JP2000296264A - Game apparatus and information storing medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a malfunction that a rotating object looks as stopping and enable a rotation expression accurately reflecting a game condition by having a control means for rotating an object with an actual rotation angle avoiding values in the vicinity of a predetermined rotation angle and a generating means of images rotated by the control. SOLUTION: A movable body operating section 120 carries out processing for obtaining position and direction of a movable body, for instance, for every frame. Also it changes the working level of a brake according to the brake input condition of a player, and carries out the moving operation processing of a player movable body. When for the rotation of α degree (0<α<=180), the about the same looking theoretical rotation angle per unit frame of an object changes continuously in the vicinity of nα, a rotation control section 130 carries out processing to control an object to rotate with the actual rotation angle avoiding nα by changing the actual rotation angle per unit frame discontinuously in the vicinity of nα. An image generating section 150 generates game images according to the game operation at a game operation section 110.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a game device and an information storage medium.

[0002]

2. Description of the Related Art Recently, a racing game apparatus capable of performing a more realistic driving simulation in pursuit of a realistic image has been very popular. In such a racing game device or the like, a racing car object is often created using polygons.

FIG. 12 is a diagram showing a polygon model of a tire divided into six parts. When a tire is made up of polygons, it is not possible to form a complete circle. Therefore, as shown in FIG.
The tire is configured by approximating a hexagon 310 consisting of 20-1 to 320-6).

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 in the game.

However, when the rotation of the tire is changed in accordance with the speed, the rotation angle per inter may be equal to the division angle of the tire. That is, for example, FIG.
In 2, the tire is divided into six parts, and the rotation angle per inter is 60n (n is a natural number) degrees. In such a case, the appearance of the tire does not change, so that it appears that the tire is not rotating, or that it appears to be rotating very slowly.

[0006] On the other hand, there has been a method of controlling the display so that it always looks around at a certain speed or higher. According to this method, the above problem can be avoided.However, when the speed exceeds the speed, even if the speed of the racing car changes, the manner of rotation of the tire on the screen does not change and the speed change can be sensed from the tire rotation. Did not. For this reason, there has been a problem that the rotation of the tire becomes an image expression based on reality.

The present invention has been made in view of such conventional problems, and has as its object to prevent a problem in which a rotating object stops appearing and to express the rotation of the object more accurately reflecting the game situation. It is an object of the present invention to provide a game device and an information storage medium capable of performing the above.

[0008]

SUMMARY OF THE INVENTION The present invention is directed to a game apparatus for generating an image of a rotating object, wherein an object looks substantially the same when rotated by α degrees (0 <α ≦ 180) per unit frame. Is the theoretical rotation angle of nα
In the case where the actual rotation angle per unit frame continuously changes near nα, the actual rotation angle per unit frame of the object avoids the vicinity value of nα by changing the actual rotation angle per unit frame discontinuously near nα. And a means for generating an image of the object rotated based on the control of the rotation control means.

[0009] An information storage medium according to the present invention is characterized by containing information for realizing the above means.

When rotated by α degrees (0 <α ≦ 180),
Objects that look almost the same are 3
An object or the like in which each part has the same shape when divided by 60 / α. For example, in the case where polygons or patterns having the same shape are arranged at predetermined intervals around the center point, a tire generated by a polygon that divides the periphery of the center point by 360 / α, a ferris wheel, and the like correspond.

When they look almost the same, they may look exactly the same or, for example, the main parts may coincide.

Further, per unit frame means per unit frame for generating an image, and the theoretical rotation angle means a rotation angle calculated based on a game situation or a player's input situation. For example, a rotation angle of a tire per unit frame calculated according to a speed of a racing car in a racing game or the like corresponds thereto. Generally, when the tire is rotated at the theoretical rotation angle, an image can be generated in which a change in the speed of the racing car can be sensed from the rotation of the tire.

