JP4183104B2 - GAME DEVICE AND INFORMATION STORAGE MEDIUM - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a game device and an information storage medium.
[0002]
[Background Art and Problems to be Solved by the Invention]
2. Description of the Related Art Conventionally, a game apparatus that arranges a plurality of objects in an object space that is a virtual three-dimensional space and generates an image that can be seen from a given viewpoint in the object space is known, and a so-called virtual reality can be experienced. Popular as a thing. Taking a game device that can enjoy a competitive game by boat as an example, a player runs a boat operated by himself / herself on a course in the object space and competes with a boat operated by another player or a computer. Enjoy.
[0003]
However, conventional game devices have not been able to realize a realistic expression of waves generated as the boat travels. In other words, the wave object whose shape and pattern do not change is simply accompanied by the boat, and the displayed image is monotonous. For this reason, the virtual reality that the player feels cannot be improved.
[0004]
Further, a technique called texture mapping has been conventionally known as a technique for improving the quality of game images. In this texture mapping, the texture (texture information) is read from the texture information storage unit based on the texture coordinates given to the vertex of the object, and the read texture is mapped to the object. According to this texture mapping, a high quality image can be obtained with a small amount of data.
[0005]
However, in the texture mapping so far, the texture coordinates (UV coordinates) for designating the texture are fixed values and do not change. For this reason, the variety of the image cannot be increased.
[0006]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a game device and an information storage medium capable of realizing an unprecedented image expression using texture mapping. There is to do.
[0007]
Another object of the present invention is to provide a game apparatus and an information storage medium that enable realistic expression of an object accompanying a moving body moving on a given plane.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a game apparatus for generating an image, a means for storing texture information specified by texture coordinates given to each vertex of an object, Using the first texture coordinates that are given to the first vertex group and that do not change with time, and the second texture coordinates that are given to the second vertex group of the object and change with time, the texture is applied to the object. And means for performing a process of mapping.
[0009]
The information storage medium according to the present invention includes information for realizing the above means.
[0010]
According to the present invention, the first texture coordinates of the first vertex group (which may have one vertex) of the object do not change with time, and the second vertex group (which may have one vertex) does not change. The second texture coordinates change with time. As a result, it is possible to make an expression as if the texture image looks distorted, and it is possible to increase variations of the image that is expressed while using one texture.
[0011]
The game device and the information storage medium according to the present invention are characterized in that the second texture coordinates are changed in real time as time passes. In this way, it becomes possible to change the distortion of the image in real time according to the game situation or the like.
[0012]
The present invention is also a game device for generating an image, comprising means for storing texture information specified by texture coordinates given to each vertex of an object, and a first vertex group of each object. Means for storing object information of a plurality of objects, wherein the given first texture coordinates are the same among the objects and the second texture coordinates given to the second vertex group are different among the objects; Means for performing a process of mapping a texture to an object using texture coordinates included in information, and means for performing a process of sequentially replacing the plurality of objects with the passage of time in order to represent one display object It is characterized by including.
[0013]
The information storage medium according to the present invention includes information for realizing the above means.
[0014]
According to the present invention, the objects for representing the display object are sequentially replaced with time, for example, from the first object to the second object and from the second object to the third object. For example, between the first and second objects, the first texture coordinates of the first vertex group are the same, but the second texture coordinates of the second vertex group are different. Therefore, by replacing the first object with the second object, the texture coordinates can be locally changed, and image distortion and the like can be expressed.
[0015]
The game device and the information storage medium according to the present invention are characterized in that the shapes of the plurality of objects that are sequentially replaced with the passage of time are different from each other. In this way, it becomes possible to express distortion more than image distortion due to local changes in texture coordinates. In the present invention, an object having the same shape may be included in a plurality of objects.
[0016]
The game device and information storage medium according to the present invention are characterized in that the texture coordinates of the second vertex group are obtained by a periodic function. If texture coordinates are obtained using a periodic function in this way, processing such as changing texture coordinates can be simplified.
[0017]
The game device and the information storage medium according to the present invention are characterized in that the second vertex group includes a plurality of groups. In this way, it is possible to change the texture coordinates at one second vertex group so as to be different from the changes in the texture coordinates at the other second vertex group. Thereby, the variation of the image represented can be increased.
[0018]
In the game device and the information storage medium according to the present invention, the texture coordinates of each second vertex group can be obtained by each periodic function, and at least one of the waveform, phase, and period of each periodic function differs between the periodic functions. It is characterized by that. In this way, by varying the waveform, phase, and period between periodic functions, it is possible to express various distortion images while using one texture.
[0019]
Further, the present invention is a game apparatus for generating an image, for controlling movement information of a moving body that moves in an object space, and for controlling a shape of an accompanying object that accompanies the moving body. In order to control the shape of the accompanying object based on the means for moving the control point at a larger initial speed as the speed of the moving body is increased and decelerating at a given acceleration, and the control point Means.
[0020]
The information storage medium according to the present invention includes information for realizing the above means.
