JP2005128799A - Method, program, apparatus, and system for simulating external appearance of structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a system for simulating the external appearance of a structure that can instantaneously display two-dimensional image data of an arbitrary direction, when the two-dimensional image data are displayed sequentially on a display means, in the order of selection. <P>SOLUTION: Three-dimensional figure data of a structure which is covered at least partially with a transparent component are generated (step S101) and rotated at specified pitches, to generate two-dimensional image data of the external appearance of the structure, at respective angles of rotation by a ray-tracing method from the three-dimensional figure data of the respective angles of rotation (step S102); and matrix data, in which the two-dimensional image data of the respective angles of rotation are related, are generated from the two-dimensional image data of the respective angles of rotation (step S103), two-dimensional image data of arbitrary angles of rotation are selected from the matrix data (step S104), and the selected two-dimensional image data are displayed in the order of selection (step S105). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a technique for predicting the appearance of a structure that is at least partially covered with a transparent part, and more specifically, when two-dimensional image data in an arbitrary direction is sequentially displayed on a display unit, the display is instantaneously performed. The present invention relates to a structure external appearance simulation method, a structure external appearance simulation program, a structure external appearance simulation apparatus, and a structure external appearance simulation system.

  With the development of computer technology in recent years, the appearance of a structure is predicted by computer simulation without actually making a prototype of a structure, for example, a vehicle headlamp that is at least partially covered with transparent parts. The technology to do is becoming used. In such an appearance simulation of a structure, it is necessary to generate two-dimensional image data of the appearance of the structure from the three-dimensional graphic data of the structure.

  Generally, two-dimensional image data of the appearance of a high-quality (realistic like a photograph) structure is generated from the three-dimensional graphic data of the structure that is at least partially covered with transparent parts, that is, For rendering, a ray tracing method (ray tracing method) is used. This ray tracing method generates two-dimensional image data from three-dimensional graphic data in consideration of light reflection, transmission, and refraction effects in the transparent parts of the structure, and the generated two-dimensional image data is the actual structure. Compared to things, it becomes more realistic. However, in this ray tracing method, since light rays are traced at each pixel of the generated two-dimensional image data, that is, at each dot, the calculation time increases according to the number of pixels of the generated two-dimensional image data. .

  Therefore, for example, as shown in Patent Document 1, a technique for reducing the calculation time when generating two-dimensional image data from three-dimensional graphic data by this ray tracing method has been proposed. In this prior art, first, two-dimensional image data considering the illumination effect is generated from the three-dimensional graphic data viewpoint position, the light source position, etc. of the structure, and then the reflectance and reflection color are added to the generated two-dimensional image data. The reflection effect calculated using is synthesized. Thereby, the calculation time can be shortened compared with the case where the two-dimensional image data is generated from the three-dimensional graphic data of the structure in consideration of the illumination effect and the reflection effect at the same time and displayed on the display means.

JP 2000-041064 A

  By the way, when predicting the appearance of a structure that is at least partially covered with transparent parts, such as a vehicle headlamp, the structure should be accurately evaluated only with two-dimensional image data viewed from one direction. Is difficult. This is because at least a part of the structure is covered with a transparent part, so that the appearance differs depending on the viewing direction. That is, the appearance of the built-in component covered with the transparent component differs depending on the viewing direction, and the overall evaluation of the structure, that is, the appearance cannot be determined. Therefore, it is necessary to sequentially display on the display means two-dimensional image data of the appearance of the structure in an arbitrary direction desired to be viewed by a person viewing the two-dimensional image data displayed from the three-dimensional graphic data of the structure.

  However, as shown in the conventional example, two-dimensional image data of the appearance of the structure in an arbitrary direction desired by the viewer who views the displayed two-dimensional image data is sequentially generated from the three-dimensional graphic data of the structure. In order to sequentially display on the display means, two-dimensional image data of the appearance of the structure as viewed from one direction is displayed, and then two-dimensional image data of the appearance of the structure as viewed from the next direction is displayed. There was a problem that it took too much time. For example, when generating two-dimensional image data of the appearance of a structure having an image area of 1280 dots × 1024 dots by the ray tracing method from the three-dimensional graphic data of the structure and displaying it on the display means, a general personal In a computer, it takes about 10 minutes to display. In other words, after displaying the two-dimensional image data of the structure viewed from one direction, it takes about 10 minutes to display the two-dimensional image data of the structure viewed from the next direction. there were. In this case, even if the 2D image data of the appearance of the structure in an arbitrary direction desired by the viewer who sees the displayed 2D image data is sequentially displayed on the display means, the 2D image data can be displayed instantaneously. The overall evaluation of the structure, that is, the appearance, cannot be accurately determined.

  The present invention has been made in view of the above, and it is possible to instantaneously display a structure appearance simulation method and a structure that can be instantaneously displayed when two-dimensional image data in an arbitrary direction is sequentially displayed on a display unit. An object of the present invention is to provide an appearance simulation program and a structure appearance simulation system.

  In order to solve the above-mentioned problems and achieve the object, the present invention is a method of simulating the appearance of a structure, and creates 3D graphic data of a structure at least partially covered with a transparent part 3 Two-dimensional image data creation procedure and two-dimensional image data for generating two-dimensional image data of the appearance of a structure at each rotation angle by rotating the three-dimensional graphic data at a predetermined pitch and using the ray tracing method from the three-dimensional graphic data at each rotation angle An image data generation procedure, a matrix data generation procedure for generating matrix-like data in which two-dimensional image data at each rotation angle is associated based on the rotation angle, and any matrix data. 2D image data selection procedure for selecting 2D image data at a rotation angle, and selected Characterized in that it comprises a two-dimensional image display procedure for displaying on the display unit dimensions image data in the selected order.

  Further, according to the present invention, there is provided an apparatus for simulating the appearance of a structure, the three-dimensional figure data creating means for creating the three-dimensional figure data of the structure at least partially covered with transparent parts, and the three-dimensional figure data. Two-dimensional image data generating means for generating two-dimensional image data of the appearance of the structure at each rotation angle by the ray tracing method from the three-dimensional graphic data at each rotation angle, and two-dimensional image data at each rotation angle Matrix data generating means for generating matrix-like data in which two-dimensional image data at each rotation angle is associated from the image data based on the rotation angle, and two-dimensional selecting two-dimensional image data at an arbitrary rotation angle from the matrix data A table that displays the image data selection means and the selected two-dimensional image data in the order of selection. Characterized in that it comprises a means.