However, if the theoretical rotation angle per unit frame coincides with nα, the object of the current frame and the object of the previous frame appear to have the same shape despite being rotated by nα. However, there is a problem in that it appears to stop.

Therefore, in the present invention, α degrees (0 <α ≦ 18)
0) When the theoretical rotation angle per unit frame of an object that looks almost the same when rotated is continuously changed near nα, the actual rotation angle per unit frame is changed discontinuously near nα. By doing so, the actual rotation angle of the object per unit frame is nα
Is controlled so as to avoid the vicinity value of.

Thus, even when the theoretical rotation angle changes before and after nα, the actual rotation angle rotates while avoiding a value near nα, so that it is possible to prevent a problem that the rotation angle appears to stop.

The game device according to 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 near nα.

Further, the information storage medium according to the present invention is characterized by containing information for realizing the above means.

According to the present invention, when the theoretical rotation angle is not near nα, the rotation of the object is controlled based on the theoretical rotation angle. Therefore, it is possible to provide a game device capable of expressing the rotation of an object that more accurately reflects a game situation.

The present invention is not limited to the case where the rotation of the object is always controlled based on the theoretical rotation angle when the theoretical rotation angle is not close to nα.
And the case where the rotation of the object is controlled based on the theoretical rotation angle only when a predetermined condition is satisfied.

The present invention relates to a game apparatus for generating an image of a rotating object, wherein α degrees (0 <α ≦ 180)
When rotating an object that looks almost the same when rotated, a rotation control unit that controls the rotation so that the rotation angle per unit frame of the object does not take a value near nα, and a control of the rotation control unit. Means for generating an image of the object rotated based on
The rotation control means for calculating a theoretical rotation angle of the object per unit frame; and the theoretical rotation angle when the theoretical rotation angle is close to nα (n is a natural number, 0 <α ≦ 180). Means for controlling the rotation of the object based on a value corrected in a direction away from nα,
Means for controlling the rotation of the object based on the theoretical rotation angle when the theoretical rotation angle is not close to nα.

Further, an information storage medium according to the present invention is characterized in that it contains information for realizing the above means.

According to the present invention, the theoretical rotation angle is nα
When (n is a natural number, 0 <α ≦ 180), the rotation of the object is controlled based on a value obtained by correcting the theoretical rotation angle in a direction away from nα, and the theoretical rotation angle is set near nα. If not, the rotation of the object is controlled based on the theoretical rotation angle. For this reason, it is possible to provide a game device capable of preventing the problem of apparently stopping and displaying the rotation of the object more accurately reflecting the game situation.

In the present invention, when the theoretical rotation angle is not in the vicinity of nα, not only is the rotation of the object always controlled based on the theoretical rotation angle, but also the theoretical rotation angle is nα.
And the case where the rotation of the object is controlled based on the theoretical rotation angle only when a predetermined condition is satisfied.

The game device according to the present invention is characterized in that the rotation speed of the object is increased or decreased based on the input state of the player, and the theoretical rotation angle is calculated based on the rotation speed of the object.

The information storage medium according to the present invention is characterized by including information for realizing the above means.

In a game in which the rotation speed is determined according to the input situation, it is possible to provide a highly realistic game device in which the player's operation sensation matches the apparent rotation. Therefore, for example, in a racing game or the like, it is possible to generate an image in which a change in the speed of the racing car can be sensed from the rotation of the tire.

[0027]

Next, a preferred embodiment of the present invention will be described in detail with reference to the drawings. In the embodiment described below, a 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 device that performs other various games.

FIG. 1 schematically shows an external view of the game apparatus of the embodiment.

The game device of the embodiment includes a simulated racing motorcycle 1090 simulating an actual racing motorcycle, and a display unit 1050 disposed in front of the simulated racing motorcycle 1090.

