JP4056021B2 - Image generating apparatus and information storage medium - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image generation apparatus and an information storage medium that generate an image at a given viewpoint in an object space.
[0002]
[Background Art and Problems to be Solved by the Invention]
2. Description of the Related Art Conventionally, image generation apparatuses that arrange a plurality of objects in an object space that is a virtual three-dimensional space and generate an image that can be viewed from a given viewpoint in the object space have been developed and put into practical use. It is popular as a way to experience reality. Taking an image generation apparatus that can enjoy a racing car game as an example, a player enjoys a three-dimensional game by running a moving body such as a car that the user operates in the object space.
[0003]
In such an image generation apparatus, it is desirable to provide a farthest view object for displaying the background in the object space. By providing such a farthest view object, an appropriate background can be displayed at any position in the object space. Further, even when a meaningless image is displayed due to image processing, at least the farthest view object is displayed, so that the unnaturalness of the display image can be reduced. Further, it is possible to provide a realistic background image as compared with the case where the background display is performed using a simple two-dimensional image.
[0004]
However, in the conventional image generation apparatus, the image of the farthest view object remains stationary. For this reason, for example, it was not possible to realize a rich expression of the sky or a realistic expression of changes in weather or time zones. For this reason, the achievement of the improvement of virtual reality was insufficient.
[0005]
The present invention has been made in view of the above problems, and an object of the present invention is to provide an image generation apparatus and an information storage medium capable of expressing a realistic background image.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides an image generation apparatus that generates an image at a given viewpoint in an object space in which a plurality of objects including a farthest view object for displaying a background are arranged. Means for mapping the image in the original image area to the farthest view object while moving the original image area corresponding to the image after mapping in real time in the space in which the image before mapping is defined; Means for generating an image including the image of the farthest view object.
[0007]
According to the present invention, the image in the original image area is mapped to the farthest object while moving the original image area in real time. This makes it possible to change an image mapped to the farthest view object (image after mapping) in real time with simple processing. As a result, for example, it is possible to express a realistic background image such as a cloud flowing, and it is possible to improve virtual reality.
[0008]
Further, the present invention is characterized in that the space in which an image before mapping is defined is a texture space, and the farthest view object is mapped by texture mapping. In this case, the texture space may be two-dimensional or three-dimensional. The mapping in the present invention is not limited to texture mapping, and various modifications such as mapping using so-called voxels are possible.
[0009]
According to the present invention, the movement of the original image area is at least one of translational movement and rotational movement. By moving the original image area in translation and rotation in this way, it is possible to change the image mapped to the farthest object in real time while saving the storage capacity required to store the image before mapping.
[0010]
According to the present invention, the farthest object has a first surface on which an image is mapped while the original image area is moving in real time, and a second surface on which the original image area is mapped without moving in real time. The color of the first surface is changed so as to approach the color of the boundary as it approaches the boundary between the first and second surfaces, and the color of the second surface is As the boundary is approached, the color of the boundary is changed so as to approach the boundary. In this way, the boundary can be made inconspicuous, and an image near the boundary can be prevented from becoming unnatural.
[0011]
The process of bringing the colors of the first and second surfaces closer to the boundary color can be performed by at least one of Gouraud shading and depth cueing. However, the process of bringing the colors of the first and second surfaces closer to the boundary color is not limited to these.
[0012]
According to the present invention, the farthest view object has at least one end surface to which an image is mapped while the original image area moves in real time, and at least one to which an image is mapped without moving the original image area in real time. And including two sides. By doing so, it is possible to express the sky or the like in which the sky pattern changes in real time.
[0013]
In the invention, it is preferable that the end face is formed by primitive faces arranged concentrically. In this way, in particular, the process of bringing the colors of the first and second surfaces closer to the boundary color can be easily realized by Gouraud shading.
[0014]
Further, the present invention provides a first area in which an image for expressing the first weather or the first time zone is defined in the space in which the image before mapping is defined, and the second weather or the second weather. And a second region in which an image for expressing the second time zone is defined, and the original image region is moved from the first region to the second region. By doing in this way, it becomes possible to express a weather change and a time change by simple processing.