  According to these inventions, the three-dimensional graphic data of the structure is previously rotated at a predetermined pitch, and the two-dimensional image data of the appearance of the structure is generated from the three-dimensional graphic data of the rotated structure. Further, the two-dimensional image data of the appearance of the plurality of structures are associated based on the pitch, that is, matrix-like data in which the two-dimensional image data at each adjacent rotation angle is arranged is generated. Then, the viewer wants to view the two-dimensional image data displayed from the pre-generated matrix data, and selects the two-dimensional image data at an arbitrary rotation angle, and the display means displays the appearance of the selected structure. Two-dimensional image data is displayed in the order of selection. That is, two-dimensional image data of the appearance of the structure at each rotation angle is generated in advance from the three-dimensional graphic data of the structure that requires calculation time, and this is used as one matrix data, and each rotation angle in the matrix data is generated. The two-dimensional image data at an arbitrary rotation angle is selected from the two-dimensional image data at and displayed on the display means. Therefore, when displaying the two-dimensional image data of the structure at the selected arbitrary rotation angle on the display means, the two-dimensional image data of the structure at the selected arbitrary rotation angle is selected after the selection. It is possible to eliminate the need to generate from the three-dimensional graphic data of the structure. As a result, when the two-dimensional image data in an arbitrary direction is sequentially displayed on the display means, it is possible to determine the overall evaluation of the structure, that is, the appearance, by instantaneously displaying the data.

  According to the present invention, in the appearance simulation method of the structure, the two-dimensional data procedure is characterized in that the three-dimensional graphic data is rotated at a predetermined pitch in each of two orthogonal directions.

  According to the present invention, the two-dimensional image data of the appearance of the structure displayed on the display means not only predicts the appearance of the structure when it is rotated at a predetermined pitch in one direction, Two-dimensional image data of the appearance of the structure when the appearance of the structure is viewed from all directions can be instantaneously displayed. Therefore, the person who views the two-dimensional image data displayed on the display means can determine the overall reliable evaluation of the structure, that is, the appearance.

  According to the present invention, in the appearance simulation method of the structure, the two-dimensional image data selection procedure selects two-dimensional image data at an arbitrary rotation angle based on a change amount of the input means.

  According to the present invention, for example, one or two-dimensional image data at an arbitrary rotation angle is selected based on a change amount of an input unit such as a mouse, and the selected two-dimensional image data is selected as a display unit. Display in order. That is, a person viewing the two-dimensional image data displayed on the structure display means can select the two-dimensional image data in the appearance of the structure in the desired direction, and view the two-dimensional image data displayed on the display means. The two-dimensional image data selected by the user can be instantaneously displayed on the display means. As a result, it is possible to evaluate the entire structure in an approximated state when performing an overall evaluation of the structure by picking up and viewing the actual structure.

  According to the present invention, in the appearance simulation method for a structure, the structure at least partially covered with a transparent part is a vehicle lamp.

  According to the present invention, since the structure is a vehicle lamp, internal parts such as a bulb, a reflector, and an inner panel (decorative plate) that can be seen through an outer lens that is a transparent part of the vehicle lamp are arranged in any direction. It can be predicted from the two-dimensional image data of the appearance of the lamp. Therefore, the person who views the two-dimensional image data displayed on the display means can determine the overall reliable evaluation of the vehicular lamp, that is, the appearance.

  In addition, the present invention is a structure appearance simulation program that causes a computer to execute the structure appearance simulation method.

  According to the present invention, the structure external appearance simulation method can be realized by using a computer by causing a computer to read and execute the structure external appearance simulation program, and the same effects as those of these methods. Can be obtained.

  Further, according to the present invention, there is provided an external appearance simulation system for a structure, the three-dimensional figure data creating means for creating the three-dimensional figure data of the structure at least partially covered with the transparent part, and the three-dimensional figure data. Two-dimensional image data generating means for generating two-dimensional image data of the appearance of the structure at each rotation angle by the ray tracing method from the three-dimensional graphic data at each rotation angle, and two-dimensional image data at each rotation angle A data generation device comprising matrix data generation means for generating matrix data in which two-dimensional image data at each rotation angle is associated from image data based on the rotation angle, and matrix data generated in advance by the data generation device Data acquisition means for acquiring the desired rotation angle from the matrix data Characterized in that it comprises a two-dimensional image data selection means for selecting a two-dimensional image data, and a 2-dimensional image display apparatus and a display means for displaying the selected order the two-dimensional image data selected in.

  According to the present invention, the data generation device that generates matrix-like data and the two-dimensional image display device that displays two-dimensional image data at an arbitrary rotation angle in the generated matrix-like data are configured as separate devices. Yes. Therefore, since the generation of the two-dimensional image data based on the three-dimensional graphic data having a large amount of calculation is performed by the data generation device which is a computer having a high processing speed, the two-dimensional image data having a small amount of calculation is displayed on the display means. Can also be performed on a slow computer.

  The structure external appearance simulation method, the structure external appearance simulation program, and the structure external appearance simulation system according to the present invention display instantaneously when two-dimensional image data in an arbitrary direction is sequentially displayed on the display means. Thus, there is an effect that the overall evaluation of the structure, that is, the appearance can be judged.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The present invention is not limited to the best mode for carrying out the invention. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same. In the following description, a case in which a vehicular lamp, that is, a front combination lamp is used as a structure that is at least partially covered with a transparent part will be described. However, the present invention is not limited to this, and a rear combination lamp and a headlamp are used. A vehicle lamp such as a side lamp, a fog lamp, and a tail lamp, a vehicle including a window as a transparent part, or the like may be used as a structure. Transparent parts include colorless and transparent parts, colorless and translucent parts, colored and transparent parts, and colored and translucent parts.

  FIG. 1 is a diagram showing a configuration example of an external appearance simulation system for a structure according to the present invention. As shown in the figure, a structure appearance simulation system 1 according to the present invention includes a data generation device 10 and a two-dimensional image display device 20. The data generation device 10 includes a processing unit 11, a storage unit 12, and an input / output device 13. On the other hand, the two-dimensional image display device 20 includes a processing unit 21, a storage unit 22, and an input / output device 23.

