JP2001325617A - Method and device for displaying flowing object on cg image - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for displaying a flowing object with a CG image by which a flowing object such as liquid which may exist inside or outside a building can be displayed with a CG image. SOLUTION: Concerning this method for displaying a flowing object on a CG image, the form data of the building are prepared and stored in a form data storage means 16a and a CG image data generating means 16b generates CG image data concerning the building by stopping or moving a viewpoint set to these form data. When displaying the CG image of a still picture or animation on a display means on the basis of these data, form data concerning the flowing object used or existent inside or outside the building are prepared as a function of time and stored in the form data storage means, and the flowing object is displayed on the display device as a CG image by stopping or moving a viewpoint set to these form data concerning the flowing object.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for generating shape data of a building such as a house by a computer and generating a CG image (computer graphics image) representing the inside and outside of the building based on the shape data. CG used to display a fluid such as water used inside or outside the building or existing in the CG image.
The present invention relates to a method and an apparatus for displaying a fluid by an image.

[0002]

2. Description of the Related Art Conventionally, when building buildings such as houses,
Based on the above three-dimensional shape data, a three-dimensional shape data of a house which is to be constructed and whose design has been completed is created, and a workstation installed in a presentation room (display room) in a sales office of a building company is used. There has been proposed a display method in which a house is displayed by a CG image on an appropriate display device such as a screen (Japanese Patent Application Laid-Open No. Hei 9 (1999)).
-106408). In this case, the operator of the building company or the like appropriately stops or moves the viewpoint set for convenience with respect to each part of the building in which the three-dimensional shape data has been created, and thereby the building on the display device. It can be displayed as a still image or a moving image.

According to such a display method, a customer can perform on a CG image the same experience (so-called “walk-through”) that is similar to actually walking around inside and outside a house to be built. It is possible to extremely accurately examine whether the design of each part of the house is appropriate, and to appropriately change the design of the house based on the results of the walk-through.

[0004] Therefore, compared to a case where a house is constructed only by presenting a design drawing to a customer, when a correction or the like based on a walk-through using a CG image is performed, a design failure after the house is constructed is made. The number of complaints from customers, such as trouble and inconvenience of use, is greatly reduced, which is beneficial to both building companies and customers.

[0005]

By the way, conventionally, CG
The three-dimensional shape data created for generating an image is only data having a fixed shape, such as each room or furniture. Therefore, the objects actually displayed in the CG image are limited to those having a fixed shape, such as these rooms and furniture. Therefore, it has been a subject to make the description by the CG image closer to the real indoor and outdoor scenes.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method for displaying a fluid such as a liquid which may be present indoors or outdoors of a building by using a CG image. And an apparatus therefor. Therefore, the method for displaying a fluid according to claim 1 relates to the building by creating shape data of the building, storing the data in the shape data storage unit, and stopping or moving the viewpoint set for the shape data. When the CG image data is generated by the CG image data generating means and the CG image which is a still image or a moving image is displayed on the display means based on the data, the shape related to the fluid which is used inside or outside the building or exists. The data is created as a temporal function and stored in the shape data storage means. The viewpoint is set or moved for the shape data relating to the fluid, and the fluid is displayed as a CG image on the display device. It is characterized by doing so.

[0007] A recording medium according to a second aspect is a computer-readable recording medium in which a program for executing the display method according to the first aspect is recorded.

According to a third aspect of the present invention, there is provided a display device for displaying a fluid by using a CG image, wherein the shape data storage means for storing the shape data of the building, and the viewpoint set with respect to the shape data is stopped or moved to thereby stop the building. A display device having a CG image generating means for generating a CG image which is a still image or a moving image, and a display means for displaying the generated CG image. Shape data is created as a temporal function and stored in the shape data storage means, and the liquid is displayed as a CG image on the display device by stopping or moving the viewpoint set for the shape data relating to the fluid. And a control unit for causing the control unit to perform the control.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the display room 1 is provided with pivotable doors 2 near two corners thereof, and is provided with a vertically movable blind 3 on a rear wall 3 (lower part in FIG. 2). While a vertically long window 4 having 4a is formed, a rectangular screen 5 is fitted in the wall 3 at the front (upper part in FIG. 2). The screen 5 (display means) is, for example, a large screen having a size of about 100 inches or more (the number of pixels is, for example, about 1280 × 1024 dots or more).

A projector 7 (projector) having, for example, three projection tubes 6 is installed near the ceiling of the rear wall 3 of the display room 1, and a projection image is projected from the projector 7 toward the screen 5. It has become so. Note that a separate projection chamber may be provided on the back side of the screen 5 to project from the back side of the screen 5.

