TWI603768B - Game system, control method and program - Google Patents

Description

Game system, control method and program

The present invention relates to a game system, a control method, and a program for striking an object moving in a three-dimensional virtual space and changing its orientation.

The prior art proposes a baseball game for manipulating a ball object from a pitcher character by moving an operation map displayed in a different area from a hitting cursor on the screen (a cursor for providing an indication of the bat hitting the ball object) In order to move the linked hitting cursor, the ball object can be slammed by the thumb of the player's character by leaving the thumb touching the game screen at the time of reaching the vicinity of the barrier (refer to Patent Documents 1 and 2). .

Further, Patent Document 1 describes that the user operates both the moving operation of the hitting cursor and the striking operation of the bat swing while holding the smart phone with one hand.

[Previous Technical Literature]

[Patent Literature]

[Patent Document 1] Japanese Patent No. 5248705

[Patent Document 2] Japanese Patent Laid-Open No. 2015-131041

The baseball game described in the above-mentioned Patent Documents 1 and 2 is a striking operation in which a thumb of a moving operation of a hitting cursor is moved away from the screen to perform a bat swing, and thus the moving operation of the hitting cursor and the striking operation of the bat swing are performed. Set into a series of processes, and there are restrictions on the freedom of operation.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a game system, a control method, and a program for preventing interference between two operations while ensuring a punching operation of an object and a degree of freedom of a hitting cursor.

The basic method for solving the above problems of the present invention relates to a game system, which is a game system for striking an object moving in a three-dimensional virtual space and changing a moving direction, comprising: a hitting cursor moving unit, corresponding to a user operation, and a mobile display a hitting cursor at an indicated position striking the object; the object position determining unit determines whether the object falls within a predetermined range from a position at which the object is struck, and the object falls into the object by striking the object And generating an output in a case where the position is within a predetermined range; and a hitting cursor movement restricting unit that receives an output of the object position determining unit and at least partially limits an action of the hitting cursor moving unit, wherein the position of the object is switched The first mode for restricting the movement of the hitting cursor and the second mode for restricting the movement of the hitting cursor at least partially prevent interference between the striking operation of the ball and the moving operation of the hitting cursor.

According to the present invention, it is possible to prevent interference between the two operations while ensuring the freedom of the striking operation of the object moving in the three-dimensional virtual space and the moving operation of the hitting cursor.

1‧‧‧Game system

2‧‧‧Ball Cursor Mobile Unit

3‧‧‧Ball Cursor Movement Restriction Unit

4‧‧‧Object position judgment unit

20‧‧‧Server

21‧‧‧ Game Server

22‧‧‧Database Server

30‧‧‧User terminal

40‧‧‧Network

110, 310‧‧‧ CPU

120, 320‧‧‧ROM

130, 330‧‧‧RAM

140, 390‧‧‧Auxiliary storage device

150, 410‧‧‧Communication Control Department

150a, 410a‧‧‧ communication interface

160‧‧‧Input and Output Control Department

160a‧‧‧Input and output interface

170, 420‧‧ ‧ busbar line

340‧‧‧Image Processing Department

350‧‧‧ Display Department

360‧‧‧Sound Processing Department

370‧‧‧Sound Input Department

380‧‧‧Sound Output Department

400‧‧‧Operation Input Department

600‧‧‧ game screen

602‧‧‧ hitter role

603‧‧‧Player role

604, 610‧‧‧ mark

605‧‧‧Ball

606‧‧‧Home Plate

607‧‧‧ bat

608‧‧‧ ball

609‧‧‧Ball cursor

S101~S109‧‧‧Steps

1 is a block diagram showing the composition of a system according to an embodiment of the present invention; FIG. 2A is a block diagram showing a hardware composition according to an embodiment of the present invention; and FIG. 2B is a diagram showing a server according to an embodiment of the present invention. FIG. 3 is a block diagram showing an example of a hardware composition of a server according to an embodiment of the present invention; and FIG. 4 is a block diagram showing an example of a hardware composition of a user terminal according to an embodiment of the present invention; 5 is a flow chart showing an operation mode according to an embodiment of the present invention; FIG. 6A is a diagram showing an example of a game screen before a pitcher's pitching operation; FIG. 6B is a view showing a pitching action by a pitcher character. a pattern of an example of a game screen before the ball falls within a predetermined range of the strike position; 6C is a diagram showing an example of a game screen in which the ball falls within a predetermined range of the striking position after the pitching operation of the pitcher character; FIG. 6D is a schematic diagram showing an example of a game screen when the ball is struck. .

