JPH10222701A - Computer graphic device and generating method for image data - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten rendering calculating time after securing the picture quality of specified parts through a computer graphic device. SOLUTION: The computer graphic device generates shape data F(i, A) to F(i, E) or the like at the plural levels of accuracy concerning one part. Based on selection data S(i, X), any one be of shape data F(i, A) to F(i, E) is selected and three-dimensional image data are generated by executing rendering while combining plural pieces of these data. As the selection data S(i, X), there are viewpoint data Sa(i, X) showing the distance from the viewpoint of camera to respective parts P(i), size data Sb(i, X) and importance degree data Sc(i, X).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer graphic device used for displaying an image of, for example, a product placed in a living space, and a method of creating image data.

[0002]

2. Description of the Related Art Conventionally, use of a computer graphic device has been studied as a means of displaying goods on a three-dimensional screen and promoting the purchase of the goods. In order to create image data in such a computer graphic device, shape data in which the appearance of each part is created by polygons or polylines is created, texture data representing the appearance of the shape data is created, and light sources and camera positions ( After setting the (viewpoint position), image data is created by executing rendering by a method such as a Z-buffer method or a ray tracing method. That is, in the rendering, the brightness of each surface of the three-dimensional figure is calculated in accordance with the setting of the light source, thereby creating image data in which a three-dimensional space based on perspective is projected onto a two-dimensional surface.

In order to change the accuracy and rendering time of image data in the above computer graphic apparatus, rendering conditions such as the number of ray tracings are changed while the shape data and the like are unchanged, or the accuracy of shape data and the like is changed. This is done by creating other data.

[0004]

However, when the precision of the image data is changed in this way, there has been a problem that the rendering time becomes longer and it takes time to replace all the data with other data.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a computer graphic apparatus and a method for creating image data which can shorten the rendering time while ensuring the image quality of a specific part. With the goal.

[0006]

Means for Solving the Problems and Action / Effect of the Invention According to a first aspect of the present invention, there is provided a computer graphic apparatus for creating three-dimensional image data using a computer. A part data storage means for creating a plurality of part data with a precision including a plurality of shapes and textures for one part constituting a part of the part data, and storing a plurality of part data groups each including the part data; Selection data storage means for storing selection data for selecting one part data group stored in the storage means from another part data group; and selection data stored in the selection data storage means from the part data group And a plurality of parts data selected by the selecting means for selecting one part data based on the The combined viewing and rendering means for generating three-dimensional image data by performing a rendering, comprising the.

A computer graphic device according to the present invention is a device for creating a three-dimensional image based on a plurality of parts, and stores a plurality of parts data groups in a parts data storage means. This part data group is composed of part data created with a plurality of precisions for one part. The selection data is stored in the selection data storage means. The selection data is data for selecting one part data group from another part data group. The selection means is based on the selection data. Then, one part data is selected from the part data group. Then, the plurality of parts data selected by the selection unit are combined by the rendering unit and rendered to create a three-dimensional image.

In such a computer graphic apparatus, for parts that do not require precise precision, three-dimensional image data is created by selecting low-precision part data based on selection data, so that unnecessary calculations are omitted. The load on the computer can be reduced. Thus, the reduced burden on the computer can be directed to shapes that require precise drawing, and the calculation time required for rendering can be reduced. In other words, rendering can be performed in a short time by selecting the most appropriate part data for the part in consideration of the two factors of the image quality and the rendering time based on the selection data.

As the selection data, it is possible to use data representing the importance of the part relatively, data representing the size of the part, and data representing the distance from the viewpoint to the part. For example, when a computer graphic device is used to sell a product, by selecting high-precision part data for a product of high importance to be sold, the product is created with three-dimensional image data of higher quality than other parts. On the other hand, the rendering time can be shortened while securing the image quality of important parts by using a low-precision three-dimensional image for the parts constituting a part of the background.

According to a second aspect of the present invention, there is provided a method for creating image data for creating three-dimensional image data using a computer. Creating a part data group with the part data as one group; creating sort data for sorting the one part data group from other part data groups; And a step of selecting one part data based on the selection data, and a step of creating the three-dimensional image data by performing rendering by combining the selected plurality of parts data. How to create data.