In the display room 1, a plurality of chairs 8 and a table 9 for use by a customer K or the like who watches a CG image projected on a screen 5 are arranged. Is provided with a workstation 11 (computer) for creating a CG image relating to the house that the customer K intends to build and displaying it on the screen 5. The workstation 11 includes a display device 12 (CRT: Cathode Ray Tube or the like) as a display means for an operator S of a building company to view a CG image or the like, and a keyboard 13 and a mouse 14 as input devices. .

Below the auxiliary table 15 disposed near the corner of the display room 1, an arithmetic processing unit 16 forming the main body of the workstation 11 is installed. 5 for appropriately printing an image displayed on the display 5
A scanner 18 for taking in an image is mounted on the workstation 11.

As shown in FIG. 3, the arithmetic processing unit 16 includes a shape data storage means 16a for storing shape data of a building created based on external inputs from a keyboard 13, a mouse 14, etc. Means 16a
CG image data generating means 16b for generating CG image data for displaying a CG image related to the building by stopping or moving a viewpoint V (described later) set for the shape data stored in A control unit 16c for controlling the shape data storage unit 16a and the CG image data generation unit 16b is provided.

The arithmetic processing unit 16 creates three-dimensional shape data representing a house (building) by creating a floor plan or the like representing the floor plan of each floor of the house (building) and the arrangement of equipment and the like. House data creation program P
1. A CG image generation program P2 for drawing each part of the house as a moving image or a still image on the screen 5 or the like based on the three-dimensional shape data, and a time-varying shape of a fluid such as a liquid. Fluid shape data creation program P for creating three-dimensional shape data for
3 are installed from an appropriate recording medium such as a CD-ROM. Processing such as creation of shape data and generation of a CG image is performed in addition to the workstation 11 described above.
A so-called personal computer can also be used.

Hereinafter, a procedure for displaying a CG image in the display room 1 will be described. As shown in FIG. 4, before the customer K visits the display room 1, the operator S of the building company displays a plan view of each floor of the house H to be built by the customer K on the workstation 11.
Are created using the tools T (buttons, selection columns, etc.) displayed in the tool display area A2 on the right side in the image display area A1 of the plan view creation screen displayed on the display device 12 of FIG. This plan view is stored in the shape data storage means 16a.

Although the procedure for creating the plan view is not described in detail, "room name" and "area" are designated using the tools T displayed in the tool display area A2, and the image display area is designated. Mouse 1 is the position where the "room" is located in A1.
The floor plan can be designed simply by designating with 4 or the like. In addition, "type" of "equipment" to be arranged in each room
The equipment can be arranged only by specifying the position to be arranged.

Since each room and equipment used in the above-described design are created in advance as three-dimensional shape data including height dimensions, it is only necessary to create a plan view as shown in FIG. 4 for each floor of the house. Then, three-dimensional shape data of houses and equipment are created, and processing such as coloring is performed on the three-dimensional shape data as necessary.

Note that instead of creating three-dimensional shape data of the house on the workstation 11, CAD data is separately prepared in advance.
The house drawing data (three-dimensional shape data) created by the system or the like may be imported to the workstation 11 and used.

A walk-through procedure performed when the customer K visits the display room 1 will be described below. First, the principle of displaying the inside and outside of a house as a still image or a moving image based on the shape data represented by the plan view or the like will be briefly described.

If the three-dimensional shape data representing a house is simplified and corresponds to, for example, the shape shown by D in FIG. 5, the viewpoint is V, and the gazing point is U. The direction is from V to the gazing point U.

When generating an image when the viewing direction E is viewed from the viewpoint V as a CG image, a quadrangular pyramid F corresponding to a predetermined viewing angle is set with the viewing direction E as the center line in the horizontal direction and the vertical direction. Then, a two-dimensional image obtained by projecting a region included in the quadrangular pyramid F in the three-dimensional shape data D onto a projection plane G (a cross section of the quadrangular pyramid F) is cut out, and an image in the projection plane G (see FIG. H section) is displayed as a walk-through CG image Q on the screen 5 or the like in FIG.

The calculation for generating the CG image Q based on the viewpoint V and the line-of-sight direction E is executed by the CG image generating program P2. In addition, for example,
When the viewpoint V is advanced, the area included in the quadrangular pyramid F in the three-dimensional shape data D is reduced, so that the CG image Q depicts a state closer to the house. In this way, according to the forward or backward movement of the viewpoint V or the change of the line of sight E, the inside and outside of the house is displayed as a moving image or a still image by the CG image.