An outline of an embodiment of the present invention is exemplarily enumerated below.

[Scenario 1]

A game system, which is a game system for striking an object moving in a three-dimensional virtual space and changing a moving direction, comprising: a hitting cursor moving unit, corresponding to an operation of the user, moving the display position indicating the striking of the object a hitting cursor; an object position judging unit that judges whether or not the object falls within a predetermined range from a position at which the object is struck, and is generated in a case where the object falls within a predetermined range from a position at which the object is struck And a hitting cursor movement restricting unit that receives an output of the object position determining unit and at least partially limits an action of the hitting cursor moving unit, wherein, corresponding to the position of the object, switching the movement that does not restrict the movement of the hitting cursor The 1 mode and the second mode in which at least a part of the movement of the hitting cursor is restricted, can cause no interference between the striking operation of the ball and the moving operation of the hitting cursor.

According to the first aspect, in the second mode, by at least a part of restricting the movement of the hitting cursor, the two operation rooms can be prevented while ensuring the punching operation of the object moving in the three-dimensional virtual space and the degree of freedom of the hitting cursor. Interference.

[Surface 2]

In the game system described in Aspect 1, the predetermined range is defined by the distance.

[Surface 3]

In the game system described in the aspect 1 or the aspect 2, in the second mode, the moving operation of the hitting cursor is allowed to proceed in a direction different from the direction in which the striking operation of the object is different.

[Surface 4]

The game system according to any one of the aspects 1 to 3, wherein the striking operation of the object is performed at an arbitrary position.

According to the present aspect 4, the striking operation of the object can be performed at the moment when the operation position is not particularly required, and the degree of freedom of operation can be increased while also improving the operability.

[Surface 5]

The game system according to any one of the aspects 1 to 4, wherein the movement trajectory of the object is calculated based on at least the striking operation direction of the user.

According to this aspect 5, the moving direction of the object can be simply idealized.

[Figure 6]

The game system according to any one of the aspects 1 to 5, wherein the operation of the hitting cursor can be completed at a position that does not hinder the display of the hitting cursor and the object.

According to this aspect 6, it is possible to prevent the display of the hitting cursor and the object from being hindered by the moving operation of the hitting cursor.

[Stage 7]

The game system according to aspect 6, wherein the moving operation of the hitting cursor is completed in an area adjacent to the hitting cursor.

According to this aspect 7, the hitting cursor movement operation position can be idealized.

[Surface 8]

The game system of any of the aspects 1 to 7, wherein the game system generates an animation linked to the position of the object.

According to this aspect 8, the authenticity of the game can be increased.

[Surface 9]

The game system according to any one of the aspects 1 to 8, wherein the game is a baseball game, the object is a baseball ball, and the baseball ball is hit by a hitting action of a character in the three-dimensional virtual space. Strike.

According to the aspect 9, a preferred embodiment of the baseball game can be realized.

Other embodiments of the present invention are directed to a control method having substantially the same content as each of the above-described systems, and a program for realizing the method by a computer.

Therefore, even in the aforementioned methods and programs, the same effects as the system are produced.

Hereinafter, an embodiment related to the present invention will be described in detail based on the drawings. Further, the present invention should not be limited by the embodiments described below, and should be construed based on the description of the scope of the patent application. In addition, other similar embodiments may be utilized by those skilled in the art; in addition, it should be noted that changes or additions of suitable forms may be made without departing from the spirit of the invention.

[summary of system composition]

1 is a block diagram showing the composition of a game system according to an embodiment of the present invention. The game system 1 includes a hitting cursor moving unit 2, a hitting cursor restricting unit 3, and an object position determining unit 4. Details of the functions of the respective constituent elements 2 to 4 of the game system 1 will be described in detail below.

[Summary of the hardware composition of the system]

Fig. 2A is a conceptual diagram showing an outline of a basic hardware composition according to an embodiment of the present invention. The hardware component includes a server 20, a network 40, and a user terminal 30 for each user that can communicate with the server 20 via the network 40.

The server 20 is composed of, for example, the game server 21 and the database server 22 as shown in FIG. 2B.

The game server 21 receives the access from the user terminal 30 of each user receiving the game service through the network 40, manages the game information record of each user, and provides a game to each user through the network 40. service.

The database server 22 is a server for recording and managing information such as the game history and the number of points obtained for each user.

Furthermore, although the server 20 is illustrated as being composed of the game server 21 and the database server 22, the present invention is not limited thereto. For example, it may be configured to disperse various functions of each server in a plurality of servers. Further, a verification server for performing verification of the user and a payment management server for performing payment management when the user purchases an item of the payment object in the game may be separately configured.