According to another aspect of the present invention, in a storage medium storing software for creating three-dimensional image data using a computer, one part constituting a part of the three-dimensional image data is provided with a plurality of accuracies. A process of creating part data and creating a part data group with the part data as one group; a process of creating sorting data for sorting the one part data group from another part data group; A process of selecting one part data from the data group based on the selection data;
A storage medium storing a process of creating three-dimensional image data by performing rendering by combining the selected plurality of part data may be used.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the configuration and operation of the present invention described above, a preferred embodiment of the present invention will be described below.

FIG. 1 is a system configuration diagram showing a computer graphic device 10 according to one embodiment of the present invention. The computer graphic device 10 is mainly configured with a central control unit 12, and includes a keyboard 14, a mouse 16, a digitizer 18 and the like as input means to the central control unit 12, and an image display device 20 and a hard disk as output means. 22, an optical disk device 24, and the like, which are controlled via an input / output control unit 26. The hard disk 22 stores software for realizing computer graphics.

The central control unit 12 has various functions for creating and drawing a three-dimensional image based on the software. When these functions are represented by a work flowchart shown in FIG. Model creation step S10
A texture data creating step S12, a light source data creating step S14, a camera position setting step S16, a selection data creating step S18, and a rendering parameter setting step S2.
0 and a rendering execution step S22.

The shape model creation step S10 is a step of creating parts (basic figures) to be displayed on the image display device 20, layout diagrams for arranging these parts, and the like using polylines and polygons. The shape model creation step S10 is performed according to various commands and tools that can be input interactively with the keyboard 14 and the mouse 16 while viewing the display screen of the image display device 20.

FIG. 3 shows a drawing area 30 used in a shape model creation step S10 displayed on the image display device 20,
FIG. 3 is a diagram showing a tool box 32 and a menu bar 34 in which commands are arranged. The drawing area 30 is an area for displaying a top view, a front view, a side view, a perspective view, and the like. In the drawing area 30, a command in the tool box 32 or the menu bar 34 is selected with the mouse 16 to display a layout view or the like. Create parts. The commands of the tool box 32 include various instructions for drawing a plane figure such as a polygonal line, a curve, a circle, and an ellipse for drawing parts and the like, and a three-dimensional figure such as a sphere and a cone.

In the shape model creating step S10, for example, when a bathroom as shown in FIG.
A layout diagram is created in the drawing area 30, and parts such as a bathtub and a caran to be arranged in the layout diagram are created. At this time, each part is drawn with a plurality of precisions using polygons and polylines. That is, FIGS. 5 and 6 illustrate cubes with chamfered corners, and FIG. 6 depicts the square corners more smoothly than FIG. 5 with higher accuracy. Each part P (i) for which a bathtub or the like is created in this manner, where i is a natural number. ｝ Is drawn with multiple precisions. Here, if each part P (i) is drawn at five levels (A to E), a data structure as a part data group shown in FIG. 7 is obtained. That is, for each part P (i), shape data F (i, A) to shape data F (i, E) are created as five data, and the shape data F (i,
A) is the shape data F (i,
E) is stored on the hard disk 22 as the coarsest data. Note that all of the shape data F (i, A) to F (i, E) need not be created, and may be null data.

The texture data creating step S1 shown in FIG.
2 is the shape data F (i, A) to the shape data F (i, A) of the drawing area 30 (FIG. 3) displayed on the image display device 20.
In step E), a texture is input based on the texture setting window 40 shown in FIG. The texture setting window 40 can be displayed on the image display device 20 by selecting a command on the menu bar 34 shown in FIG. 3, and includes a color material 41, a color type 42, a gloss 43, a transparency 44, and a metal 45. And commands for setting parameters such as roughness 46, specularity 47, and refractive index 48. To set these parameters, select a list box Lb or a color palette (not shown), or
This is performed by clicking the slide bar Sb or by inputting a numerical value into the text box Tb.

Here, the color material 41 is a command for selecting a material to be attached to the surface of the part P (i) from a menu such as wood, resin, metal, and glass. The color type 42 is a part P from a color palette displaying a large number of hues and saturations.
This is a command for selecting a single color attached to (i). The color luster 43 is a command for selecting the luster brightness of the part P (i), and is set between 0 (low luster) and 100 (high luster). As for the transparency 44, the light
This is a command for selecting the degree of transmission through (i).
(Not transmitted) to 100 (transmitted).
Further, the metallic property 45 is a command for selecting the metallic glossiness which is set when a metal is selected for the part P (i), and is set from 0 (low) to 100 (high) to irradiate light. When the part P (i) is closer to 0, the gloss color approaches the light color, and as the part P (i) is closer to 100,
The luster color becomes closer to the color of the object. The roughness 46 is a command for selecting the degree of reflection of the surrounding scene, and is set between 0 (dull reflection) and 100 (clear reflection). The closer to 0, the less the surrounding scene is reflected. The closer to, the more evenly reflected. The specularity 47 is a command for selecting the degree of reflection of the surrounding scene, and is 0 (non-specular) to
Set between 100 (perfect mirror), the closer to 100,
Reflection increases. The refractive index 48 is a command for selecting the degree of refraction of light when light is transmitted when a transparent material such as glass is selected. Has a large refractive index.

