JP2001276415A - Game device and information memory medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively express the speed feeling of objects moving on a screen and reduce the process for generating images. SOLUTION: An object controller 112 calculates the shift distances of the objects and determines the number and layout positions of the transparent objects. A polygon set part 116 sets a polygon model of the polygon number (polygon reduction ratio) according to the shift distances of the objects and generates the polygon model of the transparent objects reduced with the polygon number. A transparency set part 114 calculates the transparency of the transparent objects based on the number of the transparent objects. A light source set part 118 sets light sources for setting the luminance of the transparent objects. An image formation part 130 generates the images of the objects seen from the prescribed view point according to the number, layout positions, polygon model, transparency, and light sources of the transparent objects and displays them on a display part 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a game apparatus for generating an image at a given viewpoint in an object space and executing a given game by displaying the generated image, and an information storage medium.

[0002]

2. Description of the Related Art Conventionally, in a video game device or the like, when an object moves on a display screen in accordance with the operation of a player or the progress of a game, an afterimage of the object is displayed to display the image of the object. It was able to express movement smoothly and express it with a sense of speed.

For example, a plurality of afterimages having the same shape as the object are displayed behind the object, and the feeling of speed of the moving object is effectively expressed by decreasing the luminance of the afterimage or increasing the transparency as the distance from the object increases. Was. The afterimage of an object realized by such a method is unlikely to occur in the real world, but is useful in a game space for enjoying a game in that it enhances a sense of reality and provides a more powerful image. .

[0004]

However, in the above-mentioned conventional moving object display method, the transparency and brightness of the afterimage must be set for each afterimage according to the distance from the position of the object to the display position of the afterimage. Because it does not become
Much processing was required to display the afterimage. On the other hand, in a game device, it is necessary to generate an image according to the progress of a game at a high speed. Therefore, if a lot of time is required to display an afterimage, the processing speed related to the image generation of the entire game screen is increased. Is slow, and the game is no longer feasible.

[0005] It is an object of the present invention to solve the above-mentioned problem by effectively expressing the sense of speed of an object and reducing processing related to image generation.

[0006]

According to an aspect of the present invention, an image at a given viewpoint in an object space is generated, and the generated image is displayed. A transparency setting means (for example, a transparency setting unit 114 shown in FIG. 6) for setting the transparency of an object, and reflecting the transparency set by the transparency setting means on the object. Generating means for generating a transparent object (for example, the object control unit 11 shown in FIG. 6)
2) and an expression unit (for example, the image generation unit 130 shown in FIG. 6) for expressing the object in the generated image by overlapping a plurality of transparent objects having the same transparency generated by the generation unit. It is characterized by having.

In this case, as in the second aspect of the present invention, the expression means may shift a position at which the plurality of transparent objects are overlapped according to the mobility of the object.

[0010] According to an eleventh aspect of the present invention, an information storage medium stores information for executing a given game by generating an image at a given viewpoint in an object space and displaying the generated image. And transparency information of the object, and generation information for generating a transparent object reflecting the transparency information on the object,
And expression information for expressing the object in the generated image by superimposing a plurality of transparent objects having the same transparency generated by the generation information.

In this case, as in the twelfth aspect of the present invention, the expression information may include information for shifting a position at which the plurality of transparent objects are overlapped according to the mobility of the object. .

Here, the mobility is a parameter indicating the degree of the movement of the object, including, for example, the movement distance of the object proceeding during one frame, the movement speed and the acceleration in each frame, and the like.

According to the first, second, eleventh, or twelfth aspect of the present invention, an object is represented by superimposing a plurality of transparent objects having the same degree of transparency. Therefore, in the related art, the object is distinguished from an afterimage and the object moves. In such a case, the afterimage was displayed behind the entity, but the object can be expressed without distinguishing between the entity and the afterimage, and when the object moves, simply shifting the position of the transparent object will give a sense of speed. Can be easily expressed.
Further, since the transparency of a plurality of transparent objects is the same, it is not necessary to calculate the transparency for each transparent object, and the processing for calculating the transparency can be reduced.

