JPH08212385A - Cg data generating device and cg animation editing device - Google Patents

Abstract

PURPOSE: To provide a CG data generating device which can automatically generate CG data on a body from CAD data on the body and a CG animation editing device which can generate a CG animation at a high speed. CONSTITUTION: The CG data generating device 1 is equipped with an emission part 11 which emits a light beam to the CDA data on the body, a decision part 12 which judges the intersection of the emitted light beam and the CAD data on the body, and a generation part 13 which generates the CG data on the body by erasing body constituent parts judged not to cross the light beam from the CAD data on the body. And, the CG animation editing device 2 emits a light beam traveling from the outside to inside the body and a light beam traveling from the inside to outside the body individually by generation parts 21 and 22 to generate the CG data on two kinds of body in cases wherein the body is viewed from the inside and the outside by a generation part 24, and is equipped with a calculation part 27 which selects and uses one of the two kinds of CG data corresponding to a view point position to calculate the CG animation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a C which enables automatic creation of CG data of an object from CAD data of the object.
The present invention relates to a G data creation device and a CG animation editing device that enables high speed creation of CG animation by using the CG data creation device.

Recently, computer graphics (C
Due to the improvement of the animation technology of G), the use of CG simulation called walkthrough that allows the user's line of sight to move around in the virtual world and easily experience the virtual world is increasing. The use of what is called a landscape simulation is expanding, where the view of an object is limited to some extent and the user's viewpoint freely moves around to experience the world.

In order to make such a CG simulation practical, it is necessary to easily create more realistic CG data of an object.

[0004]

2. Description of the Related Art In a CG animation editing apparatus that executes CG animation editing processing, CG data of an object is created, and CG animation of the object is created based on the CG data.

Since it is difficult to create this CG data from the beginning and it is difficult to create a real one, recently, graphic data created by CAD has been used. Things are going on. This CA
Since the graphic data of D is created for manufacturing,
Graphic data elements (polygons) that are invisible
It also has a lot of unnecessary data for display such as detailed shapes of distant objects.

However, in order to generate a CG animation, it is necessary to determine the intersection between the graphic data and the line of sight, calculate the illuminance at the apex position of the graphic data, and determine the intersection between the ray for shading and the graphic data. Yes, the larger the number of graphic data elements, the greater the amount of calculation. Therefore, if the graphic data created by CAD is used as it is as the CG data, the drawing speed in the CG is significantly reduced.

When CG data is created using CAD graphic data, it is necessary to delete unnecessary portions of CAD graphic data. For example, a box made with 6 plates is
As shown in FIG. 1, 36 quadrangular polygons are created, but as CG data, ideally, as shown in FIG.
As shown in FIG. 2, since it can be expressed by six quadrangular polygons, unnecessary portions are deleted from the CAD graphic data shown in FIG. 11 to obtain the CG data shown in FIG. 12 or CG data close to it. It is necessary to create it.

In response to this request, in the past, the CAD graphic data was used to generate the CG as it is, and the user saw the CG-converted image and predicted the likely locations of unnecessary polygons, By using this method, unnecessary parts are searched out from the CAD graphic data and deleted. That is, conventionally, a method has been adopted in which a user manually performs a process of deleting an unnecessary portion of CAD graphic data.

[0009]

However, when the conventional method of selecting and removing unnecessary polygons by CG animation by hand is adopted as in the conventional method.
There is a problem that it imposes a heavy load on the user. Then, every time new CAD graphic data is added, there is a problem in that, each time new CAD graphic data is added, an unnecessary portion of the added graphic data must be deleted.

The present invention has been made in view of the above circumstances, and provides a new CG data creating apparatus for automatically creating CG data of an object from CAD data of the object, and creating the CG data thereof. An object of the present invention is to provide a new CG animation editing device that enables high-speed creation of CG animation by using the device.

[0011]

FIG. 1A shows the principle configuration of a CG data creating apparatus 1 constructed according to the present invention, and FIG.
FIG. 1B shows the principle configuration of the CG animation editing device 2 constructed according to the present invention.