In addition, in the case where it is necessary to establish a server system that can withstand excessive access from a majority of users using game services, a plurality of game servers 21 and database servos can also be provided. The device 22 and the like constitute a load-distributed system. In this case, a load balancer for adjusting the load between the plurality of game servers 21 and the database server 22 or the like is preferably provided.

The network 40 is not limited to wired/wireless as long as it is a communication network including a dedicated line (dedicated cable) and an Ethernet (registered trademark) LAN, a telephone communication network, and a cable network.

Furthermore, the games provided can be social network games provided on the SNS platform, and games built independently of the SNS platform. The game offered can be a variety of game forms and types of ball games such as baseball, football, tennis, billiards and cricket.

In the following description, the provided game is a community game provided on the SNS platform, and the program for the web page (application software) is installed on the game server, and the game server corresponds to the input operation of the user terminal 30 of each user. Perform calculations and data processing for the game. In this example, the game server transmits the webpage information (game screen material) to each user while updating the game information of each user stored in the database server as the game progresses. Terminal 30.

A web browser having a website reading function is installed in the user terminal 30 of each user, and the web page information transmitted by the game server can be displayed on the screen of the user terminal 30. The user terminal 30 can be, for example, a mobile phone terminal, a PHS (Personal Handy-phone System) terminal, a mobile information assistant (PDA: Personal Digital Assistant), a smart phone, a personal computer, or Various terminals such as tablet computers.

[Composition of game server, etc.]

An example of the specific composition of the game server will be described below based on FIG. As shown in the figure, the game server mainly includes a CPU (Central Processing Unit) 110, a ROM (Read Only Memory) 120, and a RAM (Random Access Memory) 130. The main memory device, the auxiliary storage device 140, the communication control unit 150, and the input/output control unit 160 are connected to each other via a bus bar line 170 including an address bus, a data bus, and a control bus. Further, a case where an appropriate interface circuit (not shown) is disposed between the bus bar line 170 and each constituent element may be employed.

The CPU 110 performs overall control of the game server. The ROM 120 stores necessary programs and the like for controlling the operation of the game server. The RAM 130 also provides a work area corresponding to the CPU 110 while storing various programs and materials.

The auxiliary storage device 140 stores an application software such as a game program, various materials, and the like, and is, for example, a storage device of a hard disk drive. The program for launching the game server is also stored in the auxiliary storage device 140, which is loaded from the auxiliary storage device 140 to the RAM 130 through the bus bar line 170 when the game server is started.

The communication control unit 150 has a communication interface 150a connected to the network 40 to control communication between the user terminals 30 of each user through the network 40. Further, in the case where the game is a community game provided on the SNS platform, the communication control unit 150 controls communication between the SNS servers (not shown).

The input/output control unit 160 is communicably connected to the database server, and the CPU 110 performs input/output control when reading and writing data (recording) to the database server.

The database server is a storage device having an area for storing game information for each user, for example, a large-capacity hard disk device including RAID (Redundant Arrays of Inexpensive Disks). The database server can establish various game information (user name, level, number of points in the game, and items held by the user, etc.) based on uniquely identifying the identification information (user ID) of each user. Associated database, object database or object relationship database.

Next, the composition of the user terminal 30 of the user who accesses and accepts the provision of the game service by the game server according to the embodiment of the present invention will be described.

[Configuration of terminal device]

Taking the mobile terminal as the user terminal 30 as an example, the composition thereof will be described based on FIG. As shown in FIG. 4, the user terminal 30 mainly includes a CPU 310, a ROM 320 and a RAM 330 as main storage devices, an image processing unit 340, a display unit 350, a sound effect processing unit 360, an audio input unit 370, and an audio output unit 380. The auxiliary storage device 390, the operation input unit 400, and the communication control unit 410 form the components 310 to 340, 360, and 390 to 410 connected to each other via the bus bar line 420. Further, a interface circuit (not shown) is appropriately arranged between the bus bar circuit 420 and each constituent element.

The CPU 310 performs overall control of the user terminal 30. A necessary program or the like for controlling the operation of the user terminal 30 is stored in the ROM 320. In addition, the RAM 330 stores various programs and materials loaded by the ROM 320 or the auxiliary storage device 390, and provides a work area corresponding to the CPU 310. A browser that displays game screen material described in the manner of HTML or the like is stored in the ROM 320 or the auxiliary storage device 390, and is loaded into the RAM 330 and executed by the CPU 310. In addition, various plug-in software for expanding the browser function of the web browser can also be stored in the ROM 320 or the auxiliary storage device 390 together with the web browser.

