JP2003337954A - Image processing method, program, recording medium, and image processor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that when a specular image is displayed on a 1st translucent or transparent body, a 2nd body behind the 1st body is hidden behind the specular image. <P>SOLUTION: When a character 80 is in a translucent or transparent sphere 82, the position where a 1st specular image 90 is displayed is determined by the relation between a virtual light source 86 and a viewpoint 84. When it overlaps with the character 80 displayed in the sphere 82, a CPU 61 sets a dummy light source 92 for irradiation with light from a direction different from the virtual light source 86 and sets the lightness of the 1st specular image 90 to be displayed weak. Through the setting of the dummy light source 92, a 2nd specular image 94 is displayed on the internal surface of the sphere 82 positioned behind the character 80. Consequently, the 2nd specular image 94 is displayed as a background behind the character 80 when viewed from the viewpoint 84 and the 1st specular image 90 with weak lightness is displayed on the front side of the sphere 82. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes it possible for an object to move while another object is inside a semitransparent or transparent object, and to allow light from a set light source to be reflected on the outer surface of the object. Specular displayed (Reflected light pattern)
The present invention relates to an image processing method, a program, a recording medium, and an image processing apparatus for displaying the image at a position corresponding to the angle from the light source.

[0002]

2. Description of the Related Art In a video game device for image processing, the game software recorded on a storage medium such as a CD-ROM is read and the game software read by the player operating the operation buttons of the controller. On the basis of the execution of the wear, for example, an image formed by a three-dimensional computer graphic (3DCG) is sequentially generated to show the movement of the character in the game, and this is displayed on the display device.

In this type of game software, when displaying a semi-transparent or transparent object, a reflected light pattern (called "specular") is seen on the surface of the semi-transparent or transparent object in which light from a light source appears to be reflected. It is displayed to express the reality of the surface of the object.

When an image of an object is produced by computer graphics, a process of calculating the position of the object defined in a virtual space in a computer (referred to as "geometry process") and an image are generated based on the calculation result. Perform processing (hereinafter referred to as "rendering processing"). An image displayed on the screen of the display is generated by the geometry processing and the rendering processing.

An operator who creates computer graphics (called "CG creator") operates a CG creation tool such as a personal computer to design (modeling) an object (character) to be displayed on the screen.
Then, the movement of the object and the color and texture of the surface of the object are set.

When the object, the virtual light source, and the viewpoint thus created are arranged in a virtual three-dimensional space, when the light from the virtual light source hits the object due to the positional relationship between the object, the viewpoint, and the virtual light source. The display position of the reflected light pattern (specular) of the light reflected on the surface of the object is determined. (Note that the viewpoint is set so as to two-dimensionally display a scene when an object is viewed in a virtual three-dimensional space on an image display device such as a television that displays an image.) When at least one of the object, the viewpoint, and the light source moves in the dimensional space, the positional relationship between them changes, so that the specular position seen from the viewpoint moves on the surface of the object.

For example, when a semi-transparent or transparent sphere 2, a virtual light source 3 and a viewpoint 4 as shown in FIG. 1 are set, the direction from the center of the sphere 2 to the virtual light source 3 and
By displaying the specular 5 on the surface of the sphere 2 with the center position between the direction from the center of the sphere 2 to the viewpoint 4,
Specular 5 reflected on the surface of sphere 2 seen from viewpoint 4
Can be displayed correctly.

As a method for forming the specular 5 on the surface of the sphere 2, a polygon of the specular 5 is used to attach a texture of the specular 5 to the polygon of the sphere 2, and a polygon of the specular 5 is used to form the sphere 2. Shading processing by changing the vertex color of the polygon, the method of changing the texture of the polygon forming the sphere 2 to the texture of the specular 5, or the texture of the specular 5 overlapping the texture of the polygon forming the sphere 2. There are a sticking method, a method of performing shading processing by changing a point color of polygons forming the sphere 2.