The CG data creating apparatus 1 of the present invention, the principle configuration of which is shown in FIG. 1A, automatically creates CG data of an object from CAD data of the object. In addition, a reading unit 10 that reads the CAD data of the object, a generation unit 11 that generates a plurality of virtual light rays toward the CAD data of the object, and an intersection determination between the light rays generated by the generation unit 11 and the CAD data of the object The determination unit 12 that executes the process and the generation unit 13 that generates the CG data of the object using the determination result of the determination unit 12 are provided.

On the other hand, the CG animation editing apparatus 2 of the present invention, the principle configuration of which is shown in FIG. 1B, creates CG data of an object according to the present invention, and uses it to create a CG animation at high speed. In order to realize this, the reading unit 20 that reads the CAD data of the object
And a first generation unit 21 that generates a plurality of virtual light rays from the outside of the object to the inside of the CAD data of the object.
And a second generation unit 22 that generates a plurality of virtual light rays from the inside of the object to the outside with respect to the CAD data of the object.
From the outside of the object by using the judgment result of the judgment unit 23 and the judgment unit 23 that separately executes the intersection judgment between the rays of light generated by the first and second generation units 21 and 22 and the CAD data of the object. The CG data of the object when viewed and the CG data of the object viewed from the inside of the object are separately created, and the CG data of the object when viewed from outside the object created by the creating unit 24. The first storage unit 25 for storing and the CG of the object viewed from the inside of the object created by the creating unit 24
A second storage unit 26 that stores data, a calculation unit 27 that selectively uses CG data stored in the first and second storage units 25 and 26 to calculate a CG animation, and a calculation of the calculation unit 27 And a display unit 28 for displaying the CG animation on the display.

[0014]

The CG of the present invention whose principle configuration is shown in FIG.
In the data creation device 1, when the reading unit 10 reads the CAD data of the object to be processed, the generation unit 11 causes a plurality of virtual light rays (from the outside to the inside of the object) when the object is viewed only from the outside. For example, when a plurality of light rays that are parallel to the modeling coordinate system of the object are generated and the object is viewed only from the inside, a plurality of virtual light rays (for example, a plurality of spherical rays emitted from the inside to the outside of the object) are generated. When the object is viewed from both the outside and the inside, a plurality of virtual rays from the outside to the inside of the object and a plurality of virtual rays from the inside to the outside of the object are generated. appear.

In response to the generation of this light ray, the determination unit 12 executes the intersection determination between the generated light ray and the CAD data of the object, and in response to this determination result, the creation unit 13 causes the determination unit 12 to perform the determination.
The CG data of the object is automatically created by deleting the polygon determined not to intersect the ray from the CAD data of the object.

In this way, when it is necessary to create CG data when the object is viewed only from the outside, a plurality of virtual light rays from the outside to the inside of the object are generated for the CAD data of the object. As a result, by identifying a polygon inside the object that does not enter the visual field and deleting it, the CG data can be automatically created from the CAD data.

C when the object is viewed only from the inside
When it is necessary to create G data, CAD of the object
By generating multiple virtual light rays from the inside of the object to the outside of the data, by identifying the polygon outside the object that does not enter the field of view and deleting it,
The CG data can be automatically created from the CAD data.

When it is necessary to create CG data for viewing an object from both the outside and the inside, a plurality of virtual light rays from the outside to the inside of the object are added to the CAD data of the object. By generating multiple virtual light rays from the inside to the outside of the object, by identifying the polygon of the object that does not enter the field of view and deleting it,
The CG data can be automatically created from the CAD data.

On the other hand, in the CG animation editing apparatus 2 of the present invention whose principle configuration is shown in FIG.
When the CAD data of the object to be processed is read by the first generation unit 21, the first generation unit 21 generates a plurality of virtual light rays that are directed from the outside to the inside of the object, and the second generation unit 22 is generated from the inside to the outside of the object. Generates multiple virtual rays of light heading for.