If these texture data are also set at five levels as shown in FIG. 7, the texture data C (i,
A) to shape data F as texture data C (i, E)
The data is stored in the hard disk 22 in association with (i, A) to the shape data F (i, E).

The light source data creation step S14 shown in FIG.
This is a step of setting a light source in a three-dimensional space, and is set by input of the mouse 16 or the like based on a light source setting window 50 displayed on the image display device 20 shown in FIG. 9, a light source setting window 50 includes a light source type selection command 51 for selecting a light source type, a light intensity command 52 for setting the light source intensity, a light source color command 53 for setting the color of the light source, and a light source arrangement command 54. Have.

Here, the types of light sources that can be selected by the light source type selection command 51 are, for example, parallel light, ambient light, point light source, spotlight, and light emitter. Parallel light is a block of light rays traveling in the same direction, and is set as a light source that does not diffuse and does not attenuate.

The ambient light is light for making the entire screen uniform and having a certain level of brightness. That is, in the image calculation of the computer, since the diffused light, which is a natural phenomenon, cannot be faithfully reflected, a portion not directly exposed to light becomes completely black. Therefore, environmental light is used to prevent this.

A point light source is a block of light rays that progress spherically from a certain point, and is a light source that attenuates as it moves away from the point light source due to diffusion. A spotlight is a block of light rays that travels in a conical shape from a certain point, and is a light source that attenuates as it moves away from the spotlight due to diffusion. The illuminant is a light source representing a surface light source such as a fluorescent lamp.

The light source arrangement command 54 of the light source setting window 50 is a command for setting the position of the light source, the direction and angle of the light, the range of the light, and the like in a layout diagram. That is, FIGS. 10 to 12 are explanatory diagrams for explaining the arrangement of the parallel light, the point light source, and the spotlight, respectively.

That is, as shown in FIG.
The arrangement of 1 is performed by setting the light direction d1. Further, as shown in FIG. 11, the point light source LT2 sets the light source position and sets an attenuation range in which the light intensity gradually decreases by a concentric circle centered on the point light source LT2. At this time, the light attenuation range is such that, assuming that the range in which light can reach without attenuation is 100%, the outer edge to which light reaches is set to 0, and the interval between them is set by each attenuation amount.

Further, as shown in FIG. 12, the spotlight LT3 sets the position of the light source, the range of the cone having the position of the light source as the vertex, and the angle, and the range in which the light intensity gradually decreases. It is set as a cone with LT3 as the vertex. Similarly to the point light source LT2 in FIG. 11, the attenuation range of the spotlight LT3 is set to 1
If it is set to 00%, the outer edge to which light does not reach is set to 0%, and the attenuation during that period is set in%.

These light source data are also represented by a data structure as a part data group shown in FIG. 7, and when set at five levels, the light source data L (j, A) to the light source data L
It is stored on the hard disk 22 as (j, E). Here, j is a natural number representing the number of the light source data.

The camera position setting step S1 shown in FIG.
Reference numeral 6 denotes a step for setting the viewpoint position of the layout diagram, which is set based on the camera setting window 60 shown in FIG. The camera setting window 60 includes a viewpoint setting command 61, a gazing point setting command 62, and a zoom setting command 63. FIG. 14 is a diagram in which the viewpoint is set by a layout diagram. That is, FIG. 14 is a diagram illustrating a state in which the camera position of the part P (1) is set from the camera viewpoint Pc to the gazing point Pd.

The viewpoint setting command 61 is a command for changing the current camera viewpoint Pc while looking at the layout diagram shown in FIG.
After clicking at 6, the camera viewpoint Pc can be set by dragging with the mouse 16 and moving the camera viewpoint Pc up, down, left and right.

