JP3990068B2 - 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]
Recently, the popularity of a racing game apparatus that can perform a realistic driving simulation in pursuit of a realistic image is high. In such a racing game device or the like, a racing car object is often created using polygons.
[0003]
FIG. 12 shows a polygon model of a tire divided into six parts. When a tire is composed of polygons, a complete circle cannot be formed. Therefore, as shown in FIG. 12, for example, the hexagon 310 is divided into six parts and is composed of six equilateral triangular polygons (320-1 to 320-6). The tire is constructed by approximation.
[0004]
By the way, when trying to express the rotation of the tire according to the speed of the racing car in the racing game, it is necessary to change the rotation angle of the tire per inter according to the speed of the racing car on the game.
[0005]
However, if the rotation of the tire is changed in accordance with the speed, the rotation angle per inter may be aligned with the tire division angle. That is, for example, in FIG. 12, since the tire is divided into six, the rotation angle per inter is 60n (n is a natural number) degrees. In such a case, since the appearance of the tire did not change, it appeared that the tire did not rotate, or that it seemed to rotate very slowly.
[0006]
On the other hand, there was a method to control so that it always turns around when it exceeds a certain speed. According to this method, the above-mentioned problem can be avoided, but if the speed exceeds the speed, the method of rotating the tire on the screen does not change even if the speed of the racing car changes, and the speed change can be felt from the rotation of the tire. There wasn't. For this reason, there has been a problem that the rotation of the tire results in an image expression that has been applied to reality.
[0007]
The present invention has been made in view of such a conventional problem, and an object of the present invention is to prevent an inconvenience that the rotating object appears to stop, and to express the rotation of the object more accurately reflecting the game situation. To provide a game device and an information storage medium.
[0008]
[Means for Solving the Problems]
The present invention is a game device that generates an image of a rotating object, and when the object rotates by α degrees (0 <α ≦ 180), the theoretical rotation angle per unit frame of the object that appears to be substantially the same is near nα. When continuously changing, the actual rotation angle per unit frame is changed discontinuously in the vicinity of nα, so that the actual rotation angle per unit frame of the object rotates while avoiding a value near nα. And a rotation control unit that controls the rotation control unit and a unit that generates an image of the object rotated based on the control of the rotation control unit.
[0009]
The information storage medium according to the present invention includes information for realizing the above means.
[0010]
An object that looks substantially the same when rotated by α degrees (0 <α ≦ 180) is an object or the like in which each part has the same shape when divided by 360 / α around the center point. For example, when a polygon or a pattern having the same shape is arranged around the center point at a predetermined interval, a tire generated by a polygon that divides 360 / α around the center point, a ferris wheel, or the like is applicable.
[0011]
When they look almost the same, there are cases where they look exactly the same, for example, when the main parts match.
[0012]
Further, “per unit frame” means per unit frame for generating an image, and “theoretical rotation angle” means a rotation angle calculated according to a game situation or a player input situation. For example, the rotation angle of the tire per unit frame calculated according to the speed of the racing car in a racing game or the like is applicable. In general, when the tire is rotated at this theoretical rotation angle, an image can be generated so that a change in the speed of the racing car can be sensed from the rotation of the tire.
[0013]
However, if the theoretical rotation angle per unit frame matches nα, the object in the current frame and the object in the previous frame appear to have the same shape despite the rotation by nα. The problem of appearing to stop occurs.
[0014]
Therefore, in the present invention, when the theoretical rotation angle per unit frame of an object that looks almost the same when it rotates α degrees (0 <α ≦ 180) continuously changes in the vicinity of nα, the actual per unit frame Is controlled so that the actual rotation angle per unit frame of the object rotates while avoiding a value near nα.
[0015]
As a result, even when the theoretical rotation angle changes before and after nα, the actual rotation angle rotates while avoiding the vicinity of nα, so that it is possible to prevent a problem that it appears to stop apparently.
[0016]
The game apparatus of the present invention is characterized in that the rotation control means includes means for controlling the rotation of the object based on the theoretical rotation angle when the theoretical rotation angle is not in the vicinity of nα.
[0017]
The information storage medium according to the present invention includes information for realizing the above means.
