be realized.

In steps S _{7 to} S ₁₆ in FIG. 5, the virtual light vector setting unit 9 serving as a virtual light vector setting unit and a light reachability determination unit are provided from the same primary light source surface to the next candidate primary arrival surface. The light beam reachability determination unit 10 and the arrival surface light amount value calculation unit 11 serving as the arrival surface light amount value calculation unit sequentially execute the respective calculation processes to obtain light amount values for all the primary arrival surfaces that are candidates. after storing the data, in step S _17, checking whether the primary light source surface to be next processing there.

  FIG. 14 is a diagram showing a state of calculation processing in which a light vector 22 reaches a single arrival surface A from a plurality of light source surfaces α, β, and γ and a light amount value is given.

Further, in step S _17, when the primary light source plane of the next candidate is present, perform the same processing as described above (step S ₇ to S ₁₇ in FIG. 5). Then, the calculation processing for all the primary light source surface if completed, the process ends in step S ₆ in FIG.

In step S ₁₈ of FIG. 4, a step of face elements given light quantity reaching the arrival surface emits light. In step S ₁₈ , the reaching surface further reflects the amount of light received by the reaching surface (hereinafter referred to as “primary reaching surface”) from the light source surface (hereinafter referred to as “primary light source surface”) such as the so-called opening 19. A calculation process is performed in the case of radiating to another arrival surface by the emitted light.

  Here, “reflected light” refers to light that radiates to a reaching surface other than the reaching surface a light amount value obtained by multiplying the light amount value of a light beam reaching a certain reaching surface by the diffusion emissivity of the reaching surface. That is, in the light environment analysis program and the light environment analysis apparatus according to the present invention, a part of the reaching light amount value of the reaching surface is absorbed by the reaching surface, and the rest recognizes the reaching surface as the light source surface and emits it. It will be.

In step S ₁₈ , a calculation process is performed by the light environment analysis program according to claim 3. In other words, the light quantity value reflected from the primary arrival surface is used as the secondary light source surface, and the radiation light amount value to the secondary arrival surface is calculated. The arrival surface light amount value calculation unit 11 serving as the arrival surface light amount value calculation means multiplies the amount of light reached from the primary light source surface obtained by the arrival means by the diffusion emissivity of the primary arrival surface to achieve the primary arrival. The initial value of the light amount value emitted from the surface as a secondary light source is used.

As described above, since the primary arrival surface that reflects the light received from the primary light source surface is naturally not the primary light source surface, all of them are candidates for the secondary light source surface. The calculation process of the amount of light reaching the secondary arrival surface from the secondary light source surface employs the same procedure as steps S _{7 to} S ₁₇ shown in FIG. 5 described above, and detailed description thereof is omitted here.

FIG. 15 shows an example of the processing of steps S ₁₈ and S _{7 to} S ₁₇ . In this example, first, the coordinate value (d, e, f) of the surface element data of the primary arrival surface A receives the light quantity from the coordinate value (a, b, c) of the surface element data of the primary light source surface α. In this example, the primary arrival surface A (d, e, f) serves as a secondary light source surface and radiates to the secondary arrival surface B which is another surface element.

Light quantity value of the secondary reaches surface calculated in this way is added to the arrival surface by reaching surface light quantity value storing unit 12 as the arrival plane light amount value storage means in step S ₁₅ that flows from step S ₆ described above Stored in the surface element data as update data. Further, the calculation processing of steps S ₁₈ and S _{7 to} S ₁₇ is performed as a tertiary light source surface based on the light amount value of the secondary arrival surface.

In step S ₁₉ of FIG. 4, the radiation beam from such a light source surface, by repeating the calculation and addition of the arrival quantity value to reach surfaces to seek the arrival quantity value to reach surfaces. That is, a light source surface light amount value setting unit 8 serving as a light source surface light amount value setting unit, a virtual ray vector setting unit 9 serving as a virtual ray vector setting unit, a light beam reachability determining unit 10 serving as a light ray reachability determining unit, and a reaching surface light amount value. Execute the respective calculation processing by the arrival surface light amount value calculation unit 11 serving as the calculation means and the arrival surface light amount value storage unit 12 serving as the arrival surface light amount value storage means in order to add the arrival light amount value to the arrival surface, The surface element data is updated.

  Then, the final light quantity value storage unit 13 serving as the final light quantity value storage means calculates the light quantity value when the light quantity value added from the (n + 1) -order light source surface to the (n + 1) -order arrival surface reaches a predetermined reference. The final light quantity value of the surface element is stored in the surface element data.