According to a third aspect of the present invention, in the game apparatus according to the first or second aspect, an object number setting means for setting the number of the transparent objects according to the mobility of the object. For example, FIG.
And the expression unit may express the object in the generated image by overlapping the number of the transparent objects set by the object number setting unit.

[0013] Also, as in the invention of claim 13, in the information storage medium of the invention of claim 11 or 12,
The object information further includes object number setting information for setting the number of the transparent objects according to the mobility of the object, and the expression information is obtained by overlapping the number of the transparent objects set by the object number setting information. Information for expressing the object in the generated image may be included.

According to the third or thirteenth aspect of the present invention, the number of transparent objects is changed according to the mobility of the objects. For example, by increasing the number of transparent objects, the objects become more blurred. Because it is possible to express a feeling that is visible, it is possible to express a sense of speed more effectively.

According to a fourth aspect of the present invention, in the game apparatus according to the third aspect, the transparency setting means is configured to control the number of transparent objects according to the number of transparent objects set by the object number setting means. Transparency may be set.

According to a fourteenth aspect of the present invention, in the information storage medium of the thirteenth aspect, the transparency information is set according to the number of transparent objects set by the object number setting information. Information may be included.

According to the present invention, the transparency of the transparent object is set in accordance with the number of the transparent objects. For example, the transparency is increased as the number of the transparent objects increases. It can express a feeling that the object looks more blurry, and can easily express a feeling of faster speed.

According to a fifth aspect of the present invention, in the game apparatus according to any one of the first to fourth aspects of the present invention, the generating means includes a polygon of a transparent object generated based on the mobility of the object. The number may be changed.

According to a fifteenth aspect of the present invention, in the information storage medium according to any one of the eleventh to fourteenth aspects, the number of polygons of the transparent object is changed based on the mobility of the object. May be included.

According to the fifth or fifteenth aspect of the present invention, the number of polygons can be changed based on the mobility of the object, so that the number of polygons can be clearly determined, for example, as an object far from the viewpoint or an object having a high speed. For objects that do not need to be visible and do not require a precise polygon model, by reducing the number of polygons, the amount of data applied to the polygon model can be effectively reduced without impairing the realism of the object. .
Further, if the number of polygons is reduced, the time required for image generation can be shortened, so that the processing can be sped up.

Further, as in the invention according to claim 6, in the game device according to any one of claims 2 to 5, the mobility of the object may be a movement distance of the object.

The invention according to claim 16 is the invention according to claim 12.
In the information storage medium according to any one of Items 1 to 15, the mobility of the object may be a moving distance of the object.

According to the present invention, the number, position, number of polygons, etc. of the transparent object can be changed according to the moving distance of the object. The feeling of speed can be easily expressed.

Further, as in the invention according to claim 7, in the game apparatus according to any one of claims 2 to 5, the mobility of the object may be a moving speed of the object.

Further, as in the invention according to claim 17, in the information storage medium according to any one of claims 2 to 5, the mobility of the object may be a moving speed of the object. .

According to the present invention, the number, position, number of polygons, etc. of the transparent object can be changed according to the moving speed of the object. Speed feeling can be easily expressed.

In the game apparatus according to any one of the first to seventh aspects, the brightness of each of the plurality of transparent objects is set based on a light source in the object space. (For example, the light source specifying unit 118 shown in FIG. 6)
May be further provided.

In the information storage medium according to any one of the eleventh to seventeenth aspects, the brightness of the plurality of transparent objects is determined based on a light source in the object space. Brightness information for each setting may be further included.

According to the eighth or eighteenth aspect of the present invention, the brightness of the transparent object is set based on the light source in the object space. Change can be expressed more realistically.

According to a ninth aspect of the present invention, in the game apparatus according to the eighth aspect, when there are a plurality of the light sources, the brightness setting means sets the light source specified based on the brightness to the light source. The brightness of the transparent object may be set.