[0018]
According to the present invention, when the theoretical rotation angle is not in the vicinity of nα, the rotation of the object is controlled based on the theoretical rotation angle. For this reason, it is possible to provide a game apparatus capable of expressing the rotation of the object more accurately reflecting the game situation.
[0019]
In the present invention, when the theoretical rotation angle is not in the vicinity of nα, not only is the case where the rotation of the object is controlled based on the theoretical rotation angle, but also the theoretical rotation angle is not in the vicinity of nα. Only when the above condition is satisfied, the rotation of the object is controlled based on the theoretical rotation angle.
[0020]
The present invention is a game apparatus for generating an image of a rotating object, and when rotating an object that looks almost the same when rotated by α degrees (0 <α ≦ 180), the rotation of the object per unit frame Rotation control means for controlling rotation so that the angle does not take a value close to nα, and means for generating an image of an object rotated based on the control of the rotation control means, the rotation control means comprising: Means for obtaining a theoretical rotation angle per unit frame of the object, and when the theoretical rotation angle is in the vicinity of nα (n is a natural number, 0 <α ≦ 180), the theoretical rotation angle is corrected in a direction away from nα. Means for controlling the rotation of the object based on the measured value and, if the theoretical rotation angle is not in the vicinity of nα, the rotation of the object is controlled based on the theoretical rotation angle. Characterized in that it comprises means for the.
[0021]
The information storage medium according to the present invention includes information for realizing the above means.
[0022]
According to the present invention, when the theoretical rotation angle is in the vicinity of nα (n is a natural number, 0 <α ≦ 180), the rotation of the object is based on a value obtained by correcting the theoretical rotation angle in a direction away from nα. If the theoretical rotation angle is not in the vicinity of nα, the rotation of the object is controlled based on the theoretical rotation angle. Therefore, it is possible to provide a game device that can prevent the problem of seemingly stopping and can express the rotation of the object more accurately reflecting the game situation.
[0023]
In the present invention, when the theoretical rotation angle is not in the vicinity of nα, not only is the case where the rotation of the object is controlled based on the theoretical rotation angle, but also the theoretical rotation angle is not in the vicinity of nα. Only when the above condition is satisfied, the rotation of the object is controlled based on the theoretical rotation angle.
[0024]
The game apparatus of the present invention is configured such that the rotation speed of the object increases or decreases based on an input situation of a player, and calculates the theoretical rotation angle based on the rotation speed of the object.
[0025]
The information storage medium according to the present invention includes information for realizing the above means.
[0026]
In a game in which the rotation speed is determined according to the input situation, it is possible to provide a game device rich in reality in which the player's sense of operation matches the apparent rotation. Therefore, for example, in a racing game or the like, it is possible to generate an image that allows the speed change of the racing car to be sensed from the rotation of the tire.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Next, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the embodiment described below, the case where the present invention is applied to a motorcycle game will be described as an example. However, the present invention is not limited to this, and can be applied to a game apparatus that performs various other games.
[0028]
FIG. 1 schematically shows an external view of the game apparatus according to the embodiment.
[0029]
The game apparatus according to the embodiment includes a simulated racing bike 1090 simulating an actual racing bike, and a display unit 1050 arranged in front of the simulated racing bike.
[0030]
While watching the game image displayed on the screen 1050, the player 1092 operates a handle 1070, an accelerator or a brake provided on the handle 1070, or a case (body) 1090 made by imitating a real motorcycle. Roll.
Then, when the player 1092 operates the accelerator and the brake, the moving body (bike) 1100 displayed on the screen 1050 is accelerated or decelerated. Further, when the player 1092 steers the handle 1070 or rolls the housing 1090, the moving body 1100 bends or rolls left and right.
[0031]
The simulated racing motorcycle 1090 is configured to be tiltable in the left-right direction, and the player 1092 straddling the motorcycle 1090 moves the center of gravity to the right or left, thereby tilting the motorcycle main body to the left and right to run in the game space. It is configured to steer a motorcycle.
[0032]
The simulated motorcycle 1090 of the embodiment is configured such that when it is tilted in the left-right direction, a restoring force corresponding to the traveling speed of the player motorcycle traveling in the game space is given as a reaction force toward the neutral position. Thus, the player can obtain the same feeling of operation as when riding an actual motorcycle, and also experience the same difficulty in operating a motorcycle as when operating an actual racing motorcycle.
