JP6267295B1 - Game program and game system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a game program and a game system capable of preventing a predetermined part of a character from floating from a predetermined object or the ground during the movement of the character. A computer functions as a virtual space generation unit and a character motion control unit, and the character motion control unit performs a contact operation for maintaining a state where a predetermined part of the character is in contact with a predetermined object or the ground. Contact operation execution means for performing the operation, and the contact operation execution means is configured to fix a predetermined first joint of at least three joints and move the other joints in a state where the other joints are movable. The first calculation to determine is executed, it is determined whether or not the angle of a predetermined second joint among other joints is equal to or greater than a predetermined angle, and the angle of the second joint is equal to or greater than a predetermined angle In this case, the first joint is movable while the second joint is fixed, and the position and posture of a joint other than the second joint among the first joint and the other joints are determined. [Selection] Figure 4

Description

  The present invention relates to a game program and a game system.

  2. Description of the Related Art Conventionally, there are games such as an action game or a role playing game that cause a player character to move in a three-dimensional virtual space in response to a user operation. In such a game, various non-player characters such as enemy characters appear, and the player character proceeds by subjugating the enemy character. The actions of the player character and the non-player character are realized by determining the position and posture (angle) of each joint of a joint model having a plurality of joints (see, for example, Patent Document 1).

JP 2014-61420 A

  In such a conventional game, when a character changes the body direction or performs an action that causes the body to be pulled up with the foot on the ground, the foot should not be lifted off the ground. It was difficult and sometimes looked unnatural. Such a problem can occur not only when the foot and the ground are in contact with each other, but also when the character is operated while maintaining a state where a predetermined part such as the character's hand is in contact with a predetermined object or the ground.

  Accordingly, an object of the present invention is to provide a game program and a game system that can prevent a predetermined part of a character from floating from a predetermined object or the ground during the movement of the character.

  A game program according to one aspect of the present invention includes a computer, a virtual space generation unit that generates a three-dimensional virtual space in which a three-dimensional character operates, and a joint having a plurality of joints set corresponding to the character By determining the position and posture of each joint of the model, it is made to function as a character action control means for controlling the action of the character, and the character action control means is a predetermined part of the character during the predetermined action of the character. Includes a contact operation executing means for performing a contact operation for maintaining a state in contact with a predetermined object or the ground, and the contact operation executing means fixes a predetermined first joint of the at least three joints. In the first stage, the first calculation is performed to determine the position and posture of the other joint while the other joint is movable. An execution unit; an angle determination unit that determines whether or not an angle of a predetermined second joint among the other joints is equal to or greater than a predetermined angle as a result of the first calculation; and an angle of the second joint When the angle becomes equal to or greater than the predetermined angle, the first joint is movable while the second joint is fixed, and the joints other than the second joint among the first joint and the other joints Second calculation execution means for executing a second calculation for determining the position and orientation.

  The first joint may be a joint located at a tip of the at least three joints, and the second joint may be a joint adjacent to the first joint.

  The at least three joints may be joints of the character's legs.

  The contact operation executing means may determine the position and posture of a joint in a movable state, starting from the predetermined object or a position in contact with the ground at the predetermined part.

  A game system according to another aspect of the present invention includes a program storage unit that stores the game program, and a computer that executes the program stored in the program storage unit.

  According to the present invention, it is possible to prevent a predetermined part of a character from floating from a predetermined object or the ground during the movement of the character.

It is a block diagram which shows the hardware constitutions of the game device in this Embodiment. It is a block diagram which shows the functional structure of the game device shown in FIG. It is a figure for illustrating a joint model in this embodiment. It is a figure which shows the specific example of the contact action of the player character in this Embodiment. It is a flowchart which shows the flow of the contact operation execution process in this Embodiment. It is a figure which shows the operation example of the player character in a comparative example.

  Hereinafter, a game program and a game system according to embodiments of the present invention will be described with reference to the drawings.

[Game Overview]
In the following description, an action game executed in a home game device will be described as an example. In the action game according to the present embodiment, a three-dimensional virtual space is generated, and the user operates the player character acting in the virtual space to annihilate the enemy character, or at a predetermined position in the game space. In order to achieve a predetermined goal such as reaching, the player proceeds by fighting against the enemy character.

[Hardware configuration]
A configuration of a game device that realizes the above-described game will be described. The game system according to the present embodiment includes the following game device 2 and external devices such as a monitor (display unit) 19, a speaker 22, and a controller (operation unit) 24 connected to the game device 2. A game can be played based on the game program 30a and the game data 30b read from the type storage medium 30. However, in the following, in order to simplify the description, the game device 2 may be simply referred to.