The amount of light emitted at this time is abruptly attenuated while repeating the absorption and emission to the arrival surface, and the amount of light reaching the sum almost reached the saturation value by repeating the procedure several times. That is, if the state does not exceed the amount of change previously determined by comparing summed before and the after the addition of the light quantity value calculated in reaching surface light quantity value calculation unit 11 as a reaching surface light quantity value calculation means in Step S ₁₅ The calculation is terminated (step S _{19 in} FIG. 4).

  By the way, the luminance distribution can be regarded as the presence distribution of the light quantity, and it is important to display the distribution of the light quantity value for each unit space in order to see the brightness distribution of the internal space of the building.

  Therefore, the light environment analysis apparatus according to the present invention is finally stored in the surface element data of each surface element of the unit cube or the unit rectangular parallelepiped corresponding to the unit space of the internal space composed of the shape data of the building to be evaluated. There is provided a light amount value display unit 14 serving as a light amount display means for displaying a final reached light amount value for each unit space of the internal space of the building based on the reached light amount value. Here, the internal space of the building means a three-dimensional solid including a cube and a rectangular parallelepiped formed by the floor 28, the walls (outer wall 27, partition wall 26), and the ceiling.

  In addition, the light quantity value display unit 14 is provided for each area divided into a grid based on a unit cube or a unit rectangular parallelepiped corresponding to the unit space of the internal space constituted by the shape data of the building to be evaluated. Displays the final light intensity value for each unit space of the internal space.

  The light quantity value display unit 14 uses the final reached light quantity value data stored in each surface element data of a unit cube or a unit rectangular parallelepiped corresponding to the unit space.

  For example, the final reached light quantity value data stored in each surface element data of the unit cube or the unit rectangular parallelepiped corresponding to the unit space is referred to as the display light quantity value as it is.

  That is, the light amount value for display on the floor 28 refers to the final reached light amount value data of the Z-axis direction surface element on the coordinate axis, and the light amount value for display on the wall surface is the X-axis direction surface element or the Y-axis direction surface element The final reached light quantity value data is quoted.

  Also, the unit cube or unit cuboid is represented by adding final arrival light quantity value data to the surface element data of the surface element in the X axis, Y axis, and Z axis directions of the unit cube or unit cuboid corresponding to the unit space. One display data may be used.

  The light amount value display unit 14 refers to the reference data for display of the unit cube or unit cuboid corresponding to the unit space, collates with the reference data for display, and for each unit cube or unit cuboid corresponding to the unit space, The light quantity value to be displayed is determined and the display element is displayed on the screen. It is also possible to print on paper or the like by the printing function of the printer 25 or the like.

  Here, FIG. 19 shows display reference data. The reference data for display is a correspondence table between light quantity values (or light quantity value ranges) and display elements. The display element defines values such as color (combination of RGB gradations), symbols, figures, characters, and the like.

  That is, according to the surface pixel data shown in FIG. 19A and according to the color in the case where the light quantity value of the surface pixel data is included in a preset threshold range in FIG. A predetermined numerical value is given. For example, the light quantity value data of the # 1 plane pixel in FIG. 19A is “1.8”, and the light quantity value “1.8” is the threshold “1.0” shown in FIG. 19B. Since it is within the range of <1.8 ≦ 2.0, “R = 0”, “G = 0”, and “B = 42850” are used as color expressions as combinations of R (red), G (green), and B (blue) values. It is selected and created as a color representation of the surface element display represented as shown in FIG. 19C, and the color is displayed as shown in FIGS. 16 and 17 are actually color displays.

  In addition, since the light quantity value display unit 14 can display for each unit cube or unit rectangular parallelepiped corresponding to the unit space, the floor plan of the building displayed in a plan view, a sectional view, etc. is a unit corresponding to the unit space. The brightness distribution can be displayed by assigning display elements to each of the grid-divided areas (grids) according to the cube or unit cuboid (matching the grid based on the building design module dimensions). .

  FIG. 16 is a display example of brightness distribution by the brightness display unit 17. By dividing the surface elements into a grid pattern in the floor plan shown in Fig. 16 and giving the light quantity value there, it is possible to look down on the interior of the building in units of floors. It is possible to display such that you can look down.

  In the example of FIG. 16, there is no setting of the opening 19 on the wall near the staircase portion 24, and it can be displayed that the front periphery of the staircase portion 24 is entirely dark.

  In FIG. 17, since the opening 19 is set in the wall near the staircase 24 shown in the upper left part of the figure, the front periphery of the staircase 24 is slightly bright as a whole.

  The display in FIGS. 16 and 17 is a horizontal sectional view of the first floor portion of the building. Although not understood only by this drawing, an opening 19 (not shown) is set in the second floor portion of the staircase portion 24. Due to this effect, a slight brightness is recognized around the staircase 24. Such a result can be obtained for the first time by displaying the entire floor in a bird's-eye view and analyzing the entire building as an object of analysis, and explain the brightness distribution in the floor plan by the opening 19.