[0021]
According to the present invention, the shape of the accompanying object of the moving body is controlled based on the control point that moves at an initial speed corresponding to the speed of the moving body and decelerates at a given acceleration. In this way, the speed of the moving object can be reflected in the shape of the accompanying object, and a more realistic simulation of the shape change of the accompanying object can be realized.
[0022]
In addition, the present invention is a game device for generating an image for calculating movement information of a moving body that moves in an object space while sinking a part of a given surface whose height changes. And a control point for controlling the shape of the accompanying object accompanying the moving object at a higher initial speed as the moving object sinks deeper into the given plane. The apparatus includes means for performing a process of decelerating by acceleration, and means for controlling the shape of the accompanying object based on the control point.
[0023]
The information storage medium according to the present invention includes information for realizing the above means.
[0024]
According to the present invention, the shape of the accompanying object of the moving object is controlled based on the control point that moves at an initial speed corresponding to the submerged depth of the moving object and decelerates at a given acceleration. In this way, the sinking depth of the moving object can be reflected in the shape of the accompanying object, and a more realistic simulation of the shape change of the accompanying object can be realized.
[0025]
In addition, the game device and the information storage medium according to the present invention sequentially move the control point at the initial speed as time passes, and the position of the control point moved farthest from the initial position among the plurality of sequentially moved control points. Based on the above, the shape of the accompanying object is controlled. In this way, a realistic change in the shape of the accompanying object over time can be realized with simple processing.
[0026]
In addition, the game device and the information storage medium according to the present invention control the shape of the accompanying object by scaling the accompanying object in a given direction. In this way, the shape of the accompanying object can be controlled by a process with a small burden.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the following, the case where the present invention is applied to a fishing game will be described as an example. However, the present invention is not limited to this and can be applied to various games. In the following description, the case where one or a plurality of primitive surfaces constituting an object is a polygon will be described as an example. However, the present invention is not limited to this, and the object is configured by a primitive surface other than a polygon (for example, a curved surface). It can also be applied to
[0028]
1. Constitution
FIG. 1 shows an example of an external view of the game apparatus according to the present embodiment.
[0029]
This game apparatus has an arm 802 attached and fixed to the housing 800, and a rod 804 attached and fixed to the arm 802 so as to be rotatable up and down and left and right. At the rear end of the rod 804, a reel 806 and an operation button 808 functioning as a game start button or the like are provided.
[0030]
This game device is provided with a slot 820 for inserting a memory card (portable information storage device including a portable game device (PDA) in a broad sense) that can also be used in a home game device. Yes.
[0031]
When the fishing game starts, the player first performs casting. Then, the grip 809 of the rod 804 is gripped, and the rod 804 is moved up and down and left and right while winding the reel 806. Thereby, the lure 814 projected on the screen 810 moves, and the fish 812 projected on the screen 810 can be invited. And when the fish 812 is hit, the reel 806 is wound up while watching the pulling state of the fish 812. Then, the fish 812 is picked up while taking care not to cut the line 816.
[0032]
When the player picks up the fish 812, a screen is displayed that allows the player to select whether to take the fish home. When the player wishes to take the fish 812 home, information on the fish caught (image display information for displaying the caught fish on a home game device, accompanying information for characterizing the individuality of the fish, etc.) is stored in the slot 820. It is written to the inserted memory card. The player can take this memory card home and insert it into the slot of the home game device, so that the player can enjoy watching, collecting, and breeding the caught fish on the home game device.
[0033]
FIG. 2 shows an example of a block diagram of the present embodiment.
[0034]
Here, the processing unit 100 performs various processing such as control of the entire device, instruction instruction to each block in the device, game calculation, etc., and its functions are CPU (CISC type, RISC type), It can be realized by hardware such as DSP, ASIC (gate array, etc.) or a given program (game program).
[0035]
The operation unit 130 is used by the player to input operation information, and the function can be realized by hardware such as the arm 802, the rod 804, the reel 806, and the operation button 808 shown in FIG.
[0036]
The storage unit 140 serves as a work area such as the processing unit 100, the image generation unit 160, the sound generation unit 170, the communication unit 174, and the I / F unit 176, and its functions can be realized by hardware such as a RAM.
[0037]
An information storage medium (storage medium from which information can be read by a computer) 150 stores information such as programs and data, and functions thereof are an optical disk (CD, DVD), a magneto-optical disk (MO), and a magnetic field. This can be realized by hardware such as a disk, a hard disk, a magnetic tape, and a semiconductor memory (ROM). The processing unit 100 performs various processes of the present invention (this embodiment) based on information stored in the information storage medium 150. That is, the information storage medium 150 stores various information for realizing the present invention (this embodiment).
[0038]
Part or all of the information stored in the information storage medium 150 is transferred to the storage unit 140 when the apparatus is powered on. Information stored in the information storage medium 150 includes program code, image information, sound information, shape information of display objects, table data, list data, player information, and processing of the present invention. It includes at least one of information for instructing, information for performing processing in accordance with the instruction, and the like.