The image processing unit 340 drives the display unit 350 based on the image display command from the CPU 310 to display an image on the screen of the display unit 350. The display unit 350 can employ various display devices such as a liquid crystal display.

When the sound from the sound input unit 370 is input, the sound effect processing unit 360 converts the analog sound signal into a digital sound signal, and generates an analog sound signal based on the sounding command from the CPU 310 and outputs it to the sound output unit 380. The voice input unit 370 is a microphone built in the user terminal 30, and is used in the case of telephone communication and recording or the like. The sound output unit 380 is a speaker that is used for telephone communication, and a speaker that outputs a telephone call sound and an effect sound when the game is executed.

The auxiliary storage device 390 stores storage devices such as various programs and materials. The auxiliary storage device 390 is exemplified by an internal memory of the mobile phone terminal, and a flash memory or the like can be used. Further, the external memory of the mobile phone terminal can use, for example, a memory card to read the writer.

The operation input unit 400 receives an operation input from the user, and then outputs an input signal corresponding to the operation input to the CPU 310 via the bus bar line 420. An example of the operation input unit 400 is a physical button such as a direction command button, a decision button, and an input button such as an alphanumeric character provided on the main body of the user terminal 30. Furthermore, in the case where the display unit 350 is composed of a touch screen, the touch screen is regarded as the operation input unit 400.

The communication control unit 410 has a communication interface 410a, and has a communication control function for data communication during game operation and a communication control function for transmitting and receiving sound data at the mobile phone terminal. Here, the communication control function for data communication includes, for example, a wireless LAN connection function, a network connection function of a wireless LAN and a mobile phone transmission network, and a short-range wireless communication function. The communication control section 410 issues a connection for connecting the user terminal 30 to the infinite based on an instruction from the CPU 310. The connection signal of the LAN and the network also accepts the information sent by the communication object and supplies it to the CPU 310.

Further, the user terminal 30 may include a camera (camera) such as a GPS (Global Positioning System) signal receiving network, a CCD (Charge Coupled Device) image sensor, and the like. A 3-axis acceleration sensor or the like can also effectively utilize GPS position information in the game, for example.

[Implementation of the processing of the game]

Next, an example of the processing of the game system according to the embodiment of the present invention will be briefly described based on an example of a baseball game as shown in FIGS. 5 and 6A to 6D. FIG. 5 is a flow chart showing the operation of the game system according to an embodiment of the present invention. The flow chart assumes that the ball 608 is thrown by the pitcher character 603 and the scene of the ball 608 is struck by the hitter character 602. Furthermore, in this scene, the pitching motion of the pitcher character 603 and the flight trajectory of the ball are controlled by the game system.

From the executable game displayed on the main menu screen (not shown), the user executes an instruction of the baseball game, and the baseball game starts (S101), as shown in FIG. 6A, the player screen 600 is displayed including the hitter. An initial screen of the character 602, the pitcher character 603, the batting frame 605, the home plate 606, the bat 607, and the hitting cursor 609 (S102).

Further, in FIGS. 6A to 6C, a background image in which an image of a court is photographed from the rear of the hitter character 602 by a virtual camera is displayed. Furthermore, in order to be able to confirm the situation in a wide range, the angle of view of the virtual camera can be changed from a far angle of view and a bird's eye view.

Next, when the pitcher character 603 completes the pitching operation, the ball 608 is also displayed on the game screen while the pitching operation is completed (S103, FIG. 6B). FIG. 6B shows the game screen after the pitcher character performs the pitching, and the hitting cursor 609 and the batting frame 605 are displayed in a semi-transparent manner in order not to obscure the display of the moving ball 608.

The user observes the moving path of the ball 608 moving within the game screen 600, and moves the hitting cursor 609 by the sliding operation (S104). Furthermore, a method of acquiring touch information by a slide operation will be described later. Here, the hitting cursor 609 is a flag for displaying an area where the hitter character 602 may hit the ball, and is displayed above the home plate 606. The hitting cursor moving unit 2 can move the pointing position of the ball hit by the bat swipe 607 by the sliding operation performed by the user on the touch screen to move the hitting cursor 609 at the pointed position of the hitting of the ball. . In addition, the hitting cursor 609 is attached A flag 610 showing the best hit position for the ball. Further, the flag 604 of the preset position when the ball 608 arrives may also be displayed at or near the ball striking frame 605 as needed.