  In the light environment analysis apparatus according to the present invention, the measurement surface element setting unit 15 serving as a measurement surface element setting means for setting the measurement surface element at a predetermined position on the coordinate axis of the shape data of the building to be evaluated, and claim The final light amount values of all the surface elements calculated by the final light amount value storage unit 13 serving as the final light amount value storage means described in Item 8 and the opening surface 20 described in Claim 6 or Claim 7 Brightness to calculate the brightness on the measurement surface element set by the measurement surface element setting unit 15 using the light quantity value stored in the surface element data relating to the primary light source surface as the surface element of the light source as the light source A brightness calculation unit 16 serving as a calculation means, and a brightness display unit 17 serving as a brightness display means for displaying the brightness on the measurement surface element calculated by the brightness calculation unit 16; The measurement surface element set by the element setting unit 15 is the shape of the building to be evaluated. It is set on a horizontal plane of a certain height from the floor 28 composed of the shape data.

  FIG. 18 is an example of an input screen of the measurement surface element setting unit 15. In FIG. 18, brightness is set to be displayed at a height of 1200 mm from the floor 28 of the second floor of the internal space of the building. Thus, by selecting the horizontal direction of the measurement index, the brightness distribution calculated by the brightness calculation unit 16 can be shown as a horizontal plane light quantity value on a virtual plane at a certain height from the floor 28 surface. The stairway sharing space is a selection of whether to display the floor (first floor) where the staircase exit is located or to display the floor (second floor) where the stairway exit is located.

  16 and 17 use the final light intensity value stored in the surface element data of the unit cube or unit cuboid corresponding to the unit space for the internal space composed of the building shape data. Instead, a virtual surface element is set at a certain height from the surface of the floor 28, and the amount of light finally reaching the surface element is individually calculated.

  In this case, the light quantity value calculation process reaches the virtual surface element set by the measurement surface element setting unit 15 from the n (n = 1, 2, 3,...) Next light source surface calculated as described above. Use the light intensity value.

  On the other hand, for example, when recognizing the brightness at the entrance, it is imagined that the brightness is judged based on the brightness distribution when the entire entrance is viewed. Similarly, it can be estimated that the vicinity of the staircase 24 is judged to be bright or dark when the entire periphery of the staircase 24 is viewed.

  Then, it is presumed that the expression of the horizontal plane illuminance at an appropriate height is insufficient, and the expression including the illuminance on the vertical plane including the spread is necessary.

  FIG. 18 shows an example of a screen of display height setting means that becomes the measurement surface element setting unit 15. In Fig. 18, the display is set to a height of 1200mm from the 28th floor of the second floor, and by selecting the horizontal or horizontal / vertical direction as the measurement index, the virtual plane at a certain height from the 28th floor is selected. A horizontal plane light quantity value or a value obtained by combining a horizontal plane light quantity value and a vertical plane light quantity value at the same height can be displayed.

  Also in this case, the light amount value used for display is not from the final reached light amount value data stored in the surface element data of the unit cube or unit rectangular parallelepiped corresponding to the unit space described above, but from the floor 28 surface. A virtual surface element is set at a certain height, and a light amount value finally reaching the surface element is individually calculated.

  Further, in the light quantity value calculation processing, any one of the light environment analysis programs described in claims 1 to 5 is used, and the virtual light source surface is calculated from the calculated n (n = 1, 2, 3,...) Next light source surface. Use the amount of light that reaches the surface element.

  As an example of use of the present invention, it can be used for light environment simulation of indoor brightness distribution using the light amount value of the interior space of the building, or in the cabin or in the vehicle using the light amount value of the interior space of an airplane or a car. It can also be applied to the light environment simulation of the brightness distribution.