Hereinafter, a specific walk-through procedure will be described. When the walk-through button B1 is clicked in the tool display area A2 in FIG. 4, the walk-through screen in FIG. 6 is displayed. The created plan view is reduced and displayed in the sub-window A3 of the walk-through screen. Here, the operator S sets the viewpoint V and the gazing point U, which are the reference of the CG image generation, so that the viewpoint V is changed from the viewpoint V. A virtual image when the gazing point U is viewed is displayed in the image display area A1 as an initial screen of the walk-through by the CG image. Here, a walk-through screen when the viewpoint V and the gazing point U are set in the living room is illustrated.

At the time of the walk-through, the operator S operates the tool display area A2 such as “forward”, “backward”, “left rotation”, “right rotation”, “upward rotation”, “downward rotation”, etc. When the movement of the viewpoint V and the change of the line of sight E described above are performed by appropriately clicking the buttons B2 to B7, the viewpoint V and the line of sight E are displayed on the image display area A1 and the screen 5 accordingly. According to the change, the interior of the house or the like is displayed as a moving image or a still image by the CG image Q.

Normally, only the image display area A1 and the sub-window A3 are displayed on the screen 5, and the tool display area A2 is not displayed. That is, FIG. 6 and subsequent figures show the display device 1 viewed by the operator S.
2, the display contents of the image display area A1 and the sub-windows A3 are different from those of the display device 1 at each time.
2 and the screen 5 are common.

When the operator S clicks the "forward" or "backward" button B2, B3 on the display device 12, the viewpoint V moves forward or backward, and although not shown, the CG is displayed in the image display area A1 and the screen 12 (not shown). The image Q will be enlarged or reduced. FIG. 7 shows a state where the viewpoint V is advanced from the state of FIG. Further, when the "left rotation" or "right rotation" button B4, B5 or the like is clicked, the line-of-sight direction E changes to the left or right, and the CG displayed on the image display area A1 and the screen 5 accordingly. The image changes.

Next, a procedure for displaying a fluid such as a liquid in a CG image during a walk-through or the like will be described. For example, as shown in FIG. 8, when the faucet J1 of the water supply in the kitchen is displayed as a CG image on the screen 5 or the like, and it is desired to display a state in which the water W flows down from the faucet J1, for example, an image display After placing the cursor (not shown) on the faucet J1 in the area A1 and clicking the mouse 14, the user clicks the fluid display button B8 in the tool display area A2.

As a result, as shown in FIG.
The appearance of the water flowing down from the sink S is displayed by the CG image. In this case, for a fluid such as water, it is necessary to create shape data as a temporal function and store it in the shape data storage unit 16a. However, here, since the shape data indicates the water flowing down from the faucet J1, the shape data is constant as long as the flow rate does not change.
A CG image may be displayed using predetermined shape data prepared in advance. That is, according to the movement of the viewpoint V, C
This can be dealt with by generating G image data and displaying a moving image including a depiction of water flowing down from the faucet J1.

In the tool display area A2, selection buttons B9a to B9c for switching the flow rate of water flowing out of the faucet J1 are displayed by a pop-up menu or the like. By clicking one of the buttons B9a to B9c, The flow rate can be switched in multiple stages such as "small", "medium", "large".

In this case, the shape data representing the water flowing down from the faucet J1 changes according to the selected flow rate,
The change in the outflow amount of water is represented on the CG image accordingly. Also in this embodiment, a change in the shape data due to a change in the flow rate can be considered as a temporal function. The flow rate can be switched steplessly using a cursor key (not shown) on the keyboard 13 or the like.

Next, in a state where the bathroom is displayed with a CG image as shown in FIG. 10, when it is desired to describe a state in which hot water or cold water flows into the bathtub T with a CG image, the image is displayed on the image display area A1. After clicking faucets J2 and J3 for hot or cold water, click the fluid display button B8. Thereby, as shown in FIG. 11, for example, a state in which the hot water H flows into the bathtub T is displayed.

Also in this case, by appropriately clicking buttons B9a to B9c displayed by a pop-up menu or the like, the flow rate can be switched to multiple stages such as "small", "medium", and "large". Here, the water level of the hot water H stored in the bathtub T, in other words, the shape data indicating the shape of the hot water H in the bathtub T is obtained as an integral value of the change rate of the water level.

Since the rate of change of the water level is obtained by dividing the flow rate by the horizontal cross-sectional area of the bathtub T, when the horizontal cross-sectional area of the bathtub T is constant regardless of the height position in the bathtub T,
The rate of change of the water level is also constant. On the other hand, when the horizontal cross-sectional area of the bathtub T changes according to the height position in the bathtub T, the change rate of the water level is inversely proportional to the horizontal cross-sectional area of the bathtub T. Therefore, the shape data of the hot water in the bathtub may be obtained in advance as a function of time according to the horizontal sectional shape, the horizontal sectional area, and the like of the bathtub T and stored in the shape data storage unit 16a.