[0009]

However, in the conventional image display method, when the relative position between the light source and the viewpoint with respect to the object changes, for example, when the character 2 is set inside the sphere 2 in FIG. The reflected light pattern may be displayed overlapping the position of the character inside the transparent or transparent object, and the facial expression and movement of the character in the game may not be visible, reducing the fun of the video game by half. There was a problem that it would end up.

Therefore, an object of the present invention is to provide an image processing method, a program, a recording medium and an image processing apparatus which solve the above problems.

[0011]

In order to solve the above problems, the present invention has the following features.

According to the first aspect of the present invention, a first object in which a viewpoint, a light source, and at least a semitransparent or transparent part exist in a virtual three-dimensional space, and a second object inside the first object Is set, and an image processing method for displaying a specular that looks like the light from the light source is reflected on the surface of the first object when viewed from the viewpoint. When it is determined that the specular display has been illuminated, the control is performed so that the specular display is performed inside the first object and behind the second object.
It is possible to prevent the second object from being unable to be displayed due to the overlapping of the second object, and the second object that has entered the inside of the first object can be displayed in a distinguishable manner.

According to a second aspect of the present invention, a first object having a viewpoint, a light source, and at least a semitransparent or transparent portion in a virtual three-dimensional space, and a second object inside the first object. Is set, and an image processing method for displaying a specular that appears to reflect light from the light source on the surface of the first object when viewed from the viewpoint, When it is determined that the light from is shining, the specular display is controlled so that the specular display is displayed on the extension line connecting the viewpoint and the surface struck by the light, and behind the second object. It is possible to prevent the second object from being unable to be displayed due to the overlapping of the second object, and the second object that has entered the inside of the first object can be displayed in a distinguishable manner.

According to a third aspect of the present invention, in the image processing method according to the first or second aspect, a first specular to be displayed at a position where the light of the first object is lit is generated, and a first specular image is generated. The specular and the second specular displayed behind the second object are displayed with a predetermined ratio of brightness or color density, and the reality of the first object can be increased. , The second object that has entered the inside of the first object can be displayed in a distinguishable manner.

The invention according to claim 4 is the image processing method according to claim 1 or 2, wherein the first step of obtaining the first vector from the predetermined position of the first object toward the light source, and the first step Second step of obtaining a second vector from the predetermined position of the object to the viewpoint, a third step of internally dividing the first vector and the second vector, and a third step of A fourth process of obtaining a first intersection point where the vector and the surface of the first object intersect, and a first straight line connecting the viewpoint and the first intersection point is located behind the second object. A fifth step of obtaining a second intersection point where the surface of the object intersects, a sixth step of obtaining a second straight line intersecting with the second intersection point from a predetermined position of the first object, and a first straight line And the second straight line intersect with the seventh process to find the crossing angle and the second straight line as the center. Based on an eighth step of obtaining a third straight line extending in a direction symmetrical with the first straight line at an angle, a ninth step of setting a pseudo light source on the third straight line, and a pseudo light source, The tenth process of displaying the specular display centering on the second intersection is included, and the reality of the first object can be enhanced, and the second process that entered the first object can be performed. Objects can be displayed in a distinguishable manner.

According to a fifth aspect of the present invention, there is provided a program for causing a computer to function the image processing method according to at least any one of the first to fourth aspects, and the first object is obtained by arithmetic processing of the computer. It is possible to enhance the reality of (1) and to display the second object inside the first object in a distinguishable manner.

According to a sixth aspect of the present invention, there is provided a computer-readable recording medium in which the program according to the fifth aspect is recorded.
It is possible to increase the reality of the object and to display the second object inside the first object in a distinguishable manner.

According to a seventh aspect of the present invention, in the virtual three-dimensional space, the viewpoint, the light source, and the first object in which at least a semitransparent or transparent portion exists, and the second object inside the first object. An image processing apparatus for displaying specular that appears to reflect light from a light source on the surface of a first object when viewed from the viewpoint by setting and, A judging means for judging whether or not the light hits, and when the judging means judges that the light from the light source hits the first object, on the extension line connecting the viewpoint and the surface hit by the light; Has a control means for performing a specular display to the rear of the first object, which enhances the reality of the first object and prevents the second object from entering the first object. It can be displayed so that it can be identified.