  The processing unit 11 of the data generation device 10 further includes a three-dimensional graphic data generation unit 11a, a two-dimensional image data generation unit 11b, and a matrix data generation unit 11c. Further, the data generation device 10 is provided with an input / output port 14, and the input / output device 13 is connected via the input / output port 14. Information necessary for creating 3D graphic data of the structure by the input means 13a provided in the input / output device 13 and physical property values (reflectance, refraction, etc.) of each component necessary for generating 2D image data Rate, color, etc.) and boundary conditions (incident angle of light source or parallel light source, ambient environmental color, etc.) are input to the processing unit 11 and the storage unit 12. Here, an input device such as a keyboard, a mouse, a tablet, or a voice recognition device can be used as the input means 13a.

  The three-dimensional graphic data creation unit 11a, the two-dimensional image data generation unit 11b, and the matrix-like data generation unit 11c constituting the processing unit 11 are connected to each other by an input / output port 14, and the calculation results and It is configured so that other information can be exchanged. Also. The storage unit 12 is also connected to the input / output port 14, and temporarily stores the calculation result of the processing unit 11, or stores generated matrix data 60 described later. The storage unit 12 can be accessed via the input / output port 14 by the three-dimensional graphic data generation unit 11a, the two-dimensional image data generation unit 11b, and the matrix data generation unit 11c constituting the processing unit 11. Yes.

  The storage unit 12 is a part of the structure appearance simulation method according to the present invention, that is, a structure appearance simulation program that realizes a three-dimensional graphic data creation procedure, a two-dimensional image data generation procedure, and a matrix data generation procedure. Is stored. Here, the storage unit 12 is a fixed disk device such as a hard disk device, a flexible disk, a magneto-optical disk device, or a nonvolatile memory such as a flash memory (a storage medium that can only be read such as a CD-ROM), It can be constituted by storage means such as a volatile memory such as RAM (Random Access Memory), or a combination thereof.

  The processing unit 11 includes a memory such as a RAM and a ROM, and a CPU (Central Processing Unit). In the appearance simulation of the structure, the processing unit 11 performs processing based on the physical property values and boundary conditions of each part necessary for generating the three-dimensional graphic data and the two-dimensional image data created as described above. A part of the appearance simulation program of the structure is read into a memory (not shown) of the processing unit 11 to perform calculation. Note that the processing unit 11 appropriately stores a numerical value in the middle of the calculation in the storage unit 12 and appropriately takes out the stored numerical value from the storage unit 12 and performs the calculation. The processing unit 11 may be realized by dedicated hardware instead of the appearance simulation program for the structure.

  Note that the three-dimensional graphic data of the structure being created or created and the two-dimensional image data of the appearance of the structure being created or created are displayed on the display means 13 b of the input / output device 13. Here, a CRT (Cathode Ray Tube), a liquid crystal display device, or the like can be used as the display means 13b. The three-dimensional graphic data of the structure being created or created and the two-dimensional image data of the appearance of the structure being created or created can be output to a printer (not shown). Moreover, the memory | storage part 12 may be provided in the process part 11, and may be provided in another apparatus (for example, database server). Moreover, the structure which can access the data generation apparatus 10 by the wired or wireless method from the terminal device which is not shown in figure provided with the input / output device 13 may be sufficient.

  The processing unit 21 of the two-dimensional image display device 20 further includes a matrix data acquisition unit 21a, a two-dimensional image data selection unit 21b, and a two-dimensional image display unit 21c. The two-dimensional image display device 20 is provided with an input / output port 24, and an input / output device 23 is connected via the input / output port 24. The input means 23 a provided in the input / output device 23 is used to select a signal for acquiring the matrix data 60 from the data generation device 10 and two-dimensional image data at an arbitrary rotation angle described later from the matrix data 60. The signal is input to the processing unit 21 and the storage unit 22. Here, in the structure external appearance simulation system 1 according to the present invention, as shown in the figure, the input means 23a is a mechanical or optical mouse, but the present invention is not limited to this, and the input means is displaced. The displacement amount may be any signal that can be input to the processing unit 21 or the storage unit 22 as a signal via the input / output port 24. For example, an input device such as a keyboard (such as a numeric keypad or a direction key) or a tablet can be used.

  The matrix-like data acquisition unit 21a, the two-dimensional image data selection unit 21b, and the two-dimensional image display unit 21c constituting the processing unit 21 are connected to each other by an input / output port 24. It is configured to be able to exchange information. Also. The storage unit 22 is also connected to the input / output port 24, and temporarily stores the calculation result of the processing unit 21, or stores acquired matrix data described later. The storage unit 22 can be accessed via the input / output port 24 by the matrix data acquisition unit 21 a, the two-dimensional image data selection unit 21 b, and the two-dimensional image display unit 21 c constituting the processing unit 21. .

  The storage unit 22 stores a part of a structure appearance simulation method according to the present invention, that is, a structure appearance simulation program for realizing a two-dimensional image data selection procedure and a two-dimensional image display procedure. Here, the storage unit 22 can be configured in the same manner as the storage unit 12.

  The processing unit 21 is configured in the same manner as the processing unit 11. In the appearance simulation of the structure, the processing unit 21 executes a part of the appearance simulation program of the structure based on the matrix data 60 and the displacement amount of the input unit 24a acquired as described above. Are read into a memory (not shown) to perform the calculation. Note that the processing unit 21 appropriately stores a numerical value in the middle of the calculation in the storage unit 22 and appropriately takes out the stored numerical value from the storage unit 22 and performs the calculation. The processing unit 21 may be realized by dedicated hardware instead of the appearance simulation program for the structure.

  The selected two-dimensional image data 50 at an arbitrary rotation angle, which will be described later, is displayed on the display means 23b of the input / output device 23 in the order of selection. Here, the display means 23b can be the same as the display device 13b. The storage unit 22 may be provided in the processing unit 21 or may be provided in another device (for example, a database server). Further, the terminal device (not shown) provided with the input / output device 23 may be configured to be able to access the two-dimensional image display device 20 by either a wired or wireless method.

  Further, the appearance simulation program for the structure is not necessarily limited to a single configuration in the data generation device 10 and the two-dimensional image display device 20, but a program already stored in the computer system, for example, an OS (Operating System) The function may be achieved in cooperation with a separate program represented by (System). Further, a structure appearance simulation program for realizing the functions of the processing units 11 and 21 shown in FIG. 1 is stored in a computer-readable recording medium, and the structure appearance simulation program recorded on the recording medium is stored. The structure appearance simulation method according to the present invention may be executed by being read and executed by a computer system. The “computer system” here includes an OS and hardware such as peripheral devices.