It is a figure which shows an example of the external appearance of the optical environment analysis apparatus which concerns on this invention. It is a block diagram explaining the structure of the control system of the optical environment analyzer which concerns on this invention. (A), (b) is the perspective view and top view which express an example of the floor plan of the evaluation object building with a CAD drawing. It is a flowchart which shows an example of the arithmetic processing by the program for light environment analysis which concerns on this invention. Is a flowchart showing details of step _S 6, S ₁₈ in FIG. It is a figure which shows an example of the shape data of the building used as analysis object. It is an image figure of the analysis space of the building of evaluation object. It is a figure which shows the relationship between the unit cube which comprises the internal space of the building of evaluation object, and a surface element. It is a figure which shows a mode that visibility determination is performed from the magnitude relationship on the coordinate axis of a light source surface element and a light ray arrival candidate surface. It is a figure which shows a mode that the light ray radiated | emitted from the light source surface element reaches | attains a reach | attainment surface element, and a mode that it interrupts | blocks by another surface element on the way. (A)-(c) is a conceptual explanatory drawing explaining the principle which judges whether the light ray radiated | emitted from the light source surface element arrives at an arrival surface element. It is a conceptual explanatory diagram explaining how to obtain a form factor when the light source surface element is the X-axis direction wall element of the coordinate axis and the reaching surface candidate is also the X-axis direction wall element. It is a figure which shows a mode that a emitted light ray reaches | attains a several arrival surface from a light source surface, and a light quantity value is given. It is a figure which shows a mode that the emitted light from a several light source surface arrives at the same arrival surface, and a light quantity value is added. It is a figure which shows a mode that a light ray reaches | attains another arrival surface again, when the light ray which reached | attained the surface element radiates | emits. It is a figure which shows an example which displayed the brightness distribution of the 1st floor part of the building where the opening part is not set near the stairs front. It is a figure which shows an example which displayed the brightness distribution of the 1st floor part of the building in which the opening part is set near the stairs front. It is a figure which shows the input screen for the setting of the surface element setting means for a measurement. (A)-(c) is a figure which shows an example of surface element data.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Control apparatus 2 ... Display 3 ... Keyboard 4 ... Mouse 5 ... Building information acquisition part 6 ... Plane element data structure part 7 ... Building shape information DB
8 ... Light source surface light quantity value setting unit 9 ... Virtual ray vector setting unit
10: Ray reachability determination unit
11: Achieving surface light quantity value calculation unit
12 ... Area light quantity value storage
13 ... Final light intensity value storage
14… Light intensity display
15… Measurement surface element setting section
16 ... Brightness calculator
17 ... Brightness display
18 ... Memory
19 ... Opening
20 ... Opening surface
21 ... surface element light quantity information DB
22 ... Ray vector
23. Obstacle
24… Staircase
25 ... Printer
26 ... partition wall
27… Outer wall
28… Floor
29 ... Joinery
30… Furniture or home appliances

Claims (14)