The sliding operation area for moving the above-described hitting cursor 609 is different from the display area of the hitting cursor 609, for example, can be performed in an adjacent area with the display area of the hitting cursor, interlocking with the sliding operation and indirectly causing the hitting The ball cursor 609 moves. In this way, since the hitting cursor 609 can be directly moved without touching the hitting cursor 609, the visibility of the hitting cursor 609 can be prevented by the user's finger, and as a result, the operability at the time of positioning the hitting cursor 609 can be improved.

Next, it is judged whether or not the ball thrown by the pitcher character falls within a predetermined range of the striking position (S105). When the object position determination unit 3 determines that the ball has not fallen within the predetermined range of the striking position, the process returns to step S104, that is, the first mode in which the movement of the hitting cursor is not restricted. When the object position determining unit 3 determines that the ball falls within the predetermined range of the striking position, the process proceeds to step S106, which will be described later. In this case, the first mode is switched to at least a part of the second mode that restricts the movement of the hitting cursor. Furthermore, the predetermined range can be specified by distance. In this case, the time when the ball falls within the predetermined range from the striking position to the time when the ball reaches the striking position is substantially fixed, so that the preparation time of the striking operation or the like can be substantially fixed, and there is sufficient time for the striking operation. Wait.

6C is a diagram showing an example of displaying a game screen when it is determined that the ball dropped by the pitcher character falls within a predetermined range of the striking position. In this case, the hitting cursor movement restricting unit 4 receives the output from the object position judging unit 3, which is, for example, yellow (shaded in FIG. 6C) and fixed to restrict the user from moving the hitting cursor 609. For the principle. However, in order to cope with the change of the ball, the hitting cursor 609 is allowed to move in any direction and position that does not interfere with the downward direction of the striking operation. Therefore, in the second mode in which at least a part of the movement of the hitting cursor 609 is restricted, the user moves the hitting cursor 609 in any direction and position in the downward direction as needed (S106).

Next, the user performs a tilting operation in the upward direction in order to start the striking operation of the ball in order to grasp the timing (S107). The slamming operation for the striking operation is directed upward to prevent interference with the moving operation direction of the hitting cursor 609. FIG. 6D is a schematic diagram showing an example of a game screen in the case where the ball is struck. The flicking operation can be performed at any position on the screen capable of touch operation. In this way, since the slamming operation can be performed without paying special attention to the instantaneous operation position, the degree of freedom of operation can be increased while also improving the operability.

Next, while analyzing the slamming operation and obtaining the direction of the slamming operation and the speed of the slamming operation, the hitter character 602 is caused to start the bat swing (S108). In this type, the speed at which the bat is swept is determined by the speed of the slamming operation. Moreover, the speed of a baseball swing can also depend on the ability of the hitter. A method of acquiring touch information by a flick operation will be described later.

Next, the initial conditions for obtaining the ball flight are completed, and the flight path is calculated (S109). In order to quantitatively calculate the flight path of the ball, the impact of the bat and the ball must be mechanically simulated, and the initial condition of the ball's velocity vector, the axis of rotation, and the amount of rotation of the ball after the impact must be obtained. In addition, when calculating the flight path, the direction of the obtained slamming operation must also be considered. Details for this will be described later.

Furthermore, the relationship between bat strikes and ball strikes is essentially the same as actual baseball. For example, the timing of the bat swing is deviated from the timing of the ball strike, and if it is too late or too late, it will fall. In addition, even if the timing of the bat swing is appropriate, if the trajectory of the bat swing is offset, it is suitable for the range of the position of the ball strike.

In addition, the timing of the bat swing is appropriate, and in the case where the trajectory of the bat swing is within the range of the position suitable for hitting the ball, although the ball strike is generated, various abilities are obtained depending on the state in which the bat 607 collides with the ball 608. Ball flight path. For example, in the case where the lower portion of the bat is struck at the upper portion of the ball 608, the flying ball whose angle of the hitting ball is upward is preset. Further, in the case where the upper portion of the bat is struck at the lower portion of the ball 608, the angle of the hitting ball is preset to roll the earth downward. In addition, the so-called hitting of the core is preset to hit and home run, and in the case of hitting the core, it is preset to be an ordinary blow.

The following describes the acquisition of touch information, the acquisition of initial conditions of ball flight, and the calculation of the ball flight path.