While watching the game image projected on the screen 1050, the player 1092
Alternatively, the user operates an accelerator or a brake provided on the steering wheel 1070 or rolls a housing (vehicle body) 1090 made to simulate a real motorcycle. And player 1
When the operator 092 operates the accelerator or the brake, the moving object (motorcycle) 1100 projected on the screen 1050 accelerates or decelerates. In addition, when the player 1092 steers the steering wheel 1070 or rolls the housing 1090, the moving body 1100 bends left and right or rolls.

The simulated racing motorcycle 1090 is configured to be tiltable in the left-right direction. The player 1092 straddling the motorcycle 1090 moves the center of gravity to the right or left to incline the motorcycle body left and right, thereby causing the game space in the game space to be tilted. It is configured to steer a motorcycle that travels.

The simulated motorcycle 1090 of the embodiment is configured such that when tilted in the left-right direction, a restoring force corresponding to the traveling speed of the player motorcycle traveling in the game space is applied as a reaction force toward the neutral position. As a result, the player can obtain the same operational feeling as riding a real motorcycle, and also experience the difficulty of operating the motorcycle as if operating a real racing motorcycle. .

FIG. 2 shows an example of a functional block diagram of the game device of the present embodiment.

Here, the operation unit 10 is for the player to input operation information.
Of the steering wheel 1070, an accelerator and a brake provided on the steering wheel 1070, a housing 1090, and the like.

The processing section 100 performs various processes such as control of the entire apparatus, instruction of instructions to each block in the apparatus, and game calculation.
Type, RISC type), DSP, ASIC (gate array, etc.) or a given program (game program).

The storage section 180 serves as, for example, a work area of the processing section 100, and its function can be realized by hardware such as a RAM.

An information storage medium (a storage medium from which information can be read by a computer) 190 stores programs and data. The functions of the information storage medium 190 include, for example, an optical disk (CDROM, DVD), a magneto-optical disk (MO), a magnetic disk, a hard disk, a magnetic tape, and a 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 the programs and data stored in the information storage medium 190.

Note that part or all of the information stored in the information storage medium 190 is stored in the storage unit 1 when the apparatus is powered on or the like.
80.

The processing section 100 includes a game calculation section 110, an image generation section 150, and a sound generation section 160.

Here, the game calculation section 110 performs processing for accepting coins (price), setting processing for a game mode, processing for proceeding with a game, setting processing for a selection screen, and moving objects (motorbikes, characters, robots, cars, tanks, airplanes). , Spaceships, ships,
Processing to determine the position and direction of boats, skis, surfboards, balls, bullets, etc., processing to determine the viewpoint position and line of sight, processing to reproduce the motion of moving objects, processing to place objects in object space, hit check processing Processing for calculating a game result (achievement), processing for a plurality of players to play in a common game space, or various game calculation processing such as game over processing, and the like. Perform based on.

The image generation unit 150 includes a game operation unit 110
A game image is generated according to the game calculation in. The game image generated by the image generation unit 150 is displayed on the display unit 12.

The sound generation section 160 generates a game sound according to the game calculation in the game calculation section 110, and the game sound generated by the sound generation section 160 is output from the sound output section 14.

The game operation section 110 is provided with a mobile object operation section 12.
0, and a rotation control unit 130.

The moving body operation section 120 performs a process of moving the moving body in the object space based on operation information input from the operation section 10 or a given program. That is,
Based on operation information from the players (the player itself and other players) and instructions from the computer (given movement control algorithm), a process of moving the moving object in the object space is performed.

More specifically, the moving body operation unit 120
The position and direction of the moving object is, for example, one frame (1/60 second)
The required process is performed every time. For example, in the (k-1) frame, the position of the moving object is PMk-1, the speed is VMk-1, and the acceleration is AM.
Let k-1 be the time of one frame, Δt. Then, the position PMk and the speed VMk of the moving body in the k frame are obtained, for example, by the following equations (1) and (2).

PMk = PMk−1 + VMk−1 × Δt (1) VMk = VMk−1 + AMk−1 × Δt (2) Note that the moving body operation unit 120 determines the degree of braking effect according to the brake input status of the player. By changing it, the movement calculation processing of the player moving body is performed.