[0015]
The present invention also expresses a change from the first weather or the first time zone to the second weather or the second time zone in the space in which an image before mapping is defined. A connection area in which a connection image is defined is provided, and the original image area is moved from the first area to the second area via the connection area. In this way, smooth and natural weather changes and time changes can be expressed.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the following, a case where the present invention is applied to a bicycle game will be described as an example. However, the present invention is not limited to this.
[0017]
FIG. 1 shows an example of an external view when the image generation apparatus of the present embodiment is applied to a business game apparatus.
[0018]
Here, the riding case 16 is made by imitating an actual bicycle, and a player (not shown) sits on the saddle 17 of the riding case 16. The display 18 displays a moving body 20 that is a virtual bicycle, a course on which the moving body 20 runs, and surrounding scenery. The player determines the advancing direction of the moving body 20 displayed on the display 18 by operating the handle 32 left and right while viewing this image. Moreover, the moving body 20 is advanced in the course traveling direction by pedaling the pedal 30 as indicated by A1.
[0019]
FIG. 2 shows an example of a functional block diagram of the image generation apparatus of the present embodiment.
[0020]
Here, the operation unit 10 is for the player to input operation data by operating the handle 32 of FIG. 1 or by stroking the pedal 30, and the operation data obtained by the operation unit 10 is processed by the processing unit 100. Is input.
[0021]
The processing unit 100 performs processing for arranging a display object in the object space and processing for generating an image at a given viewpoint in the object space based on the operation data and a given program. The function of the processing unit 100 can be realized by hardware such as a CPU (CISC type, RISC type), DSP, custom (gate array, etc.) IC or the like.
[0022]
The information storage medium 190 stores programs and data. The function of the information storage medium 190 can be realized by hardware such as a CD-ROM, game cassette, IC card, MO, FD, DVD, hard disk, and memory. The processing unit 100 performs various processes based on the program and data from the information storage medium 190.
[0023]
The processing unit 100 includes a game calculation unit 110 and an image generation unit 150.
[0024]
Here, the game calculation unit 110 performs a game mode setting process, a game progress process, a process for determining the position and direction of a moving body (bicycle or a character riding on a bicycle), a process for determining a viewpoint position and a line-of-sight direction, The process etc. which arrange | position is performed.
[0025]
The image generation unit 150 performs processing for generating an image at a given viewpoint in the object space set by the game calculation unit 110. The image generated by the image generation unit 150 is displayed on the display unit 12.
[0026]
The game calculation unit 110 includes a moving object calculation unit 112 and a mapping unit 114.
[0027]
Here, the moving object calculation unit 112 selects a moving object operated by the player or a moving object whose movement is controlled by a given control program (computer) based on operation data input from the operation unit 10 or a given program. Then, an operation for moving the object in the object space is performed. More specifically, a calculation for obtaining the position and direction of the moving body every frame (1/60 second) is performed.
[0028]
For example, assume that the position of the moving body in the (k-1) frame is PMk-1, the speed is VMk-1, the acceleration is AMk-1, and the time of one frame is Δt. Then, the position PMk and the speed VMk of the moving body in k frames are obtained, for example, by the following equations (1) and (2).
[0029]
PMk = PMk-1 + VMk-1 * .DELTA.t (1)
VMk = VMk-1 + AMk-1 * .DELTA.t (2)
The mapping unit 114 performs processing for mapping an image to an object such as a moving object, a course object, or a farthest view object. In the present embodiment, image mapping to an object is realized by texture mapping.
[0030]
3A and 3B show examples of the farthest view object 50 used in this embodiment. 3A is a plan view of the farthest view object 50 viewed from above, and FIG. 3B is a side view of the farthest view object 50 viewed from the side. The farthest view object 50 includes a primitive surface such as a plurality of polygons, and has an end surface 52 and side surfaces 54 (54-1, 54-2, 54-3, 54-4).
[0031]
The farthest view object 50 can be constituted by various primitive surfaces such as curved surfaces in addition to polygons.
[0032]
The end surface 52 is configured by a primitive surface such as a polygon arranged concentrically. Further, the side surfaces 54-2 and 54-4 are parallel to a center line 56 passing through the center of the end surface 52. On the other hand, the side surfaces 54-1 and 54-3 are inclined downward toward the center line 56. By specially shaping the side surface 54 in this way, it is possible to give a sense of perspective to the background expressed by the farthest view object 50.