[Getting touch information]

A method of obtaining touch information by a sliding operation or a tilting operation will be described. When the user performs a touch operation on the screen, it detects the contact of the object with the touch screen and specifies the starting position of the touch operation corresponding to the start position of the operation. Next, the touch position stored on the touch screen is detected at a predetermined frequency (for example, a screen update rate of 30 fbps).

In this way, the information of the touch position is obtained sequentially, and the touch position (vector; two-dimensional coordinate position) of the previous screen and the touch position (vector; two-dimensional coordinate position) of the current screen can be calculated. The moving direction of the touch and the distance between the touches are calculated, and the calculated distance is divided by the screen update rate to calculate the speed of the touch operation.

[obtaining the initial conditions of the ball flight]

As described above, in order to strike the ball by the bat strike, and calculate the flight trajectory of the ball generated according to the strike, the collision of the bat with the ball is preferably mechanically simulated. Further, in order to accurately calculate the trajectory of the ball flying in the three-dimensional virtual space, it is necessary to obtain the initial condition of the ball flight of the speed vector, the rotation axis, and the rotation amount of the ball after the hit. In the following, a schematic explanation of the acquisition of the initial conditions of the ball flight is provided, but it should be noted that the present invention is not limited thereby.

First, specify the collision position of the ball on the bat. The collision position can be obtained from the information of the ball flight path before the collision and the movement path of the bat generated by the bat swing.

Next, information on the ball speed vector, the rotation axis, and the amount of rotation after the collision (the initial condition for the ball flight) is obtained. The method for obtaining the initial conditions will be described in detail below.

(Acquisition of the ball velocity vector after collision)

Prior to the collision, the bat moves toward the ball at a velocity V (vector, hereinafter, unless otherwise specified), and the ball moves toward the bat at a velocity v. After the collision, the speed of the bat becomes V', and the speed of the ball becomes v'.

In the above case, the following formulas 1 and 2 are established in accordance with the laws of mechanics. Furthermore, M is the mass of the bat, m is the mass of the ball, and e is the recovery coefficient.

MV+mv=MV’+mv’ (Equation 1)

v-V=-e(v’-V’) (Equation 2)

From the above formulas 1 and 2, the ball velocity v' after the collision is expressed by the following formula 3 using the velocity V of the bat before the collision, the velocity v of the ball, and the recovery coefficient e.

v'=(1+e ^-1 )MV/(M+m)+(m-Me ^-1 )v/(M+m) (Equation 3)

Furthermore, in the above formulas 1, 2, the mass M of the bat and the mass m of the ball are regarded as constant values, but in the case where a more precise discussion is required, there is also a need to use the moment of inertia and the collision position of each axis direction. The "effective quality" represented by the function is used as the quality of the bat and the ball. Further, regarding the restoration coefficient e, there is also a "representational restoration coefficient" that has to be expressed as a function of the collision position. In this way, the ball velocity (vector) after the collision can be obtained.

Next, the rotation (rotation axis, rotation amount) of the ball after the collision will be described. Further, in the calculation of the ball flight path to be described later, it is not necessary to obtain the data relating to the rotation of the ball, regardless of the rotation of the ball.

When the radius of the ball is r, the angular velocity before the collision is ω, and the angular velocity after the collision is ω', the impulse F _x of the long-axis direction of the bat received by the ball from the bat at the time of collision is obtained by the following Expression 4. Further, v _x is a component of the velocity v in the major axis direction of the bat, and v' _x is a component of the velocity v' in the direction of the major axis of the bat.

-F _x =mv' _x -mv _x (Equation 4)

When the impulse F _x obtained by the above formula 4 is used, when the moment of inertia of the ball is expressed as 1, the following formula 5 is derived.

Ω'-ω=F _x r/I (Equation 5)

However, ω' and ω represent the components of the rotational angular velocity ω' and ω of the ball before and after the collision in the longitudinal direction of the bat.

Further, in the case where the ball is a solid sphere such as a baseball, the moment of inertia I is the mass m and the radius r and is given by the following formula 6.

I=(2/5)mr ² (Equation 6)

According to the above formulas 5 and 6, the following expression 7 showing the relationship between the rotational angular velocities ω' and ω of the balls before and after the collision is obtained.

ω'=ω+(5/2mr)F _x (Equation 7)

Thus, the rotational angular velocity ω' of the ball after the collision can be obtained from the rotational angular velocity ω of the ball before the collision. Further, in the above calculation, although it is not necessary to consider the rolling friction coefficient, the sliding friction coefficient, and the angle of the collision surface between the bat and the ball, these parameters may be considered if necessary.