Based on the shape data of the building to be evaluated acquired by the building information acquisition means,
The surface element data constituting means divides the internal space constituted by the shape data of the building into unit cubes or unit cuboids corresponding to the unit space, and each surface element of the unit cube or unit cuboid is stored in the shape data of the building. A surface element corresponding to the opening is divided into an opening surface and a surface other than the opening corresponding to a portion other than the opening, and coordinates and attribute data are assigned to the surface element data. A first process to store;
The light source surface light quantity value setting means recognizes the opening surface as a primary light source surface serving as a surface element of the light source, and is a surface element that allows light rays to reach the surfaces other than the opening from the primary light source surface. A second process of recognizing as the next arrival surface and storing the light amount value reaching the primary light source surface from the outside of the building in the surface element data relating to the primary light source surface;
A third process of setting a light vector from the primary light source surface to the primary arrival surface by a virtual light vector setting means;
The ray vector set by the virtual ray vector setting unit is set as a determination target by the ray reachability determination unit only for a unit cube or a unit cuboid corresponding to the unit space through which the ray vector set by the virtual ray vector setting unit passes. In the course of tracing, by searching for whether the ray vector intersects the surface element other than the primary light source surface and the primary arrival surface, the primary light source surface to the target primary arrival surface is searched. A fourth process for determining whether or not a ray vector is reachable;
When it is determined by the arrival surface light quantity value calculation means that the light ray vector set by the virtual light ray vector setting means is reachable from the primary light source surface to the target primary arrival surface by the light ray reachability determination means. For the primary arrival surface, a light amount value obtained by multiplying the light amount value that has reached the primary light source surface from the outside of the building set by the light source surface light amount value setting means and the opening transmittance of the primary light source surface is Considering the transmittance of the primary light source surface other than the primary light source surface and the primary arrival surface where the light vector intersects as the initial radiant light amount value of the primary light source surface, the primary light source surface from the primary light source surface Calculate the amount of light reaching the arrival surface,
When the light beam reachability determining means determines that the light beam vector set by the virtual light beam vector setting means cannot reach the target primary arrival surface from the primary light source surface, The third process by the virtual ray vector setting unit and the fourth process by the ray reachability determination unit are sequentially executed on the next candidate primary arrival surface, and the arrival surface light amount value calculating unit The light source that has been determined by the light ray reachability determining means that the light vector set by the virtual light vector setting means is reachable from the primary light source surface to the target primary arrival surface is the light source. The primary light source surface intersecting the light beam vector and the first light amount value given to the primary light source surface by the surface light amount value setting means as the initial radiant light amount value of the primary arrival surface A fifth processing of calculating a light intensity value reaching the primary reaching surface from said primary light source surface in consideration of the transmittance of the other surface element other than reaching surface,
A light amount value reaching the primary arrival surface from the primary light source surface calculated in the fifth process is stored in the surface element data relating to the primary arrival surface by a reaching surface light amount value storage means. Processing,
The light amount value given from the primary light source surface of the next candidate is added to the light amount value of the surface element data related to the primary arrival surface by the arrival surface light amount value storage means, and the surface element related to the primary arrival surface A seventh process for updating and storing data;
A program for analyzing the light environment characterized by Based on the shape data of the building to be evaluated acquired by the building information acquisition means,
The surface element data constituting means divides the internal space constituted by the shape data of the building into unit cubes or unit cuboids corresponding to the unit space, and each surface element of the unit cube or unit cuboid is stored in the shape data of the building. A surface element corresponding to the opening is divided into an opening surface and a surface other than the opening corresponding to a portion other than the opening, and coordinates and attribute data are assigned to the surface element data. A first process to store;
The light source surface light quantity value setting means recognizes the opening surface as a primary light source surface serving as a surface element of the light source, and is a surface element that allows light rays to reach the surfaces other than the opening from the primary light source surface. A second process of recognizing as the next arrival surface and storing the light amount value reaching the primary light source surface from the outside of the building in the surface element data relating to the primary light source surface;
A third process of setting a light vector from the primary light source surface to the primary arrival surface by a virtual light vector setting means;
The ray vector set by the virtual ray vector setting unit is set as a determination target by the ray reachability determination unit only for a unit cube or a unit cuboid corresponding to the unit space through which the ray vector set by the virtual ray vector setting unit passes. In the course of tracing, by searching for whether the ray vector intersects the surface element other than the primary light source surface and the primary arrival surface, the primary light source surface to the target primary arrival surface is searched. A fourth process for determining whether or not a ray vector is reachable;
When it is determined by the arrival surface light quantity value calculation means that the light ray vector set by the virtual light ray vector setting means is reachable from the primary light source surface to the target primary arrival surface by the light ray reachability determination means. For the primary arrival surface, a light amount value obtained by multiplying the light amount value that has reached the primary light source surface from the outside of the building set by the light source surface light amount value setting means and the opening transmittance of the primary light source surface is Considering the transmittance of the primary light source surface other than the primary light source surface and the primary arrival surface where the light vector intersects as the initial radiant light amount value of the primary light source surface, the primary light source surface from the primary light source surface Calculate the amount of light reaching the arrival surface,