According to the nineteenth aspect of the present invention, in the information storage medium of the eighteenth aspect, when there are a plurality of light sources, the light sources to be set for the brightness of the transparent object based on the brightness information are set to the light sources. It may include information for specifying based on the brightness of the image.

According to the ninth or nineteenth aspect of the present invention, the lighting effect based on a specific light source can be emphasized. Further, since the brightness only needs to be set based on the specified light source, it is possible to reduce processing such as shading related to the light source.

In the game apparatus according to any one of the first to ninth aspects, as in the tenth aspect, the expression means reflects the transparency in addition to the plurality of transparent objects. The plurality of transparent objects may be represented as afterimages by representing the no object in the generated image.

In the information storage medium according to any one of the eleventh to nineteenth aspects, the expression information reflects the transparency in addition to the plurality of transparent objects. By representing the unexposed object in the generated image, information for expressing the plurality of transparent objects as afterimages may be included.

According to the tenth or twentieth aspect of the present invention, an object that does not reflect transparency can be represented as an entity of an object, and a transparent object can be represented as an afterimage.
It is possible to express contours, colors, and the like more clearly, and express the sense of speed of the object with a more realistic feeling.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing an example in which the present invention is applied to a home-use game device. In FIG. 1, a display 1200 displays a game image including an object in the object space. (Here, the object refers to an object that moves in the object space.)
While watching the game image projected on the game 200, the user operates the game controllers 1202 and 1204 to move the objects and enjoy various games. in this case,
Information required for playing a game, such as a game program, is stored in a CD-R, which is an information storage medium detachable from the main unit.
OM 1206, IC card 1208, memory card 12
12 and the like.

FIGS. 2 to 5 are views showing examples of objects displayed on the display 1200. FIG. FIG.
FIG. 11 is a diagram illustrating a case where an image in which a white spherical object is stationary is displayed on a screen with a black background. The image of the object shown in FIG. 2 is actually generated by overlapping a plurality of transparent objects having the same transparency at the same position. Here, the transparent object is an object in which only the transparency is changed, and is expressed as the color of the actual object when a plurality of the transparent objects are overlapped, that is, when the transparency is the transparency of the actual object.

FIG. 3 is a diagram showing a state in which the object of FIG. 2 is moving toward the lower right on the screen. As shown in FIG. 3, when the object is moving, a number of transparent objects having the same transparency corresponding to the moving distance are displayed. In the portion where the transparent objects overlap, the color of the background and the color of each overlapping transparent object are displayed in an overlapping manner. In FIG. 3, since the background is black, the portion where the number of transparent objects overlapping is smaller, the background color black appears more strongly, and the portion where the number of overlapping transparent objects is larger,
The color of the object itself is white. If the transparent object has a plurality of colors and different transparent portions of the transparent object overlap, the background color and the color of the overlapping portion of each transparent object overlap and are displayed as a mixed color. Is done.

FIG. 4 is a diagram showing a case where the moving distance of the object on the screen is longer than that shown in FIG. As shown in FIG. 4, as the moving distance increases, the number of transparent objects increases, and the transparency of the transparent objects also increases. Therefore, each transparent object appears more blurry than the transparent object shown in FIG. In other words, it is possible to express a state in which the object looks blurred, as in the case where an object moving at high speed is actually seen.

FIG. 5 is a view showing a case where the object is moving the same moving distance as that shown in FIG. 4, but a case where the distance between the transparent objects is gradually widened and displayed. As shown in FIG. 5, by displaying each transparent object at different intervals, it is possible to express a state in which the speed of the object is changing, and to express the moving object more realistically.

As described above, by expressing an object moving on the screen by a plurality of transparent objects, it is possible to express a state in which the object appears to be blurred, as in the case where a moving object is actually photographed. The feeling of speed in the movement of the user can be effectively and easily expressed.

FIG. 6 is a diagram showing an example of functional blocks according to the present embodiment. The functional blocks according to the present embodiment include an operation unit 10, a processing unit 100, a display unit 40, and an information storage medium 500.