The rotation control unit 130 determines the α degree (0 <α ≦ 18
0) When the theoretical rotation angle per unit frame of an object that looks almost the same when rotated is continuously changed near nα, the actual rotation angle per unit frame is changed discontinuously near nα. By doing so, the actual rotation angle of the object per unit frame is nα
Is performed so as to rotate so as to avoid the vicinity value of.

Next, an example of the characteristic operation of the present embodiment will be described.

FIGS. 3A, 3B and 3C show objects that look almost the same when rotated by 90 degrees. FIG.
3B shows a state in which the object in FIG. 3A is rotated by 90 degrees, and FIG. 3C shows a state in which the object in FIG. 3A is rotated by 180 degrees. I have.

An object which looks almost the same when rotated by 90 degrees is an object which is configured so that each part becomes the same shape when divided into four around the center point. This is the case where the patterns are arranged at predetermined intervals around the center point. Here, a case will be described as an example where a tire is configured with schematic objects as shown in FIGS. 3 (A), 3 (B) and 3 (C).

FIGS. 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. Is shown. Although the tire is traveling to the right, there is a problem that the tire itself appears to be not rotating. This is because the shape after rotation looks the same in spite of the fact that it is rotating, so it does not look like it is rotating.

In the present embodiment, the following processing is performed in order to avoid such a problem and reproduce the rotation of the tire more faithfully according to the theoretical rotation angle.

FIG. 5 is a flowchart for explaining an operation example when a game image including tires is generated in the present embodiment.

In the present embodiment, the following processing is performed for each frame.

First, a theoretical rotation angle ω per frame of the tire is determined from the speed of the moving object (step S10).

Ω ÷ α is calculated from the theoretical rotation angle ω and the division angle α of the tire to obtain an integer part N and a decimal part M (step S20).

If 0 ≦ M <0.25, the rotation angle θ per frame is determined as follows (step S3).
0, S40).

If θ = α {N + 0.25- (0.25-M) / 2} 0.25 ≦ M ≦ 0.75, the rotation angle θ per frame is determined as follows (step) S50, S
60).

Θ = α {N + M} Otherwise (if M> 0.75, the rotation angle θ per frame is determined as follows (step S70).

Θ = α {N + 0.75 + (M−0.75) / 2} Then, the tire is rotated by θ per frame to generate an image (step S80).

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.

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 dashed 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 continuously changes, the actual rotation angle 210 of the tire is changed.
Are multiples of the tire division angle α, α, 2α, 3α
Are discretely changed before and after α, 2α, 3α ‥ so as to avoid the vicinity of ‥. Therefore, the graph 210 showing the change in the actual rotation angle per unit frame is α, 2α,
It is discontinuous near 3α ‥. Also, α, 2α,
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 near 3α ‥,
A graph 210 for calculating an actual rotation angle is generated.

Also, except for the vicinity of α, 2α, 3α ‥, which is a multiple of the tire division angle α, the actual rotation angle 210
Is matched with the theoretical rotation angle, thereby rotating the tire faithfully reflecting the theoretical rotation angle.

By doing so, it is possible to correct the apparent inconvenience caused by the rotation angle per unit frame being equal to a multiple of the tire division angle, and to express the rotation of the tire corresponding to the speed of the racing car. Can be.

FIGS. 7A, 7B and 7C show that 0 ≦ M <0.
It is a figure for explaining rotation of a tire in case of 25. FIG. 7A is a diagram illustrating a state of the tire before rotation, and FIG. 7B is a diagram illustrating a state of the tire when rotated at a theoretical rotation angle. In the case of 0 ≦ M <0.25, the tire does not rotate much because 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. Therefore, in the present embodiment, FIG.
As shown in (C), the actual rotation angle is made larger than the theoretical rotation angle to correct an apparent defect.