  Next, a structure external appearance simulation method according to the present invention will be described. FIG. 2 is a view showing a flowchart of the structure external appearance simulation method according to the present invention. First, the processing unit 11 of the data generation device 10 creates the three-dimensional graphic data 30 of the front combination lamp that is a structure (step S101). FIG. 3 is a diagram showing the created three-dimensional graphic data. Here, for example, by executing a three-dimensional CAD (Computer Aided Design) program, a three-dimensional CAE (Computer Aided Engineering) program, or the like stored in the storage unit 12 of the data generation device 10, the three-dimensional of the processing unit 11 is executed. The data creation unit 11a creates the three-dimensional graphic data 30 by designing a front combination lamp. The created three-dimensional graphic data 30 is identified one by one using three-dimensional coordinates.

  The created three-dimensional graphic data 30 is composed of a plurality of parts. Specifically, as shown in the figure, a plurality of bulbs 31, a reflector 32 that is a reflective component that reflects light, and an inner panel 33 are arranged in a housing 34, and an outer lens that is a transparent component so as to cover them. 35 is fixed to the housing. The created three-dimensional graphic data 30 is temporarily stored in the storage unit 12 of the data generation device 10.

  Next, the processing unit 11 of the data generation device 10 generates the two-dimensional image data 50 of the appearance of the front combination lamp from the three-dimensional graphic data 30 of the front combination lamp that is a structure (step S102). FIG. 4 is a diagram showing a flowchart of the two-dimensional image data generation procedure. As shown in the figure, first, the two-dimensional image data generation unit 11b of the processing unit 11 sets the physical property values of the components 31 to 35 of the three-dimensional graphic data 30 (step S201). This is because the physical property values of the components 31 to 35 input from the input means 13a of the input / output device 13, for example, the reflectance, refractive index, material characteristics, and the surface color of the components 31 to 35 are displayed on the components 31. Set to ~ 35. In addition, when there exists components comprised with a common material etc. among each components 31-35, these components may be made into one group previously, and a physical-property value may be set with respect to this group.

  Next, the two-dimensional image data generation unit 11b arranges the environment BOX 40 in the same three-dimensional coordinates so that the three-dimensional graphic data 30 in which the physical property values are set is arranged inside (step S202). FIG. 5 is a diagram showing the relationship between the three-dimensional graphic data and the environment BOX. As shown in the figure, the two-dimensional image data generation unit 11b creates a rectangular parallelepiped environment BOX 40 at the three-dimensional coordinates from which the three-dimensional figure data 30 is created, and the three-dimensional figure data 30 is arranged in the environment BOX 40. Preferably, it arrange | positions in the center of environment BOX40. Alternatively, the 2D image data generation unit 11b creates the environment BOX 40 in advance, reads the 3D graphic data 30 from the storage unit 12 to the 3D coordinates of the created environment BOX 40, and stores the 3D graphic data 30 in the environment BOX 40. You may arrange in. The environment BOX 40 includes four side surfaces 41, a ceiling surface 42, and a floor surface 43 as shown in FIG.

  Next, the two-dimensional image data generation unit 11b sets the color of the environment BOX 40 (Step S203). FIG. 6 is an explanatory diagram of setting the color of the environment BOX. As shown in the figure, the side surface 41 of the environment BOX 40 is divided into a ground side 41b and an empty side 41c with reference to a horizontal line 41a. The ground side 41b is set so that the color changes sequentially from the nearest to the horizontal line 41a, that is, from the near ground part 41d to the farthest part from the horizontal line 41a, that is, the far ground part 41e. On the other hand, the sky side 41c is set so that the color changes sequentially from the nearest to the horizontal line 41a, that is, from the neighboring sky part 41f to the part farthest from the horizontal line 41a, that is, the far sky part 41g. Further, the ceiling surface 42 is set to have the same color as the color of the distant sky portion 41 g on the sky side 41 c of the side surface 41. The ground 43 is set to have the same color as the color of the far ground portion 41e on the ground side 41b of the side surface 41.

  In the storage unit 12, colors corresponding to the four seasons are stored in advance as RGB values (0 to 255). That is, in each of the four seasons, for example, spring, summer, autumn, and winter, the near ground color of the near ground portion 41d on the ground side 41b, the far ground color of the far ground portion 41e, the near sky blue of the near sky portion 41f on the sky side 41c, The far sky color of the far sky portion 41g is stored as RGB values. The two-dimensional image data generation unit 11b reads the colors of the portions 41d to 41g of the side surface 41 from the storage unit 12 based on the season input from the input unit 13a of the input / output device 13, and sets the color of the environment BOX 40. .

  Next, the two-dimensional image data generation unit 11b sets the parallel light source L for the three-dimensional graphic data 30 (step S204). FIG. 7 is an explanatory diagram for setting a parallel light source for three-dimensional graphic data. As shown in the figure, the parallel light source L is light irradiated into the environment BOX 40 from the outside of the environment BOX 40. The parallel light source L is set by an incident angle θ with respect to the XZ plane of three-dimensional coordinates when viewed from a position where a camera C described later is disposed. The storage unit 12 stores an incident angle θ based on the season or month, day, place, and time in advance. The incident angle θ is determined by time, latitude, the inclination of the earth axis, and the like. For example, if the season is spring, the place is Tokyo, and the time is 12:00, the latitude of Tokyo is 35.5 degrees and the inclination of the earth axis is 23.4 degrees. 5 degrees. The two-dimensional image data generation unit 11b reads the incident angle θ of the parallel light source L from the storage unit 12 based on the season, place, and time input from the input unit 13a of the input / output device 13, and the three-dimensional graphic data 30 and A parallel light source L having an incident angle θ in the three-dimensional coordinates of the environment BOX 40 is set.

  As described above, when the 2D image data 50 is generated from the 3D graphic data 30 by setting the color of the environment BOX 40 (step S203) and / or setting the parallel light source (step S204), the structure The outer lens 35 that is a transparent portion of the front combination lamp, the reflector 32 that is a reflective portion, the inner panel 33, and the like can be reflected in colors according to the outdoor environment. Thereby, the two-dimensional image data 50 of the appearance of the generated structure can be approximated to the appearance of the structure actually placed in the outdoor environment.

