JP2017029577A - Game system, control method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an index used for controlling movement of an object from being concealed by a finger of a player.SOLUTION: An ideal line 110 of a touch locus is displayed (S101) and information of a target index 140 indicating an arrival target position of a slide operation is acquired (S102). When a start position is designated, and the slide operation in a prescribed direction corresponding to a back swing is continued, a touch position for every prescribed time is stored as touch information (S103), and a touch locus 120 is displayed. Information of a touch index 130 indicating a latest touch position, is acquired (S104), the touch index 130 is displayed as an arcuate line with the target index 140(S105). The arcuate lines of the respective indexes 130, 140 can be viewed without being fully concealed by a finger of a player during the slide operation.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a game system, a control method, and a program, and more particularly to a game system, a control method, and a program characterized by displaying an index when controlling the movement of an object in a game space based on touch information. It is.

  A power gauge for determining shot power is displayed on a game screen of a golf game that operates in response to a player's operation, and the shot power is changed when a shot element (for example, a club) is changed by the player's operation. Therefore, a golf game apparatus has been proposed in which the position of the return sign corresponding to the maximum power is changed accordingly (see Patent Document 1). The return sign is used to reverse the cursor moving along the power gauge. When the cursor reaches an appropriate position after the cursor is reversed, the player hits the ball according to the shot power according to the operation of the player. Is done.

  Further, when a guide trajectory for causing the player to perform a batting operation (slide operation) is displayed on the operation screen, and a slide operation is performed in a clockwise direction so as to trace the guide trajectory, a back swing is performed to the player character. If the direction of the slide operation is reversed within the range not exceeding the end point and the slide operation is executed in the counterclockwise direction, the player character is caused to downswing and hit the ball when passing the predetermined impact position. A golf game apparatus provided has been proposed (see Patent Document 2). Patent Document 2 also discloses that the back swing amount is adjusted by adjusting the reversal position of the slide operation.

JP 2004-321303 A JP 2012-70960 A

  Although the golf game apparatus of Patent Document 1 changes the position of the return sign corresponding to the maximum power by changing the club or the like, it cannot be changed in the player's batting operation process, and the batting operation It lacked the flexibility of time and was insufficient to realize the reality of the game.

  Further, although the golf game apparatus of Patent Document 2 can adjust the backswing amount at the time of a hitting operation, an index or the like serving as a guideline for adjusting the backswing amount is not displayed, and the backswing amount is intended by the player. It was difficult to control.

  The present invention has been made paying attention to the above circumstances, and its object is to provide a game system characterized by displaying an index when controlling the movement of an object in the game space based on touch information, A control method and a program are provided.

  A basic form of the present invention for solving the above problem is a game system that moves an object in a game space based on a player's operation, and acquires a touch position by a slide operation of the player every predetermined time, Touch information acquisition means for storing a combination of a touch position and a touch time as touch information, and touch index information for acquiring the latest touch position from the touch information acquisition means and acquiring information of a touch index indicating the latest touch position An acquisition unit; a target index information acquisition unit that acquires information on a target index indicating a target position reached by a touch position; and a unit that displays the touch index and the target index. The touch index and the target index are players. The present invention relates to a game system characterized in that it can be visually recognized during the operation.

  According to the present invention, it is possible to prevent an index used when controlling the movement of an object in the game space based on touch information from being hidden by a player's finger or the like.

FIG. 1 is a block diagram showing a configuration of a system according to an embodiment of the present invention. FIG. 2 is a block diagram showing an example of a hardware configuration for realizing the system according to the embodiment of the present invention. FIG. 3 is a flowchart showing an example of a process for a golf game according to an embodiment of the present invention. FIG. 4A is an explanatory view schematically showing a display screen of the golf game and one mode of operation according to the embodiment of the present invention. FIG. 4B is an explanatory diagram schematically showing a display screen of the golf game and one mode of operation according to the embodiment of the present invention.

The outline of the embodiment of the present invention is listed as an example as follows.
[Form 1]
A game system for moving an object in a game space based on an operation of a player,
Touch information acquisition means for acquiring a touch position by a slide operation of the player every predetermined time, and storing a combination of the touch position and the touch time as touch information;
Touch index information acquisition means for acquiring a latest touch position from the touch information acquisition means, and acquiring information of a touch index indicating the latest touch position;
Target index information acquisition means for acquiring target index information indicating the target position of the touch position;
Means for displaying the touch indicator and the target indicator;
The game system is characterized in that the touch index and the target index are visible when operated by a player.
According to the first embodiment, when the player performs a slide operation, the touch index and the target index can be visually recognized without being completely hidden by the player's finger or the like, and therefore object movement control can be performed accurately. .