In response to the light ray generation, the determination unit 23 determines the intersection between the light ray generated by the first generation unit 21 and the CAD data of the object, and the CAD ray of the light beam generated by the second generation unit 22 and the object CAD. The intersection judgment with the data is executed separately. In response to this determination result, the creation unit 24 deletes the polygon determined not to intersect the light beam generated by the first generation unit 21 from the CAD data of the object, so that the CG data when the object is viewed from the outside. To automatically create the first storage unit 2
5 and deletes the polygon determined not to intersect with the light beam generated by the second generation unit 22 from the CAD data of the object, thereby C
The G data is automatically created and stored in the second storage unit 26.

When the CG data of the object forming the virtual world is stored in the first and second storage units 25 and 26, the calculation unit 27 uses the CG data to calculate the world seen from the current viewpoint. Then, the CG animation is created, but at this time, when the object to be created is viewed from the outside, the CG data stored in the first storage unit 25 is used to create the CG animation. When viewed from the inside, a CG animation is created using the CG data stored in the second storage unit 26.

In this way, from the CAD data of the object, CG data when the object is viewed from the outside and CG data when the object is viewed from the inside are created separately, and the CG data of the two types is selected. By adopting the configuration in which the one corresponding to the viewpoint position is selected and used, the CG data used for creating the CG animation has a small number of polygons, and the CG animation can be created at high speed.

[0023]

EXAMPLES The present invention will be described in detail below with reference to examples. FIG. 2 illustrates the system configuration of a CG animation editing system equipped with the present invention.

In the figure, 30 is a CG animation editing apparatus equipped with the present invention, 31 is a CAD data file storing CAD data of an object created by a CAD system (not shown), and 32 is an object used by the CG animation editing apparatus 30. Is a CG data file for storing the CG data of the CG animation, and 33 is a display for displaying the CG animation generated by the CG animation editing device 30.

The CG animation editing apparatus 30 equipped with the present invention creates a CG data of the object from the CAD data of the object stored in the CAD data file 31 and stores it in the CG data file 32. 34 and a CG animation generation mechanism 35 that generates a CG animation using the CG data of the object stored in the CG data file 32 and displays it on the display 33.

FIG. 3 shows a CG animation editing device 30.
An example of the processing flow executed by the CG data creation mechanism 34 of the above is illustrated. Then, according to this processing flow,
The CG data creation processing of the present invention will be described in detail.

When the CG data creating mechanism 34 creates CG data of an object according to the processing flow of FIG. 3, first of all, in step 1, has the processing for all objects stored in the CAD data file 31 ended? When it is determined whether or not the processing is completed for all the objects, the entire processing is ended, and when it is determined that the unprocessed objects are left, the process proceeds to step 2 and remains. One of the objects is selected as the object to be processed, and all the polygons it has are set as the judgment target polygons.

Then, in step 3, it is judged whether or not the number of light rays generated so far has reached a specified number, and when it is judged that the number of rays has not reached, the CAD data of the object is read from outside the object. A new virtual ray (ray) directed toward the inside is generated. As a generation form of this light ray, for example, as shown in FIG. 4, it is executed by sequentially generating light rays parallel to the ± XYZ axes of the modeling coordinate system of the object (coordinate system for each object). At this time, the number of light rays generated in each direction is set, for example, according to the size of the step area of the object in that direction. Here, since the bounding box information including the object is stored in the CAD data, the step area of the object can be known by using it.

In step 3, when a light ray traveling from the outside to the inside of the object is generated, subsequently, in step 4, it is judged whether or not the judgment object polygon is left, and when it is judged that it is not left. Returning to step 3, when it is determined that the remaining polygon is left, the process proceeds to step 5 to check whether or not the remaining determination target polygon intersects with the ray generated in step 3.

In step 5, when it is detected that there are no intersecting polygons, the process returns to step 3,
When detecting the existence of intersecting polygons,
In step 6, the intersecting polygon is removed from the determination target polygon, and then the process returns to step 3.