FIGS. 8A, 8B, and 8C show M>
It is a figure for explaining rotation of a tire in case of 0.75. FIG. 8A is a diagram illustrating a state of the tire before rotation, and FIG. 8B is a diagram illustrating a state of the tire when rotated at a theoretical rotation angle. When M> 0.75, the tire does not rotate much because 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. Therefore, in the present embodiment, FIG.
As shown in (C), the actual rotation angle is made smaller than the theoretical rotation angle to correct an apparent defect.

Next, an example of a hardware configuration capable of realizing the present embodiment will be described with reference to FIG. In the device shown in the figure, the CPU 1000, the ROM 1002, the RA
M1004, information storage medium 1006, sound generation IC 100
8, image generation IC 1010, I / O port 1012, 1
014 are connected to each other via a system bus 1016 so that data can be transmitted and received therebetween. And the image generation IC1
010 is connected to a display 1018, and the sound generation I
A speaker 1020 is connected to C1008, a control device 1022 is connected to I / O port 1012, and a communication device 1024 is connected to I / O port 1014.

The information storage medium 1006 mainly stores programs, image data for expressing a display object, sound data, and the like. For example, in a home game device, a CD-R is used as an information storage medium for storing a game program and the like.
OMs, game cassettes, DVDs and the like are used. In the arcade game machine, a memory such as a ROM is used. In this case, the information storage medium 1006 is the ROM 1002.

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

The program stored in the information storage medium 1006, the system program (initialization information of the apparatus main body) stored in the ROM 1002, the control apparatus 102
CPU 1000 according to a signal input by
Controls the entire apparatus and performs various data processing. RAM10
Reference numeral 04 denotes storage means used as a work area or the like of the CPU 1000. The information storage medium 1006 and the ROM 10
02, or the calculation result of the CPU 1000 or the like is stored. A data structure having a logical configuration for realizing the present embodiment is constructed on the RAM or the information storage medium.

Further, this type of apparatus includes a sound generation IC 100
8 and an image generating IC 1010 are provided so that a suitable output of game sounds and game images can be performed.
The sound generation IC 1008 includes the information storage medium 1006 and the ROM 1
This is an integrated circuit that generates game sounds such as sound effects and background music based on the information stored in 002, and the generated game sounds are output by the speaker 1020. The image generation IC 1010 includes a RAM 1004,
An integrated circuit that generates pixel information to be output to the display 1018 based on image information sent from the ROM 1002, the information storage medium 1006, and the like. Note that a so-called head-mounted display (HMD) can also be used as the display 1018.

The communication device 1024 exchanges various types of information used inside the game device with the outside. The communication device 1024 is connected to another game device to transmit and receive given information according to the game program. It is used for transmitting and receiving information such as a game program via a communication line.

The various processes described with reference to FIGS. 1 to 8 include an information storage medium 1006 storing a program for performing the processes shown in the flowchart of FIG. 5, a CPU 1000 operating according to the program, and an image generation IC 101.
0, the sound generation IC 1008 and the like. Note that 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, a general-purpose DSP, or the like.

When the present embodiment is applied to an arcade game device as shown in FIG. 1, a system board (circuit board) 1106 built in the device has a CPU,
An image generation IC, a sound generation IC, and the like are mounted. Then, based on at least one of the operation information from the player and the instruction from the computer, information for performing an operation of moving the moving body in the object space and α degrees (0 <α ≦
180) When the theoretical rotation angle per unit frame of an object that looks almost the same when rotated is continuously changed near nα, the actual rotation angle per unit frame is changed discontinuously near nα. By doing so, information for controlling the actual rotation angle per unit frame of the object so as to avoid a value near nα and an image of the object rotated based on the control of the rotation control means are generated. Information and the like are stored in the semiconductor memory 11 as an information storage medium on the system board 1106.
08 is stored. Hereinafter, such information is referred to as stored information. These stored information include a program code for performing the processing of the present invention, image information, sound information, shape information of a display object, table data, list data, player information,
The information includes at least one of information for instructing the process of the present invention, information for performing a process according to the instruction, and the like.