When the light beam reachability determining means determines that the light beam vector set by the virtual light beam vector setting means cannot reach the target primary arrival surface from the primary light source surface, The third process by the virtual ray vector setting unit and the fourth process by the ray reachability determination unit are sequentially executed on the next candidate primary arrival surface, and the arrival surface light amount value calculating unit The light source that has been determined by the light beam reachability determination unit that the light beam vector set by the virtual light beam vector setting unit is reachable from the primary light source surface to the target primary arrival surface is the light source. The primary light source surface intersecting the light vector and the primary arrival light amount value given to the primary light source surface by the surface light amount value setting means are used as the initial radiation light amount value of the primary light source surface. A fifth processing of calculating a light intensity value in consideration of the transmittance of the other surface element other than the surface to reach the primary reaching surface from said primary light source surface,
From the primary light source surface searched in the fifth process to the next candidate primary arrival surface by the arrival surface light amount storage means, the third process by the virtual ray vector setting means, the ray arrival The fourth process by the availability determining unit and the fifth process by the reaching surface light amount value calculating unit are sequentially executed, and the fifth process is calculated for all candidate primary reaching surfaces. A sixth process for storing light quantity values reaching all of the candidate primary arrival surfaces from the primary light source surface in surface element data relating to all of the candidate primary arrival surfaces;
The reaching surface light amount value storage means adds the light amount value given from the primary light source surface of the next candidate to the light amount values of the surface element data related to all the primary reaching surfaces that are candidates, and becomes the candidate. A seventh process of updating and storing the surface element data relating to all primary arrival surfaces;
A program for analyzing the light environment characterized by The opening surface is used as a primary light source surface serving as a surface element of the light source, and when the light beam reaches the target primary arrival surface from the primary light source surface, the light beam is reflected on the primary arrival surface. The secondary arrival surface is defined as a secondary light source surface, and when the light beam is reflected from the secondary light source surface to another target secondary arrival surface and then reflected to the secondary arrival surface, the secondary arrival surface is defined as 3 After the light rays reach the target n (n = 1, 2, 3,...) Next arrival surface sequentially set as the next light source surface, the nth order. In the case where light rays are reflected from the arrival surface toward an arrival surface other than the nth order arrival surface,
In the second processing, the light source surface light amount value setting means recognizes the nth order reaching surface as the (n + 1) th order light source surface, and a reaching surface other than the nth order reaching surface is transmitted from the (n + 1) th order light source surface. Recognizing it as a reachable (n + 1) -order arrival surface, and setting the light amount value stored in the surface element data relating to the n-order arrival surface as the light amount value of the (n + 1) -order light source surface;
In the third process, a ray vector is set from the (n + 1) th order light source surface to the (n + 1) th order arrival surface by the virtual ray vector setting means,
In the fourth process, the light ray reachability determining means sets the virtual light vector setting with only a unit cube or a unit cuboid corresponding to the unit space through which the light vector set by the virtual light vector setting means passes as a determination target. In the course of tracing the ray vector set by the means, the ray vector is searched for whether it intersects with other surface elements other than the (n + 1) th order light source surface and the (n + 1) th order arrival surface. n + 1) It is determined whether or not the target (n + 1) next arrival surface can be reached from the next light source surface,
In the fifth processing, the ray vector set by the virtual ray vector setting unit by the ray arrival reachability determining unit is changed from the (n + 1) th order light source surface to the target (n + 1) th order reach surface by the arrival surface light amount value calculating unit. For the (n + 1) th order reaching surface determined to be reachable, the light amount value obtained by multiplying the light amount value reaching the nth order reaching surface from the nth order light source surface by the diffuse emissivity of the nth order reaching surface is ( (n + 1) As the initial radiant light amount value of the next light source surface, the transmittance of the other surface elements other than the (n + 1) th order light source surface and the (n + 1) th order arrival surface intersecting with the light vector is taken into consideration (n + 1). A light amount value reaching the (n + 1) next arrival surface from the next light source surface is calculated,
In the seventh process, the reaching surface light quantity value storage means adds the next candidate (n + 1) to the light quantity value of the surface element data relating to the (n + 1) th next reaching face or all the (n + 1) th next reaching faces. The light amount value given from the next light source surface is added, and the surface element data relating to the (n + 1) next arrival surface or all candidate (n + 1) next arrival surfaces is updated and stored,
The final light quantity value storage means causes the second process by the light source surface light quantity value setting means, the third process by the virtual light vector setting means, the fourth process by the light ray reachability determination means, and the arrival. The fifth process by the surface light quantity value calculating means and the sixth and seventh processes by the reaching face light quantity value storing means are sequentially executed, and the (n + 1) th next reach surface from the (n + 1) th light source surface. 8. The eighth process of storing the light quantity value when the light quantity value to be added to the predetermined reference value is stored in the surface element data as the final light quantity value of the surface element. Item 3. The light environment analysis program according to Item 2. The fourth process by the light ray arrival / absence determination means is performed by the light beam from the n (n = 1, 2, 3,...) Next light source surface to the n (n = 1, 2, 3,. The calculation process for determining whether the n-order light source surface and the n-order arrival surface are visible from the magnitude relationship on the coordinate axes when determining reachability is included. 4. The light environment analysis program according to any one of 3 above. The unit cube or unit cuboid corresponding to the unit space of the internal space constituted by the building shape data is a unit cube or unit cuboid based on the design module dimensions of the building. The light environment analysis program according to claim 1. Building information acquisition means for acquiring shape data of the building to be evaluated;
Based on the building shape data acquired by the building information acquisition means, the internal space constituted by the building shape data is divided into unit cubes or unit cuboids corresponding to unit spaces, and each of the unit cubes or unit cuboids is divided. Coordinates and attributes are obtained by classifying the surface element into an opening surface that is a surface element corresponding to the opening of the shape data of the building and a surface other than the opening that is a surface element corresponding to a part other than the opening. A surface element data construction means for assigning data and storing it in the surface element data;