[0033]
FIG. 2 shows an example of a functional block diagram of the game device of the present embodiment.
[0034]
Here, the operation unit 10 is for a player to input operation information, and the function can be realized by hardware such as the handle 1070 in FIG. 1, an accelerator or a brake provided on the handle 1070, and a housing 1090. .
[0035]
The processing unit 100 performs various processes such as control of the entire apparatus, instruction instruction to each block in the apparatus, and game calculation, and functions thereof are a CPU (CISC type, RISC type), DSP, ASIC. It can be realized by hardware such as (gate array) or a given program (game program).
[0036]
The storage unit 180 serves as, for example, a work area of the processing unit 100, and its function can be realized by hardware such as a RAM.
[0037]
An information storage medium (a storage medium from which information can be read by a computer) 190 stores programs and data. The function of the information storage medium 190 is, for example, an optical disk (CDROM, DVD), magneto-optical disk (MO), magnetic disk, hard disk, magnetic tape, portable information storage device (memory card, PDA, portable game device, game cassette). ) And hardware such as a semiconductor memory (ROM). The processing unit 100 performs various processes based on programs and data stored in the information storage medium 190.
[0038]
Part or all of the information stored in the information storage medium 190 is transferred to the storage unit 180 when the apparatus is powered on.
[0039]
The processing unit 100 includes a game calculation unit 110, an image generation unit 150, and a sound generation unit 160.
[0040]
Here, the game calculation unit 110 receives a coin (price) acceptance process, a game mode setting process, a game progress process, a selection screen setting process, a moving body (motorcycle, character, robot, car, tank, airplane, spaceship). , Processing to determine the position and direction of ships, boats, skis, surfboards, balls, bullets, etc.) processing to determine the viewpoint position and line-of-sight direction, processing to reproduce the motion of the moving object, processing to place the object in the object space, Various game calculation processes such as a hit check process, a process for calculating a game result (score), a process for a plurality of players to play in a common game space, a game over process, etc. Perform based on game programs.
[0041]
The image generation unit 150 generates a game image according to the game calculation in the game calculation unit 110. The game image generated by the image generation unit 150 is displayed on the display unit 12.
[0042]
The sound generation unit 160 generates a game sound according to the game calculation in the game calculation unit 110, and the game sound generated by the sound generation unit 160 is output from the sound output unit 14.
[0043]
The game calculation unit 110 includes a moving body calculation unit 120 and a rotation control unit 130.
[0044]
The moving object calculation unit 120 performs processing for moving the moving object in the object space based on operation information input from the operation unit 10 and a given program. 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).
[0045]
More specifically, the moving body computing unit 120 performs processing 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).
[0046]
PMk = PMk-1 + VMk-1 * .DELTA.t (1)
VMk = VMk-1 + AMk-1 * .DELTA.t (2)
Note that the moving body calculation unit 120 performs movement calculation processing of the player moving body by changing the braking effectiveness according to the brake input status of the player.
[0047]
When the rotation angle of the object per unit frame of the object that looks almost the same when it rotates α degrees (0 <α ≦ 180) continuously changes in the vicinity of nα, By changing the actual rotation angle discontinuously in the vicinity of nα, a process is performed to control the actual rotation angle per unit frame of the object so as to avoid the value near nα.
[0048]
Next, a characteristic operation example of the present embodiment will be described.
[0049]
FIGS. 3A, 3B, and 3C show objects that look almost the same when rotated 90 degrees. FIG. 3B shows a state when the object of FIG. 3A is rotated by 90 degrees, and FIG. 3C shows a state when the object of FIG. 3A is rotated by 180 degrees. Represents.
[0050]
An object that looks almost the same when rotated 90 degrees is configured so that each part has the same shape when divided into four around the center point. For example, a polygon or pattern having the same shape is the center. This is the case where the dots are arranged at predetermined intervals around the points. Here, a case where a tire is constituted by schematic objects as shown in FIGS. 3A, 3B, and 3C will be described as an example.
[0051]
4A, 4B, and 4C show the state of the tire for each frame when the tire is rotated at the theoretical rotation angle when the theoretical rotation angle per frame of the tire object is 90 degrees. Represents. Although the tire is proceeding to the right, there is a problem that the tire itself does not appear to rotate. This is because the form after rotation looks the same even though it is actually rotated, so it does not appear to rotate.