FIG. 10A shows an example in which the present embodiment is applied to a home game machine. The player looks at the game image displayed on the display 1200,
The game controller 1202 and 1204 are operated to enjoy the game. In this case, the storage information is stored in a CD-ROM 1206, memory cards 1208, 1209, etc., which are information storage media detachable from the main unit.

FIG. 10B shows a host device 1300,
A terminal 1304-1 connected to the host device 1300 via a communication line (small network such as LAN or wide area network such as the Internet) 1302.
An example in a case where the present embodiment is applied to a system that includes 〜1304-n. In this case, the storage 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. Terminals 1304-1 to 1304-n are CPs
U, an image generation IC, a sound processing IC, and a game image and a game sound can be generated stand-alone, a game program and the like for generating the game image and the game sound from the host device 1300. Terminal 1304-1
~ 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 and transmits them to the terminals 1304-1 to 1304-1.
4-n and output at the terminal.

In the case of the configuration shown in FIG. 10B, the processing of the present invention is performed in a distributed manner between the host device and the terminal (or, when a server is provided, between the host device, the server and the terminal). It may be. Further, 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.

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, a portable information storage device capable of exchanging information with the arcade game device and exchanging information with the home game device. Equipment (memory card,
It is desirable to use a PDA or a portable game device.

The present invention is not limited to the embodiment described above, and various modifications can be made.

In this embodiment, FIGS. 3A and 3B
Although the description has been made using the example of the tire as shown in (C), the present invention is not limited to this. For example, as shown in FIG. 12, the tire may be divided into six around the center point and composed of six polygons. As described above, when the polygon division is rough, when the polygon division angle and the rotation angle per unit frame match, a problem occurs that the polygon is not visible when rotated. However, according to the present invention, it is possible to avoid the problem according to the present invention. it can.

The present invention is not limited to polygon division, and any problem may occur as long as the main part of the rotating body looks the same when rotated by a predetermined angle. For example, a case may be such that, when rotated by a predetermined rotation angle, the patterns constituting the rotating body appear to match. The pattern may be composed of polygons or the like, or may be composed of textures.

FIG. 11 is a diagram showing a polygon model of a tire. When a tire is configured by a high model having a large number of polygons as shown in the figure, the tire itself is polygon-divided into a shape close to a circle. Therefore, in such a case, the position of the spoke as shown at 310-1 to 310-8 becomes a problem.

In the case shown in FIG. 11, it can be considered that the tire is divided into eight parts by the arrangement of the spokes.
That is, 360/8 = 45 (degrees), and the tire becomes 45 degrees.
It looks almost the same when rotated by degrees or a multiple thereof. For this reason, if the number of rotations per unit frame is equal to 45 degrees or a multiple thereof, there is a problem that the rotations cannot be seen. The present invention includes a case in which such a problem is solved.

In this 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 can be used as long as it is a rotating object, for example, a propeller, a windmill, a water wheel, a ferris wheel, a box for a lottery, and the like.

The present invention is not limited to home and business game machines, but also includes a simulator, a large attraction device in which a large number of players participate, a personal computer,
The present invention can be applied to various game devices such as a multimedia terminal and a system board for generating a game image.

[Brief description of the drawings]

FIG. 1 is a schematic external view of a game device according to the present embodiment.

FIG. 2 is an example of a functional block diagram of the game device according to the present embodiment.

FIGS. 3A, 3B, and 3C show objects that look almost the same when rotated by 90 degrees.

FIGS. 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. Is shown.

FIG. 5 is a flowchart for explaining an operation example at the time of 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 and an actual rotation angle per unit frame in the present embodiment.

FIGS. 7A, 7B, and 7C show 0 ≦ M <0.25.
FIG. 7 is a diagram for explaining rotation of a tire in the case of FIG.

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 that can implement the present embodiment.