  Next, the two-dimensional image data generation unit 11b sets the camera C (step S205). Here, the direction in which the three-dimensional graphic data 30 arranged in the environment BOX 40 is viewed, that is, the two-dimensional image data 50 is generated is determined. As shown in the figure, in the three-dimensional coordinates of the three-dimensional graphic data 30 and the environment BOX 40, the camera C is arranged so that the three-dimensional graphic data 30 can be viewed from the front.

  Next, the 2D image data generation unit 11b generates 2D image data 50 of the appearance of the structure from the 3D graphic data 30 (step S206). FIG. 8 is a diagram illustrating an example of two-dimensional image data of the appearance of the generated structure. This is because the three-dimensional graphic data 30 and the three-dimensional graphic data 30 arranged in the environmental BOX 40 are rendered by the ray tracing method from the camera C arranged in the three-dimensional coordinates of the environmental BOX 40, and the two-dimensional image data 50 is obtained. Generate. The ray-tracing method (ray tracing method) takes into account light reflection, transmission, and refraction effects in the outer lens 35, which is a transparent part of a front combination lamp, which is a structure, and the reflector 32, the inner panel 33, etc., which are reflection parts. The two-dimensional image data 50 is generated from the three-dimensional graphic data.

  As shown in the figure, the two-dimensional image data 50 generated by the ray tracing method confirms the bulb, reflector, inner panel, etc. in the outer lens, which is a transparent part of the front combination lamp, which is an actual structure. Can do. Further, the reflection of the outer lens, the reflector, and the inner panel can be predicted in the same manner as the actual structure. The generated two-dimensional image data 50 of the appearance of the structure is temporarily stored in the storage unit 12 of the data generation device 10.

  Next, the two-dimensional image data generation unit 11b rotates the three-dimensional graphic data 30 at a predetermined pitch (step S207). This rotates the three-dimensional graphic data 30 in the X direction (with respect to the Z axis) and / or the Z direction (with respect to the Y axis) in the three-dimensional coordinates of the three-dimensional graphic data 30 and the environment BOX 40. That is, as shown in FIG. 7, the three-dimensional graphic data 30 is rotated in the X direction and / or at a predetermined pitch in the Z direction with respect to the camera C arranged at the three-dimensional coordinates. Here, the predetermined pitch is at least 10 degrees in each direction. If the predetermined pitch is 10 degrees or more, the displayed two-dimensional image data 50 is seen even if the two-dimensional image data 50 at an arbitrary rotation angle selected on the display means 23b described later is sequentially displayed in the selection order. This is because a person cannot accurately evaluate the entire structure. The predetermined pitch is preferably 3 degrees or less. When the predetermined pitch is 3 degrees or less, when the two-dimensional image data 50 at an arbitrary rotation angle selected on the display means 23b described later is sequentially displayed in the selection order, the actual structure is rotated by hand, This is because substantially the same display can be performed by the display means 23b, and it becomes easier for a person viewing the displayed two-dimensional image data to evaluate the entire structure. Further, without rotating the three-dimensional graphic data 30, the arrangement of the camera C in the three-dimensional coordinates around the three-dimensional graphic data 30 may be rotated in the X direction and / or the Z direction. As a result, when the actual structure is placed in an outdoor environment, the same 2 as when the line of sight of the person viewing the two-dimensional image data displayed on the display means is rotated at a predetermined pitch with respect to the actual structure. Dimensional image data 50 can be generated.

  Next, the two-dimensional image data generation unit 11b determines whether the two-dimensional image data 50 has been generated from the three-dimensional graphic data 30 at all rotation angles (step S208). If the 2D image data 50 has not been generated at all rotation angles, the process returns to step S206, and the 2D image data of the appearance of the structure is obtained from the 3D graphic data 30 rotated in the X direction and / or the Z direction. 50 is generated by the ray tracing method, and the generated two-dimensional image data 50 is temporarily stored in the storage unit 12 of the data generation device 10. On the other hand, when all the 2D image data 50 of the appearance of the structure is generated from the 3D graphic data 30 rotated in the X direction and / or the Z direction by the ray tracing method, the 2D image data generation procedure shown in FIG. Exit. Here, the 2D image data 50 of the appearance of the structure displayed on the display means 23b, which will be described later, is the 2D image data 50 of the appearance of the structure that is visible when the structure is rotated at a predetermined pitch in one direction. In addition, it is possible to display the two-dimensional image data 50 of the appearance of the structure in two directions, that is, when the appearance of the structure is viewed from all directions.

  Here, the two-dimensional image data generation unit 11b receives the three-dimensional graphic data by 10 degrees in the X direction and / or the Z direction when a predetermined pitch is input, for example, 10 degrees from the input means 13a of the input / output device 13. Rotate. When the three-dimensional graphic data 30 is rotated in the XZ direction at a predetermined pitch, a rotation angle that can be rotated in the XZ direction at a predetermined pitch may be set depending on the shape of the structure. For example, when the overall evaluation of a structure such as a front combination lamp, that is, the appearance is judged, the outer lens may be rotated in the X direction and / or the Z direction to an angle at which the outer lens can be seen. This is because the external appearance of the housing for fixing the outer lens does not significantly affect the overall evaluation of the front combination lamp, so the two-dimensional image data 50 occupying most of the portion corresponding to the actual housing is three-dimensional. This is because it is not necessary to generate the graphic data 30. In the two-dimensional image data generation procedure shown in FIG. 4, the environment BOX 40 is set. However, when the outdoor environment is not taken into consideration in the overall evaluation of the structure, the environment BOX 40 may not be set. Further, only the appearance of a composition rotated at a predetermined pitch in one direction when a person who views the two-dimensional image data 50 displayed on the display means 23b determines the overall reliable evaluation of the structure, that is, the appearance. 2D, the three-dimensional graphic data 30 of the structure may be rotated only in one of the X direction and the Z direction to generate the two-dimensional image data 50.