[Form 2]
In the first aspect, the touch index may be a linear line extending from the latest touch position.
According to the second embodiment, the touch index is displayed as a linear line, so that the certainty of visual recognition can be increased.

[Form 3]
In the second aspect, the touch indicator and the target indicator may be displayed as arc-shaped lines.
According to the third embodiment, the touch index and the target index are displayed as arc-shaped lines, so that the certainty of visual recognition of both can be further increased.

[Form 4]
In the first to third embodiments, an ideal line display unit that displays an ideal line of the touch trajectory may be further provided.
According to the fourth embodiment, a guide for the slide operation can be given, and the movement control of the object can be performed more accurately.

[Form 5]
In the first to fourth aspects, the game may be a golf game.
According to the fifth embodiment, the movement control of the golf ball can be realized accurately and simply.

Another embodiment of the present invention relates to a control method having substantially the same contents as the above-described systems, and a program for realizing the method by a computer.
The method and the program also have the same operational effects as the system.

  Hereinafter, an embodiment according to the present invention will be described in detail with reference to the drawings. In addition, this invention should not be limited to embodiment described below, and should be interpreted based on description of a claim. In addition, it should be noted that those skilled in the art can use other similar embodiments, and can make changes or additions as appropriate without departing from the present invention.

  FIG. 1 is a block diagram showing a configuration of a system 1 according to an embodiment of the present invention. The system 1 includes “touch information acquisition means 2”, “touch index information acquisition means 3”, “target index information acquisition means 4”, and “index display means 5”.

The system 1 may include an “ideal line display unit 6”.
Details of the functions performed by the components 2 to 6 of the system 1 will be described in detail below.

  FIG. 2 is a block diagram showing an example of a hardware configuration 10 for realizing the system 1 according to the embodiment of the present invention. The hardware configuration 10 includes a CPU 11, a GPU (graphic processor unit) 12, an interface 13, and a storage unit 14. The CPU 11, GPU 12, interface 13, and storage unit 14 are connected by a bus 15.

  For example, an operation unit 16 including an operation button group (not shown) and a touch screen is connected to the interface 13. In addition, for example, a sound output unit 17 for outputting game sound or the like is connected to the interface 13.

  A display unit 19 is connected to the GPU 12, and a VRAM (video RAM) 20 is connected via a memory bus 21. Note that the operation unit 16 and the display unit 19 may be integrated to form a touch panel.

  For example, the CPU 11 performs a process for controlling the game by executing a program downloaded from the outside.

  The GPU 12 performs a drawing process according to an instruction from the CPU 11 and displays a game image on the display unit 19. Further, the GPU 12 performs a drawing process in accordance with an instruction from the CPU 11 according to an operation input of the operation unit 16 by the user, and displays it on the display unit 19.

  The interface 13 controls data exchange between the CPU 11 and the operation unit 16 or a peripheral device (not shown).

  Next, an outline of an example of processing of the system 1 according to the embodiment of the present invention will be described based on an example of a golf game as shown in FIGS. 3, 4A, and 4B.

  When the execution of the golf game is instructed from the executable games displayed on the main menu screen (not shown), the golf game is started, and the player character is displayed on the game screen 100 as shown in FIGS. 4A and 4B. 102 is displayed. As can be seen from FIGS. 4A and 4B, the player character 102 has a golf club (hereinafter simply referred to as “club”) 104 and hits a golf ball (hereinafter simply referred to as “ball”) 106.

  In addition, a distance from the hitting position to the cup (here, Yard (Y)) is displayed at the top of the game screen 100, and an image obtained by shooting the golf course with the virtual camera from behind the player character 102 is used as a background image. Is displayed. Note that the viewpoint of the virtual camera may be a long-distance viewpoint or a bird's-eye viewpoint so that the state of the hall can be confirmed over a wide range.

  First, a trajectory (ideal line) 110 for causing the player to perform an ideal slide operation is displayed on the game screen 100 (S101). Note that the ideal line 110 may draw different trajectories depending on the type of golf club selected by the player.