[0033]
Note that it is desirable to map an image on which processing for expressing perspective, for example, contrast adjustment processing or defocus processing, is performed on the side surface 54-3. In this way, the expression of perspective by the farthest view object 50 can be further improved.
[0034]
Now, in the bicycle game to which the present embodiment is applied, as shown in FIG. 3 (B), the mobile body (bicycle or character) 20 is run on the course 40 arranged in the object space and the game is enjoyed. More specifically, the moving body 20 starts running from the start 42 and aims at the goal 44 while competing with other moving bodies. In this embodiment, the start 42 is at a high position and the goal 44 is at a low position, and the moving body 20 moves from a high position to a low position as the game progresses. The side surface 54 has a special shape as shown in FIG. Therefore, it is possible to give the player a feeling that the background displayed on the side surface 54 (54-1, 54-3) approaches the surface as the moving body 20 travels. Thereby, the virtual reality felt by the player can be greatly improved.
[0035]
FIG. 4A shows an example of an image generated by this embodiment. The player operates the operation unit 10 in FIG. 2 to cause the moving body 20 to travel on the course 40. Here, the background of the cloudy sky indicated by C1 in FIG. 4A is expressed by mapping a texture representing the cloudy sky on the end face 52 in FIG. The background of the blue sky shown in C2 is expressed by mapping a texture representing the blue sky on the side surface 54-1 of FIG. Similarly, the background of the mountain shown in C3 is a texture representing the mountain on the side surface 54-2, the background of the grassland shown in C4 is the texture representing the grassland on the side surface 54-3, and the background of the cliff shown in C5 is the side surface 54-4. It is expressed by mapping the texture that represents the cliff.
[0036]
FIG. 4B shows an example of an image generated after a given time has elapsed from the state of FIG. As can be understood by comparing C1 in FIG. 4A and D1 in FIG. 4B, according to the present embodiment, a state in which a cloud flows over time is expressed.
[0037]
In order to realize such an expression of a cloud flow or the like, the present embodiment has the following characteristics. That is, the first feature of the present embodiment is that the image in the original image area is moved to the maximum in the space in which the image before mapping is defined while moving the original image area corresponding to the image after mapping in real time. The point is that it is mapped to a distant view object. In this embodiment, since the texture mapping method is employed, the space in which the image before mapping is defined is a texture space.
[0038]
More specifically, the following processing is performed.
[0039]
For example, FIG. 5 shows an example of a texture space (U, V space) in which a texture to be mapped to the end face 52 in FIG. In FIG. 5, a texture 60 is a texture for expressing a cloudy sky. As shown in FIGS. 5, 6, and 7, in this embodiment, in the texture space in which the image before mapping (texture 60) is defined, the image after mapping (C1 in FIG. 4A, FIG. The original image area 62 corresponding to D1) of B) is translated in real time. Then, while the original image area 62 is translated in real time in this way, the image in the original image area 62 is mapped to the end face 52 of the farthest view object 50 in FIG.
[0040]
By doing in this way, the expression that clouds flow in real time as shown by C1 and D1 in FIGS. 4A and 4B can be realized by simple processing. As a result, compared with the expression that a still image is simply mapped on the end face 52, the virtual reality felt by the player can be greatly improved.
[0041]
In this embodiment, as shown by E1 in FIG. 7, the original image area 62 moves so as to return to the other end 64 when it reaches one end 66 of the texture 60. In this way, rich expressions can be realized while saving the storage capacity required for storing textures.
[0042]
5, 6, and 7, the original image area 62 is translated in the texture space, but the movement in the present embodiment is not limited to this. For example, as shown in FIG. 8, the original image area 62 may be rotated in the texture space. Even in this way, it is possible to realistically express the state of clouds flowing.
[0043]
In FIG. 9, on the end face 52 (first face) constituting the farthest view object, the cloudy sky texture is mapped while the original image area 62 moves in real time as shown in FIGS. Are mapped). On the other hand, on the side surface 54-1 (second surface) constituting the farthest view object, the blue sky texture is mapped (the still image is mapped) without moving the original image area 62 in real time.