[0039]
The image generation unit 160 generates various images in accordance with instructions from the processing unit 100 and outputs them to the display unit 162. The functions of the image generation unit 160 include hardware such as an image generation ASIC, CPU, and DSP, This can be realized by a given program (image generation program) and image information.
[0040]
The sound generation unit 170 generates various sounds in accordance with instructions from the processing unit 100 and outputs them to the sound output unit 172. The function of the sound generation unit 170 includes hardware such as a sound generation ASIC, CPU, and DSP. It can be realized by a given program (sound generation program) and sound information (waveform data, etc.).
[0041]
The communication unit 174 performs various controls for communicating with an external device (for example, a host device or another game device), and functions as hardware or a place such as a communication ASIC or CPU. This can be realized by a given program (communication program).
[0042]
Information for realizing the processing of the present invention (this embodiment) may be distributed from the information storage medium of the host device to the information storage medium of the game device via the network and the communication unit 174. Such use of the information storage medium of the host device and use of the information storage medium of the game device are also included in the scope of the present invention.
[0043]
Further, some or all of the functions of the image generation unit 160, the sound generation unit 170, and the communication unit 174 may be realized by the function of the processing unit 100.
[0044]
The I / F unit 176 serves as an interface for exchanging information with a memory card (portable information storage device in a broad sense) 180 in accordance with an instruction from the processing unit 100. This can be realized by the slot 820 in FIG. 1 or a data write / read controller IC controlled by a command from the CPU. In the case where information exchange with the memory card 180 is realized using radio waves such as infrared rays, the function of the I / F unit 176 can be realized by hardware such as a semiconductor laser and an infrared sensor.
[0045]
The processing unit 100 includes a game calculation unit 110.
[0046]
Here, the game calculation unit 110 receives coins (price) acceptance processing, game mode setting processing, game progress processing, selection screen setting processing, and processing for determining the position and direction of a moving object (boat, fish, character, etc.). , Processing to determine the viewpoint position and line-of-sight direction, processing to reproduce the motion of the moving body, processing to place an object in the object space, hit check processing, processing to calculate game results (results), game space where multiple players are common Various game calculation processes such as a process for playing the game or a game over process are performed based on operation information from the operation unit 130, information from the memory card 180, a game program, and the like. When the present invention is applied to a game other than a fishing game, as a moving body, in addition to a boat, a fish, and a character, a ship (battleship, submarine, yacht, motorboat, etc.), water bike, water ski, surfboard Various things such as cars, motorcycles, tanks, robots, airplanes, spaceships, balls, and bullets can be considered.
[0047]
The game calculation unit 110 includes a moving body calculation unit 112, a mapping processing unit 114, an object replacement unit 116, a texture coordinate change unit 118, a control point processing unit 120, and an object shape control unit 122.
[0048]
Here, the moving object calculation unit 112 calculates movement information (position information, direction information, etc.) of a moving object such as a boat. For example, based on operation information input from the operation unit 130 or a given program, Processing to move the moving object in the object space is performed. That is, a process of moving the moving body in the object space is performed based on operation information from the player (self player, other player) and a command from the computer (a given movement control algorithm).
[0049]
More specifically, the moving body computing unit 112 performs a process for obtaining the position and direction of the moving body, for example, every frame (1/60 seconds). 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).
[0050]
PMk = PMk-1 + VMk-1 * .DELTA.t (1)
VMk = VMk-1 + AMk-1 * .DELTA.t (2)
The mapping processing unit 114 performs processing for mapping a texture to an object. More specifically, the first texture coordinates that are given to the first vertex group of the object (which may be one vertex) and do not change with time, and the second vertex group of the object (even if there is one vertex) And the second texture coordinates that change with the passage of time are used to perform texture mapping processing.
[0051]
Note that texture information to be mapped is stored in the texture information storage unit 142. That is, the texture information storage unit 142 stores texture information designated by texture coordinates given to each vertex of the object. Here, as the texture information stored in the texture information storage unit 142, various information such as color information, transparency information, luminance information, surface shape information, reflectance information, refractive index information, and depth information can be considered. .
[0052]
The object replacement unit 116 performs processing for sequentially replacing a plurality of objects with the passage of time in order to express one display object. More specifically, a process of sequentially replacing the wave objects for expressing the waves generated as the boat travels as time passes is performed. Here, it is desirable that the shapes of the objects that are sequentially replaced as time elapses are different from each other.
[0053]
Note that information on the object to be replaced is stored in the object information storage unit 144. That is, in the object information storage unit 144, the first texture coordinates given to the first vertex group of each object are the same among the objects, and the second texture coordinates given to the second vertex group are the same between the objects. The object information of a plurality of objects different from each other is stored. Here, as the stored object information, various information such as texture coordinates and luminance information given to each vertex of the object, position information of each vertex of the object, and the like can be considered. The mapping processing unit 114 performs processing for mapping the texture to the object based on the texture coordinates included in the object information.