  FIG. 1 is a block diagram showing a hardware configuration of game device 2 in the present embodiment. As shown in FIG. 1, the game apparatus 2 can communicate with another game apparatus 2 and the server apparatus 3 via a communication network NW such as the Internet or a LAN. The game apparatus 2 includes a CPU 10 that is a computer for controlling the operation thereof, and a disk drive 12, a memory card slot 13, an HDD 14 that constitutes a program storage unit, a ROM 15, and a RAM 16 are connected to the CPU 10 via a bus 11. Yes.

  Further, the graphic processing unit 17, the audio synthesis unit 20, the wireless communication control unit 23, and the network interface 25 are connected to the CPU 10 via the bus 11.

  Among these, the graphic processing unit 17 draws a game image including a game space and each character in accordance with an instruction from the CPU 10. An external monitor 19 is connected to the graphic processing unit 17 via a video conversion unit 18, and the game image drawn by the graphic processing unit 17 is converted into a moving image format by the video conversion unit 18, and the monitor 19 Is displayed.

  The audio synthesizing unit 20 reproduces and synthesizes digital game sound in accordance with instructions from the CPU 10. An external speaker 22 is connected to the audio synthesis unit 20 via an audio conversion unit 21. Therefore, the game sound reproduced and synthesized by the audio synthesizing unit 20 is decoded into an analog format by the audio converting unit 21 and further outputted from the speaker 22 to the outside.

  Furthermore, the audio synthesizing unit 20 converts the user's voice or the like input from the microphone 26 provided in the headset or the controller 24 connected to the game apparatus 2 into the digital format by the audio converting unit 21. It can be acquired. The audio synthesizing unit 20 can transmit the acquired data to the CPU 10 as input information.

  The wireless communication control unit 23 includes a 2.4 GHz band wireless communication module, and is wirelessly connected to the controller 24 attached to the game apparatus 2 so that data can be transmitted and received. The user can input a signal to the game apparatus 2 by operating an operator (described later) such as a button provided on the controller 24, and can control the movement of the player character displayed on the monitor 19. It has become. The network interface 25 connects the game apparatus 2 to a communication network NW such as the Internet or a LAN, and can communicate with another game apparatus 2 or the server apparatus 3. Then, by connecting the game apparatus 2 to another game apparatus 2 via the communication network NW and transmitting / receiving data to / from each other, a plurality of player characters can be displayed synchronously in the same game space. Thereby, in this game, multiplayer is possible in which a plurality of player characters corresponding to a plurality of users cooperate with each other to fight against enemy characters, or a plurality of users battle against each other.

[Functional configuration of game device]
FIG. 2 is a block diagram showing a functional configuration of the game apparatus 2 shown in FIG. As shown in FIG. 1, the game apparatus 2 includes a control unit 4 including a CPU 10, an HDD 14, a ROM 15, a RAM 16, a graphic processing unit 17, a video conversion unit 18, an audio synthesis unit 20, an audio conversion unit 21, a network interface 25, and the like. Act as a computer. Then, as shown in FIG. 2, the control unit 4 of the game apparatus 2 executes the game program 30a of the present invention, so that the virtual space generation means 41, the object placement means 42, the character motion control means 43, etc. Demonstrate the function. The character action control means 43 includes a contact action execution means 44. Further, the contact operation execution means 44 includes a first calculation execution means 45, an angle determination means 46, and a second calculation execution means 47.

  Among these, the virtual space generation means 41 generates a three-dimensional virtual space. The virtual space becomes a game space in which the player character operated by the user acts. In addition, the object placement unit 42 places various objects in the virtual space. For example, the object placement unit 42 reads data such as objects included in the game data 30b as the player character moves, and places the data in the virtual space. The object placement means 42 also places non-player characters such as player characters and enemy characters in the virtual space.

  The character motion control means 43 controls the motion of the character by determining the position and posture of each joint of a joint model having a plurality of joints set corresponding to the character. The character action control means 43 controls various actions of the player character according to the operation of the controller 24 by the user, for example. Furthermore, the character action control means 43 controls, for example, the actions of the enemy character and the non-player character that is not the enemy character (such as a character attacking the enemy character together and a character such as a villager who is neither a friend nor an enemy). .