[0044]
In such a case, if no processing is performed, an image that the cloud suddenly disappears at the boundary 70 between the end face 52 and the side face 54-1 is displayed, which gives the player a sense of incongruity.
[0045]
In order to solve the above problem, the present embodiment has the following second feature. That is, as shown in FIG. 9, the color of the end face 52 is changed so as to approach white as the color of the boundary 70 (gradation is applied) as it approaches the boundary 70. Similarly, the color of the side surface 54-1 is changed so as to approach white that is the color of the boundary 70 as the boundary 70 is approached. By doing so, as indicated by C6 in FIG. 4A and D2 in FIG. 4B, the existence of the boundary becomes inconspicuous, and it is possible to express how the clouds disappear naturally. This makes it possible to provide a player with a more natural and comfortable image.
[0046]
In FIG. 9, the color of the boundary 70 that is a color that approaches the end face 52 and the side face 54-1 is white, but the color of the boundary 70 is not limited to this. For example, the color of the boundary 70 can be red for a sunset sky, and black for a dark sky.
[0047]
In the present embodiment, the color of the end face 52 and the side face 54-1 is brought close to the color of the boundary 70 using Gouraud shading as shown in FIG. In Gouraud shading, the luminance of each dot (pixel) in the polygon is linearly interpolated based on the luminance data (0.5 and 1.0 in FIG. 10A) given to each vertex of the polygon. By this linear interpolation, it is possible to control the color of each dot on the end face 52 and the side face 54-1 (polygon) so that it approaches white as it approaches the boundary 70.
[0048]
However, the method of bringing the color of the end face 52 and the side face 54-1 closer to the color of the boundary 70 is not limited to Gouraud shading, and various techniques can be employed. For example, as shown in FIG. 10B, the color of the end surface 52 and the side surface 54-1 is changed to the color of the boundary 70 by using depth cueing that brings the original color closer to the target color based on the depth (depth) data. It may be close. In this case, the color of the boundary 70 becomes the target color for depth cueing.
[0049]
As the shape of the farthest view object 50, the shape shown in FIGS. 3A and 3B is particularly preferable from the viewpoint of improving perspective, but is not limited thereto. For example, as shown in FIG. 11A, the farthest view object 50 may be cylindrical. Further, as shown in FIG. 11B, the end face 52 may be formed in a hemispherical shape. 11A and 11B, an image in which the original image area moves in real time may be mapped on the end face 52, and an image in which the original image area does not move in real time may be mapped on the side face 54. desirable.
[0050]
Further, when the original image area 62 is rotated as shown in FIG. 8, the farthest view object 50 can be formed in a shape without the side surface 54 in FIG.
[0051]
As shown in FIG. 12, the end surface 52 is preferably formed by polygons (primitive surfaces) arranged concentrically. By doing so, the process of bringing the color of the end face 52 closer to the color of the boundary 70 can be easily realized using Gouraud shading.
[0052]
The third feature of the present embodiment is as follows. That is, as shown in FIG. 13, a first region 80 in which an image (texture) for expressing the first weather (or the first time zone) is defined in the texture space (U, V space) and And a second region in which an image for expressing the second weather (or the second time zone) is defined. Then, the original image area 62 is moved from the first area 80 to the second area 82, as indicated by F1 in FIG.
[0053]
By doing so, for example, a change in weather such as a change from a cloudy sky (first weather) to a rainy sky (second weather), or a noon sky (first time zone) to an evening sky (first time). It is possible to express a change in time zone such as a change in time zone 2). Thereby, the variety of image expression can be increased, and the richness of the image expression and the realism of the game can be further improved.
[0054]
As shown in FIG. 14, in the present embodiment, a change from the first weather (or the first time zone) to the second weather (or the second time zone) is expressed in the texture space. A connection area 84 where a connection image is defined is provided. 14, the original image area 62 is moved from the first area 80 to the second area 82 via the connection area 84.
[0055]
By doing in this way, it becomes possible to change a weather and a time zone smoothly and naturally. That is, it is possible to change the weather and time zone without giving the player a feeling of strangeness or unnaturalness.