[Calculation of the ball flight path]

As described above, after the initial conditions of the ball flight (the initial velocity (vector) of the ball, the direction of the rotation axis, and the amount of rotation) are acquired, the flight path of the ball is calculated based on the obtained initial conditions.

For calculating the flight path of the ball, various methods that can be completed from a simple calculation to a complicated calculation are considered.

An example of a simple calculation method is to grasp the ball after the collision as a mass point, and calculate the flight path using only the initial velocity (vector) of the ball in the initial condition. In this case, the general solution is first obtained from the equation of motion. Substituting the component of the initial velocity (vector) into the equation specifies the flight path. Furthermore, in this case, there is no need for data relating to the rotation of the ball, and no preparation is required as an initial condition.

An example of a calculation that requires a somewhat complicated calculation is to grasp a ball that is a rigid body, and calculate the flight path of the ball using all of the initial conditions (the initial velocity (vector) of the ball, the direction of the rotation axis, and the amount of rotation). An example of the principle of the flight path calculation (three-dimensional flight trajectory calculation) in this case is as follows.

The external force (vector) acting on the ball has resistance D, buoyancy L, torque T and gravity, the magnitude of the resistance D |D|, the magnitude of the buoyancy |L|, the magnitude of the torque T|T| is an aerodynamic parameter, and The resistance coefficient C _D , the buoyancy coefficient C _L , and the fluid torque coefficient Cm are sequentially expressed as follows.

|D|=0.5ρ|U| ² A*C _D (Equation 8)

|L|=0.5ρ|U| ² A*C _L (Equation 9)

|T|=0.5ρ|U| ² Ad*C _m (Equation 10)

However, ρ: density of air, |U|: magnitude of flight speed of the ball, A: cross-sectional area of the ball diameter, d: diameter of the ball.

Here, the aerodynamic parameters of the drag coefficient C _D , the buoyancy coefficient C _L , and the fluid torque coefficient C _m can be approximated as a function of the rotational speed of the ball and the flight speed. Further, the rotation speed is gradually reduced by the fluid torque, and if necessary, the reduction of the rotation speed N(t) can be considered based on the following model formula (Expression 11).

N(t+Δt)=-ρAdC _m (t)|U| ² Δt/(4πI)+N(t) (Equation 11)

However, C _m (t): fluid torque factor at time t, I: inertia momentum of the ball.

If the resistance (vector) D and the velocity (vector) U of the ball are considered to be opposite directions, and the buoyancy (vector) L is orthogonal to the velocity (vector) U of the ball at the rotation axis Z _R , the in-flight ball can be easily derived. The equation of motion (differential equation), if the initial velocity (vector) of the ball, the direction of the rotation axis, and the amount of rotation are provided as initial conditions, the flight path and the ball of the ball can be obtained by numerical calculation (for example, Euler's law). The speed of rotation.

For more complicated calculation methods, in order to grasp the movement of the ball as the movement of the ball in the fluid (in the air), it is also considered to use the Navier-Stokes equation to force the force acting on the ball. The method of numerical calculation of mechanics. However, this method considers the necessity of precise analysis of the movement of the baseball, the time required for the arithmetic processing, and the ability of the processing system, and the application is limited, and the detailed description will be omitted.

In addition, when it is necessary to obtain the moving direction and distance when the ball is moving after the ball is flying, for example, based on the speed (vector) at the time of the ball landing, the rotational speed, the inclination of the spot, and the dynamic friction coefficient, etc. The bounce and roll of the ball can simulate the direction and distance of the movement.

In addition, regarding the bounce behavior of the ball, it is necessary to consider the coefficient of dynamic friction of the ground, the rotation and velocity of the ball provide energy to each other, and the rebound recovery coefficient is often attenuated. Further, regarding the rolling of the ball, the angular velocity of the ball is obtained based on the calculation of the acceleration based on the rolling resistance of the ground, and the distance at which the ball rolls is determined based on the angular velocity.

Next, a method of influencing the direction of flight of the ball after the striking due to the direction of the slamming operation will be described.

In a simple method, in order to project the initial velocity (vector) v' of the ball on the court plane, the projection vector coincides with the direction of the turbulent operation, so that v' rotates around the axis perpendicular to the plane of the court, and the result is obtained by v. It is preferable to use the initial velocity of the ball. In addition, when the direction of the rotation axis and the amount of rotation are required, the previous value is directly used.