  FIG. 3 is a diagram for illustrating a joint model in the present embodiment. FIG. 3 illustrates the player character P. The player character P shown in FIG. 3 is configured as a character imitating a human being. That is, the player character P includes a plurality of parts having a head 100, a neck 101, a chest 102, a waist 103, an arm 104, a leg 105, and the like. The joint model M has a plurality of joints J (including J0, J1 to J3) associated with each of these parts, and a bone B connecting two predetermined joints JJ. . The body surface of each part of the player character P is composed of a combination of many polygons, and the vertexes of each polygon are associated with one or a plurality of joints J. The action of the player character P is performed by moving the joint J (changing the position) and / or rotating the joint J by a predetermined angle (changing the posture). As the position or posture of the joint J changes, the polygons associated with the joint J are deformed in conjunction with each other, and various actions of the player character P are realized.

  Normally, the character motion control means 43 generates a motion based on a joint (in the example of FIG. 3, the hip joint J0) located at the center of the body based on predetermined motion data. The contact operation based on the result of the first calculation described later is generated starting from the hip joint J0. Specifically, when the character motion control means 43 performs a motion of moving a predetermined part (for example, a motion of twisting the waist portion 103 while maintaining the state where the foot F is grounded), first, the hip joint J0. Next, the positions and postures of the joints connected to the joint J0 via the bone B, that is, the joints of the chest 102 and the joints J3, J2, and J1 of the leg 105 are determined. Thereafter, the position and posture of the joint of the arm 104 connected to the joint J of the chest 102 via the bone B are determined.

  That is, the character motion control means 43 determines the position and posture of the joint (child joint) of the distal side portion in order from the joint (parent joint) of the central portion (base end side portion) of the player character P. The whole body movement of the player character P is determined. For example, the character motion control means 43 determines the position and posture of each joint J based on forward kinematics (FK).

  In the present embodiment and claims, `` determine the position and posture of the joint '' means that the coordinates of the joint and the angle from the predetermined position of the joint are changed as parameters, A state in which any of the position and posture of the joint does not change before and after the movement may be included.

  Further, the character motion control means 43 determines the position and posture of the joint of the central part in order from the joint of the front side part (for example, hand, foot, etc.) of the player character P, thereby Can also be determined. For example, the character motion control means 43 can determine the position and posture of each joint J based on inverse kinematics (IK). That is, in the case of IK, the relationship between the parent joint and the child joint is opposite to that of FK.

  Further, the joint model M includes a reference position JN for controlling the movement of the player character P. The reference position JN is configured to determine the moving direction of the player character P. For example, at the reference position JN, the moving direction of the player character P is set in a direction perpendicular to the normal line of the moving plane (direction along the moving plane). The reference position JN is associated with each joint J of the joint model M. In general, the reference position JN is referred to as a NULL part or the like. In the present embodiment, the reference position JN is set to a position immediately below the hip joint J0 and in contact with the moving plane when the player character P is standing or moving on the horizontal plane. The reference position JN is a reference for the position coordinates of the player character P. For example, the position coordinates of the player character P coincide with the reference position JN. The reference position JN is not displayed on the game screen.

[Specific example of character motion control]
FIG. 4 is a diagram illustrating a specific example of the contact action of the player character in the present embodiment. Moreover, FIG. 6 is a figure which shows the operation example of the player character in a comparative example. 4 and 6 show the operation of the leg 105 when the hip joint J0 is moved upward by the operation of twisting the waist 103 while maintaining the state where the foot is in contact with the ground Q. 4 and 6 show only the hip joint J0 and the joints J1 to J3 of the one leg 105 and the bones B0 to B3 connecting them. 4 and 6, the left diagram shows before operation, and the right diagram shows after operation.

  First, in the comparative example of FIG. 6, the position of the hip joint J0 is separated from the ground Q by the twisting action of the upper body (not shown) with the foot F in contact with the ground Q (the hip joint position J0 ′). ), The positions and postures of the knee joint J2 and the hip joint J3 are calculated so that the foot F does not leave the ground Q. Conventionally, when the position and posture of each joint of the leg 105 is determined by IK starting from the contact point T of the foot F, the ankle joint J1 is fixed to avoid many solutions. The positions and postures of the knee joint J2 and the hip joint J3 are calculated. That is, when determining the position and posture of each joint, the knee joint J2 and the hip joint J3 are set to be movable, and the ankle joint J1 is set to be fixed. (In FIG. 6, the angle of the joint set to be movable is displayed as an arc with arrows at both ends, and the angle of the joint set to be fixed is displayed as a double arc (the same applies to FIG. 4). .