  Furthermore, on the game screen 100, a target 116 serving as a target position target after the reversal of the slide operation is displayed on the upper right. The target 116 can have different sizes depending on the type of golf club selected by the player. For example, when the golf club is a sand wedge, the target may be enlarged.

  In conjunction with the slide operation of the player, the player character 102 performs a backswing action, and an animation is displayed on the screen (see FIG. 4A). An animation is displayed on the screen so as to perform a downswing and follow-through operation after the flick operation described later (see FIG. 4B).

Further, information on the target index for indicating the target position of the slide operation is acquired (S102).
As shown in FIGS. 4A and 4B, the player designates the start position of the swing operation by touching an appropriate position near one end point of the ideal line 110 in the game screen 100, and moves in a predetermined direction corresponding to the backswing. When the slide operation is continued, the touch position is acquired and stored as touch information at a predetermined time (for example, 30 fps frame rate) (S103), and the touch track 120 is displayed on the game screen 100 based on the touch information. Is displayed. Then, information on the touch index representing the latest touch position is acquired (S104), and the touch index 130 is displayed on the game screen as an arcuate line together with the previously acquired target index 140 (S105). The arc-shaped line representing the touch index 130 and the arc-shaped line representing the target index 140 give an indication of the position when the actual touch position or the target position is concealed by a player's finger or the like and is difficult to see. . Further, in order to distinguish the arcuate line representing the ideal line 110, the touch trajectory 120, the touch indicator 130, and the arcuate line representing the target indicator 140, the thickness and color of the line may be changed.

  Subsequent operations will be described. When the direction of the slide operation is reversed and flicked at an appropriate inversion position 114, the ball 106 can be hit and fly. An example of the method will be described below.

  A flick motion is detected by analyzing the touch information, and the speed and direction of the flick motion are acquired and stored as flick information. At that time, if necessary, the ideal line and the touch trajectory may be compared to obtain a deviation between them. Details will be described later.

  Next, based on the flick information, at least one of the flight conditions of the ball (eg, the initial velocity (vector) of the ball, the direction of the rotation axis, the spin amount) is calculated and set. Details of the flight condition calculation / setting method will be described later.

  Next, the flight of the ball is started based on the set flight condition, and the flight path of the ball 106 is sequentially calculated. The principle of flight path calculation (three-dimensional flight trajectory calculation) is roughly as follows.

As the external force (vector) acting on the ball, there are a drag D, a lift L, a torque T, and gravity, but the magnitude of the drag D | D |, the magnitude of the lift L | L |, and the magnitude of the torque T The magnitude | T | is expressed as follows using a drag coefficient C _D , a lift coefficient C _L , and a fluid torque coefficient C _m , which are aerodynamic coefficients.
| D | = 0.5ρ | U | ² A * C _D (1)
| L | = 0.5ρ | U | ² A * C _L (2)
| T | = 0.5ρ | U | ² Ad * C _m (3)
Where ρ: air density, | U |: magnitude of the flying speed of the ball, A: golf ball diameter cross-sectional area, and d: golf ball diameter.

Here, the aerodynamic parameters of the drag coefficient C _D , the lift coefficient C _L , and the fluid torque coefficient C _m can be approximately expressed as a function of the rotational speed and flying speed of the ball. Each aerodynamic parameter is also dependent on the shape, arrangement and arrangement of dimples attached to the golf ball.

Drag (vector) D, it is the velocity (vector) U opposite direction of the ball, lift (vector) L is considering that such orthogonal speed of the ball and (vector) U to the rotation axis Z _R, It is possible to easily derive the equation of motion (differential equation) of the ball during flight. Given the initial velocity (vector), the direction of the axis of rotation, and the spin rate as the initial conditions, the flight trajectory of the ball and the rotation of the ball The speed can be obtained by numerical calculation (for example, Euler method).

  Note that a run (distance, direction) after the ball 106 has landed may be calculated. And the total flight distance of the ball | bowl containing the calculated | required run may be displayed on the center of the game screen 100 as needed.

  Hereinafter, acquisition of touch information, acquisition of target index and touch index information, analysis of touch information and acquisition of flick information, comparison of ideal line and touch trajectory, flight conditions based on flick information (initial velocity of ball (vector The details of the calculation / setting of the direction of the rotation axis and the spin amount) will be described.