Then, when it is determined in step 3 that the number of light rays generated so far has reached the designated number (including the case where it is determined in step 4 that the determination target polygon does not remain), Go to step 7,
The CG data of the object is created by deleting from the CAD data of the object the determination target polygons that are left as those that do not intersect with the generated ray, and the CG data file 32
Then, the process returns to step 1 to create the CG data of the next object.

In this way, the CG data creation mechanism 34
Executes the processing flow of FIG. 3 to execute CAD of the object.
By generating multiple virtual rays from the outside of the object to the inside of the data, by identifying the polygon inside the object that does not enter the field of view and deleting it,
The CG data is automatically created from the CAD data.

For example, as shown in FIG. 5, there is an object in which two plates are attached. Since this object needs to be expressed as a combination of two plates in CAD data, it is composed of 12 quadrangular polygons. However, in CG data, it touches at the center part. The two quadrilateral polygons are unnecessary. In such a case, the CG data creation mechanism 34 creates the CG data by automatically deleting the two quadrangular polygons that are not in the field of view by executing the processing flow of FIG. I will go.

In the processing flow of FIG. 3, it is assumed that the object is seen only from the outside, but some objects are seen only from the inside, and some are seen from both the outside and the inside.

FIGS. 6 and 7 show an example of the processing flow of the CG data creation mechanism 34 executed in such a case. Next, according to this processing flow, the CG of the present invention
The data creation process will be described in detail.

The CG data creation mechanism 34 is shown in FIGS.
When creating CG data of an object according to the processing flow of step 1, first, in step 1, it is determined whether or not the object stored in the CAD data file 31 is an object that may be seen from the inside. When judging that it is an object that cannot be seen from the inside,
Proceeding to step 2, the fact that the object is referenced only from outside is registered.

On the other hand, when it is determined in step 1 that the object can be seen from inside, step 3
Go to and set the position inside the object from which to look. In this setting process, for example, a wireframe CG animation (colorless CG animation) is created from CAD data of an object, and the user enters the object according to the CG animation to perform setting. The position is not limited to one, and multiple positions may be set.

Subsequently, in step 4, when it is determined whether the object processed in step 3 is likely to be seen from the outside and it is determined that the object is not seen from the outside, step 5 is performed. When it is determined that the object is referred to only from the inside and the object is likely to be seen from the outside, the process proceeds to step 6 and the object referred to from both the outside and the inside. Register that it is.

In this way, the CAD data file 3
If the object stored in 1 is an object that is referenced only from outside, an object that is referenced only from inside, or an object that is referenced from both outside and inside, Then, in step 7, it is determined whether or not the processing for all the objects stored in the CAD data file 31 has been completed, and when it is determined that the processing for all the objects has been completed, all the processing is completed and processed. When it is determined that there is no remaining object, the process proceeds to step 8, one of the remaining objects is selected as the processing target object, and all the polygons it has are set as the determination target polygons. .

Then, in step 9, it is judged whether or not the object selected in step 8 is an externally referenced object, and when it is judged that it is an externally referenced object, the procedure goes to step 10. When it is determined that the number of rays of light that have traveled toward the inside of the object has reached the specified number and it is determined that they have not reached,
For the AD data, a new virtual ray from the outside to the inside of the object is generated. For example, as shown in FIG. 4, rays that are parallel to the ± XYZ axes of the modeling coordinate system of the object are generated.

At step 10, when a light ray traveling from the outside to the inside of the object is generated, then at step 11, it is judged whether or not the judgment object polygon is left, and when it is judged that it is not left. , Return to step 10, and when it is judged that there is remaining, step 1
In step 2, it is checked whether the remaining determination target polygon and the light ray generated in step 10 intersect.

When it is detected in step 12 that there is no intersecting polygon, the process returns to step 10, and when it is detected that there is an intersecting polygon, the process proceeds to step 13 to determine the intersecting polygon. After removing from the polygon, the process returns to step 10.

Then, in step 10, it is determined that the number of light rays that have been generated so far toward the inside of the object has reached a specified number (including the case where it is determined in step 11 that no determination target polygon remains). )
Proceed to step 14 of the processing flow of FIG.
It is determined whether or not the object selected in step 1 is an object that is also referred to from inside.