[0054]
The texture coordinate changing unit 118 performs a process for changing the second texture coordinates given to the second vertex group of the object in real time as time passes. That is, the change of the second texture coordinate of the second vertex group with the passage of time may be realized by replacing the object by the object replacing unit 116 or by changing the texture coordinate by the texture coordinate changing unit 118. May be.
[0055]
The control point processing unit 120 moves a control point for controlling the shape of a wave object (accompanied object in a broad sense) associated with a moving body at a given initial speed, and at a given acceleration, for example, gravitational acceleration. The process for decelerating is performed. Then, the object shape control unit 122 performs processing for controlling the shape of the wave object (for example, processing for scaling the wave object in a given direction) based on the control points. In this case, the control point is moved at a larger initial speed as the moving body speed increases, or the moving body sinks into the water surface (a given surface whose height changes in a broad sense) (draft depth). It is desirable to move the moving body at a larger initial speed as the depth becomes deeper. Further, the control point is sequentially moved at the initial speed as described above with the passage of time, and the wave object (based on the position of the control point that is moved farthest from the initial position among the plurality of control points that are sequentially moved) It is desirable to control the shape of the accompanying object).
[0056]
2. Features of this embodiment
3A, 3B, 4A, 4B, and 4C show examples of game images generated by the present embodiment.
[0057]
When the game is started, as shown in FIG. 3A, a boat 30 on which a virtual player (character object) 20 as a substitute for the player rides heads to the cast area 22. Next, a game image as shown in FIG. 3B is displayed, and the player selects a cast point. Then, the player operates the rod 804 in FIG. 1 to play a game for catching fish.
[0058]
Now, when the boat (moving body) 30 goes to the cast area 22 as shown in FIG. 3 (A), in this embodiment, as shown in FIGS. 4 (A), (B), and (C), Attempts are made to realistically represent the waves 32 generated by traveling. That is, the shape of the wave 32 is changed with time, and the image mapped to the wave 32 is distorted. This makes it possible to provide a player with a realistic image that has never existed before.
[0059]
The first feature of the present embodiment is that the texture coordinates given to each vertex of an object (configured by one or more primitive surfaces) are locally changed to represent image distortion. .
[0060]
More specifically, as shown in FIG. 5, with respect to the texture coordinates (TX1, TY1), (TX2, TY2) given to the first vertex group VE1, VE2 of the object OB, the value is changed with time. Do not change. On the other hand, the values of the texture coordinates (TX3, TY3), (TX4, TY4) given to the second vertex group VE3, VE4 of the object OB are changed with time. In this way, the distortion of the image of the object OB can be expressed using a single texture. That is, image variations can be increased without increasing the used storage capacity of the texture information storage unit 142 so much.
[0061]
The distortion of the image mapped to the wave 32 as shown in FIGS. 4A, 4B, and 4C can be realized as follows.
[0062]
That is, first, for example, a texture as shown by E1 in FIG. 6 is prepared. The texture here is mapped to an object composed of a plurality of polygons PG1 to PG36 as shown by E2.
[0063]
Then, as indicated by F1, F2, F3, and F4 in FIG. 7, the texture coordinates of the line 40 and the texture coordinates of the line 42 are changed over time. That is, in FIG. 7, a plurality of second vertex groups (group of lines 40 and group of lines 42) for changing texture coordinates are provided. By doing so, the texture pattern boundaries 44 appear to change over time as shown in G1, G2, G3, and G4 in FIG. 7, and a realistic expression of image distortion becomes possible. .
[0064]
In FIG. 7, there are two lines 40 and 42 for changing the texture coordinates (although there are two groups of second vertices), but there may be one line as shown in FIG. ) May be a single group). Further, the number of lines for changing the texture coordinates may be three or more (three or more second vertex groups may be provided). If there are two or more lines for changing the texture coordinates, it is possible to increase the variation of images that can be expressed.
[0065]
Further, as shown in FIG. 7, it is desirable to obtain the texture coordinates of the lines 40 and 42 by a periodic function (for example, a sine function). If texture coordinates are obtained using such a periodic function, the process of changing the texture coordinates can be simplified.
[0066]
In this case, it is desirable to vary the waveform, phase, and period of the periodic function between the periodic functions.
[0067]
For example, in FIG. 9, the waveform of the first periodic function for obtaining the texture coordinates of the line 40 and the waveform of the second periodic function for obtaining the texture coordinates of the line 42 are different from each other. By doing so, as shown in H1, H2, H3, and H4 in FIG. 9, an image with a more severe degree of distortion can be expressed.
[0068]
In FIG. 10A, the phase of the first periodic function for obtaining the texture coordinates of the line 40 and the phase of the second periodic function for obtaining the texture coordinates of the line 42 are different from each other. In FIG. 10B, the period of the first periodic function for obtaining the texture coordinates of the line 40 and the period of the second periodic function for obtaining the texture coordinates of the line 42 are different from each other.