Recognizing the opening surface as a primary light source surface serving as a surface element of a light source, and recognizing a surface other than the opening as a primary arrival surface that is a surface element that a light beam can reach from the primary light source surface; A light source surface light amount value setting means for storing a light amount value reaching the primary light source surface from the outside of the building in surface element data relating to the primary light source surface;
Virtual ray vector setting means for setting a ray vector from the primary light source surface to the primary arrival surface;
In the course of tracing the ray vector set by the virtual ray vector setting unit, only the unit cube or unit cuboid corresponding to the unit space through which the ray vector set by the virtual ray vector setting unit passes is determined. Whether or not a light vector can reach the target primary arrival surface from the primary light source surface by searching whether or not the surface element other than the primary light source surface and the primary arrival surface A ray reachability determination means for determining whether or not
When it is determined by the light beam reachability determining means that the light vector set by the virtual light beam vector setting means is reachable from the primary light source surface to the target primary arrival surface, for the primary arrival surface, A light amount value obtained by multiplying the light amount value reaching the primary light source surface from the outside of the building set by the light source surface light amount value setting means by the transmittance of the opening of the primary light source surface is an initial radiant light amount of the primary light source surface. As a value, a light amount value reaching the primary arrival surface from the primary light source surface in consideration of the transmittance of the surface element other than the primary light source surface and the primary arrival surface where the light vector intersects. Calculate
When the light beam reachability determining means determines that the light beam vector set by the virtual light beam vector setting means cannot reach the target primary arrival surface from the primary light source surface, The virtual ray vector setting means and the ray reachability determination means sequentially execute respective calculation processes on the next candidate primary arrival surface, and the ray reachability determination means causes the virtual ray vector setting means to The set light vector is given to the primary light source surface by the light source surface light quantity value setting means for the primary arrival surface determined to be reachable from the primary light source surface to the target primary arrival surface. Taking the light quantity value as the initial radiant light quantity value of the primary light source surface, the transmittance of the other surface elements other than the primary light source surface and the primary arrival surface intersecting the light vector is considered. And reaches surface light quantity value calculation means for calculating a light quantity value reaches the primary arriving plane from the primary light source surface,
A reaching surface light amount value storing means for storing a light amount value reaching the primary reaching surface from the primary light source surface calculated by the reaching surface light amount value calculating means in surface element data relating to the primary reaching surface;
A light environment analyzing apparatus comprising: Building information acquisition means for acquiring shape data of the building to be evaluated;
Based on the building shape data acquired by the building information acquisition means, the internal space constituted by the building shape data is divided into unit cubes or unit cuboids corresponding to unit spaces, and each of the unit cubes or unit cuboids is divided. Coordinates and attributes are obtained by classifying the surface element into an opening surface that is a surface element corresponding to the opening of the shape data of the building and a surface other than the opening that is a surface element corresponding to a part other than the opening. A surface element data construction means for assigning data and storing it in the surface element data;
Recognizing the opening surface as a primary light source surface serving as a surface element of a light source, and recognizing a surface other than the opening as a primary arrival surface that is a surface element that a light beam can reach from the primary light source surface; A light source surface light amount value setting means for storing a light amount value reaching the primary light source surface from the outside of the building in surface element data relating to the primary light source surface;
Virtual ray vector setting means for setting a ray vector from the primary light source surface to the primary arrival surface;
In the course of tracing the ray vector set by the virtual ray vector setting unit, only the unit cube or unit cuboid corresponding to the unit space through which the ray vector set by the virtual ray vector setting unit passes is determined. Whether or not a light vector can reach the target primary arrival surface from the primary light source surface by searching whether or not the surface element other than the primary light source surface and the primary arrival surface A ray reachability determination means for determining whether or not
When it is determined by the light beam reachability determining means that the light vector set by the virtual light beam vector setting means is reachable from the primary light source surface to the target primary arrival surface, for the primary arrival surface, A light amount value obtained by multiplying the light amount value reaching the primary light source surface from the outside of the building set by the light source surface light amount value setting means by the transmittance of the opening of the primary light source surface is an initial radiant light amount of the primary light source surface. As a value, a light amount value reaching the primary arrival surface from the primary light source surface in consideration of the transmittance of the surface element other than the primary light source surface and the primary arrival surface where the light vector intersects. Calculate
When the light beam reachability determining means determines that the light beam vector set by the virtual light beam vector setting means cannot reach the target primary arrival surface from the primary light source surface, The virtual ray vector setting means and the ray reachability determination means sequentially execute respective calculation processes on the next candidate primary arrival surface, and the ray reachability determination means causes the virtual ray vector setting means to The set light vector is given to the primary light source surface by the light source surface light quantity value setting means for the primary arrival surface determined to be reachable from the primary light source surface to the target primary arrival surface. Taking the light quantity value as the initial radiant light quantity value of the primary light source surface, the transmittance of the other surface elements other than the primary light source surface and the primary arrival surface intersecting the light vector is considered. And reaches surface light quantity value calculation means for calculating a light quantity value reaches the primary arriving plane from the primary light source surface,