  In this case, when the distance between the ground Q and the hip joint J0 is equal to or longer than a predetermined length, the foot F is separated from the ground Q even when both the joints J2 and J3 are fully extended, and a gap X is generated. End up. Even when the gap X does not occur, the state in which both the joints J2 and J3 extend more than necessary is unnatural as the movement of the player character P.

  Therefore, in the present embodiment, the contact operation execution unit 44 executes the functions of the first calculation execution unit 45, the angle determination unit 46, and the second calculation execution unit 47.

  FIG. 5 is a flowchart showing the flow of the contact operation execution process in the present embodiment. First, the angle determination means 46 is the angle of the ankle joint J1, which is the first joint located at the tip of the three joints J1 to J3 constituting the leg 105 (the bones B1 and B2 connected to the ankle joint J1). It is determined whether or not (angle formed) θ1 is equal to or larger than a predetermined angle θ1th (step S1).

  When the angle θ1 of the ankle joint J1 is less than the predetermined angle θ1th (No in step S1), the first calculation execution unit 45 fixes the ankle joint J1 and the other joint J2 of the three joints J1 to J3. , J3 is set to be movable (step S2). Further, the first calculation execution means 45 executes a first calculation for determining the positions and postures of the joints J2 and J3 (step S3). The first calculation determines the positions and postures of the knee joint J2 and the hip joint J3 that are in a movable state, starting from the contact point of the foot F with the ground Q. That is, the first calculation execution unit 45 determines the positions and postures of the knee joint J2 and the hip joint J3 based on IK.

  Here, as a result of the first calculation, the angle determination means 46 determines that the angle of the knee joint J2 that is the second joint adjacent to the ankle joint J1 (located on the proximal side) (the bone B2 connected to the knee joint J2). , B3) θ2 is determined whether it is equal to or larger than a predetermined angle θ2th (step S4).

  When the angle θ2 of the knee joint J2 is equal to or greater than the predetermined angle θ2th (Yes in step S4), the second calculation execution unit 47 fixes the knee joint J2 and sets the ankle joint J1 and the hip joint J3 to be movable (step). S5). Further, the second calculation execution means 47 executes a second calculation for determining the positions and postures of the ankle joint J1 and the hip joint J3 (step S6). Similar to the first calculation, the second calculation determines the positions and postures of the ankle joint J1 and the hip joint J3 that are in a movable state starting from the contact point T of the foot F with the ground Q. That is, the second calculation execution unit 47 determines the positions and postures of the ankle joint J1 and the hip joint J3 based on IK.

  When the angle θ2 of the knee joint J2 is equal to or larger than the predetermined angle θ2th in the result of the first calculation, the contact operation executing unit 44 executes the contact operation of the leg 105 based on the result of the second calculation. (Step S7). Further, when the angle θ2 of the knee joint J2 is less than the predetermined angle θ2th in the result of the first calculation (No in step S4), the contact operation executing unit 44 determines the leg portion based on the result of the first calculation. A contact operation 105 is executed (step S7). Once the contact operation of the leg 105 is executed based on the result of the second calculation, the second calculation is continuously performed until the angle θ1 of the ankle joint J1 becomes less than the predetermined angle θ1th. When the angle θ1 of the ankle joint J1 is equal to or greater than the predetermined angle θ1th, the first calculation is performed again. In order to realize this, the determination process of step S1 is performed.

  In the second calculation, when the angle θ1 of the ankle joint J1 is equal to or larger than the maximum angle θ1M (> θ1th), the second calculation execution unit 47 starts from the contact point T with the ground Q on the foot F. For example, the positions and postures of the joints may be determined based on FK, for example, as an operation for stopping the determination of the positions and postures of the ankle joint J1 and the hip joint J3 and causing the foot F to float from the ground Q. It is possible to prevent the player character P from standing on the toe in an operation in which the state in which the player character P is excessively standing on the toe is unnatural.

  According to the above aspect, even if the player character P is in a state where the hip joint J0 is pulled up in an action such as twisting the body, the foot is maintained while the knee joint J2 is bent appropriately. The state where the part F is in contact with the ground Q can be maintained. Therefore, the operation | movement which maintains the state which the foot | leg part F contact | abutted on the ground Q can be expressed more naturally. Further, the position and posture of each joint in which the leg portion 105 is movable are determined from the contact point T as a starting point. Thereby, it is not necessary to individually set the position and posture of each joint of the leg portion 105 in advance regardless of the direction and degree of change of the hip joint J0. Therefore, maintaining the state in which the foot F is in contact with the ground Q with respect to various actions of the player character P can be easily realized while suppressing an increase in the amount of data.