Acquisition of touch information When the player performs a touch operation on the screen, the contact of an object with the touch screen is detected, and the start position of the touch operation corresponding to the start position of the swing operation is designated. Then, the touch position on the touch screen is detected and stored at a predetermined cycle (for example, a frame rate of 30 fbps).

  In this way, when the slide operation in a predetermined direction corresponding to the backswing is continued, the touch position information is sequentially acquired, and the slide operation from the touch start point is performed based on the touch position information recorded for each frame. A trajectory corresponding to is displayed on the screen. Thereby, the player can confirm the locus.

  The trajectory is drawn by connecting the touch position (coordinate position) of the previous frame and the touch position (coordinate position) of the current frame with a line, but the touch position (coordinate position) of the previous frame and the touch position of the current frame are drawn. By calculating the distance to (coordinate position) and dividing the calculated distance by the frame rate, the speed of the slide operation is calculated. Information on the speed of the slide operation is also stored as touch information.

Acquisition of target index and touch index information The target index is an arc-shaped line that is displayed on the screen to indicate the inversion position of the touch operation to the player, and the arc-shaped line is, for example, a touch operation in an ideal line. Is set to pass through the point that should be the reverse position. Incidentally, the locus of the ideal line is, for example, a curve obtained by projecting a curve drawn on the surface of a predetermined sphere O onto the screen. In this case, a line segment α connecting the center C of the predetermined sphere O and the point to be the start point of the touch operation in the ideal line, and the inversion of the touch operation in the center C of the predetermined sphere O and the ideal line. If the angle formed by the line segment β connecting the points to be positioned is θ, the intersection of the predetermined sphere O with a straight line passing through the center C of the predetermined sphere O and the angle formed by the line segment α is θ A part of the curve obtained by projecting the trajectory on the screen may be used as the target index.

Moreover, what is necessary is just to acquire the information of a touch parameter | index as follows, for example.
That is, a line segment connecting a point on the surface of the predetermined sphere O corresponding to the start point of the touch operation (obtained by back projecting the screen onto the predetermined sphere O) and the center C of the predetermined sphere O. When the angle between α ′ and a line segment β ′ connecting the point on the surface of the predetermined sphere O corresponding to the latest touch position and the center C of the predetermined sphere O is θ ′, the predetermined sphere A part of a curve obtained by projecting the trajectory of the intersection of a straight line passing through the center C of O and the line segment α ′ with an angle θ ′ and the predetermined sphere O onto the screen is used as a touch index. That's fine. Note that since the touch index needs to be moved in accordance with the slide operation, it is necessary to acquire the information of the touch index at every predetermined time (for example, a frame rate of 30 fbps).

Analysis of touch information and acquisition of flick information A flick action can be detected by analyzing the touch information. In order to detect the flick action, it is necessary to specify the reverse position of the slide operation. That is, when the touch position (coordinate position) of the previous frame and the touch position (coordinate position) of the current frame are connected by a line, the touch position (coordinate position) of the previous frame is set as the start point, and the touch position (coordinate position) of the current frame is obtained. A two-dimensional vector as the end point is obtained for each frame. The projection of the vector of the current frame (projection vector) is calculated with respect to the vector of the previous frame, and the direction of the vector of the previous frame and the projection of the current frame are calculated. When the vector directions differ by 180 °, the touch position of the previous frame may be set as the reverse position of the touch operation. In this case, the locus from the starting point position of the touch operation to the reverse position corresponds to a backswing.

  Then, since the two-dimensional vector having the start position of the reversal position of the slide operation and the end position of the slide operation by the flick operation is determined, the direction of the flick operation is acquired and the slide operation corresponding to the flick operation is performed. The speed of the flick operation is acquired from the speed. Further, information on the length of the locus from the start position of the touch operation corresponding to the backswing amount to the reverse position is also acquired.

Comparison of ideal line and touch trajectory When the ideal line trajectory is a curve obtained by projecting a curve on a predetermined spherical surface onto the screen, a virtual image obtained by projecting the center of the predetermined sphere onto the screen Find the intersection of the ideal line and the straight line that passes through the center point and the touch position for each frame, calculate the distance between the touch position and the intersection for each frame, and calculate the amount of deviation from the ideal line for each frame. Ask. The average of these deviation amounts is taken as the deviation amount from the ideal line. The shift amount is positive when the touch position is closer to the virtual center point than the ideal line, and negative when the touch position is far from the ideal line.