The operation section 10 is for inputting an instruction to operate an object in the game. The user operates the game controllers 1202 and 1204 shown in FIG.
The operation data is input by using, for example,. The operation data obtained by the operation unit 10 is output to the processing unit 100.

The processing section 100 mainly includes the game operation section 11
0, and an image generation unit 130. The game calculation unit 110 reads out the game program 52 from the information storage medium 500 and proceeds with the game according to the game program, the viewpoint position of a given viewpoint, the line-of-sight direction. ,
A process of setting a field of view or the like, a process of setting an object including a light source in an object space based on the object data 54, a process of moving an object in the object space according to operation data input from the operation unit 10 or the game program 52, and the like. Execute the process.

When setting the position of the object in the object space, the game calculation unit 110 sets the position of the object in the frame immediately before the frame in which the image is generated as the starting point position, and sets the position of the object in the current frame. Set the position as the end point position.

The game calculation section 110 includes an object control section 112, a transparency setting section 114, a polygon setting section 116, and a light source specifying section 118. The object control unit 112 calculates the moving distance of the object in one frame based on the set starting point position and ending point position of the object, and determines the number of transparent objects from the transparent object data 56 according to the calculated moving distance. Is performed.

FIG. 7 is a diagram showing an example of the data structure of the transparent object data 56. In FIG. 7, transparent object data 56 is data in which the number of transparent objects and the polygon model identification number are stored in association with the moving distance. The object data 54 stores a plurality of polygon models having different numbers of polygons (polygon reduction rates) corresponding to the respective objects.
The polygon model identification number is the object data 54
Is a number for specifying a polygon model having a different number of polygons stored in the. The polygon model identification number is determined by a polygon setting unit 116 described later. In the transparent object data 56, an identification number corresponding to a polygon model having a smaller number of polygons (a higher polygon reduction rate) is set as the moving distance becomes longer.

For example, when the calculated moving distance d is “0”, the object control unit 112 determines the number of transparent objects as m1, and the polygon setting unit 116 determines the polygon model whose polygon model identification number is r1. Set. The transparent object data 56 is set so that the number of transparent objects increases as the moving distance d increases. This is because, as the moving distance of the object becomes longer, the object is rendered more blurry so as to have a sense of speed.

The object control unit 112 sets the arrangement position of the transparent object in the object space based on the start point position and the end point position of the object, the determined moving distance of the object, and the number of transparent objects.

The transparency setting unit 114 performs a process of setting the transparency of the transparent object based on the number of transparent objects determined by the object control unit 112. That is, the transparency of all the transparent objects is set to the same transparency, and the setting is made so that the transparency of the actual object is obtained when all the transparent objects are overlapped. For example, when the transparency of an actual object is “0.1” and the number of transparent objects is “10”, the transparency is set to “0.1” in a state where the transparent objects of “10” overlap each other. .

The polygon setting unit 116 has a so-called LOD
The object control unit 11
The polygon model identification number of the transparent object is determined from the transparent object data 56 based on the moving distance of the object calculated in Step 2. By setting a polygon model corresponding to the determined polygon model identification number among a plurality of polygon models having different numbers of polygons (polygon reduction rate) stored in the object data 54, the polygon of the polygon model relating to the transparent object is set. Perform processing to reduce the number. In the transparent object data 56, the polygon model identification number corresponding to the polygon model having a smaller number of polygons is set as the moving distance becomes longer.
Is to set a polygon model with a smaller number of polygons (higher polygon reduction rate) as the moving distance of the object becomes longer.

This is because when the moving distance is long, the number of transparent objects expressed as objects increases, and the transparency is set high. Therefore, even if the number of polygons is reduced, the change in the shape of the object is not noticeable. This is because the real feeling of the image is not hindered. Further, a polygon model with a small number of polygons has a small amount of data and a short processing time for image generation. Therefore, when the moving distance is long, the number of transparent objects increases, but the number of polygons can be reduced, so that the data amount can be efficiently reduced and the processing time required for image generation is shortened. Can be

The polygon setting unit 116 sets a polygon model of the number of polygons according to not only the moving distance of the object but also the distance from the viewpoint position to the object as in the general LOD processing. Is also good. That is, since an object located far from the viewpoint need not be a precise polygon model, a polygon model having a smaller number of polygons may be set as the distance from the viewpoint increases.