Similarly, the gazing point setting command 62 is a command for changing the position of the current gazing point Pd. After clicking the gazing point setting command 62, the gazing point Pd is moved so as to look up, down, left and right. Can be set by In addition, the zoom setting command 63 is displayed on the image display device 2.
This command is used to enlarge or reduce the range described by 0, that is, to change the viewing angle θ.

Further, the sorting data creating step S1 shown in FIG.
8 is a step of interactively setting the relative selection data S (i, X) shown in FIG. 16 for each part P (i). As shown in FIG. This is performed based on the possible selection data setting window 70. In FIG. 15, the sorting data setting window 70
Is a viewpoint distance setting command 7 for the part P (i).
1. Size setting command 72, importance setting command 73
And so on.

The viewpoint distance setting command 71 interactively sets the relative distance from the camera viewpoint Pc to the part P (i) on the layout diagram.
In the five levels, A is set to the maximum and E is set to the minimum. When the viewpoint is set in the camera position setting step S16, the initial value is
The viewpoint distance level is calculated and set to one of A to E based on the distance between the center of gravity of the part P (i) and the camera viewpoint Pc.

The size setting command 72 is used to set the relative size of the part P (i) on the layout diagram. At five levels A to E, A is the maximum and E is the minimum. To be set. If a dimension has been input to the part P (i) at the time of the shape model creation step S10, each part P (i) is set as an initial value.
The size level is calculated and set to one of A to E based on the surface area of (i).

Further, the importance setting command 73 of the part P (i) is set to a plurality of parts P (i) displayed on the layout diagram.
The relative importance is set with respect to (i), and A is set to the maximum and E is set to the minimum in five levels of A to E.

The selection data S (i, X) set by the viewpoint distance setting command 71, the size setting command 72, and the importance setting command 73 are, as shown in FIG. 16, viewpoint data Sa (i, X), Size data Sb (i,
X), parts P as importance data Sc (i, X)
Stored in connection with (i). Here, X is a variable representing the accuracy of each selection data, and takes a value of A to E. Note that the light source data L (j, A) to the light source data L (j, E)
Is also added to the selection data, that is, the viewpoint data Sa
(J, X), size data Sb (j, X), and importance data Sc (j, X). Note that the light source data L
Selection data S (i, X) added to (j, A) to light source data L (j, E) are size data Sb for parallel light or the like.
(J, X) is null data.

The rendering parameter setting step S20 shown in FIG. 2 is a step of selecting a rendering method and interactively inputting various parameters at the time of rendering. As shown in FIG. This is performed based on the rendering setting window 80 that can be set.

In FIG. 17, a rendering setting window 80 includes an image size setting command 81, a resolution setting command 82, a rendering setting command 83, and the like. The image size setting command 81 is a command for setting the size of the rendering screen displayed on the image display device 20, and is set with the number of dots in the vertical and horizontal directions.

The resolution setting command 82 sets the resolution of an image to be displayed on the image display device 20 at five levels of A to E, that is, A is a high resolution and E is the lowest resolution.

The rendering setting command 83 is a command for selecting a rendering method such as a well-known Z buffer method and a ray tracing method. That is, the Z-buffer method is a method of determining the position of the Z coordinate axis between a plurality of polygons on a pixel-by-pixel basis and selecting and rendering a pixel closest to the viewpoint position side. In the ray tracing method, a light beam is emitted from a light source and a part P
This is a method of trying to simulate, on a computer, an optical phenomenon of connecting an image that is reflected at (i) and reaches the camera viewpoint Pc (image is reflected on the camera).

The Z-buffer method can perform processing at a higher speed than the ray-tracing method, but cannot perform processing such as light reflection, transmission, shadow, and anti-aliasing accurately, and has low image quality. On the other hand, ray tracing method can calculate optical phenomena such as reflection, transmission and refraction when tracing light rays, so it can express texture of glass and metal well.
The feature is that the processing time is long.

When the ray tracing method is selected, option setting is permitted. As option settings, a dither setting command 84, a ray tracing count setting command 85, a refraction count setting command 86, a reflection count setting command 87,
Each setting of the anti-aliasing level 88 is included, and although the image quality can be improved by these settings, the rendering time becomes long. Therefore, these conditions are interactively selected.

The dither setting command 84 is used when full color is not selected, that is, when 256 colors or 6 colors are selected.
In the case where 15,000 colors are set, intermediate colors are created to improve image quality.