[0019]

2 is a front view showing an embodiment of a video game device according to the present invention.

As shown in FIG. 2, a video game device 10 as an image processing device includes a game machine body 16 connected to an image display device 12 such as a display via a cable 14, and a controller operated by a player ( Peripheral) 18. The controller 18 is connected to the game machine main body 16 via a cable 19, and the game machine main body 16 receives control data and images from a disk-shaped storage medium (a storage medium storing a game software control program and the like) mounted therein. In addition to reading the data, a game image is generated and displayed on the screen of the image display device 12 in response to an operation signal from the controller 18. A portable game machine 20 is detachably attached to the controller 18, and a small liquid crystal display 22 provided on the portable game machine 20 is visible to the player.

The image display device 12 and the game machine body 1
6 is turned on, the screen 12 of the image display device 12 is displayed.
A start screen as shown in FIG. 2 is displayed on a, and nothing is displayed on the liquid crystal display 22 of the portable game machine 20.

FIG. 3 is a plan view of the controller 18.

As shown in FIG. 3, the controller 18
In the center of the back surface, a mounting portion 24 for mounting the portable game machine 20 is provided, and in the center of the upper surface, a rectangular opening 26 facing the liquid crystal display 22 of the portable game machine 20 is provided. When the portable game machine 20 is mounted on the mounting portion 24, the liquid crystal display 22 coincides with the opening 26, and the player can see the display content of the liquid crystal display 22.

On the upper surface of the controller 18, an analog joystick 28 operated by the left hand, a cross key 30 for instructing digital (8 directions), and a plurality of operation buttons 32 operated by the right hand are arranged. It is set up. Further, the controller 18 has a vibration generator 33 (shown by a broken line in FIG. 3) housed therein.

The mounting portion 24 is opened on the back side of the controller 18, and the portable game machine 20 is arbitrarily attached / detached according to the intention of the player.

FIG. 4 is a block diagram showing the internal structure of the game machine body 16 and peripheral devices. As shown in FIG. 4, the game machine main body 16 includes a CPU 61, a system memory 62, a program data ROM 63, a boot (BOOT).
T) ROM 64, bus arbiter 65, rendering processor 66, graphic memory 67, sound processor 68, sound memory 69.

As will be described later, the CPU 61 is a central processing unit that executes calculations such as execution of game programs, control of the entire system, and coordinate calculation for image display.

The system memory 62 is a storage medium in which the programs and various data necessary for the CPU 61 to execute the processing are stored after being read from the program data ROM 63 described later.

The program data ROM device 63 has a game program and various data (including video / music data).
Is a device for reading data from a storage medium (for example, a CD-ROM) in which is stored.

The boot ROM 64 is a storage medium in which programs and data necessary for starting the game machine body 16 are stored.

A CPU 61, a program data ROM 63, a boot ROM 64, a sound processor 68, and a rendering processor 66 are connected to the bus arbiter 65, and the bus occupation time is allocated to devices connected to each other via a bus to store data. Sending and receiving can be controlled.

The rendering processor 66 reproduces the video (moving image) data read from the program data ROM, is controlled according to the operation of the player and the progress of the game, and displays the image of the object whose coordinates are calculated by the CPU 61. Is an apparatus for generating an image for. Then, the image display device 12 as the main display displays an image based on the video signal supplied from the rendering processor 66.

The graphic memory 67 stores the graphic data such as textures and display frames necessary for the rendering processor 66 to generate an image.

The sound processor 68 is a program
The music data read from the data ROM is reproduced, and sound effects and sounds are generated according to the operation of the player and the progress of the game. The speaker 70 outputs a sound according to the sound signal supplied from the sound processor 68.

The sound memory 66 is a storage medium for storing sound data and the like necessary for generating sound effects and voice.

Further, the CPU 61 can perform data communication with an external computer via the bus arbiter 65 and the modem 71, and can also perform data communication with the controller 18 and the portable game machine 20 via the bus arbiter 65.