[0052]
In the present embodiment, the following processing is performed to avoid such problems and to faithfully reproduce the rotation of the tire by the theoretical rotation angle.
[0053]
FIG. 5 is a flowchart for explaining an operation example when generating a game image including tires in the present embodiment.
[0054]
In the present embodiment, the following processing is performed for each frame.
[0055]
First, the theoretical rotation angle ω per frame of the tire is obtained from the speed of the moving object (step S10).
[0056]
Ω ÷ α is calculated from the theoretical rotation angle ω and the tire division angle α, and an integer part N and a decimal part M are obtained (step S20).
[0057]
If 0 ≦ M <0.25, the rotation angle θ per frame is determined as follows (steps S30 and S40).
[0058]
θ = α {N + 0.25− (0.25−M) / 2}
If 0.25 ≦ M ≦ 0.75, the rotation angle θ per frame is determined as follows (steps S50 and S60).
[0059]
θ = α {N + M}
Other than that (if M> 0.75, the rotation angle θ per frame is determined as follows (step S70).
[0060]
θ = α {N + 0.75 + (M−0.75) / 2}
Then, an image is generated by turning the tire by θ per frame (step S80).
[0061]
FIG. 6 is a diagram for explaining the relationship between the theoretical rotation angle per unit frame and the actual rotation angle in the present embodiment.
[0062]
The vertical axis represents the actual rotation angle θ per unit frame, and the horizontal axis represents ω / α. A solid line 210 is a graph showing a change in the actual rotation angle per unit frame, and a one-dot chain line 220 is a graph showing a change in the theoretical rotation angle. In the present embodiment, when the theoretical rotation angle 220 of the tire changes continuously, the actual rotation angle 210 of the tire passes around the vicinity of α, 2α, 3α, which is a multiple of the tire's division angle α. In this way, it is discretely changed before and after α, 2α, 3α. Therefore, the graph 210 showing the actual change in the rotation angle per unit frame is discontinuous in the vicinity of α, 2α, 3α. Further, the graph 210 for obtaining the actual rotation angle is generated by correcting the inclination of the graph 220 representing the change in the theoretical rotation angle to reflect the change in the theoretical rotation angle even in the vicinity of α, 2α, 3α. .
[0063]
Also, except in the vicinity of α, 2α, 3α, etc., which are multiples of the tire division angle α, the actual rotation angle 210 is matched with the theoretical rotation angle, so that the rotation of the tire faithfully reflecting the theoretical rotation angle can be achieved. Is going.
[0064]
By doing so, it is possible to correct an apparent problem caused by the rotation angle per unit frame being a multiple of the tire division angle, and to express the rotation of the tire corresponding to the speed of the racing car.
[0065]
FIGS. 7A, 7B, and 7C are diagrams for explaining the rotation of the tire when 0 ≦ M <0.25. FIG. 7A is a diagram showing the state of the tire before rotation, and FIG. 7B is a diagram showing the state of the tire when rotated at the theoretical rotation angle. In the case of 0 ≦ M <0.25, since the apparent difference between the state of the tire when rotated at the theoretical rotation angle and the state of the tire before rotation is small, it does not rotate so much. Therefore, in this embodiment, as shown in FIG. 7C, the actual rotation angle is made larger than the theoretical rotation angle to correct an apparent defect.
[0066]
FIGS. 8A, 8B, and 8C are diagrams for explaining the rotation of the tire when M> 0.75. FIG. 8A is a view showing the state of the tire before rotation, and FIG. 8B is a view showing the state of the tire when rotated at a theoretical rotation angle. In the case of M> 0.75, since the apparent difference between the state of the tire when rotated at the theoretical rotation angle and the state of the tire before rotation is small, it does not rotate so much. Therefore, in this embodiment, as shown in FIG. 8C, the actual rotation angle is made smaller than the theoretical rotation angle to correct the apparent defect.
[0067]
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.
[0068]
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.
[0069]
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.
[0070]
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. A data structure having a logical configuration for realizing the present embodiment is constructed on the RAM or the information storage medium.
[0071]
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.
[0072]
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.
[0073]
The various processes described with reference to FIGS. 1 to 8 include an information storage medium 1006 that stores a program for performing the process shown in the flowchart of FIG. 5, 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.