  Next, as illustrated in FIG. 2, the processing unit 11 of the data generation device 10 generates matrix data 60 from the generated two-dimensional image data 50 (step S103). FIG. 9A is a flowchart of a matrix data generation procedure. FIG. 9-2 is a conceptual diagram of matrix data. As illustrated in FIG. 9A, the matrix data generation unit 11c of the processing unit 11 first arranges the two-dimensional image data 50 at each rotation angle according to the rotation angle in the XZ direction (step S301). For example, as shown in FIG. 9-2, two-dimensional image data not rotated in the XZ direction is set as two-dimensional image data (0, 0), and the two-dimensional image data (0, 0) is arranged in the center. Two-dimensional image data (1, 0) and two-dimensional image data (-1, 0) when rotated only once in the X direction, that is, rotated by one pitch to the left and right, are represented as two-dimensional image data (0, 0). Arrange on the left and right. On the other hand, two-dimensional image data (0, 1) and two-dimensional image data (0, -1) when rotated once in the Z direction, that is, rotated one pitch up and down, are obtained as two-dimensional image data (0, 0). ) Above and below. Also, two-dimensional image data (1, 1), two-dimensional image data (1, -1), and two-dimensional image when rotated only once in both directions of the XZ direction, that is, rotated one pitch vertically and horizontally. Data (1, -1) and two-dimensional image data (-1, -1) are arranged diagonally on the top, bottom, left and right of the two-dimensional image data (0, 0). Thereby, when there are nine two-dimensional image data 50 at each rotation angle, a two-dimensional image data group arranged in a 3 × 3 matrix is obtained.

  Next, the matrix-like data generation unit 11c sequentially assigns serial numbers to the two-dimensional image data of the arranged two-dimensional image data group (step S302). This order is a data order that is continuous in the horizontal direction or the vertical direction. Therefore, for example, when sequentially assigning data groups arranged in a 3 × 3 matrix in the left-right direction, first, the number “0001” is assigned to the two-dimensional image data (1, 1) in the first row. And the number “0002” is assigned to the two-dimensional image data (0, 1) on the right side of the two-dimensional image data (1, 1), and 2 on the right side of the two-dimensional image data (0, 1). The number “0003” is assigned to the dimensional image data (−1, 1). Next, the number “0004” is assigned to the two-dimensional image data (0, 1) in the second row, the number “0005” is assigned to the two-dimensional image data (0, 0), and the number is assigned to the two-dimensional image data (0, −1). “0006” is assigned. The number “0007” is assigned to the two-dimensional image data (−1, 1) in the third row, the number “0008” is assigned to the two-dimensional image data (−1, 0), and the two-dimensional image data (−1, −1). The number “0009” is assigned to each.

  Next, the matrix-like data generation unit 11c associates serial numbers given in order with the two-dimensional image data 50 at each rotation angle (step S303). This associates each two-dimensional image data 50 in the two-dimensional image data group with all the two-dimensional image data 50 adjacent (including the oblique direction) with a number assigned to each two-dimensional image data 50. As shown in FIG. 9-2, this associates the number given to each two-dimensional image data of the two-dimensional image data group as shown by an arrow A. For example, the number “0005” is associated with the number “0006” adjacent to the plus direction in the X direction, and the number “0006” is associated with the number “0005” adjacent to the minus direction in the X direction. Further, the number “0005” is adjacent to the plus direction in the X direction and the plus direction in the Z direction is the number “0001”, and is adjacent to the minus direction in the X direction and the minus direction in the Z direction of the number “0001”. Is associated with the number “0005”. Although not shown, for example, the number “0007” is adjacent to the plus direction in the X direction of the number “0001”, and the number “0007” is adjacent to the minus direction in the X direction of the number “0007”. 0001 "may be associated, and the number" 0003 "is adjacent to the minus direction in the X direction and the plus direction in the Y direction is the number" 0007 ", and the plus direction in the X direction of the number" 0007 " Also, the number “0003” adjacent to the negative direction of the Y direction may be associated. Thereby, in the two-dimensional image data display unit 21c of the processing unit 21 of the two-dimensional image display device 20 to be described later, the two-dimensional image data can be displayed on the display unit 23b in the order of selection so as to rotate one or more times.

  As described above, the matrix data 60 in which the two-dimensional image data 50 at each rotation angle is associated based on the rotation angle is generated, and the generated matrix data 60 is temporarily stored in the storage unit 12 of the data generation device 10. Then, the matrix data generation procedure shown in FIG. Note that it is not necessary to generate the matrix data 60 using all of the two-dimensional image data at each rotation angle stored in the storage unit 12 of the data generation device 10. For example, even if the predetermined pitch is 5 degrees and the 2D image data 50 at each rotation angle is generated from the 3D figure data 30, the 3D figure data 30 is rotated from the plurality of 2D image data 50 every 10 degrees. The matrix-like data 60 may be generated by selecting the two-dimensional image data 50 at each rotation angle. Further, the matrix data 60 is created by changing the file format (bmp, jpg, pix, etc.) of the generated two-dimensional image data 50 at each rotation angle and the image area when displayed on the display means 23b. Also good.

  Next, the matrix data acquisition unit 21a of the processing unit 21 of the two-dimensional image display device 20 is generated by the matrix data generation unit 11c of the processing unit 11 of the data generation device 10 as shown in FIG. 12 is obtained from the data generation device 10. As a method of acquiring the matrix data 60 from the data generation device 10, for example, the input / output port 14 of the data generation device 10 and the input / output port 24 of the two-dimensional image display device 20 are connected by a LAN cable (not shown). In this case, the matrix data acquisition unit 21a of the processing unit 21 acquires the matrix data 60 stored in the storage unit 12 of the data generation device 10 via the input / output port 24, the LAN cable, and the input / output port 14. May be.

  When the input / output port 14 of the data generation device 10 and the input / output port 24 of the two-dimensional image display device 20 are not connected by a LAN cable or the like, the storage unit of the data generation device 10 is connected via the input / output port 14. 12 is stored in a portable storage medium such as a flexible disk, an optical disk such as a CD-ROM and a CD-RAM, and a magneto-optical disk such as an MO by output means (not shown). The matrix data acquisition unit 21 a of the processing unit 21 reads the matrix data 60 stored in the portable storage medium by reading means (not shown) connected to the input / output port 24, thereby 60 may be acquired. Further, the matrix data 60 acquired by the matrix data acquisition unit 21 a of the processing unit 21 is stored in the storage unit 22 of the two-dimensional image device 20. The structural appearance simulation system 1 according to the present invention includes two devices, a data generation device 10 and a two-dimensional image display device 20, but the present invention is not limited to this. It may be a device for simulating the appearance of two structures. In this case, the three-dimensional graphic data creation unit 11a, the two-dimensional image data generation unit 11b, the matrix data generation unit 11c, the two-dimensional image data selection unit 21b, and the two-dimensional image display unit 21c are configured. Therefore, the processing unit does not need the matrix data acquisition unit 21a, and the structure appearance simulation apparatus can be simplified.