Here, the control processing in the present invention executed by the CPU 61 will be described. The CPU 61 reads a program recorded on a recording medium (CD-ROM or the like) mounted on the program data ROM device 63 and executes the program to display an image of the video game on the image display device 12. We are in control.

FIG. 5 is a view showing a display example by the image processing method of the present invention. As shown in FIG. 5, a character (second object) 80 is inside a semi-transparent or transparent sphere (first object) 82 in the virtual three-dimensional space, and A viewpoint 84 and a light source 86 are set.

When the light from the virtual light source 86 is set so as to illuminate the first straight line 88 connecting the viewpoint 84 and the center of the sphere 82 from diagonally above at an angle α, the sphere 82
The first specular (reflected light pattern) 90 is set at a position centered on α / 2 on the surface of.

As described above, the position where the first specular 90 is displayed is determined by the positional relationship between the virtual light source 86 and the viewpoint 84, but may overlap the character 80 displayed inside the sphere 82. In that case, the CPU 61
The control program is executed to set the pseudo light source 92 that emits light from a direction different from the virtual light source 86, and the brightness of the first specular 90 to be displayed is set weak.

The character 80 is set by setting the pseudo light source 92.
A second specular (reflected light pattern) 94 is displayed on the inner surface of the sphere 82 located behind the. This allows
When viewed from the viewpoint 84, the second specular 94 is displayed behind the character 80, and the first specular 90 with weak brightness is displayed on the front side of the sphere 82.

In this embodiment, for example, the brightness La of the first specular 90 and the brightness L of the second specular 94 are set.
The ratio with b is set to La: Lb = 25: 75.
The first specular 90 and the second specular 94
Is displayed in white, and by adjusting the density of white, it is displayed with arbitrary brightness.

The first specular 90 and the second specular 94 may be expressed by changing the translucency in addition to the brightness and the density of the color.

Therefore, even when the first specular 90 is displayed at the position of the character 80, the facial expression of the character 80 can be seen from the viewpoint 84, and the character 8
Since the second specular 94 is displayed behind 0, the reflected light pattern reflected by the sphere 82 is also displayed and the sphere 82 is displayed.
It becomes possible to express the image of.

Now, a method for the CPU 61 to set the first specular 90 and the second specular 94 will be described in more detail with reference to FIGS. 6 and 7. Incidentally, FIG.
The control process shown in is repeatedly executed at preset predetermined times, for example, at display timings of the display device.

As shown in FIGS. 6 and 7, in step S11 (hereinafter “step” is omitted), the first vector A from the center O of the sphere (first object) 82 toward the virtual light source 86 is determined. Ask. Then, in S12, the second vector B from the center O of the sphere 82 toward the viewpoint 84
Ask for.

Next, in S13, a third vector C that internally divides the first vector A and the second vector B is obtained. Here, the angle formed by the vector A and the vector B is α, and the internally-divided vector C is obtained by halving α, but it is not necessarily 1/2. Further, the vector C may be oriented in a direction between the vector A and the vector B.

Further, in S14, the viewpoint 84 and the sphere 82
The position (coordinates) of the intersection point D at which the intersection point D with the outer circumference (front side) is the center of the first specular 90 is obtained.

Subsequently, in S15, the first specular 9
It is checked whether or not the position where 0 is displayed overlaps the character (second object) 80 displayed inside the sphere 82 with respect to the viewpoint 84 (specular determination means).

In S15, when the first specular 90 does not overlap with the character 80 as viewed from the viewpoint 84, the process proceeds to S16, in which the first point is arranged centering on the intersection D based on the brightness set in the virtual light source 86. Specular 90
Seek the brightness of.

In S15, if the first specular 90 overlaps with the character 80 as viewed from the viewpoint 84, the process proceeds to S17 and a straight line F connecting the viewpoint 84 and the intersection D is obtained.
Finds an intersection E that intersects the inside of a sphere 82 formed behind the character 80. In the next S18, an angle H between the straight line G connecting the center O of the sphere 82 and the intersection E and the straight line F is obtained.