[0056]
In FIG. 14, texture A ′ is a connection texture using the texture A for the first weather (time zone) as an original picture. The texture B ′ is a texture for connection using the texture B for the second weather (time zone) as an original picture.
[0057]
Next, a detailed processing example of this embodiment will be described with reference to the flowchart of FIG.
[0058]
First, a given offset value is added to the texture coordinates given to the vertices of each polygon (step S1). By adding the offset value in this manner, the image (texture) in the original image area 62 is mapped to the polygon while moving the original image area 62 in the texture space as shown in FIGS. It becomes possible.
[0059]
Next, it is determined whether or not the texture coordinates exceed a given value (step S2). That is, in FIG. 14, it is determined whether the V coordinate of the texture coordinate exceeds V2, for example. If not, the process returns to step S1.
[0060]
On the other hand, if it exceeds, it is determined whether or not the weather is changed (step S3). This determination is made based on virtual time measured using a timer or the like in the apparatus, and the weather is changed when, for example, a player's play time has passed a given period.
[0061]
If it is determined not to change the weather, the texture coordinates are returned to the initial values (step S4). That is, in FIG. 14, the V coordinate of the texture coordinate is returned to, for example, V1. By processing in this way, it is possible to express the state of clouds flowing while saving the storage capacity required for storing textures.
[0062]
If it is determined that the weather is to be changed, an offset value for moving the original image area 62 to the head of the connection area 84 is added to the texture coordinates (step S5). That is, in FIG. 14, the texture coordinate V coordinate becomes V3, for example, and an offset value that shifts the U coordinate to the right side is added to the texture coordinate.
[0063]
Next, as in step S1, a given offset value is added to the texture coordinates (step S6). Then, it is determined whether or not the texture coordinates exceed a given value (step S7). That is, in FIG. 14, it is determined whether or not the V coordinate of the texture coordinate exceeds V4. And when not exceeding, it returns to step S6.
[0064]
On the other hand, if it exceeds, an offset value for moving the original image area 62 to the head of the second area 82 is added to the texture coordinates (step S8). That is, in FIG. 14, an offset value that causes the V coordinate of the texture coordinate to become V5 and the U coordinate to shift to the right is added to the texture coordinate.
[0065]
By doing so, it is possible to express realistic conditions such as a cloud flowing, and to express smooth and natural weather changes and time zone changes.
[0066]
Next, an example of a hardware configuration capable of realizing the present embodiment will be described with reference to FIG. In the apparatus shown in the figure, a CPU 1000, a ROM 1002, a RAM 1004, an information storage medium 1006, a sound generation IC 1008, an image generation IC 1010, and I / O ports 1012, 1014 are connected to each other via a system bus 1016 so that data can be transmitted and received. A display 1018 is connected to the image generation IC 1010, a speaker 1020 is connected to the sound generation IC 1008, a control device 1022 is connected to the I / O port 1012, and a communication device 1024 is connected to the I / O port 1014. Has been.
[0067]
The information storage medium 1006 mainly stores programs, image data for expressing display objects, sound data, and the like. For example, a consumer game device uses a CD-ROM, game cassette, DVD, or the like as an information storage medium for storing a game program or the like. The arcade game machine uses a memory such as a ROM. In this case, the information storage medium 1006 is a ROM 1002.
[0068]
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 the player in accordance with the progress of the game to the device main body.
[0069]
In accordance with a program stored in the information storage medium 1006, a system program stored in the ROM 1002 (such as device initialization information), a signal input by the control device 1022, the CPU 1000 controls the entire device and performs various data processing. . The RAM 1004 is a storage means used as a work area of the CPU 1000 and stores the given contents of the information storage medium 1006 and the ROM 1002 or the calculation result of the CPU 1000. In addition, a data structure (for example, a structure of object data or texture data) having a logical configuration for realizing the present embodiment is constructed on this RAM or information storage medium.
[0070]
Further, this type of 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 is an integrated circuit that generates game sounds such as sound effects and background music based on information stored in the information storage medium 1006 and the ROM 1002, and the generated game sounds are output by the speaker 1020. The image generation IC 1010 is an integrated circuit that generates pixel information to be output to the display 1018 based on image information sent from the RAM 1004, the ROM 1002, the information storage medium 1006, and the like. As the display 1018, a so-called head mounted display (HMD) can be used.