When it is determined in step 14 that the object is not referenced from inside, step 19
Then, by deleting from the CAD data of the object the determination target polygons that are left uninterrupted with the generated rays, CG data of the object is created and stored in the CG data file 32, and then Return to step 7 to create CG data for the object. That is, when passing through this route, the object selected in step 8 is an object that is referenced only from the outside, so CG data when the object is viewed from the outside is created and stored in the CG data file 32. I will do it.

On the other hand, when it is judged in step 14 that the object is also referred to from inside, step 15
When it is determined whether or not the number of rays of light that have been generated toward the outside of the object has reached the specified number and it is determined that the number of rays has not reached, the CAD data of the object is set in step 3. A new virtual ray is generated from the inside of the object to the outside with the internal point as the generation point. As the generation mode of this light ray, it is generated so as to be as uniform as possible in all directions of the space from the generation point set in step 3, and for example, as shown in FIG. appear.

When a light ray traveling from the inside to the outside of the object is generated in step 15, subsequently, in step 16, it is judged whether or not the judgment object polygon is left, and when it is judged that it is not left. , Return to step 15, and when it is judged that there is any remaining, step 1
In step 7, it is checked whether or not the remaining determination target polygon intersects with the light ray generated in step 15.

When it is detected in step 17 that there is no intersecting polygon, the process returns to step 15, and when it is detected that there is an intersecting polygon, the process proceeds to step 18 to determine the intersecting polygon. After removing from the polygon, the process returns to step 15.

Then, in step 15, it is judged that the number of light rays generated so far toward the outside of the object has reached a specified number (including the case where it is judged in step 16 that there is no judgment target polygon left). )
Proceeding to step 19, the CG of the object selected in step 8 is deleted by deleting, from the CAD data of the object, the determination target polygon that is left uninterrupted with the generated ray.
After creating the data and storing it in the CG data file 32, the process returns to step 7 of the processing flow of FIG. 6 to create the CG data of the next object. That is, when passing through this route, the object selected in step 8 is an object that is referenced from both the outside and the inside, so create CG data when the object is viewed from both the outside and the inside. The data is stored in the CG data file 32.

On the other hand, in step 9 of the processing flow of FIG.
When it is determined that the object selected in step 8 is not an externally referenced object, the process directly proceeds to step 14 without executing the processes of steps 10 to 13, and the processes of steps 15 to 19 are executed. Thus, the CG data of the object as viewed from the inside is created and stored in the CG data file 32, and then the CG data of the next object is created. Go. That is, when passing through this route, since the object selected in step 8 is an object that is referred to only from inside, CG data when the object is viewed from inside is created and stored in the CG data file 32. I will do it.

In this way, the CG data creation mechanism 34
By executing the processing flows of FIGS. 6 and 7, for an object viewed only from the outside, a plurality of virtual light rays from the outside to the inside of the object are generated with respect to the CAD data of the object. , CG data is automatically created by identifying a polygon that is inside the object that does not enter the field of view and deleting it. For an object viewed only from the inside, the CAD data of the object is compared with the inside of the object. CG data is automatically created by identifying a polygon outside the object that does not enter the field of view by generating multiple virtual rays that go to the outside, and deleting it. For an object to be viewed, by executing these two processes, it is possible to identify and delete a polygon that does not enter the field of view when viewed from the outside and that does not enter the field of view when viewed from the inside. In is to automatically create the CG data.

FIG. 9 shows a block configuration of the CG data creation mechanism 34 in the case of following the processing flows of FIGS. 6 and 7. As shown in this figure, when the processing flows of FIGS. 6 and 7 are followed, the CG data creation mechanism 34 includes an object perspective setting unit 40, a generated ray determination unit 41, an inward ray generation / intersection determination unit 42, An outward ray generation / intersection determination unit 43 and an unnecessary polygon erasing unit 44 are included.