The light source specifying section 118 performs a process of specifying the brightest light source at the set position of the transparent object from the light source data 58 as a luminance setting target light source. Specifically, a light source used when performing shading processing on each transparent object is specified. Therefore, the lighting effect based on the specified light source can be emphasized. In addition, since the shading process is performed based only on the specified light source, it is possible to reduce processing related to the light source such as light source tracking.

Note that a plurality of light sources may be specified as the luminance setting target light sources, or all the light sources set in the object space may be specified as the luminance setting target light sources. Conversely, the darkest light source at the position where the transparent object is arranged may be specified.

The image generation unit 130 performs a process of generating an image such as a game screen described with reference to FIGS. 2 to 6, and is viewed from a given viewpoint in the object space set by the game calculation unit 110. A process for generating an image is performed. In this case, the data relating to the transparent object, that is, the number, the transparency, the position, the polygon model, and the like have already been set by the game calculation unit 110 as described above.

The function of the processing unit 100 described above is
Type, RISC type CPU, DSP, image capture IC,
It can be realized by hardware such as a memory.

The display section 40 displays an image or the like generated by the image generation section 130, and includes, for example, a CRT,
The display is realized by an LCD, a plasma display, or the like, and corresponds to the display 1200 in FIG.

The information storage medium 500 stores object data 5 including light source data 58 in addition to the game program 52.
4 and transparent object data 56 are stored.
The function of the information storage medium 500 can be realized by hardware such as a CD-ROM, a game cassette, an IC card, an MO, an FD, a DVD, a memory, and a hard disk.

The object data 54 stores polygon model data of an object set in the object space, and data such as transparency, color, position, and operation. A plurality of polygon model data having different numbers of polygons are stored for each object. Then, the game calculation unit 110 sets each object stored in the object data 54 in the object space.

The light source data 58 is the object data 5
4 is object data relating to the light source among the objects stored in the object 4, and the arrangement position, type (spot light, point light source, surface light source, environmental light,...), Brightness, attenuation of various light sources set in the object space Data such as values, irradiation directions, spread angles, and colors are stored. Then, as described above, the light source data 58 is specified by the light source specifying unit 118 as a light source for luminance setting.

Next, the operation of the image generation processing in the game device of the present embodiment will be described with reference to the flowchart shown in FIG. The operation illustrated in FIG. 8 illustrates an operation related to the image generation processing of one frame.

First, the object control unit 112 obtains the position (starting point position) and direction of the object in the previous frame in which the image generation unit 130 has generated the image (step S1). Then, the moving distance of the object is calculated based on the obtained position of the object (starting point position) and the position of the object at the present time (current frame) (ending point position), and according to the moving distance of the object with reference to the transparent object data 56. Determine the number of transparent objects created. Next, the object control unit 112 sets an arrangement position of the transparent object based on the determined number of transparent objects (Step S2). Next, the polygon setting unit 116 sets a polygon model of the number of polygons according to the moving distance calculated by the object control unit 112 (Step S3).

Next, the transparency setting section 114 calculates the transparency of the transparent object based on the number of transparent objects set by the object control section 112 (step S4). Next, the light source specifying unit 118 specifies a light source to be used for setting the luminance of each transparent object (used for shading processing) (Step S).
5). Then, the image generation unit 130 performs steps S2 to S5
According to the number, position, polygon model, transparency, and light source of the transparent object set in the step (1), an image of the object viewed from a given viewpoint is generated and displayed on the display unit 40 (step S6), and the process is terminated.

Next, an example of a hardware configuration capable of realizing the present embodiment will be described with reference to FIG. In the device shown in FIG.
AM1004, information storage medium 1006, sound generation IC10
08, image generation IC 1010, I / O port 1012,
1014 are connected to each other via a system bus 1016 so that data can be input and output. And the image generation IC 10
10 is connected to a display 1018, and a sound generation IC
A speaker 1020 is connected to 1008, a control device 1022 is connected to the I / O port 1012,
A communication device 1024 is connected to the I / O port 1014.