  Next, the processing unit 21 of the two-dimensional image display device 20 selects the two-dimensional image data 50 at an arbitrary rotation angle from the matrix data 60 as shown in FIG. 2 (step S104). FIG. 10A is a flowchart of the two-dimensional image selection data selection procedure. FIG. 10B is an explanatory diagram of a displacement amount of the input unit. First, as illustrated in FIG. 10A, the two-dimensional image data selection unit 21b of the processing unit 21 selects the reference image number of the matrix data 60 stored in the storage unit 12 (step S401). The two-dimensional image data 50 to which the reference image number is assigned is, for example, the two-dimensional image data 50 that has not been rotated in the XZ direction. In the matrix-like image data 60 in FIG. , 0). Accordingly, the two-dimensional image data selection unit 21b selects the image number “0001” given to the two-dimensional image data (0, 0). Next, the two-dimensional image data selection unit 21b outputs the selected reference image number (image number “0001” in FIG. 9-2) to the two-dimensional image display unit 21c of the processing unit 21 (step S402). .

  Next, the two-dimensional image data selection unit 21b determines whether or not the movement of the mouse that is the input unit 23a of the input / output device 23 of the two-dimensional image display device 20 is detected (step S403). This is because when the input unit 23 a moves, a movement signal is input from the input unit 23 a to the processing unit 21 via the input / output port 24. Therefore, the two-dimensional image data selection unit 21b determines whether or not the input unit 23a has moved by determining the presence or absence of this movement signal. Here, if the two-dimensional image data selection unit 21b determines that the movement of the input unit 23a is not sensed, the two-dimensional image data selection procedure illustrated in FIG.

  On the other hand, if the two-dimensional image data selection unit 21b determines that the movement of the input unit 23a is detected, the two-dimensional image data selection unit 21b acquires the XY coordinates immediately before the input unit 23a moves (step S404). Here, the movement of the mouse as the input means 23a is linked to the movement of the cursor displayed on the display means 23b. Further, the processing unit 21 of the two-dimensional image data device 20 grasps the position of the cursor with respect to the XY coordinates of the display unit 23b. Therefore, when the movement of the input unit 23a is detected, the two-dimensional image data selection unit 21b replaces the XY coordinates of the cursor position grasped by the processing unit 21 with the XY coordinates of the input unit 23a. The XY coordinate of 23a is acquired.

  Next, the two-dimensional image data selection unit 21b calculates the amount of displacement per unit time of the input unit 23a (step S405). Here, as shown in FIG. 10-2, when the mouse which is the input means 23a moves in the X direction and the Y direction (in the figure, a dotted line), the X direction plus direction or the minus direction and Y direction plus A movement signal is output to the processing unit 21 of the two-dimensional image display unit 20 with respect to the direction or the minus direction. This movement signal is output to the processing unit 21 from a rotary encoder that detects movement in the X direction and Y direction provided corresponding to the X direction and Y direction of the mouse as the input means 23a. This movement signal is output for each predetermined displacement amount of the mouse as the input means 23a (for example, a movement amount when a rotary encoder that rotates against the trackball rotates by a predetermined angle). When a movement signal is input from the mouse as the input means 23a, the two-dimensional image data selection unit 21b counts the number of movement signals until a predetermined unit time after sensing the movement of the input means 23a. That is, if the mouse which is the input means 23a is quickly moved, the number of movement signals counted per predetermined unit time is increased. Therefore, the two-dimensional image data selection unit 21b, based on the count number of movement signals output from the mouse which is the input means 23a per unit time, and the plus direction or minus direction in the X direction and plus direction or minus in the Y direction. The amount of displacement with respect to the direction is calculated. For example, if movement signals for the positive direction in the X direction and the negative direction in the Y direction are each output to the processing unit 21 only once, the displacement amounts in the X direction and the Y direction are each 1, and the negative direction in the X direction and If movement signals for the minus direction in the Y direction are output to the processing unit 21 only twice, the amounts of displacement in the X direction and the Y direction are each −2. Note that the amount of displacement in the X and Y directions may be changed according to the number of movement signal counts in the X and Y directions. For example, the displacement amount in the X direction may be set to 1 only after the movement signal for the positive direction in the X direction is output to the processing unit 21 five times.

  Next, the two-dimensional image data selection unit 21b selects the image number of the matrix data 60 from the respective displacement amounts in the X direction and the Y direction (step S406). This is to select the image number associated with the matrix data 60 from the respective displacement amounts in the X direction and Y direction of the mouse which is the input means 23a. The two-dimensional image data selection unit 21b selects an image number based on the respective displacement amounts in the X direction and the Y direction on the basis of the latest selected image number output to the two-dimensional image display unit 21c. For example, the image number “0005” given to the two-dimensional image data (0, 0) shown in FIG. 9-2 is set as the latest selected image number output to the two-dimensional image display unit 21c, and is calculated in step S405. It is assumed that the displacement amount in the X direction is −1 and the displacement amount in the Y direction is 1. In this case, the two-dimensional image data selection unit 21b is given from the matrix-like data 60 to the two-dimensional image data (-1, 1) arranged diagonally to the lower left of the two-dimensional image data (0, 0). The image number “0007” is selected. That is, two-dimensional image data (−1) rotated from the two-dimensional image data (0, 0) not rotated in the XZ direction by a predetermined pitch in the minus direction in the X direction and by a predetermined pitch in the minus direction in the Z direction. , 1) will be selected.

  Next, the two-dimensional image data selection unit 21b outputs the selected image number to the two-dimensional image display unit 21c (step S407). For example, in the example of step S406, the image number “0007” is output to the two-dimensional image display unit 21. Then, returning to step S403, when the two-dimensional image data selection unit 21b determines that the input unit 23a is still moving, the two-dimensional image display unit 21c repeats steps S404 to S407, and further selects the selected image number. Output to.

  Next, as shown in FIG. 2, the processing unit 21 of the two-dimensional image display device 20 displays the selected two-dimensional image data on the display unit 23b in the order of selection (step S105). FIG. 11 is a diagram showing two-dimensional image data displayed by the display means. First, as a two-dimensional image display procedure for stereoscopic vision, the two-dimensional image display unit 21c performs two-dimensional image data from the matrix data 60 stored in the storage unit 22 based on the image number selected in step S104. 50 is sequentially read in the selection order, and the two-dimensional image data 50 sequentially read in the selection order is output to the display means 23b. Next, the display unit 23b displays the selected two-dimensional image data 50 among the plurality of two-dimensional image data 50 shown in FIG. That is, the two-dimensional image display unit 21c causes the display unit 23b to sequentially display the two-dimensional image data 50 at an arbitrary rotation angle selected based on the displacement amount of the input unit 23a. Then, the structure is evaluated based on the two-dimensional image data 50 sequentially displayed in the selection order on the display means 23b (step S106).