  In addition, although the case where the locus | trajectory of a touch position meanders and cross | intersects an ideal line and draws an S shape is assumed, in such a case, the amount of deviation will take a positive / negative value. In such a case, for example, when the total amount of positive displacement is larger than the total absolute value of negative displacement, the negative displacement amount is ignored and the average of the positive displacement amounts is set to the ideal line. You may make it employ | adopt as deviation | shift amount from. If the total absolute value of the negative deviation is greater than the total positive deviation, ignore the positive deviation and use the average of the negative deviation as the deviation from the ideal line. You may do it.

Calculation / setting of flight conditions (initial velocity (vector) of ball, direction of rotation axis, spin amount) based on flick information etc. Before explaining the method of setting flight conditions using information of player's touch operation, flick A method for acquiring a flight condition parameter based on information or the like will be described with reference to FIGS. 4A and 4B.

  A target 116 is displayed in the upper right part of FIGS. 4A and 4B. The target 116 is displayed as a circular area as shown in FIGS. 4A and 4B, and the collision position information is acquired by designating the radius and declination by the circular coordinates fixed to the circular area. it can. Further, the radius of the circular region can be changed depending on, for example, the type of club.

  By the flick operation, the icon 150 is made to fly toward the target 116 at the speed and direction of the flick operation. If the icon 150 is assumed to be a mass point that flies, for example, with the speed and direction of the flick motion as the magnitude and direction of the initial velocity, respectively, and assuming that the mass point collides with the target 116, the icon 150 is The position of the target 116 that collides with the circular region can be acquired as a moving radius and a declination angle based on the circular coordinates. In addition, when the icon 150 does not collide with the target 116 or when it collides with an extreme position, there may be cases where the player swings or choro (the ball rolls only slightly due to a miss shot).

  Under the above assumption, an example of a method for setting a flight condition using information such as a flick action will be described.

The information acquired by the flicking operation is summarized as follows.
(A) Length of the locus from the start position of the touch operation to the reverse position (equivalent to the backswing amount)
(I) Radius and declination of the collision position where the icon collides with the target sphere (determined by the speed and direction of the flick action)
(U) Deviation between ideal line and touch trajectory (deviation)

On the other hand, the parameters to be set as the initial conditions for flight are as follows as described above.
(A) Initial velocity magnitude (b) Initial lateral blur angle (c) Launch angle (elevation angle)
(D) Direction of rotation axis (e) Spin amount

  An example of the correspondence between parameters (a) to (e) to be set as initial conditions for flight and information (a) to (u) acquired by flicking or the like will be described in detail below. It should be noted that the following description is merely an example and is not limited thereto.

(1) Initial velocity of the ball (vector)
The initial velocity (vector) of the ball is determined by the magnitude of the initial velocity, the initial lateral blur angle, and the launch angle (elevation angle).
The magnitude of the initial speed is determined by the club head speed and the rebound performance of the ball, but the club head speed is highly correlated with the backswing amount, so the magnitude of the initial speed is the starting position of the touch operation. Is set as a function of the length of the trajectory from to the reversal position. In setting the initial speed, information on the speed of the flick operation may be taken into consideration.
The initial lateral blur angle is set as a function of the deviation amount from the ideal line, but as described above, the deviation amount can take a positive or negative value, and accordingly, the initial lateral blur angle also takes a positive or negative value. I can take it.
The launch angle (elevation angle) depends on the loft angle of the club used, and is set by adding a first correction amount to the reference launch angle determined for each club. In this case, the first correction amount is calculated, for example, by multiplying the output value of a predetermined evaluation function (evaluation function 1) using the radius and declination of the collision position as variables and a coefficient determined for each club. .

(2) Direction of rotation axis The direction of the rotation axis is, for example, another evaluation using a predetermined direction (for example, the positive X-axis direction) as a reference direction and the reference direction as a variable in the radius and angle of collision. It is determined by rotating around the Z-axis by the output value of the function (evaluation function 2).

(3) Spin amount The spin amount is set by adding a second correction amount to the reference spin amount determined for each club to be used. In this case, the second correction amount is calculated by multiplying the output value of still another evaluation function (evaluation function 3) using the radius and declination of the collision position as variables and a coefficient determined for each club.