[0069]
In this way, if the waveforms, phases, and periods of the first and second periodic functions are different from each other, various image distortions can be expressed using one texture. That is, it is possible to enrich image expression variations with a small amount of data.
[0070]
Now, as a technique to change texture coordinates locally with the passage of time, a technique of changing texture coordinates in real time with the passage of time and a technique of sequentially replacing a plurality of objects having different texture coordinates with the passage of time. Can be considered. In this case, in order to increase the variation of the image to be expressed, a method of sequentially replacing a plurality of objects is desirable.
[0071]
For example, a plurality of wave objects as shown in FIG. 11 are prepared in advance as objects representing waves. That is, object information of a plurality of wave objects for expressing one wave is stored in the object information storage unit 144 of FIG.
[0072]
For example, FIG. 12 shows an example of object information of these plural objects. As shown in FIG. 12, the texture coordinates (TX1, TY1), (TX2, TY2) given to the first vertex group VE1, VE2 of each object OB1, OB2, OB3 are between the objects OB1, OB2, OB3. They are identical to each other. On the other hand, the texture coordinates (TX3, TY3), (TX4, TY4) given to the second vertex groups VE3, VE4 are different from each other among the objects OB1, OB2, OB3.
[0073]
If such OB1, OB2, OB3, and the like are sequentially replaced with the passage of time, the texture coordinates can be locally changed with the passage of time.
[0074]
Moreover, at this time, by making the shapes of the plurality of objects that are sequentially replaced with the passage of time different from each other as shown in FIG. 11, it is possible to obtain a video effect that is more than the distortion caused by the local change of the texture coordinates. it can.
[0075]
FIG. 13A shows an example in which only replacement of an object is performed without changing texture coordinates locally (when only the shape of the object is changed). FIG. 13B shows an example in which the texture coordinates are locally changed and the object is replaced (the object shape is also changed). As shown in FIG. 13B, by changing the texture coordinates locally and also replacing the objects, it is possible to display an image that looks more distorted. As a result, as shown in FIGS. 4A, 4B, and 4C, a more realistic wave 32 can be expressed. Further, the amount of data required when only object replacement is performed as shown in FIG. 13A (data amount of object information), local change of texture coordinates and object replacement as shown in FIG. The amount of data required when both are performed is the same. That is, according to the method of FIG. 13B, it is possible to increase the real degree of distortion of an image without increasing the necessary data amount.
[0076]
The second feature of the present embodiment is that a control point for controlling the shape of a wave object (accompanied object in a broad sense) associated with a boat (moving body) is increased as the speed of the boat increases or the water surface (in a broad sense). Based on this control point, the deeper the boat sinks into the given plane where the height changes, the greater the initial speed and the lower the gravitational acceleration (the given acceleration in a broad sense). The point is to control the shape of the wave object.
[0077]
For example, as shown in FIG. 14A, when the speed VB of the boat 30 is high, the control point CP moves in the Y-axis direction (upward) at a large initial speed VC. After that, it is gradually decelerated by the gravitational acceleration GA. On the other hand, when the speed VB of the boat 30 is small, the control point CP moves in the Y-axis direction at a small initial speed VC and then gradually decelerates due to the gravitational acceleration GA. If the shape of the wave object (see the wave 32 in FIGS. 4A, 4B, and 4C) generated near the evaluation point 50 is controlled based on, for example, the Y coordinate of the control point CP, the boat 30 is controlled. Can be reflected in the shape of the wave object. For example, if the shape of the wave object is scaled larger in the Y-axis direction as the Y coordinate of the control point CP is larger, it is possible to simulate a phenomenon that the wave becomes higher as the speed VB of the boat 30 is larger.
[0078]
Further, as shown in FIG. 14B, when the submergence depth (draft) DW of the boat 30 at the evaluation point 50 that determines the point at which the wave is generated is deep, the control point CP becomes Y at a large initial speed VC. It moves in the axial direction and then gradually decelerates due to gravity acceleration GA. On the other hand, when the DW at the evaluation point 50 is shallow, the control point CP moves in the Y-axis direction at a small initial speed VC and then gradually decelerates due to the gravitational acceleration GA. If the shape of the wave object generated near the evaluation point 50 is controlled based on, for example, the Y coordinate of the control point CP, the sinking depth DW of the boat 30 can be reflected in the shape of the wave object. For example, if the shape of the wave object is scaled larger in the Y-axis direction as the Y coordinate of the control point CP is larger, it is possible to simulate a phenomenon that the wave becomes higher as the submergence depth DW of the boat 30 is deeper.
[0079]
More specifically, in the present embodiment, processing as described below is performed.
[0080]
That is, as shown in FIGS. 15 (A), (B), (C), (D), and (E), the control points CP1, CP2, CP3, CP4, CP5, etc. are changed with the speed VB of the boat 30 over time. And the submerged depth DW are sequentially moved in the Y-axis direction, and based on the position of the control point having the largest Y coordinate from the initial position among the sequentially moved control points, the wave object Control the shape.