FIGS. 10A and 10B are diagrams showing examples of various types of apparatuses to which the present embodiment is applied; FIGS.

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.

[Explanation of symbols]

 Reference Signs List 10 operation unit 12 display unit 14 sound output unit 100 processing unit 110 game calculation unit 120 moving body calculation unit 130 rotation control unit 150 image generation unit 160 sound generation unit 180 storage unit 190 information storage medium 1050 screen 1070 handle 1090 housing 1092 player 1100 Moving object

Continuation of the front page F term (reference) 2C001 AA00 AA09 BA00 BA02 BA05 BB08 BC00 BC01 BC03 BC05 BC10 BD05 CA04 CA05 CB01 CC02 CC08 5B050 AA10 BA08 EA12 EA24 5B080 AA13

Claims (8)

[Claims] 1. A game apparatus for generating an image of a rotating object, wherein the theoretical rotation angle per unit frame of the object which looks almost the same when rotated by α degrees (0 <α ≦ 180) is close to nα. In the case where the actual rotation angle per unit frame changes discontinuously in the vicinity of nα, the actual rotation angle per unit frame of the object is rotated while avoiding a value near nα. A game device comprising: rotation control means for controlling the rotation of the object; and means for generating an image of the object rotated based on the control of the rotation control means. 2. The game according to claim 1, wherein said rotation control means includes means for controlling the rotation of said object based on the theoretical rotation angle when the theoretical rotation angle is not close to nα. apparatus. 3. A game device for generating an image of a rotating object, comprising: rotating an object that looks almost the same when rotated by α degrees (0 <α ≦ 180); Rotation control means for controlling the rotation so that the rotation angle does not take a value near nα, and means for generating an image of the object rotated based on the control of the rotation control means, wherein the rotation control means, Means for calculating a theoretical rotation angle per unit frame of the object, wherein the theoretical rotation angle is nα (n is a natural number, 0 <α ≦ 180)
Means for controlling the rotation of the object based on a value obtained by correcting the theoretical rotation angle in a direction away from nα, and when the theoretical rotation angle is not near nα, Means for controlling the rotation of the object based on the game device. 4. The apparatus according to claim 1, wherein a rotation speed of the object is increased or decreased based on an input state of a player, and the theoretical rotation angle is calculated based on the rotation speed of the object. A game device characterized by the above-mentioned. 5. An information storage medium readable by a computer for controlling a game device that generates an image of a rotating object, and looks almost the same when rotated by α degrees (0 <α ≦ 180). When the theoretical rotation angle per unit frame of the object continuously changes near nα, the actual rotation angle per unit frame is changed discontinuously near nα, so that the A rotation control unit that controls the actual rotation angle so as to avoid a value close to nα; and a unit that generates an image of the object rotated based on the control of the rotation control unit. An information storage medium containing information. 6. The method according to claim 5, wherein the rotation control means includes information necessary for controlling rotation of the object based on the theoretical rotation angle when the theoretical rotation angle is not close to nα. Characteristic information storage medium. 7. A computer-readable information storage medium for controlling a game device that generates an image of a rotating object, and looks almost the same when rotated by α degrees (0 <α ≦ 180). When rotating the object, rotation control means for controlling the rotation so that the rotation angle per unit frame of the object does not take a value near nα, and an image of the object rotated based on the control of the rotation control means Generating means, wherein the rotation control means obtains a theoretical rotation angle per unit frame of the object, and the theoretical rotation angle is nα (n is a natural number, 0 <α ≦ 180)
Means for controlling the rotation of the object based on a value obtained by correcting the theoretical rotation angle in a direction away from nα, and when the theoretical rotation angle is not near nα, Means for controlling the rotation of the object based on the information storage medium. 8. The apparatus according to claim 5, wherein a rotation speed of the object is increased or decreased based on an input state of a player, and the theoretical rotation angle is calculated based on the rotation speed of the object. An information storage medium characterized by containing information necessary for the information storage.