In the above-described embodiment, a case has been described where the appearance of water or hot water flowing out of the faucets J1 and J2 is displayed in a CG image. In addition, various fluids can be displayed in a CG image. For example, it is possible to display, by a CG image, a state in which hot water or the like gushes from a shower head in a bathroom or the like, or a state in which water flows in a flush toilet.

[0035]

According to the first aspect of the present invention, there is provided a method for displaying a fluid, wherein shape data of a building is created and stored in shape data storage means, and a viewpoint set for the shape data is stopped or moved. When the CG image data relating to the building is generated by the CG image data generating means and the CG image which is a still image or a moving image is displayed on the display means based on the data, the CG image data is used inside and outside the building,
Alternatively, shape data relating to the existing fluid is created as a temporal function and stored in the shape data storage means, and the viewpoint set with respect to the shape data relating to the fluid is stopped or moved to thereby generate a CG image of the fluid. Therefore, for example, even a fluid such as a liquid that changes in shape over time can be described by a CG image.
Thereby, the description of the inside and outside of the building by the CG image can be made more realistic.

Since the recording medium of claim 2 is a computer-readable recording medium on which a program for executing the display method of claim 1 is recorded, by installing the program from the recording medium on a computer, The useful display method described above can be executed.

According to a third aspect of the present invention, there is provided a display device for displaying a fluid by a CG image, wherein the shape data storage means for storing the shape data of the building, and the viewpoint set with respect to the shape data is stopped or moved to thereby stop the building. A display device having a CG image generating means for generating a CG image which is a still image or a moving image, and a display means for displaying the generated CG image. Shape data is created as a temporal function and stored in the shape data storage means, and the liquid is displayed as a CG image on the display device by stopping or moving the viewpoint set for the shape data relating to the fluid. Control means for
For example, even a fluid, such as a liquid, whose shape changes over time can be described by a CG image.
It is possible to make the depiction by the image closer to the real scene inside and outside the house.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a display room used in an embodiment of the present invention.

FIG. 2 is a schematic plan view showing the display room.

FIG. 3 is an explanatory diagram showing a schematic internal configuration of an arithmetic processing unit in the display room.

FIG. 4 is an explanatory view showing how a plan view of a house is created by the arithmetic processing unit.

FIG. 5 is an explanatory diagram showing a principle of generating a CG image by the arithmetic processing device.

FIG. 6 is an explanatory diagram showing a state in which a walk-through using a CG image is performed inside the house.

FIG. 7 is an explanatory diagram showing a state where a viewpoint is advanced by the walk-through.

FIG. 8 is an explanatory diagram showing a state in which the inside of the kitchen is displayed during the walk-through.

FIG. 9 shows a state in which water flows down from a faucet in the kitchen.
FIG. 4 is an explanatory diagram illustrating a situation in which a G image is depicted.

FIG. 10 is an explanatory diagram showing a state in which a bathroom is displayed during the walk-through.

FIG. 11 is an explanatory diagram showing a state in which hot water flows down from a faucet in the bathroom in a CG image.

[Explanation of symbols]

 11 workstation (computer) 16a shape data storage means 16b CG image data generation means 16c control means

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5B046 AA03 CA04 DA08 FA15 GA01 JA04 5B050 BA07 BA08 BA09 BA11 BA13 CA07 EA24 FA02

Claims (3)

[Claims] 1. CG image data relating to the building is generated by generating shape data of the building, storing the generated data in a shape data storage unit, and stopping or moving a viewpoint set with respect to the shape data. Means, and when displaying a CG image which is a still image or a moving image on the display means based on the data, creates shape data relating to a fluid used inside or outside the building or existing as a temporal function. The fluid is displayed on the display device as a CG image by stopping or moving the viewpoint set for the shape data relating to the fluid. A method for displaying a fluid using a CG image. 2. A computer-readable recording medium in which a program for causing a computer to execute the display method according to claim 1 is recorded. 3. A shape data storage means for storing shape data of a building, and a CG image which is a still image or a moving image of the building is generated by stopping or moving a viewpoint set for the shape data. In a display device having a CG image generation means and a display means for displaying the generated CG image, the shape data relating to a fluid used or present inside or outside the building is created as a temporal function, and CG characterized by comprising control means for storing the liquid in a shape data storage means and causing the display device to display the liquid as a CG image by stopping or moving a viewpoint set for the shape data relating to the fluid. An image display device for fluids.