[0081]
For example, in FIG. 15A, the control point CP1 moves in the Y-axis direction at a speed (initial speed) VC = 6.5 from a position (initial position) YC = 0.2, for example. In this case, the VC of CP1 is determined based on the speed VB of the boat 30 and the sinking depth DW at that time. That is, for example, VC = C1 × (C2 × VB ² + C3 × DW ² ) ^1/2 VC is determined by such a calculation formula (C1, C2, and C3 are constants). Then, YC and VC of CP1 are registered in the control point list 52.
[0082]
In FIG. 15B, the control point CP2 moves in the Y-axis direction, for example, from YC = −0.2 to VC = 4.0, and the YC and VC of this CP2 are registered in the control point list 52. Further, YC and VC of CP1 are calculated based on the gravitational acceleration, and the registered content of CP1 in the control point list 52 is updated.
[0083]
In FIG. 15C, the control point CP3 moves in the Y-axis direction, for example, from YC = 0.5 to VC = 5.0, and the YC and VC of this CP3 are registered in the control point list 52. Further, YC and VC of CP1 and CP2 are calculated based on the gravitational acceleration, and the registered contents of CP1 and CP2 in the control point list 52 are updated.
[0084]
In FIG. 15D, the control point CP4 moves in the Y-axis direction, for example, from YC = −0.3 to VC = 3.5, and the YC and VC of this CP4 are registered in the control point list 52. Further, YC and VC of CP1, CP2, and CP3 are calculated based on the gravitational acceleration, and the registered contents of CP1, CP2, and CP3 in the control point list 52 are updated.
[0085]
In FIG. 15E, the control point CP5 moves in the Y-axis direction, for example, from YC = 0.2 to VC = 7.0, and YC and VC of this CP5 are registered in the control point list 52. Further, since YC of CP1 becomes 0 or less, the registration of CP1 is deleted from the control point list 52. Further, YC and VC of CP2, CP3, and CP4 are calculated based on the gravitational acceleration, and the registered contents of CP2, CP3, and CP4 in the control point list 52 are updated.
[0086]
The shape of the wave object is controlled based on the Y coordinate of the control point having the largest Y coordinate among the plurality of control points. For example, in FIG. 15C, the shape of the wave object is controlled based on YC = 7.0, which is the Y coordinate of CP1. In FIG. 15D, the shape of the wave object is controlled based on YC = 4.5 of CP2, and in FIG. 15E, the shape of the wave object is controlled based on YC = 6.0 of CP3. The
[0087]
In the present embodiment, the control of the shape of the wave object is realized by changing the scaling value in the Y-axis direction of the wave object, for example, as shown in FIG. For example, the larger the Y coordinate of the control point, the larger the scaling value in the Y axis direction of the wave object. In this case, as described with reference to FIGS. 14A and 14B, the Y coordinate of the control point increases as the speed VB of the boat 30 increases and increases as the submergence depth DW of the boat 30 increases. Therefore, eventually, the larger the VB or the deeper DW, the larger the scaling value of the wave object in the Y-axis direction. As a result, it becomes possible to realistically simulate the phenomenon that the higher the boat speed or the deeper the sinking depth, the higher the wave.
[0088]
For example, if the simulation of the change in wave height is to be realized by physical calculation faithful to the real world phenomenon, the calculation load becomes enormous.
[0089]
On the other hand, in this embodiment, by introducing the concept of a control point that controls the wave height, it has succeeded in realizing a realistic simulation of changes in wave height with a small calculation load. . That is, according to the present embodiment, the control point is sequentially moved in the Y-axis direction at the initial speed VC determined based on VB and DW, and the scaling value of the wave object in the Y-axis direction is determined based on the Y coordinate of the control point. Realistic simulation of changes in wave height can be realized with simple processing with little load.
[0090]
3. Processing of this embodiment
Next, a detailed processing example of the present embodiment will be described with reference to the flowcharts of FIGS.
[0091]
FIG. 17 is a flowchart regarding processing for realizing a local change in texture coordinates by replacing an object.
[0092]
First, a wave object used in the frame is selected from a plurality of wave objects as shown in FIG. 11 (step S1). Next, the object information (see FIG. 12) of the selected wave object is read from the object information storage unit 144 (see FIG. 2) (step S2).
[0093]
Next, it is determined whether or not it is a frame for sampling the wave height (frame for registering a new control point in the control point list) (step S3). In the present embodiment, the wave height is sampled not every frame but every several frames (for example, every 3 to 10 frames). In the case of a frame for sampling the wave height, the initial position and initial velocity of the control point are set as described with reference to FIGS. 14 (A), (B), and FIGS. 15 (A) to (E). The determination is made based on the boat speed and the subduction depth, and the control point is registered in the control point list (step S4).