Briefly explaining these functions,
The object view setting unit 40 considers the CG walkthrough scenario, and the objects stored in the CAD data file 31 are viewed by the user only from outside, viewed from both outside and inside, and viewed only from inside. Classification setting is performed for objects. Then, for an object viewed from the inside, a process of setting a place to look inside is also performed.

The generated ray determination unit 41 distributes the processing of the inward ray generation / crossing determination unit 42 for the object viewed only from the outside, and the processing of the outward ray generation / crossing determination unit 43 for the object viewed only from the inside. For objects viewed from both outside and inside, inward ray generation /
A process of allocating the processes of the intersection determination unit 42 and the outward ray generation / intersection determination unit 43 is performed.

The inward ray generation / intersection determination unit 42 generates an appropriate number of parallel rays of light in the front, rear, up, down, left, and right directions from the outside to the inside of the object to determine the intersection with all polygons. Further, the outward ray generation / intersection determination unit 43 generates an appropriate number of light rays directed in the spherical direction from the inside of the object to the outside, and determines the intersection with all polygons.

The unnecessary polygon erasing section 44 includes an inward ray generation / intersection determination section 42 and an outward ray generation / intersection determination section 43.
The CG data is created by deleting the polygons determined not to intersect in the CAD data.

In this way, the CG data creation mechanism 34
When the CG data of the object is created from the CAD data of the object and stored in the CG data file 32 by
The CG animation generation mechanism 35 of the G animation editing device 30 performs a process of generating a CG animation using the CG data and displaying it on the display 33.

In this CG animation generation processing, the processing for an object viewed from both outside and inside becomes a problem. In such a case, conventionally, the CG of the object is
It uses a structure that uses the data as it is. However, this reduces the CG drawing speed due to the presence of unnecessary polygons.

Therefore, in the present invention, the inward ray generation / intersection determination unit 4 is applied to objects viewed from both the outside and the inside.
2 and the CG data of the object when viewed from the outside obtained by the processing of the unnecessary polygon erasing unit 44 and the object when viewed from the inside obtained by the processing of the outward ray generation / intersection determination unit 43 and the unnecessary polygon erasing unit 44. CG data is prepared separately, and the CG data to be used is dynamically exchanged when the viewpoint moves from the outside to the inside of the object and when the viewpoint moves from the inside to the outside of the object. It takes a structure that creates a CG animation by going.

FIG. 10 shows a block configuration of the CG animation editing apparatus 30 according to this configuration. In the figure, the same components as those described in FIG. 9 are denoted by the same symbols.

The external vision data setting section 45 shown in this figure is
The CG data of the object when viewed from the outside, which is obtained by the processing of the inward ray generation / intersection determination unit 42 and the unnecessary polygon erasing unit 44, is set as the CG data used when the viewpoint is outside the object. In addition, the endoscopic data setting unit 46
Is the C of the object when viewed from the inside, which is obtained by the processing of the outward ray generation / intersection determination unit 43 and the unnecessary polygon elimination unit 44.
C to use G data when the viewpoint is inside the object
Set as G data.

The viewpoint judging unit 47, at the time of wall-through,
By determining whether or not an object viewed from both the outside and the inside intersects with the viewpoint, it is determined which of the outside and the inside is wall-through.For example, the outside is wall-through. However, when the viewpoint intersects with the object, it is determined that the object has entered the inside of the object.

When the viewpoint judging unit 47 judges that the viewpoint has moved from the inside to the outside of the object, the shape data replacing unit 48 stores the CG data used for creating the CG animation in the external data setting unit 45. C to set
When the viewpoint determination unit 47 determines that the viewpoint has moved from the outside to the inside of the object,
The CG data used for creating the CG animation is replaced with the CG data set by the endoscopic data setting unit 46.

With this configuration, it is possible to generate a CG animation using CG data having a smaller number of polygons than the conventional one.

[0064]

As described above, according to the present invention,
From the CAD data of the object, it becomes possible to automatically delete the polygons unnecessary for the CG animation generation processing of the CAD data, so ideal CG data or
CG data close to that can be automatically created. This makes it possible to automatically create realistic CG data of an object and to draw the object at high speed.