The information storage medium 1006 mainly stores programs, image data for expressing a display object, sound data, play data, and the like, and corresponds to the information storage medium 500 in FIG. For example, when the computer that realizes the present embodiment is a computer, a CD-ROM, D
When the VD or the like is a home-use game device, a game cassette or the like is used in addition to the above. In the case of realizing as an arcade game device, a memory such as a ROM or a hard disk is used.
06 becomes the ROM 1002.

The control device 1022 corresponds to a game controller, an operation panel, and the like, and is a device for inputting a result of a determination made by a user in accordance with the progress of a game to the main body of the device.

The program stored in the information storage medium 1006, the system program (initialization information of the apparatus main body) stored in the ROM 1002, the control apparatus 102
The CPU 1000 controls the entire apparatus and performs various data processing in accordance with a signal or the like input from the device 2. RAM1004
Is storage means used as a work area or the like of the CPU 1000. The information storage medium 1006 and the ROM 1002
Is given, or the calculation result of the CPU 1000 is stored.

Further, this apparatus is provided with a sound generation IC 1008 and an image generation IC 1010 so that game sounds and game images can be suitably output. The sound generation IC 1008 includes the information storage medium 1006 and the ROM 100
2 is an integrated circuit that generates game sounds such as sound effects and BGM music based on the information stored in the storage device 2, and the generated game sounds are output by the speaker 1020. The image generation IC 1010 includes a RAM 1004, a ROM 100
2. An integrated circuit that generates pixel information to be output to the display 1018 based on image information sent from the information storage medium 1006 or the like. Also display 1018
Is intended to include display devices such as CRTs, LCDs, TVs, plasma displays, and projectors.

The communication device 1024 exchanges various kinds of information used inside the device with the outside. The communication device 1024 is connected to another device to send and receive given information corresponding to a game program or the like, and to perform communication. It is used for transmitting and receiving information such as a game program via a line.

The various processing described with reference to FIGS. 1 to 7 includes an information storage medium 1006 storing a program for performing the processing shown in the flowchart of FIG. 8, a CPU 1000 operating according to the program, Generation I
C1010, a sound generation IC 1008, and the like. The processing performed by the image generation IC 1010 and the like is C
The processing may be performed by software using the PU 1000 or a general-purpose DSP.

FIG. 10 shows an example in which the present embodiment is applied to a game device including a host device 1300 and terminals 1304-1 to 1304-n connected to the host device 1300 via a communication line 1302. Is shown.

In this case, the game program 52, the object data 54, the transparent object data 56, and the light source data 58 are stored in an information storage medium 1306 such as a magnetic disk device, a magnetic tape device, or a memory that can be controlled by the host device 1300. Is stored. Terminal 1304
-1 to 1304-n each have a CPU, an image generation IC, and a sound generation IC and can generate a game image and a game sound in a stand-alone manner, the host device 1300 sends the game program 52, the object data 5
4. Transparent object data 56 and light source data 58
And the like via the communication line 1302.
04-n. On the other hand, if it cannot be generated stand-alone, the host device 1300 generates a game image and a game sound and transmits them to the terminals 1304-1 to 1304-.
n and output at the terminal.

As described above, according to the present invention, a plurality of transparent objects having the same transparency are used to represent the object, and when the object moves, the number, position, and transparency are determined according to the moving distance of the object. And the like, it is possible to effectively and easily express a sense of speed according to the moving distance of the object. Further, since the plurality of transparent objects have the same transparency, the processing can be reduced.

The present invention is not limited to those described in the above embodiments, and various modifications can be made.
For example, as shown in FIG. 11, in addition to a transparent object, an image including the substance of the object may be generated. When an object is expressed only by a transparent object, for example, as shown in FIGS.
The area near the middle point between the start point and the end point will be displayed most clearly because the transparent object has the largest overlap, but since the entity of the object exists at the end point, the entity of the object is located at that position By adding, the shape and location of the object can be made clearer.