[0094]
Next, the Y coordinate of the control point registered in the control point list is calculated based on the gravitational acceleration and the speed of each control point (step S5). That is, the control point moved in the Y-axis direction at the initial speed is gradually decelerated by the gravitational acceleration.
[0095]
Next, the control point whose Y coordinate is 0 or less is deleted from the control point list (step S6). For example, in FIG. 15E, the control point CP1 is deleted from the control point list 52.
[0096]
Next, the scaling value (see FIG. 16) of the wave object is obtained based on the Y coordinate of the control point having the largest Y coordinate in the control point list (step S7).
[0097]
Next, based on the texture coordinates included in the object information read in step S2, the texture is mapped as described in FIGS. 5 to 10B, and based on the scaling value obtained in step S7. The wave object is scaled (step S8).
[0098]
FIG. 18 is a flowchart relating to processing for realizing a local change in texture coordinates by changing the texture coordinates of an object in real time.
[0099]
First, the object information of the wave object is read from the object information storage unit 144 (see FIG. 2) (step U1). Next, the texture coordinates included in the read object information are locally changed (step U2). This change process is performed by the texture coordinate changing unit 118 of FIG.
[0100]
Next, processing similar to steps S3 to S7 in FIG. 17 is performed to obtain a scaling value of the wave object (steps U3 to U7).
[0101]
Next, the texture is mapped based on the texture coordinates changed in step U2, and the wave object is scaled based on the scaling value obtained in step U7 (step U8).
[0102]
By performing the processing shown in FIG. 17 or FIG. 18, a realistic expression of the wave 32 as shown in FIGS. 4A, 4B, and 4C becomes possible.
[0103]
The present invention is not limited to that described in the above embodiment, and various modifications can be made.
[0104]
For example, the local change of the texture coordinate is particularly preferably realized by a method of replacing an object or a method of changing the texture coordinate in real time. However, in the present invention, it may be realized by a method different from these.
[0105]
In addition, it is particularly desirable that the texture coordinates to be locally changed are based on a periodic function as shown in FIGS. 7 to 10B, but the present invention is not limited to this. For example, the texture coordinates may be obtained by a function that is not a periodic function.
[0106]
In the present embodiment, the texture mapping to the wave object has been described as an example. However, the present invention is not limited to this and can be applied to the texture mapping to various objects other than the wave object. For example, the present invention can be applied to texture mapping to an explosion (flash) object that occurs when a bullet is fired or a bomb explodes. The present invention can also be applied to expressions such as sparkling display objects, liquid flowing, and waves approaching the beach.
[0107]
In addition, the initial speed of the control point may be determined by both the speed of the moving body and the sinking depth, or may be determined by either one.
[0108]
Further, in the present embodiment, the case where the moving body travels on the water surface has been described as an example, but a given surface whose height changes is not limited to such a water surface. For example, such a given surface can be a sandy surface when a vehicle travels in a desert. In this case, the accompanying object is, for example, a dust object.
[0109]
In this embodiment, the case where the accompanying object is scaled in the Y-axis direction (upward) has been described. However, the direction in which the accompanying object is scaled is not limited to the Y-axis direction. Control of the shape of the accompanying object is not limited to scaling in a given direction, and the shape may be controlled, for example, by replacing the object.
[0110]
In addition to fishing games, the present invention also provides various games (competition games such as car racing games, motorcycle games, and ski games, fighting games, robot battle games, sports games such as baseball and soccer, shooting games such as gun games, music, etc. It can be applied to performance games, dance games, role playing games, quiz games, puzzle games, and the like.
[0111]
The present invention is also applicable to various game devices such as a business game device, a home game device, a large attraction device in which a large number of players participate, a simulator, a multimedia terminal, an image generation device, and a system board for generating a game image. it can.
[0112]
[Brief description of the drawings]
FIG. 1 is an example of an external view of a game device according to an embodiment of the present invention.
FIG. 2 is an example of a block diagram of the game device according to the present embodiment.
FIGS. 3A and 3B are diagrams showing examples of game images generated according to the present embodiment.
FIGS. 4A, 4B, and 4C are diagrams showing examples of game images generated by the present embodiment. FIG.
FIG. 5 is a diagram for explaining a technique for locally changing texture coordinates;
FIG. 6 is a diagram illustrating an example of a texture to be mapped to an object and an object to be mapped.
FIG. 7 is a diagram for explaining an example in which two lines in which texture coordinates change are provided.
FIG. 8 is a diagram for explaining an example in which one line in which texture coordinates change is provided.
FIG. 9 is a diagram for explaining a method of making the waveforms of the first and second periodic functions for changing the texture coordinates of a line different from each other.
FIGS. 10A and 10B are diagrams for explaining a method of making the phases and periods of the first and second periodic functions for changing the texture coordinates of a line different from each other.
FIG. 11 is a diagram illustrating an example of a plurality of wave objects that are replaced as time elapses.
FIG. 12 is a diagram illustrating an example of object information.