After that, the process proceeds to S19, and a straight line I having an angle H is obtained from the intersection E on the side opposite to the straight line F with respect to the straight line G. Subsequently, in S20, the pseudo light source 92 is set on the straight line I passing through the inside of the sphere 82.

In this embodiment, the angle H between the straight line F and the straight line G and the angle H between the straight line G and the straight line I are the same, but it is not necessary to set them to be the same, and they can be set arbitrarily. You may.

In the next step S21, the brightness of the second specular 94 centered at the intersection E is calculated based on the brightness set in the pseudo light source 92. Then, proceed to S22,
Based on the brightness set in the virtual light source 86, the brightness of the first specular 90 centered on the intersection D is obtained.
As a result, the sphere 82 located behind the character 80
A second specular 94 is displayed on the inner surface of the.

Further, the process proceeds to S23, in which the first ratio is set at a predetermined ratio.
The brightness of the specular 90 and the brightness of the second specular 94 are calculated. This ratio is based on the first specular 90
It is desirable to set the second specular 94 to be brighter. As a result, when viewed from the viewpoint 84, the second specular 9 as a background is displayed behind the character 80.
4 is displayed, and the first specular 90 of weak brightness is displayed on the front side of the sphere 82.

FIG. 8 is a diagram showing a display example created by the control process of FIG. As shown in FIG. 8, the second specular 94 is displayed on the inner surface of the sphere 82 located behind the character 80 by the control process of FIG. On the other hand, on the outer surface of the sphere 82, a first specular 90 is displayed at a position where the character 80 overlaps on the front side.

The brightness of the first specular 90 is 2
It is set to 5% and the brightness of the second specular 94 is 7
It is set to 5%. Therefore, in the image shown in FIG. 8, the facial expression of the character 80 can be seen by overlapping the first specular 90 with weak brightness with the character 80 while the character 80 is inside the semi-transparent or transparent sphere 82. Is displayed. At the same time, since the second specular 94 is displayed behind the character 80, the brightness of the first specular 90 with low brightness can be enhanced without obscuring the character 80, and the game is more effective. Can be displayed as a high-quality image that is practical and has high reality.

In particular, when the semi-transparent or transparent sphere 82 and the character 80 inside the sphere run (move), the position of the object with respect to the screen (viewpoint) and the virtual light source 86 changes, so The display position with the first specular 90 changes.

Therefore, in the case of displaying the action during the actual video game, it is determined in S11 whether or not the display position of the first specular 90 overlaps with the character 80, and depending on the running direction of the character 80. When the first specular 90 does not overlap the face of the character 80, only the first specular 90 is displayed.

Then, when the first specular 90 overlaps the face of the character 80 depending on the running direction of the character 80 as described above, the brightness of the first specular 90 is weakened and the character is also behind the character 80. By displaying the second specular 94, it is possible to display the specular of the character 80 while clearly displaying the specular. Therefore, even when a scene in which the running direction of the character 80 changes frequently is displayed, the first specular 90 and the second specular 94 are sequentially displayed according to the screen (viewpoint) and the orientation of the character 80 with respect to the virtual light source 86. It changes automatically.

In the above embodiment, the case where the character 80 is contained inside the semi-transparent or transparent sphere 82 as shown in FIG. 8 is given as an example, but the present invention is not limited to this, and shapes other than the sphere ( For example, it is possible to display a character 80 inside a (cylindrical) object.

The character 80 displayed inside the semi-transparent or transparent sphere 82 may be any character as long as it appears in each video game.

Further, in the above embodiment, the case where the present invention is applied to a home game machine has been described as an example, but the present invention is not limited to this.
For example, it is needless to say that it can be applied to an arcade game machine installed in a game facility called a game center or an amusement park.

Further, the second specular 94 has a viewpoint 84.
As long as it is displayed behind the character 80 as viewed from above, the display position is not limited to be specified by the method shown in the present embodiment, and another method may be used.

For example, it may be anywhere on the straight line F behind the character 80, not on the position of the intersection E, and it is not necessary to display it along the inner surface of the sphere 82. You may make it display a specular.