[0071]
The communication device 1024 exchanges various types of information used inside the game device with the outside. The communication device 1024 is connected to other game devices to send and receive given information according to the game program, and to connect a communication line. It is used for sending and receiving information such as game programs.
[0072]
1 to 14 includes an information storage medium 1006 that stores a program for performing the processing shown in the flowchart of FIG. 15, a CPU 1000 that operates according to the program, an image generation IC 1010, a sound generation IC 1008, and the like. It is realized by. The processing performed by the image generation IC 1010, the sound generation IC 1008, and the like may be performed by software using the CPU 1000 or a general-purpose DSP.
[0073]
FIG. 1 described above shows an example in which the present embodiment is applied to an arcade game machine. In this case, a CPU, an image generation IC, a sound generation IC, and the like are mounted on a system board 1106 built in the apparatus. Information for mapping the image in the original image area to the farthest view object while moving the original image area corresponding to the image after mapping in the space where the image before mapping is defined, in the object space Information for generating an image including the image of the farthest view object, the first weather or the first time zone in the space in which the image before mapping is defined. A first area in which an image for representation is defined and a second area in which an image for representing the second weather or the second time zone is defined are provided, and the original image area is defined as the first area. Information for moving from the first area to the second area is stored in a memory 1108 which is an information storage medium on the system board 1106. Hereinafter, these pieces of information are referred to as stored information. The stored information includes at least one of program code, image information, sound information, display object shape information, table data, list data, player information, and the like for performing the various processes described above.
[0074]
FIG. 17A shows an example in which the present embodiment is applied to a home game device. The player enjoys the game by operating the game controllers 1202 and 1204 while viewing the game image displayed on the display 1200. In this case, the stored information is stored in a CD-ROM 1206, IC cards 1208, 1209, etc., which are information storage media detachable from the main unit.
[0075]
FIG. 17B 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. Show. In this case, the stored information is 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, for example. When the terminals 1304-1 to 1304-n have a CPU, an image generation IC, and a sound generation IC and can generate a game image and a game sound stand-alone, the host device 1300 receives a game image and a game A game program or the like for generating sound is delivered to the terminals 1304-1 to 1304-n. On the other hand, if it cannot be generated stand-alone, the host device 1300 generates a game image and a game sound, which is transmitted to the terminals 1304-1 to 1304-n and output at the terminal.
[0076]
The present invention is not limited to that described in the above embodiment, and various modifications can be made.
[0077]
For example, in the present embodiment, the case of performing image mapping to the farthest view object using texture mapping has been described, but the present invention is not limited to this. For example, image mapping to the farthest object may be performed by a technique called voxel. Also, when texture mapping is performed, the texture space is not limited to two dimensions, and may be three dimensions. That is, texture mapping may be performed using a spatial texture.
[0078]
The shape of the farthest view object is not limited to that shown in FIGS. 3A, 3B, 11A, and 11B, and various modifications can be made.
[0079]
Further, the form of movement of the original image area is not limited to that described in the present embodiment, and various modifications can be made.
[0080]
Further, the method of bringing the colors of the first and second surfaces closer to the boundary is not limited to the method described with reference to FIGS.
[0081]
In the present embodiment, the case where the present invention is applied to a bicycle competition game has been described. However, the present invention is not limited to this, and various games (other competition games, sports games, battle games, role playing games, shooting games, etc.) ).
[0082]
The present invention is not limited to home and business game devices, but also various image generation devices such as a simulator, a large attraction device in which a large number of players participate, a personal computer, a multimedia terminal, and a system board for generating game images. It can also be applied to.
[0083]
[Brief description of the drawings]
FIG. 1 is an example of an external view of an image generation apparatus according to an embodiment.
FIG. 2 is an example of a functional block diagram of the image generation apparatus of the present embodiment.
FIGS. 3A and 3B are diagrams illustrating an example of a farthest view object.
4A and 4B are diagrams illustrating examples of images generated according to the present embodiment.