The ray tracing number setting command 85 is a command for setting the number of times of tracing light branches when executing ray tracing. The refraction number setting command 86 is a command for setting the number of times of calculating the refracted light when executing ray tracing. The number-of-reflections setting command 87 is a command for setting the number of times of calculating the reflected light when executing ray tracing. The number of times of ray tracing, refraction, reflection and the like is set between 2 and 6 times, and the image quality improves as the number of times increases.

The anti-aliasing level 88 is a command for setting an anti-aliasing process for preventing a phenomenon that color boundaries are jagged or staircase, and the setting is “none”, “low” or “low”. It is set in five steps: medium and high. By setting this anti-aliasing, the quality of the rendered image can be improved.

When the rendering execution command 91 is clicked after creating such three-dimensional image data and setting rendering conditions, a rendering program is executed and a three-dimensional image as shown in FIG. 4 is displayed. The processing for displaying such an image will be described with reference to the flowchart shown in FIG. In this process,
For each of the n parts (1) to (n) created in the shape model creation step S10 and the like, one piece of shape data F based on the sorting data S (i, X) given in the sorting data setting window 70. Rendering execution processing is performed by selecting (i, A) to shape data F (i, E) and the like.

In FIG. 18, after the initialization of various variables, in step 102, the selection data setting window 70 is selected.
Based on the selection data S (i, X) set in (FIG. 15), shape / texture selection data T (i) is calculated based on the following equation (1). T (i) = F (ka1.Sa (i, X) + kb1.Sb (i, X) + kc1.Sc (i, X)) (1) Here, the shape / texture selection data T (i) is It is data used to select shape data F (i, A) to shape data F (i, E) and texture data C (i, A) to texture data C (i, E), and Sa (i). , X) indicates viewpoint data Sa (i, X), Sb (i, X) indicates size data Sb (i, X), and Sc (i, X) indicates importance data Sc (i, X). Show. ka1, kb2, kc3
Is a parameter for weighting the viewpoint data Sa (i, X). This shape / texture selection data T (i)
Takes the value of the function F having a parameter selected at five levels as a return value, that is, takes one of the values A to E.

In the following step 104, based on the value of the shape / texture selection data T (i), the shape data F (i,
A) to shape data F (i, E) and texture data C (i,
From A) to texture data C (i, E), one data is selected and read.

In the following step 106, the counter i is incremented, and in the following step 108, the steps 102 and 1 are performed for n parts P (i).
After the process of step 04 is performed, the process proceeds to step 110.

In the next step 110, light source selection data V (j) is calculated based on the following equation. V (j) = F (ka2.Sa (i, X) (2) + kb2.Sb (i, X) + kc2.Sc (i, X)) The light source selection data V (j) is the light source data L ( j,
A)-Data used to select the light source data L (j, E). As with the shape / texture selection data T (i), selection data S such as viewpoint data Sa (j, X) is used.
(I, X) and weighting parameters ka2, kb2,
Based on kc3, any one of A to E is taken.

In the following step 112, based on the value of the light source selection data V (j), one data is selected from the light source data L (j, A) to the light source data L (j, E).
Is read. Then, after the counter j is incremented in step 114, m
After it is determined that all the processes of the light source data L (j, X) have been completed, the process proceeds to step 120.

In step 120, the rendering is executed based on the data and the parameters set by the rendering setting window 80. This rendering creates an image by projecting a three-dimensional space based on perspective on a two-dimensional surface by calculating the brightness of each surface of the three-dimensional figure according to the setting of the light source. The image created in this process is displayed on the screen in steps, and is stored in the hard disk 2 as an image file.
2 is stored.

By such processing, a three-dimensional image as shown in FIG. 4 is created.
Regarding (i), for example, if the distance from the viewpoint is long or the importance is low, the selection data S (i,
Based on X), the rendering calculation is performed by selecting shape data F (i, E) with a short rendering calculation and low accuracy. That is, as shown in FIG. 19, for example, five of the plurality of shape data F (i, A) to F (i, E)
And sorting data S (i, X) such as distance from the viewpoint
, The shape data F (i, B) is selected and rendering is executed.

Therefore, the part P far from the viewpoint is
Regarding (i), the shape data F (i, E) is selected, the load on the central control unit 12 is reduced, the rendering time is shortened, and the part P (i) whose distance from the viewpoint is short.
For parts P (i) having a high degree of importance, the rendering is executed with high accuracy, so that computer graphic rendering can be executed at high speed without significantly deteriorating the image quality.