[Modification]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various improvements, changes, and modifications can be made without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the contact action in the player character P has been described. However, the present invention can be applied to a contact action in a non-player character such as an enemy character.

  In the above embodiment, the first joint to be fixed in the first calculation is the ankle joint J1, but the first joint is a joint other than the ankle joint J1 (positioned at the tip of the three consecutive joints). Other joints). In the above embodiment, the second joint to be fixed in the second calculation is the knee joint J2, but the second joint may be a joint other than the knee joint J2. For example, the first joint may be the knee joint J2, and the second joint may be the ankle joint J1. Further, there may be a plurality of joints by which the angle determination means 46 determines the angle. For example, the angle determination means 46 determines whether or not the angles θ2 and θ3 of the knee joint J2 and the hip joint J3 are equal to or larger than predetermined angles θ2th and θ3th, respectively. The joint to be operated may be fixed.

  Further, the present invention can also be applied to a case where the character's feet are in direct contact with the ground via the character's equipment (for example, stilts, walking robot) or the like.

  Moreover, in the said embodiment, although contact operation | movement which maintains the state which the leg | foot part F of the leg part 105 contact | abuts the ground Q was demonstrated, it is not restricted to this. For example, when the character is standing upside down, the contact operation execution processing in the above-described embodiment can be applied to a contact operation that maintains the state in which the hand of the arm unit 104 is in contact with the ground Q. In addition, for example, the contact operation execution processing in the above-described embodiment can be applied to a contact operation that maintains a state in which a part such as a hand of the arm unit 104 contacts an object such as a wall. In these cases, the first joint is a wrist joint, the second joint is an elbow joint, and the third joint is a shoulder joint. In addition, with respect to the movement operation of a four-legged animal, the contact operation execution process in the above embodiment may be performed on the movement of the limb of the animal. In this case, the first joint is a wrist joint and an ankle joint, the second joint is an elbow joint and a knee joint, and the third joint is a shoulder joint and a hip joint.

  In the above embodiment, the plurality of joints J included in the joint model M may imitate human joints, or may have more or fewer joints such as monsters. That is, the characters to which the above motion can be applied include not only human characters but also various monsters.

  Moreover, although the action game was illustrated in the said embodiment, the said operation | movement aspect about a three-dimensional character is applied to various games using a three-dimensional virtual space, such as a role playing game, a simulation game, or a shooting game. Is possible.

  Further, although the stationary game apparatus has been described in the above embodiment, the present invention can also be suitably applied to computers such as portable game apparatuses, mobile phones, and personal computers.

  The present invention is useful for preventing a predetermined part of a character from floating from a predetermined object or the ground during the movement of the character.

2 Game device 30a Game program 30b Game data 41 Virtual space generation means 43 Character movement control means 44 Contact movement execution means 45 First calculation execution means 46 Angle determination means 47 Second calculation execution means J joint J0 waist joint J1 ankle joint J2 Knee joint J3 Hip joint M Joint model P Player character Q Ground T Contact location

Claims (5)

Computer
By determining the position and posture of each joint of a joint model having a plurality of joints set corresponding to the character, virtual space generation means for generating a three-dimensional virtual space in which the three-dimensional character operates, Function as character action control means for controlling the action of the character,
The character action control means includes a contact action executing means for performing a contact action for maintaining a state in which the predetermined part of the character is in contact with a predetermined object or the ground during the predetermined action of the character,
The predetermined part is a part located ahead of a joint located at a tip of at least three joints continuously arranged in the character;
The contact operation execution means includes
First calculation execution means for executing a first calculation for determining the position and posture of the other joint in a state where the predetermined first joint of the at least three joints is fixed and the other joint is movable. When,
An angle determination means for determining whether or not an angle of a predetermined second joint among the other joints is equal to or greater than a predetermined angle as a result of the first calculation;
When the angle of the second joint is equal to or greater than the predetermined angle, the first joint is movable while the second joint is fixed, and the first joint and the other joints are And a second calculation execution means for executing a second calculation for determining positions and postures of joints other than the two joints. The first joint is a joint located at a tip of the at least three joints;
The game program according to claim 1, wherein the second joint is a joint adjacent to the first joint.   The game program according to claim 2, wherein the at least three joints are joints of the legs of the character.   The contact operation execution means determines the position and posture of a joint in a movable state, starting from the predetermined object or a location in contact with the ground at the predetermined portion. Game program. A program storage unit storing the game program according to any one of claims 1 to 4,
A game system comprising: a computer that executes a program stored in the program storage unit.

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