If the above simple method is adopted, depending on the situation, it may be considered that there is some unnaturalness between the bat swing and the flight of the ball. In order to eliminate such unnaturalness, for example, the time interval for the start or delay of the start time of the bat swipe is preset to a function in the swaying operation direction, and the reference time point of the bat swipe is made for the above time interval. Addition and subtraction can also change the start time of the bat swing according to the start time of the slamming operation. In this way, by colliding with the direction of the swaying operation and delaying the start of the bat swing, the collision state of the bat and the ball can be changed. Therefore, the ball can be swung by the natural bat Fly in a direction that roughly matches the slamming operation.

Although the above is exemplified by a baseball game, the present invention is not limited to this, and it is of course applicable to games that hit and move the ball, such as soccer, tennis, billiards, and cricket.

Furthermore, each of the methods constituting the foregoing system may be a dedicated hardware or a virtual method (so-called function implementation method) implemented by a computer to execute the program at each processing stage.

Further, the system may be installed in a game-dedicated device, or may be installed in a mobile terminal such as a mobile phone, a smart phone, a PDA (Personal Digital Assistant), or a mobile personal computer held by a user.

Further, the foregoing system may also be composed of a game system for performing a process for executing a game through a plurality of computers.

1‧‧‧Game system

2‧‧‧Ball Cursor Mobile Unit

3‧‧‧Ball Cursor Movement Restriction Unit

4‧‧‧Object position judgment unit

Claims (19)

A game system, which is a game system for striking an object moving in a three-dimensional virtual space and changing a moving direction, comprising: a hitting cursor moving unit, corresponding to a user performing an operation on the touch panel, and moving the display to the object a hitting cursor of the pointed position of the striking; the object position judging unit judges whether the object falls within a predetermined range from the position at which the object is struck, and the object falls within a position to be struck by the object An output is generated in a range; and a hitting cursor movement restricting unit receives the output of the object position determining unit and at least partially limits an action of the hitting cursor moving unit, wherein the position of the object is not limited in the switching The first mode of movement of the hitting cursor and at least a part of the second mode for restricting the movement of the hitting cursor are simultaneously struck by the striking operation in the predetermined direction on the touch panel. The game system of claim 1, wherein the predetermined range is defined by a distance. The game system according to the first or second aspect of the invention, wherein in the second mode, the moving operation of the hitting cursor is allowed to proceed in a direction different from a direction in which the striking operation of the object is different. The game system according to claim 1, wherein the striking operation of the object can be performed at an arbitrary position. The game system of claim 1, wherein the movement trajectory of the object is calculated based on at least the direction of the striking operation of the user. The game system according to claim 1, wherein the operation of the hitting cursor can be completed at a position that does not hinder the display of the hitting cursor and the object. The game system of claim 6, wherein the moving operation of the hitting cursor is completed in an area adjacent to the hitting cursor. The game system of claim 1, wherein the game system generates an animation that is linked to the position of the object. The game system according to claim 1, wherein the game is a baseball game, and the object is a baseball ball, and the baseball ball is struck by a hitting action of a character in the three-dimensional virtual space. A control method for controlling an object moving in a three-dimensional virtual space and changing a moving direction includes: corresponding to a user performing an operation on the touch screen, and moving a hitting cursor to indicate an indicated position of the object hitting a step of determining whether the aforementioned article falls within a predetermined range from a position at which the object is struck, and generating an output if the object falls within a predetermined range from a position at which the object is struck; and receiving The step of limiting at least a portion of the movement of the hitting cursor, wherein the first mode corresponding to the movement of the hitting cursor is not restricted, and the second mode restricting the second mode of the hitting cursor, corresponding to the position of the object At the same time, the object is struck based on the striking operation performed on the touch panel in a predetermined direction. The control method of claim 10, wherein the predetermined range is defined by a distance. The control method according to claim 10, wherein in the second mode, the moving operation of the hitting cursor is allowed to proceed in a direction different from a direction in which the striking operation of the object is different. The control method according to claim 10, wherein the striking operation on the object can be performed at an arbitrary position. The control method according to claim 10, wherein the movement trajectory of the object is calculated based on at least the striking operation direction of the user. The control method according to claim 10, wherein the control method can be configured to complete the operation of the hitting cursor at a position that does not hinder the display of the hitting cursor and the object. The control method according to claim 15, wherein the moving operation of the hitting cursor can be completed in a region adjacent to the hitting cursor. The control method of claim 10, wherein the control method generates an animation that is interlocked with the position of the object. The control method according to claim 10, wherein the game is a baseball game, the object is a baseball ball, and the baseball ball is struck by a hitting action of a character in the three-dimensional virtual space. A program for executing a program executed by the control method according to any one of claims 10 to 18 in a computer.