  The function forms of the evaluation functions 1 to 3 may be set as appropriate. Further, instead of using a function, a table corresponding to the evaluation functions 1 to 3 may be prepared, and an output may be acquired by so-called table calculation.

  Also, regarding the run direction and distance when the ball lands and runs after flight, the ball bounces based on, for example, the speed (vector) at the time of landing of the ball, the rotational speed, the inclination of the landing point, the dynamic friction coefficient, etc. The run direction and distance can be simulated by numerically calculating the rolling and rolling. In addition, since the launch angle is considered to be a dominant factor, the run distance when hit with a driver can be set as a function of the launch angle as a simple method.

  As for the bounce behavior of the ball, it is necessary to consider that the spin and speed of the ball give energy to each other due to the dynamic friction coefficient of the ground, and that the reflection on the ground is attenuated by a repulsion coefficient. . Further, regarding the ball rolling, the angular velocity of the ball can be obtained after calculating the acceleration due to the downhill due to gravity and the acceleration due to the rolling resistance of the ground, and the distance over which the ball rolls can be obtained based on the angular velocity.

  In the above example, the description has been made based on the flicking operation, but the touch is continued even after the reversal of the slide operation so that the touch locus collides with the target, and the various parameters described above are acquired from the collision position. It may be.

  As described above, the golf game has been described as an example. However, the present invention is not limited to this, and can be applied to a game in which a ball is hit or spun to fly, for example, a game using a baseball ball or a soccer ball. Needless to say. In addition, the present invention can be generally applied when controlling the movement of an object in the game space based on touch information.

  Each means constituting the system may be dedicated hardware, but is virtual means (so-called function present means) realized at each processing stage by the computer executing the program. May be.

The system may be mounted on a game-dedicated device, but is mounted on a portable terminal such as a mobile phone, a smartphone, a PDA (Personal Digital Assistant), or a portable personal computer owned by the user. It may be a thing.

Furthermore, the system can be configured as a game system in which each process for executing a game is distributedly processed by a plurality of computers or the like.

DESCRIPTION OF SYMBOLS 1 System 2 Touch information acquisition means 3 Touch index information acquisition means 4 Target index information acquisition means 5 Index display means 6 Ideal line display means 10 Hardware structure 11 CPU
12 GPU
13 Interface 14 Storage Unit 15 Bus 16 Operation Unit 19 Display Unit 20 VRAM
21 Memory Bus 100 Game Screen 102 Player Character 104 Golf Club 106 Golf Ball 110 Ideal Line 114 Reversal Position of Touch Operation 116 Target 120 Touch Trajectory 130 Touch Indicator 140 Target Indicator 150 Icon

Claims (11)

A game system for moving an object in a game space based on an operation of a player,
Touch information acquisition means for acquiring a touch position by a slide operation of the player every predetermined time, and storing a combination of the touch position and the touch time as touch information;
Touch index information acquisition means for acquiring a latest touch position from the touch information acquisition means, and acquiring information of a touch index indicating the latest touch position;
Target index acquisition means for acquiring target index information indicating the target position of the touch position;
Means for displaying the touch indicator and the target indicator;
The game system is characterized in that the touch index and the target index are visible when operated by a player.   The game system according to claim 1, wherein the touch index is a linear line extending from the latest touch position.   The game system according to claim 2, wherein the touch indicator and the target indicator are displayed as arc-shaped lines.   The game system according to any one of claims 1 to 3, further comprising an ideal line display means for displaying an ideal line of a touch trajectory.   The game system according to claim 1, wherein the game is a golf game. A game control method for moving an object in a game space based on an operation of a player,
Acquiring a touch position by a slide operation of the player every predetermined time, and storing a combination of the touch position and the touch time as touch information;
Acquiring information of a touch index indicating the latest touch position;
Obtaining information of a target index indicating an ultimate target position of the touch position;
Displaying the touch indicator and the target indicator;
And the touch index and the target index are visible when operated by the player.   The control method according to claim 6, wherein the touch index is a linear line extending from the latest touch position.   8. The control method according to claim 7, wherein the touch index and the target index are displayed as arc-shaped lines.   The control method according to any one of claims 6 to 8, further comprising a step of displaying an ideal line of a touch trajectory.   The control method according to any one of claims 6 to 9, wherein the game is a golf game.   The program for making a computer perform the control method of any one of Claims 6-10.

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