FIG. 11 is a diagram showing an example of a screen on which an image including the substance of the object is displayed in addition to a plurality of transparent objects, in which a character running from the right to the left of the screen is displayed. Indicates that it has been done. For example, as shown in FIG. 11A, by superimposing and displaying the entity of the object in front of the transparent object, the contour, color, surface characteristics, and the like of the object can be displayed more clearly. Conversely, when the entity of the object is displayed on the back of the transparent object as shown in FIG. 11B, a more blurred feeling can be expressed, and the moving state of the object can be expressed more effectively. can do.

Further, for example, the shape of each transparent object does not have to be the same, and may be a shape adapted to the movement of the object at the set arrangement position. For example, when the character is running as shown in FIG. 11, the movement of the hand, the movement of the foot, and the like at the position where each transparent object is arranged are reflected because the character moves by waving the hand or moving the foot. By making the shape, it is possible to express the running state more realistically.

In the above embodiment, the number of transparent objects, the polygon model (the number of polygons) and the like are set according to the moving distance of the object.
However, the present invention is not limited to this. For example, the number of transparent objects, a polygon model, and the like may be set according to the moving speed of the object. In this case, the transparent object data 56 stores the number of transparent objects associated with the moving speed of the object and the polygon model identification number. Further, the object control unit 112 may set the position of the transparent object according to the moving speed of the object. When the object is accelerating at a given acceleration, as shown in FIG. By setting the position of the transparent object so that the interval between the transparent objects increases as the moving speed increases, a change in the speed can be expressed.

Further, in the above embodiment,
The polygon model is generated by setting the number, arrangement position, and the like of the transparent objects according to the moving distance. For example, the pattern (number, transparency, polygon model) of the transparent object associated with the moving distance or the moving speed is set. …
Etc.) All may be stored in advance. For example, when expressing an object that only moves in a certain type, the pattern of the transparent object corresponding to the type of movement is stored as needed, so that the number of transparent objects, transparency, polygon model, etc. Can be omitted, and the processing can be speeded up.

In the above embodiment, only the object moving in the object space has been described as an object. For example, even if the object is stationary in the object space, the viewpoint is moving. Since the object moves on the display screen, the object may be represented by a plurality of transparent objects having the same transparency as the moving object. For example, when displaying an image viewed from the viewpoint of a driver of the own vehicle while traveling, the scenery arranged around the own vehicle (viewpoint) in accordance with the moving distance and the moving speed of the own vehicle (viewpoint) is represented by a transparent object. By displaying it, the sense of speed felt by the driver can be further emphasized.

[0082]

According to the present invention, since an object is represented by superimposing a plurality of transparent objects having the same transparency, the object can be represented without distinguishing between an entity and an afterimage. By simply shifting the position of the transparent object, a sense of speed can be easily expressed. Further, since the object is expressed by a plurality of transparent objects having the same transparency, it is not necessary to calculate the transparency of each transparent object, and the processing can be reduced.

The position and number of the transparent objects can be changed according to the mobility of the object, and the transparency can be changed according to the number of the transparent objects. Can be effectively and easily expressed.

Further, since the number of polygons of the transparent object can be changed according to the mobility, it is possible to reduce the number of polygons of the object which has a high mobility and does not require a precise polygon model. The number of polygons can be reduced without loss, the data amount can be reduced, and the time required for image generation can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example in which the present invention is applied to a home game device.

FIG. 2 is a diagram showing an example of an object displayed on a display 1200.

FIG. 3 is a view showing an example of an object displayed on a display 1200.

FIG. 4 is a diagram showing an example of an object displayed on a display 1200.

FIG. 5 is a view showing an example of an object displayed on a display 1200.

FIG. 6 is a diagram showing an example of a functional block diagram of the embodiment.

FIG. 7 is a diagram showing an example of a data configuration of transparent object data 56.

FIG. 8 is a flowchart illustrating an operation related to an image generation process.