Furthermore, the display method of the specular itself is
For example, a method of pasting the texture of the specular 5 onto the polygon of the sphere 2 using the polygon of the specular 5
Using the polygon of Specular 5 to change the vertex color of the polygon of sphere 2 to perform shading processing, the method of changing the texture of the polygons forming sphere 2 to the texture of Specular 5, or the texture of specular 5 to a sphere There are a method of overlaying and pasting on the texture of the polygon forming the 2 and a method of performing shading processing by changing the point color of the polygon forming the sphere 2.

In this embodiment, the display of the specular is controlled for a semi-transparent or transparent object and an object in which the character is arranged. Not limited to the form of two objects,
For example, it goes without saying that the objects and problems of the present invention can be achieved even if an opaque or semitransparent object is integrally formed inside an object having a semitransparent or transparent portion.

[0068]

As described above, according to the first aspect of the invention, the viewpoint, the light source, and the first object and the first object in which at least a semitransparent or transparent portion exists in the virtual three-dimensional space. A second object is set inside, and an image processing method for displaying a specular that looks like light from a light source is reflected on the surface of the first object when viewed from a viewpoint, When it is determined that the light from the light source hits the first object, the specular display is controlled so as to display the specular display inside the first object and behind the second object. It is possible to prevent that the second object cannot be displayed due to overlapping with the second object, and it is possible to distinguishably display the second object that has entered the inside of the first object.

According to the second aspect of the present invention, the viewpoint, the light source, and the first object in which at least a semi-transparent or transparent portion exists in the virtual three-dimensional space and the second object inside the first object. And an image processing method for displaying a specular that appears to reflect light from the light source on the surface of the first object when viewed from the viewpoint. When it is determined that the light from the light source hits,
Since the specular display is controlled so as to display the specular display on the extension line connecting the viewpoint and the surface struck by the light, and behind the second object, the specular display overlaps the second object and the second object cannot be displayed. This can be prevented, and the second object that has entered the inside of the first object can be displayed in an identifiable manner.

According to a third aspect of the present invention, in the image processing method according to the first or second aspect, the first specular to be displayed at the position where the light of the first object is radiated is further generated. Since the first specular and the second specular displayed behind the second object are displayed with a predetermined ratio of brightness or color density, the reality of the first object can be increased and , The second object that has entered the inside of the first object can be displayed in a distinguishable manner.

According to a fourth aspect of the invention, in the image processing method according to the first or second aspect, the first vector for obtaining the first vector from the predetermined position of the first object toward the light source is obtained.
And the second moving from the predetermined position of the first object to the viewpoint.
And a third step of internally dividing the first vector and the second vector.
And a fourth process for obtaining a first intersection point at which the third vector and the surface of the first object intersect, and a first straight line connecting the viewpoint and the first intersection point is the second object. A fifth step of obtaining a second intersection point at which the surface of the first object located at the rear intersects with the surface of a first object, and a sixth step of obtaining a second straight line intersecting with the second intersection point from a predetermined position of the first object. Process, first straight line and second
A seventh step of obtaining an intersection angle with which the straight line intersects, and an eighth step of obtaining a third straight line extending in a direction symmetrical to the first straight line at the intersection angle about the second straight line , The ninth step of setting the pseudo light source on the third straight line, and the tenth step of performing specular display centering on the second intersection based on the pseudo light source. It is possible to increase the reality of the object and to display the second object inside the first object in a distinguishable manner.

According to a fifth aspect of the present invention, there is provided a program for causing a computer to function in the image processing method according to at least any one of the first to fourth aspects. It is possible to increase the reality of the object and to display the second object inside the first object in a distinguishable manner.

Further, since the invention according to claim 6 is a computer-readable recording medium in which the program according to claim 5 is recorded, the reality of the first object is realized by the arithmetic processing of the computer. A second object that is elevated and that has entered the interior of the first object can be displayed in a distinguishable manner.