[0074]
When the present embodiment is applied to an arcade game apparatus as shown in FIG. 1 described above, a CPU, an image generation IC, a sound generation IC, and the like are mounted on a system board (circuit board) 1106 built in the apparatus. The Then, based on at least one of the operation information from the player and the command from the computer, information for performing an operation for moving the moving body in the object space, and when rotated by α degrees (0 <α ≦ 180), When the theoretical rotation angle per unit frame of an object that looks almost the same continuously changes in the vicinity of nα, the actual rotation angle per unit frame is changed discontinuously in the vicinity of nα, thereby Information for controlling the actual rotation angle per unit frame so as to avoid the vicinity of nα, and information for generating an image of the object rotated based on the control of the rotation control means, etc. The data is stored in a semiconductor memory 1108 that 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 program code, image information, sound information, display object shape information, table data, list data, player information, information for instructing the processing of the present invention, It includes at least one piece of information for processing according to the instruction.
[0075]
FIG. 10A shows an example in which this 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, memory cards 1208, 1209, etc., which are information storage media detachable from the main unit.
[0076]
FIG. 10B shows a host apparatus 1300 and terminals 1304-1 to 1304- connected to the host apparatus 1300 via a communication line (small network such as a LAN or wide area network such as the Internet) 1302. An example in which the present embodiment is applied to a system including n will be shown. 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 semiconductor 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 processing IC and can generate game images and game sounds stand-alone, the host device 1300 receives game images and games. 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.
[0077]
In the case of the configuration shown in FIG. 10B, the processing of the present invention may be distributed and processed between the host device and the terminal (when a server is provided, the host device, the server, and the terminal). Good. The storage information for realizing the present invention is distributed to the information storage medium of the host device and the information storage medium of the terminal (or the information storage medium of the host device, the information storage medium of the server, and the information storage medium of the terminal). May be stored.
[0078]
The terminal connected to the communication line may be a home game device or an arcade game device. When the arcade game device is connected to a communication line, portable information storage that can exchange information with the arcade game device and also exchange information with the home game device. It is desirable to use a device (memory card, PDA, portable game device).
[0079]
The present invention is not limited to that described in the above embodiment, and various modifications can be made.
[0080]
In this embodiment, the example of the tire as shown in FIGS. 3A, 3B, and 3C has been described, but the present invention is not limited to this. For example, as shown in FIG. 12, it may be divided into 6 around the center point and the tire may be composed of 6 polygons. In this way, when the polygon division is rough, there is a problem that the polygon division angle and the rotation angle per unit frame coincide with each other, so that the rotation cannot be seen. However, according to the present invention, such a problem can be avoided. it can.
[0081]
Further, the present invention is not limited to polygon division, and any inconvenience may be generated as long as the main part of the rotating body looks the same when rotated by a predetermined angle. For example, it may be a case where the patterns constituting the rotating body appear to coincide when rotated by a predetermined rotation angle. The pattern may be composed of polygons or the like, or may be pasted with texture.
[0082]
FIG. 11 is a diagram showing a tire polygon model. When a tire is configured with a high model having a large number of polygons as shown in the figure, the tire itself is divided into polygons so as to have a shape almost similar to a circle. Therefore, in such a case, the position of the spokes as shown in 310-1 to 310-8 becomes a problem.
[0083]
In the case shown in FIG. 11, it can be considered that the tire is divided into eight by the arrangement of the spokes. That is, 360/8 = 45 (degrees), and when the tire rotates 45 degrees or a multiple thereof, it looks almost the same. For this reason, when the number of rotations per unit frame coincides with 45 degrees or a multiple thereof, there arises a problem that the rotation cannot be seen. The present invention includes a case of solving such a problem.
[0084]
In the present embodiment, the case where the rotating object is a tire has been described as an example, but the present invention is not limited to this. Any object may be used as long as it rotates, for example, a propeller, a windmill, a water wheel, a ferris wheel, a forklift box, and the like.
[0085]
The present invention can be applied not only to home and business game devices but also to various game 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. Applicable.
[Brief description of the drawings]
FIG. 1 is a schematic external view of a game device according to an embodiment of the present invention.
FIG. 2 is an example of a functional block diagram of the game device according to the present embodiment.
FIGS. 3A, 3B, and 3C represent objects that appear to be substantially the same when rotated 90 degrees.