The present invention is not limited to the above embodiment, but can be implemented in various modes without departing from the gist of the invention. For example, the following modifications are possible.

In the above embodiment, the selection data S (i,
X), the shape data F (i, A) to the shape data F (i, X) using the viewpoint data Sa (i, X), the size data Sb (i, X), and the importance data Sc (i, X). E)
However, the present invention is not limited to this, and other parameters may be used as long as they affect the rendering speed of rendering.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing a computer graphic device 10 according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating image data processing.

FIG. 3 is an explanatory diagram showing a screen for creating a shape model.

FIG. 4 is a diagram showing an example of a three-dimensional image created by computer graphics.

FIG. 5 shows shape data F created in a shape model creation process.
Explanatory drawing which shows an example of (i, D).

FIG. 6 is an explanatory diagram showing an example of shape data F (i, A) having higher accuracy than FIG. 5;

FIG. 7 is an explanatory diagram illustrating a data structure such as shape data.

FIG. 8 is an explanatory view for explaining a texture setting window 40;

FIG. 9 is an explanatory diagram illustrating a light source setting window 50.

FIG. 10 is an explanatory diagram illustrating setting of parallel light as light source data.

FIG. 11 is an explanatory diagram illustrating setting of a point light source as light source data.

FIG. 12 is an explanatory diagram illustrating setting of a spotlight as light source data.

FIG. 13 is an explanatory diagram illustrating a camera setting window 60.

FIG. 14 is an explanatory diagram illustrating setting of a viewpoint position.

FIG. 15 is an explanatory diagram illustrating a selection data setting window 70.

FIG. 16 is an explanatory diagram illustrating a data structure of selection data.

FIG. 17 is an explanatory diagram illustrating a rendering setting window 80.

FIG. 18 is a flowchart illustrating rendering execution processing.

FIG. 19 shows shape data F (i, A) to shape data F.
Explanatory drawing for demonstrating the selection of (i, E).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Computer graphic apparatus 12 ... Central control part 14 ... Keyboard 16 ... Mouse 18 ... Digitizer 20 ... Image display apparatus 22 ... Hard disk 24 ... Optical disk apparatus 26 ... Input / output control part 30 ... Drawing area 32 ... Tool box 34 ... Menu bar 40 ... Texture setting window 41 ... Color material 42 ... Color type 43 ... Smoothness 44 ... Transparency 45 ... Metallic 46 ... Roughness 47 ... Specularity 48 ... Refractive index 50 ... Light source setting window 51 ... Light source type selection command 52 ... Light intensity Command 53 ... Light source color command 54 ... Light source arrangement command 60 ... Camera setting window 61 ... Viewpoint setting command 62 ... Point of interest setting command 63 ... Zoom setting command 70 ... Selection data setting window 71 ... Viewing distance setting command 72 ... Size setting command 73 … Importance setting command 80: Rendering setting window 81: Image size setting command 82: Resolution setting command 83: Rendering setting command 84: Dither setting command 85: Ray tracing number setting command 86: Refraction number setting command 87: Reflection number setting command 88: Anti-aliasing level 91: Rendering execution command

Claims (4)

[Claims] 1. A computer graphic device for creating three-dimensional image data using a computer, wherein each part constituting a part of the three-dimensional image data creates part data with accuracy including a plurality of shapes and textures. A part data storage unit that stores a plurality of part data groups each including the part data as a group; and a selection data unit that sorts one part data group stored in the part data storage unit from another part data group. Selection data storage means, a selection means for selecting one part data from the part data group based on the selection data stored in the selection data storage means, and a plurality of selection data selected by the selection means. Rendering that creates 3D image data by rendering by combining part data Computer graphic apparatus comprising: the grayed means. 2. The computer graphic device according to claim 1, wherein the part data is data including any of a part shape, a part texture, and a light source attenuation level. 3. The selection data according to claim 1, wherein the selection data is data representing a degree of importance of the part, data representing a size of the part, and a distance from a viewpoint for describing three-dimensional image data to the part. A computer graphic device comprising any of the data representing: 4. A method for creating image data for creating three-dimensional image data using a computer, comprising: creating part data with a plurality of precisions for each part constituting a part of the three-dimensional image data; A step of creating a part data group with the part data as one group; a step of creating selection data for sorting the one part data group from another part data group; and a step of sorting out the part data group. A step of selecting one part data based on the data; and a step of creating the three-dimensional image data by performing rendering by combining the selected plurality of parts data. How to create image data.