Moreover, according to the present invention, the drawing of the object viewed from both the outside and the inside can be executed at a higher speed than in the conventional case.

[Brief description of drawings]

FIG. 1 is a principle configuration diagram of the present invention.

FIG. 2 is a system configuration diagram of a CG animation editing system including the present invention.

FIG. 3 is an example of a processing flow of a CG data creation mechanism.

FIG. 4 is an explanatory diagram of directions of generated light rays.

FIG. 5 is an explanatory diagram of unnecessary polygon deletion processing.

FIG. 6 is another embodiment of the processing flow of the CG data creation mechanism.

FIG. 7 is another embodiment of the processing flow of the CG data creation mechanism.

FIG. 8 is an explanatory diagram of directions of generated light rays.

FIG. 9 is a block configuration diagram of a CG data creation mechanism.

FIG. 10 is a block configuration diagram of a CG animation editing device.

FIG. 11 is an explanatory diagram of CAD data.

FIG. 12 is an explanatory diagram of CG data.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CG data creation device 2 CG animation editing device 10 read part 11 generation part 12 determination part 13 creation part 20 read part 21 first generation part 22 second generation part 23 determination part 24 creation part 25 first storage part 26 Second storage unit 27 Calculation unit 28 Display unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kaori Suzuki 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa within Fujitsu Limited (72) Inventor Hiroshi Kamada 1015 Kamikodanaka, Nakahara-ku, Kawasaki, Kanagawa within Fujitsu Limited ( 72) Inventor Katsuhiko Hirota 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Fujitsu Limited

Claims (8)

[Claims] 1. A CG data creation apparatus for creating CG data of an object from CAD data of the object, comprising: a generation unit that generates a plurality of virtual light rays toward the CAD data of the object; The CG data of the object can be obtained by deleting from the CAD data of the object a determination unit that performs intersection determination between the generated light beam and the CAD data of the object, and the object component portion that is determined not to intersect with the light beam by the determination unit. A CG data creating device characterized by comprising a creating unit for creating. 2. The CG data creating apparatus according to claim 1, wherein the generating unit processes to generate a plurality of light rays from the outside to the inside of the object. 3. The CG data creation apparatus according to claim 1, wherein the generation unit processes to generate a plurality of light rays traveling from the inside to the outside of the object. 4. The CG data creating apparatus according to claim 1, wherein the generating unit includes a plurality of light rays traveling from the outside to the inside of the object,
A CG data creation device, characterized in that processing is performed so as to generate a plurality of light rays from the inside of an object to the outside. 5. The CG data creation device according to claim 2, wherein the generation unit processes as a plurality of light rays directed from the outside to the inside of the object, light rays that are parallel to six directions of front, rear, up, down, left and right. A CG data creation device characterized by: 6. The CG data creation apparatus according to claim 5, wherein the generation unit performs processing so as to use a direction parallel to the modeling coordinate system of the object as the front, rear, up, down, left and right directions. apparatus. 7. The CG data creating apparatus according to claim 3, wherein the generating unit processes to generate spherical light rays as a plurality of light rays traveling from the inside to the outside of the object. CG data creating device. 8. A CG animation editing apparatus for creating CG data of an object from CAD data of the object and creating a CG animation using the CG data, wherein the CAD data of the object is directed from the outside to the inside of the object. A first generation unit for generating a plurality of virtual light rays directed to the object; a second generation unit for generating a plurality of virtual light rays directed from the inside of the object to the outside toward the CAD data of the object; No. 1 determination unit for separately performing the intersection determination between the ray generated by the generation unit and the CAD data of the object and the determination determination of the intersection between the ray generated by the second generation unit and the CAD data of the object; The CG data of the object when viewed from outside the object and the C of the object when viewed from inside the object are deleted by erasing the object constituent part determined not to intersect the ray by the section from the CAD data of the object. A creation unit for creating a data separately among the CG data of two kinds of objects to create the creation unit,
A CG animation editing apparatus, comprising: a calculation unit that calculates and uses a CG animation by selecting and using one corresponding to a viewpoint position.