According to the seventh aspect of the present invention, the viewpoint, the light source, and the first object in which at least a semitransparent or transparent portion exists in the virtual three-dimensional space and the second object inside the first object. Is an image processing apparatus that displays a specular that appears to reflect light from the light source on the surface of the first object when the object is set to On the extension line connecting the viewpoint and the surface struck by the light when the light from the light source shines on the first object by the deciding means for deciding whether or not the light from Since the control means for controlling the specular display is provided behind the second object, the reality of the first object can be increased and the second object inside the first object can be improved. It can be displayed so that it can be identified.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a conventional image processing method.

FIG. 2 is a front view showing an embodiment of the video game device according to the present invention.

3 is a plan view of the controller 18. FIG.

FIG. 4 is a block diagram showing an internal configuration of a game machine body 16 and peripheral devices.

FIG. 5 is a diagram showing a display example according to the image processing method of the present invention.

FIG. 6 is a principle diagram for explaining a principle of image processing executed by a CPU of a video game device.

FIG. 7 is a flowchart for explaining image processing executed by the CPU of the video game device.

8 is a diagram showing a display example created by the control process of FIG.

[Explanation of symbols]

10 Video game devices 12 Image display device 16 Game console body 18 Controller 61 CPU 62 system memory 63 Program data ROM 65 Bus Arbiter 66 Rendering Processor 80 characters 82 sphere 84 viewpoints 86 virtual light source 88 First straight line 90 First Specular 92 Pseudo light source 94 Second Specular

Claims (7)

[Claims] 1. A first object having a viewpoint, a light source, and at least a semi-transparent or transparent part and a second object inside the first object are set in a virtual three-dimensional space, and the viewpoint is set. An image processing method for displaying a specular that appears to reflect light from the light source on the surface of the first object when viewed from above. An image processing method, characterized in that, when it is determined that the light hits, a specular display is performed inside the first object and behind the second object. 2. A first object having a viewpoint, a light source, and at least a semi-transparent or transparent portion and a second object inside the first object are set in a virtual three-dimensional space, and the viewpoint is set. An image processing method for displaying a specular that appears to reflect light from the light source on the surface of the first object when viewed from above. When it is determined that the light hits, the image processing method is characterized by performing a specular display on an extension line connecting the viewpoint and the surface hit by the light and behind the second object. 3. The image processing method according to claim 1 or 2, further comprising generating a first specular to be displayed at a position where the light of the first object is radiated, and generating the first specular and the second specular. An image processing method characterized by displaying a second specular displayed behind an object with a predetermined ratio of brightness or color density. 4. The image processing method according to claim 1, wherein a first step of obtaining a first vector from the predetermined position of the first object toward the light source, and a predetermined position of the first object. A second step of obtaining a second vector from the above to the viewpoint, a third step of obtaining a third vector that internally divides the first vector and the second vector, and the third vector And a fourth line for determining a first intersection point at which the surface of the first object intersects, and a first straight line connecting the viewpoint and the first intersection point is located behind the second object. A fifth step of obtaining a second intersection point where the surface of the first object intersects, and a sixth step of obtaining a second straight line intersecting with the second intersection point from a predetermined position of the first object. And an intersection angle at which the first straight line and the second straight line intersect with each other. A seventh step of obtaining a third straight line extending in a direction symmetrical to the first straight line at the intersection angle about the second straight line, and a third straight line An image processing method comprising: a ninth step of setting a pseudo light source above; and a tenth step of performing specular display around the second intersection based on the pseudo light source. 5. A program for causing a computer to function as the image processing method according to claim 1. 6. A computer-readable recording medium in which the program according to claim 5 is recorded. 7. A viewpoint, a light source, and a first object having at least a semitransparent or transparent portion in a virtual three-dimensional space, and a second object inside the first object are set, and the viewpoint is set. An image processing apparatus that displays specular light that appears to reflect light from the light source on the surface of the first object when viewed from above, wherein light from the light source is applied to the first object. When determining that the light from the light source hits the first object by the judging means that judges whether or not the light hits, on the extension line connecting the viewpoint and the surface hit by the light, and An image processing apparatus comprising control means for controlling so as to perform specular display behind the second object.