FIG. 13A is a diagram for describing a technique for performing only object replacement, and FIG. 13B illustrates a technique for performing both local change of texture coordinates and object replacement. It is a figure for doing.
FIGS. 14A and 14B are diagrams for explaining a method of moving a control point at an initial speed according to the speed of the boat and the sinking depth, and decelerating the control point by gravitational acceleration. It is.
15 (A), (B), (C), (D), and (E) sequentially move the control points, and Y of the control point having the largest Y coordinate among a plurality of control points. It is a figure for demonstrating the method of controlling the shape of a wave object based on a coordinate.
FIG. 16 is a diagram for explaining scaling in the Y-axis direction of a wave object.
FIG. 17 is an example of a flowchart showing a detailed processing example of the present embodiment.
FIG. 18 is an example of a flowchart showing a detailed processing example of the present embodiment.
[Explanation of symbols]
20 Virtual player
22 Cast area
30 boat (moving body)
32 waves
40, 42 lines
44 Texture pattern border
50 evaluation points
52 Control point list
100 processor
110 Game calculation part
112 Mobile object calculation unit
114 Mapping processing unit
116 Object replacement part
118 Texture coordinate changing section
120 Control point processor
122 Object shape controller
130 Operation unit
140 Storage unit
142 Texture information storage unit
144 Object information storage unit
150 Information storage medium
160 Image generator
162 Display section
170 Sound generator
172 sound output unit
174 Communication Department
176 I / F section
180 Memory card (or PDA)
800 housing
802 Arm
804 rod
806 reel
808 operation buttons
810 screen
812 fish
814 Lure
816 lines
820 slots

Claims (16)

A game device for generating an image,
Means for storing texture information specified by texture coordinates given to each vertex of the object;
Using the first texture coordinates that are given to the first vertex group of the object and that do not change with time, and the second texture coordinates that are given to the second vertex group of the object and change with time, game apparatus characterized by comprising a means for performing a process of mapping the texture to the object. In claim 1,
The game apparatus, wherein the second texture coordinates are changed in real time with the passage of time. A game device for generating an image,
Means for storing texture information specified by texture coordinates given to each vertex of the object;
Object information of a plurality of objects in which the first texture coordinates given to the first vertex group of each object are the same among the objects and the second texture coordinates given to the second vertex group are different from each other between the objects. Means for memorizing;
Means for performing a process of mapping a texture to an object using a texture coordinate included in the object information;
A game apparatus comprising: means for performing a process of sequentially replacing the plurality of objects with the passage of time in order to represent one display object. In claim 3,
A game device characterized in that shapes of the plurality of objects that are sequentially replaced with time are different from each other. In any one of Claims 1 thru | or 4,
The game apparatus, wherein the texture coordinates of the second vertex group are obtained by a periodic function. In any one of Claims 1 thru | or 5,
A game apparatus comprising a plurality of the second vertex groups. In claim 6,
The texture coordinates of each second vertex group are obtained by each periodic function,
A game apparatus, wherein at least one of a waveform, a phase, and a period of each periodic function is different between the periodic functions. Computer
Means for storing texture information specified by texture coordinates given to each vertex of the object;
Using the first texture coordinates that are given to the first vertex group of the object and that do not change with time, and the second texture coordinates that are given to the second vertex group of the object and change with time, and means for processing for mapping a texture to the object,
An information storage medium storing a program for functioning as a storage medium. In claim 8,
An information storage medium characterized in that the second texture coordinates are changed in real time as time passes. Computer
Means for storing texture information specified by texture coordinates given to each vertex of the object;
Object information of a plurality of objects in which the first texture coordinates given to the first vertex group of each object are the same among the objects and the second texture coordinates given to the second vertex group are different from each other between the objects. Means for memorizing;
Means for performing a process of mapping a texture to an object using a texture coordinate included in the object information;
Means for performing a process of sequentially replacing the plurality of objects with the passage of time in order to represent one display object;
An information storage medium storing a program for functioning as a storage medium. In claim 10,
An information storage medium characterized in that shapes of the plurality of objects that are sequentially replaced as time elapses differ from each other. In any of claims 8 to 11,
The information storage medium, wherein the texture coordinates of the second vertex group are obtained by a periodic function. In any one of Claims 8 thru | or 12.
An information storage medium comprising a plurality of the second vertex groups. In claim 13,
The texture coordinates of each second vertex group are obtained by each periodic function,
An information storage medium, wherein at least one of a waveform, a phase, and a period of each periodic function is different between the periodic functions. A game device for generating an image,
  Means for storing texture information specified by texture coordinates given to each vertex of the object;
  A game apparatus comprising: means for performing a process of mapping a texture to an object using texture coordinates obtained by a periodic function and changing with the passage of time. Computer
  Means for storing texture information specified by texture coordinates given to each vertex of the object;
  Means for performing a process of mapping a texture to an object using texture coordinates obtained by a periodic function and changing over time;
  An information storage medium storing a program for functioning as a storage medium.

Images