4A, 4B, and 4C show tires for each frame when the tire is rotated at the theoretical rotation angle when the theoretical rotation angle per frame of the tire object is 90 degrees. The state of is expressed.
FIG. 5 is a flowchart for explaining an operation example when generating a game image including a tire in the present embodiment.
FIG. 6 is a diagram for explaining a relationship between a theoretical rotation angle per unit frame and an actual rotation angle in the present embodiment.
FIGS. 7A, 7B, and 7C are diagrams for explaining rotation of a tire when 0 ≦ M <0.25. FIGS.
FIGS. 8A, 8B, and 8C are diagrams for explaining rotation of a tire when M> 0.75.
FIG. 9 is a diagram for describing an example of a hardware configuration capable of realizing the present embodiment.
FIGS. 10A and 10B are diagrams illustrating examples of various types of apparatuses to which the exemplary embodiment is applied.
FIG. 11 is a diagram illustrating a polygon model of a tire.
FIG. 12 is a diagram showing a polygon model of a tire divided into six parts.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Operation part 12 Display part 14 Sound output part 100 Processing part 110 Game operation part 120 Moving body operation part 130 Rotation control part 150 Image generation part 160 Sound generation part 180 Storage part 190 Information storage medium 1050 Screen 1070 Handle 1090 Body 1092 Player 1100 Moving body

Claims (4)

A game device for generating an image of a rotating object,
a rotation control means for controlling the rotation of an object that looks substantially the same when rotated by α degrees (0 <α ≦ 180);
Means for generating an image of the rotated object based on the control of the rotation control means,
The rotation control means is
Means for obtaining a theoretical rotation angle per unit frame of the object;
A predetermined angle range that makes the theoretical rotation angle different from the actual rotation angle before and after nα (n is a natural number, 0 <α ≦ 180) is provided, and whether or not the theoretical rotation angle is within the predetermined angle range. Judging
When it is determined that the theoretical rotation angle is within the predetermined angle range and smaller than nα, an actual rotation angle obtained by correcting the theoretical rotation angle to a smaller value within the predetermined angle range is obtained and obtained. Controlling the rotation of the object based on the actual rotation angle,
When it is determined that the theoretical rotation angle is within the predetermined angle range and is larger than nα, an actual rotation angle obtained by correcting the theoretical rotation angle to a larger value within the predetermined angle range is obtained and obtained. Controlling the rotation of the object based on the actual rotation angle,
If it is determined that the theoretical rotation angle is not within the predetermined angle range, means for controlling the rotation of the object based on the theoretical rotation angle;
A game apparatus comprising: In claim 1,
The rotation control means is
A game apparatus, wherein a rotation speed of the object is obtained based on an input state of a player, and the theoretical rotation angle is calculated based on the rotation speed of the object. A computer-readable information storage medium for controlling a game device that generates an image of a rotating object,
a rotation control means for controlling the rotation of an object that looks substantially the same when rotated by α degrees (0 <α ≦ 180);
Storing a program for causing a computer to function as means for generating an image of an object rotated based on the control of the rotation control means;
The rotation control means is
Find the theoretical rotation angle per unit frame of the object,
A predetermined angle range that makes the theoretical rotation angle different from the actual rotation angle before and after nα (n is a natural number, 0 <α ≦ 180) is provided, and whether or not the theoretical rotation angle is within the predetermined angle range Judging
When it is determined that the theoretical rotation angle is within the predetermined angle range and smaller than nα, an actual rotation angle obtained by correcting the theoretical rotation angle to a smaller value within the predetermined angle range is obtained and obtained. Controlling the rotation of the object based on the actual rotation angle,
When it is determined that the theoretical rotation angle is within the predetermined angle range and is larger than nα, an actual rotation angle obtained by correcting the theoretical rotation angle to a larger value within the predetermined angle range is obtained and obtained. Controlling the rotation of the object based on the actual rotation angle,
When it is determined that the theoretical rotation angle is not within the predetermined angle range, the information storage medium controls rotation of the object based on the theoretical rotation angle. In claim 3,
The rotation control means is
An information storage medium characterized in that a rotation speed of the object is obtained based on an input state of a player, and the theoretical rotation angle is calculated based on the rotation speed of the object.

Images