FIG. 9 is a diagram illustrating an example of a hardware configuration capable of realizing the embodiment;

FIG. 10 is a diagram showing an example in which the present embodiment is applied to a game terminal connected to a host device via a communication line.

FIG. 11 is a diagram illustrating an example of an image including an entity of an object.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Operation part 40 Display part 60 Memory card 100 Processing part 110 Game calculation part 112 Object control part 114 Transparency setting part 116 Polygon setting part 118 Light source specification part 130 Image generation part 500 Information storage medium 52 Game program 54 Object data 56 Transparent object data 58 Light source data

Claims (20)

[Claims] 1. A game apparatus for executing a given game by generating an image at a given viewpoint in an object space and displaying the generated image, wherein a transparency for setting the transparency of the object is provided. Setting means; generating means for generating a transparent object reflecting the transparency set by the transparency setting means on the object; and superposing a plurality of transparent objects having the same transparency generated by the generating means. A game device, comprising: an expression unit for expressing the object in a generated image. 2. The method according to claim 1, wherein the expression means includes:
A game device, wherein a position at which the plurality of transparent objects are overlapped is shifted. 3. The apparatus according to claim 1, further comprising an object number setting unit configured to set the number of the transparent objects according to the mobility of the object, wherein the expression unit is set by the object number setting unit. A game device, wherein the object in the generated image is expressed by overlapping a predetermined number of the transparent objects. 4. The game device according to claim 3, wherein the transparency setting means sets the transparency of the object according to the number of transparent objects set by the object number setting means. 5. The game device according to claim 1, wherein the generation unit changes the number of polygons of a transparent object to be generated based on the mobility of the object. 6. The game device according to claim 2, wherein the mobility of the object is a moving distance of the object. 7. The game device according to claim 2, wherein the mobility of the object is a moving speed of the object. 8. The game apparatus according to claim 1, further comprising a luminance setting unit for setting luminance of each of the plurality of transparent objects based on a light source in the object space. . 9. The game according to claim 8, wherein, when there are a plurality of light sources, the luminance setting means sets a light source specified based on brightness as a target of the luminance setting of the transparent object. apparatus. 10. The method according to claim 1, wherein the expression means includes a plurality of transparent objects,
A game device, wherein the plurality of transparent objects are represented as afterimages by representing the object on which the transparency is not reflected in the generated image. 11. An information storage medium storing an information for executing a given game by generating an image at a given viewpoint in an object space and displaying the generated image. Transparency information, generation information for generating a transparent object in which the transparency information is reflected on the object, and a plurality of transparent objects having the same transparency generated by the generation information are superimposed to form the object in the generated image. An information storage medium comprising: expression information for expression; 12. The expression information according to claim 11, wherein the expression information is based on a mobility of the object.
An information storage medium comprising information for shifting a position at which the plurality of transparent objects are overlapped. 13. The object number setting information according to claim 11, further comprising object number setting information for setting the number of the transparent objects according to the mobility of the object. An information storage medium comprising information for expressing the object in the generated image by overlapping a predetermined number of the transparent objects. 14. The information storage medium according to claim 13, including information for setting said transparency information in accordance with the number of transparent objects set by said object number setting means. 15. An information storage medium according to claim 11, further comprising information for changing the number of polygons of said transparent object based on the mobility of said object. 16. The information storage medium according to claim 12, wherein the mobility of the object is a moving distance of the object. 17. The information storage medium according to claim 12, wherein the mobility of the object is a moving speed of the object. 18. An information storage according to claim 11, further comprising luminance information for setting respective luminances of said plurality of transparent objects based on a light source in said object space. Medium. 19. The information processing apparatus according to claim 18, wherein, when there are a plurality of light sources, information for specifying a target light source for setting the brightness of the transparent object based on the brightness information based on the brightness of each light source is included. Information storage medium. 20. The display device according to claim 11, wherein the expression information includes, in addition to the plurality of transparent objects,
An information storage medium comprising information for expressing the plurality of transparent objects as afterimages by representing the object in which the transparency is not reflected in the generated image.