From the primary light source surface calculated by the arrival surface light amount value calculation means to the next candidate primary arrival surface, the virtual ray vector setting means, the light ray reachability determination means, and the arrival surface light amount value calculation means All of the primary reaching surfaces that are candidates from the primary light source surface calculated by the reaching surface light amount value calculating unit for all the primary reaching surfaces that are candidates are sequentially executed by Are stored in the surface element data related to all the primary arrival surfaces that are candidates, and the light amount values of the surface element data related to all the primary arrival surfaces that are candidates are Reaching surface light amount value storage means for adding the light amount values given from the primary light source surface and updating and storing the surface element data relating to all the primary reaching surfaces as candidates;
A light environment analyzing apparatus comprising: The opening surface is used as a primary light source surface serving as a surface element of the light source, and when the light beam reaches the target primary arrival surface from the primary light source surface, the light beam is reflected on the primary arrival surface. The secondary arrival surface is defined as a secondary light source surface, and when the light beam is reflected from the secondary light source surface to another target secondary arrival surface and then reflected to the secondary arrival surface, the secondary arrival surface is defined as 3 After the light rays reach the target n (n = 1, 2, 3,...) Next arrival surface sequentially set as the next light source surface, the nth order. In the case where light rays are reflected from the arrival surface toward an arrival surface other than the nth order arrival surface,
The light source surface light quantity value setting means recognizes the nth order reaching surface as the (n + 1) th order light source surface and allows a light beam to reach a reaching surface other than the nth order reaching surface from the (n + 1) th order light source surface (n + 1). Recognizing as the next arrival surface, the light amount value stored in the surface element data related to the nth arrival surface is set as the light amount value of the (n + 1) order light source surface
The virtual ray vector setting means sets a ray vector from the (n + 1) th order light source surface to the (n + 1) th order arrival surface,
The light ray reachability determination unit is configured to determine only a unit cube or a unit rectangular parallelepiped corresponding to the unit space through which the light vector set by the virtual light vector setting unit passes, and the light vector set by the virtual light vector setting unit. In the middle of tracing the above, the light vector is searched from the (n + 1) th order light source surface by searching whether it intersects with other surface elements other than the (n + 1) th order light source surface and the (n + 1) th order arrival surface. Determine whether the target (n + 1) next arrival plane is reachable,
The reaching surface light amount value calculating means is configured such that the ray vector set by the virtual ray vector setting means by the ray reachability determining means can reach the target (n + 1) order reaching surface from the (n + 1) order light source surface. For the determined (n + 1) th order arrival surface, the (n + 1) th order light source surface is obtained by multiplying the light amount value reaching the nth order arrival surface from the nth order light source surface by the diffuse emissivity of the nth order arrival surface. In consideration of the transmittance of other surface elements other than the (n + 1) th order light source surface and the (n + 1) th order arrival surface where the light vector intersects, the initial radiant light quantity value is determined from the (n + 1) th order light source surface. (N + 1) Calculate the amount of light reaching the next arrival surface,
The reaching surface light amount value storage means is given from the (n + 1) th order light source surface of the next candidate to the light amount value of the surface element data relating to the (n + 1) th order reaching surface or all (n + 1) th order reaching surfaces as candidates. The surface element data relating to the (n + 1) -order arrival surface or all candidate (n + 1) -order arrival surfaces are updated and stored,
Each of the light source surface light amount value setting means, the virtual light beam vector setting means, the light ray arrival possibility determination means, the arrival surface light amount value calculation means, and the arrival surface light amount value storage means are sequentially executed, The final light amount stored in the surface element data as the final light amount value of the surface element when the light amount value added from the (n + 1) next light source surface to the (n + 1) next arrival surface reaches a predetermined reference. 8. The light environment analysis apparatus according to claim 6, further comprising a value storage unit. The light beam reachability determining means determines whether or not a light beam can reach from the n (n = 1, 2, 3,...) Next light source surface to the n (n = 1, 2, 3,...) Next reach surface. 9. The light according to claim 6, wherein it is determined whether or not the n-order light source surface and the n-order arrival surface are visible from the magnitude relationship on the coordinate axes. Environmental analysis equipment. The unit cube or unit cuboid corresponding to the unit space of the internal space constituted by the building shape data is a unit cube or unit cuboid based on the design module dimensions of the building. The light environment analysis apparatus according to claim 1. Based on the final reached light amount value stored in the surface element data of each surface element of the unit cube or unit rectangular parallelepiped corresponding to the unit space of the internal space constituted by the shape data of the building to be evaluated, the interior of the building The light environment analysis device according to any one of claims 6 to 10, further comprising a light amount value display means for displaying a final reached light amount value for each unit space. For each area divided into a grid based on a unit cube or unit cuboid corresponding to a unit space of the internal space constituted by the shape data of the building to be evaluated, for each unit space of the internal space of the building The light environment analysis apparatus according to any one of claims 6 to 10, further comprising a light amount value display means for displaying a final reached light amount value. A measuring surface element setting means for setting a measuring surface element at a predetermined position on the coordinate axis of the shape data of the building to be evaluated;
The final light amount values of all the surface elements stored by the final light amount value storage means according to claim 8 and the opening surface according to claim 6 or 7 serve as surface elements of a light source. Brightness calculation means for calculating the brightness on the measurement surface element set by the measurement surface element setting means, using the light amount value stored in the surface element data relating to the next light source surface as a light source,
Brightness display means for displaying the brightness on the surface element for measurement calculated by the brightness calculation means;
The optical environment analysis apparatus according to any one of claims 7 to 12, comprising: The measurement surface element set by the measurement surface element setting means is set on a horizontal plane having a certain height from a floor surface constituted by shape data of the building to be evaluated. 13. The light environment analysis apparatus according to 13.