FIG. 5 is a diagram for explaining translational movement of an original image area in a texture space.
FIG. 6 is a diagram for explaining translational movement of an original image area in a texture space.
FIG. 7 is a diagram for explaining translational movement of an original image area in a texture space.
FIG. 8 is a diagram for explaining a rotational movement of an original image area in a texture space.
FIG. 9 is a diagram for explaining a technique for bringing the color of the end face and the side face closer to the boundary color.
FIGS. 10A and 10B are diagrams for explaining Gouraud shading and depth cueing. FIG.
FIGS. 11A and 11B are diagrams illustrating an example of a farthest view object.
FIG. 12 is a diagram for explaining a method of forming an end face by polygons arranged concentrically.
FIG. 13 is a diagram for explaining a technique for realizing a change in weather (time zone).
FIG. 14 is a diagram for explaining a technique for providing a connection region;
FIG. 15 is a flowchart for explaining a detailed processing example of the present embodiment;
FIG. 16 is a diagram illustrating an example of a hardware configuration capable of realizing the present embodiment.
FIGS. 17A and 17B are diagrams illustrating examples of various types of apparatuses to which the present embodiment is applied.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Operation part 12 Display part 16 Riding housing | casing 17 Saddle 18 Display 20 Mobile body (bicycle)
30 pedal 32 handle 40 course 42 start 44 goal 50 farthest view object 52 end face 54 (54-1 to 54-4) side face 60 texture 62 original image area 70 boundary 80 first area 82 second area 84 connection area 100 processing Unit 110 game calculation unit 112 moving object calculation unit 114 mapping unit 150 image generation unit 190 information storage medium

Claims (6)

An image generation device that generates an image at a given viewpoint in an object space in which a plurality of objects including a farthest view object for displaying a background are arranged,
In a space where an image before mapping is defined, an area movement processing means for performing processing for moving an original image area corresponding to the image after mapping in real time;
Mapping means for mapping an image in the moving original image area to the farthest object;
The farthest view object includes a first surface on which an image is mapped while the original image area moves in real time, and a second surface on which the image is mapped without moving the original image area in real time. The color of the first surface is changed so as to approach the boundary color as it approaches the boundary between the first and second surfaces, and the color of the second surface is changed as it approaches the boundary. Color change processing means for performing processing to change the color so as to approach the boundary color;
An image generation apparatus comprising: an image generation unit configured to generate an image at a given viewpoint in an object space and including an image of the farthest view object. In claim 1 ,
The color change processing means
An image generating apparatus, wherein the process of bringing the colors of the first and second surfaces closer to the color of the boundary is performed by at least one of Gouraud shading and depth cueing. In claim 1 or 2 ,
The image generating apparatus according to claim 1, wherein the first surface is formed by primitive surfaces arranged concentrically. In any one of claims 1 to 3,
In the space where the image before mapping is defined, a first region where an image for expressing the first weather or the first time zone is defined, and a second weather or the second time zone are defined. A second region in which an image to be expressed is defined,
The image generation apparatus characterized in that the area movement processing means moves the original image area from the first area to the second area. In claim 4 ,
In the space in which the image before mapping is defined, a connection image for expressing the first weather or the change from the first time zone to the second weather or the second time zone is defined. A connecting area is provided,
The image generation apparatus, wherein the area movement processing unit moves the original image area from the first area to the second area via the connection area. A computer-readable information storage medium for generating an image at a given viewpoint in an object space in which a plurality of objects including a farthest object for displaying a background are arranged,
In a space where an image before mapping is defined, an area movement processing means for performing processing for moving an original image area corresponding to the image after mapping in real time;
Mapping means for mapping an image in the moving original image area to the farthest object;
The farthest view object includes a first surface on which an image is mapped while the original image area moves in real time, and a second surface on which the image is mapped without moving the original image area in real time. The color of the first surface is changed so as to approach the boundary color as it approaches the boundary between the first and second surfaces, and the color of the second surface is changed as it approaches the boundary. Color change processing means for performing processing to change the color so as to approach the boundary color;
As an image generation means for generating an image at a given viewpoint in the object space and including an image of the farthest view object,
An information storage medium storing a program that causes a computer to function.

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