  Thus, the structure appearance simulation method is completed. As described above, the two-dimensional image data 50 of the appearance of the structure at each rotation angle is generated in advance from the three-dimensional graphic data 30 of the structure requiring calculation time, and this is used as one matrix data 60. The two-dimensional image data 50 at an arbitrary rotation angle is selected from the two-dimensional image data 50 at each rotation angle in the data 60 and displayed on the display means 23b. Therefore, when displaying the two-dimensional image data 50 of the appearance of the structure at the selected arbitrary rotation angle on the display means 23b, the two-dimensional image of the appearance of the structure at the selected arbitrary rotation angle after being selected. The need to generate the data 50 from the three-dimensional graphic data 30 of the structure can be eliminated. Thus, when the two-dimensional image data 50 in an arbitrary direction is sequentially displayed on the display means 23a, the overall evaluation of the structure, that is, the appearance can be determined by instantaneously displaying the data.

  The data generation device 10 that generates the matrix-like data 60 and the two-dimensional image display device 20 that displays the two-dimensional image data 50 at an arbitrary rotation angle in the generated matrix-like data 60 are configured as separate devices. ing. Therefore, since the generation of the two-dimensional image data 50 based on the three-dimensional graphic data 30 having a large amount of calculation is performed by the data generation apparatus 10 which is a computer having a high processing speed, the two-dimensional image data 50 having a small amount of calculation is displayed. The display on 23b can be performed by a computer having a low processing speed.

  As described above, the structure appearance simulation method, the structure appearance simulation program and the structure appearance simulation apparatus, and the structure appearance simulation system according to the present invention are useful for predicting the appearance of the structure, In particular, it is suitable for predicting the appearance of a structure that is at least partially covered with a transparent part, such as a vehicular lamp.

It is a figure which shows the structural example of the external appearance simulation system of the structure concerning this invention. It is a figure which shows the flowchart of the external appearance simulation method of the structure based on this invention. It is a figure which shows the created three-dimensional figure data. It is a figure which shows the flowchart of a two-dimensional image data generation procedure. It is a figure which shows the relationship between three-dimensional figure data and environment BOX. FIG. 6 is an explanatory diagram for setting an environment BOX color; It is setting explanatory drawing of the parallel light source with respect to three-dimensional figure data. It is a figure which shows the example of the two-dimensional image data of the external appearance of the produced | generated structure. It is a figure which shows the flowchart of a matrix-like data production | generation procedure. It is a conceptual diagram of matrix-like data. It is a figure which shows the flowchart of a two-dimensional image selection data selection procedure. It is explanatory drawing of the displacement amount of an input means. It is a figure which shows the two-dimensional image data displayed by a display means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Appearance simulation system 10 Data generation apparatus 11 Processing part 11a Three-dimensional figure data creation part 11b Two-dimensional image data generation part 11c Matrix data generation part 12 Storage part 13 Input / output part apparatus 13a Input means 13b Display means 14 Input / output port 20 2D image display device 21 processing unit 21a matrix data acquisition unit 21b 2D image data selection unit 21c 2D image display unit 22 storage unit 23 input / output device 23a input unit 23b display unit 24 input / output port 30 3D graphic data 35 Outer lens (transparent part)
40 Environmental BOX
50 2D image data 60 Matrix data

Claims (7)

3D graphic data creation procedure for creating 3D graphic data of a structure at least partially covered with transparent parts;
A two-dimensional image data generation procedure for rotating the three-dimensional graphic data at a predetermined pitch and generating two-dimensional image data of the appearance of the structure at each rotation angle from the three-dimensional graphic data at each rotation angle by a ray tracing method; ,
Matrix-like data generation procedure for generating matrix-like data in which two-dimensional image data at each rotation angle is associated based on the rotation angle from the two-dimensional image data at each rotation angle;
2D image data selection procedure for selecting 2D image data at an arbitrary rotation angle from the matrix-like data;
A two-dimensional image display procedure for displaying the selected two-dimensional image data on a display means in the order of selection;
A method of simulating the appearance of a structure, comprising:   The method of simulating the appearance of a structure according to claim 1, wherein the two-dimensional data procedure rotates the three-dimensional graphic data at a predetermined pitch in each of two orthogonal directions.   The method of simulating the appearance of a structure according to claim 1 or 2, wherein the two-dimensional image data selection procedure selects two-dimensional image data at an arbitrary rotation angle based on a change amount of the input means.   The structure simulation method according to claim 1, wherein the structure that is at least partially covered with a transparent part is a vehicle lamp.   A computer program for causing a computer to execute the structural appearance simulation method according to any one of claims 1 to 4. 3D graphic data creating means for creating 3D graphic data of a structure that is at least partially covered with transparent parts;
2D image data generating means for rotating the 3D graphic data at a predetermined pitch and generating 2D image data of the appearance of the structure at each rotation angle from the 3D graphic data at each rotation angle by a ray tracing method; ,
Matrix-like data generating means for generating, from the two-dimensional image data at each rotation angle, matrix-like data that associates the two-dimensional image data at each rotation angle based on the rotation angle;
2D image data selection means for selecting 2D image data at an arbitrary rotation angle from the matrix-like data;
Display means for displaying the selected two-dimensional image data in the order of selection;
An apparatus for simulating the appearance of a structure, comprising: 3D graphic data creating means for creating 3D graphic data of a structure that is at least partially covered with transparent parts;
Two-dimensional image data generating means for rotating the three-dimensional graphic data at a predetermined pitch and generating two-dimensional image data of the appearance of the structure at each rotation angle from the three-dimensional graphic data at each rotation angle by a ray tracing method; ,
Matrix-like data generating means for generating, from the two-dimensional image data at each rotation angle, matrix-like data that associates the two-dimensional image data at each rotation angle based on the rotation angle;
A data generation device comprising:
Data acquisition means for acquiring matrix data generated in advance by the data generation device;
2D image data selection means for selecting 2D image data at an arbitrary rotation angle from the matrix-like data;
Display means for displaying the selected two-dimensional image data in the order of selection;
A two-dimensional image display device comprising:
A structure external appearance simulation system characterized by comprising:

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