JP3653062B2 - Character movement speed control program - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a game for displaying an image of a character that moves in a game field set in a three-dimensional virtual space, and more particularly, to an invention relating to control of the moving speed of a character in the virtual three-dimensional space in the game. .
[0002]
[Prior art]
In recent years, game systems that perform three-dimensional display processing of game screens have become common with the improvement in processing capability of game devices. For example, taking a shooting game as an example, a 3D display of a situation in which a character operated by a player moves in a three-dimensional game field and attacks an enemy character encountered is provided to provide a game full of realism. be able to.
[0003]
In such a game system, in the game field set in a virtual three-dimensional space, a character object or various structures arranged at predetermined coordinate positions are displayed as targets of display of the game screen. The viewpoint position and the gazing point are set according to the situation. As a result, the player can operate the character while viewing an image as if it was shot with a virtual camera that freely moves within the three-dimensional game field.
[0004]
[Problems to be solved by the invention]
In the above three-dimensional action game, for example, when the player is looking at an image taken by a camera fixed in a state having a predetermined relative relationship with a character operated by the player (operation character), the target character of the camera When a character other than the character operated by the player (e.g., corresponding to an enemy character) moves, the apparent speed varies depending on the distance between the camera and the target character. In particular, when the target character is close to the camera, the screen changes at a speed that is difficult for the user to handle, and the user cannot capture the change in the screen, causing a problem in the progress of the game. .
[0005]
[Means for Solving the Problems]
The present invention solves the above-described problem, and controls the moving speed of the character according to the distance between the camera and the target character of interest, making it easier for the user to capture screen changes and enabling smooth game progression The present invention is provided.
[0006]
More specifically, the present invention is stored in a storage device of a computer and executed by the CPU of the computer to cause the computer to place and move a character in the virtual three-dimensional space, so that the virtual three-dimensional space A control processing method for controlling a moving speed of the character in the virtual three-dimensional space in a game in which a field-of-view image obtained by capturing the character from a predetermined viewpoint position corresponding to a virtual camera installed on the game screen is displayed on the game screen The method includes: a distance measuring step of measuring a distance between the virtual camera and the character in the virtual three-dimensional space; and determining whether the measured distance is less than a first distance. In the first determination step and the first determination step, the measured distance is less than the first distance. In a case where the determination is not made, in the first movement speed setting step for setting the movement speed to the first movement speed and the first determination step, the measured distance is less than the first distance. In the second determination step for determining whether the measured distance is larger than the second distance smaller than the first distance, and the measured distance in the second determination step. If but which is determined to be greater than the second distance, the moving speed, the response to the measured distance, rather smaller than the first moving speed, and the second moving speed greater than the speed In the second moving speed setting step to be set and the second determining step, when the measured distance is not determined to be larger than the second distance, the moving speed is set to the second moving speed. 3rd moving speed set to Is a program characterized by comprising a constant step.
[0008]
Furthermore, the speed reduction rate of the moving speed in the moving speed deceleration step of the present invention is calculated from the virtual camera based on the first distance, the second distance, the first moving speed, and the second moving speed. May be determined as a function of the distance to.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
[0010]
FIG. 1 shows a basic configuration of the game device in the present embodiment. A CPU 101 controls the entire game apparatus using programs, data, and the like stored in the RAM 102 and the ROM 105, and executes a character moving speed control process corresponding to the present invention. A RAM 102 has an area for reading a game program 111 and a game data 112 including a character movement speed control processing program stored in the external storage device 110, and a work used when the CPU 101 executes various processes. It also has an area. The external storage device may be realized by, for example, a DVD-ROM drive. In this case, the game program 111 and the game data 112 are stored in the DVD-ROM.
[0011]
An operation unit 103 includes an instruction unit 103a for instructing movement of a character, a cursor, and the like, and a button group 103b for performing predetermined instruction input such as determination / cancellation. The form of the operation unit 103 is not limited to that shown in FIG. 1, and for example, an analog stick may be used instead of the instruction unit 103a and the button group 103b.
[0012]
Reference numeral 104 denotes a communication I / F, which functions as an I / F for connecting to another game device via a cable. A ROM 105 stores a program (for example, a boot program for the game apparatus) for controlling the entire game apparatus, data (for example, setting data for the game apparatus), and the like. A display unit 106 includes a CRT and a liquid crystal screen, and displays a screen related to the game (a screen during the game and a screen for performing various settings in the game).
[0013]
A sound processing device 107 generates BGM and sound effects based on sound data included in the game data 112 and outputs the generated BGM and sound effects to the speaker 108. Reference numeral 110 denotes an external storage device configured by a CD-ROM, a ROM cassette, or the like, and stores the above-described game program 111, game data 112, and user data 113. The stored data is read to the RAM 102 as necessary. The game program 111 is a program for controlling the entire game.
[0014]
Reference numeral 112 denotes game data, which includes data for generating an image of each object (three-dimensional model character, background screen, etc.) constituting the game screen, the above-described sound data, and the like.
[0015]
The user data 113 is data relating to a game progress history. Reference numeral 109 denotes a bus connecting the above-described units.
[0016]
A character movement speed control process executed by the game device according to this embodiment having the above-described configuration will be described below. FIG. 2 is a diagram showing the relationship between the character distance from the camera and the screen display area in the three-dimensional game field.
[0017]
Reference numeral 201 denotes a virtual camera assumed in a game field set in a three-dimensional space, and the camera 201 determines a viewpoint position and a gazing point as a reference for the display range of the game screen. The camera 201 is generally arranged so as to have a predetermined relative relationship with the operation character operated by the player, but in the present embodiment, the presence of the operation character is omitted for simplicity. A character 202 exists in the three-dimensional game field. In this embodiment, the character moves horizontally toward the camera from the right to the left in FIG. 2 by the distance indicated by the arrow. The character 202 includes an enemy character with which the player faces. Accordingly, in FIG. 2, the character 202 is simplified and shown as a circle. However, this is only a means for simplifying the drawing, and it is needless to say that any other form of character can be applied. Yes. In the present embodiment, for the sake of simplicity, it is assumed that the camera 201 is fixed, and only the character 202 moves at a constant speed, and the movement distance is the same regardless of the distance from the camera. . Needless to say, the present invention can be applied even when the camera moves while maintaining a relative relationship with the operation character.
[0018]
The gaze range determined by the camera 201 changes according to the distance from the camera 201 to the point where the character 202 is located, and the range is indicated by 203. Reference numerals 204 to 206 denote gaze areas determined according to the position of the character.
[0019]
FIG. 3 is a diagram illustrating an example of a display screen corresponding to the gaze areas 204 to 206. 301 is an example of a display screen corresponding to the gaze area 204 in FIG. Similarly, reference numerals 302 and 303 denote examples of display screens corresponding to the gaze areas 205 and 206 in FIG. 2, respectively. Referring to the display screens 301 to 303, in the gaze areas 204 and 205, the character 202 moves part of the screen and stays within the display screen. It can be seen that the character 202 moves and is off the screen during a part of the movement period. In this way, when moving within the three-dimensional game field by the same distance, the moving distance on the display screen is relatively larger as the character is closer to the camera, depending on the distance from the camera. Therefore, even if the character moves at a constant speed in the three-dimensional game field, the moving speed on the screen becomes faster as the character is closer to the camera. Therefore, as shown in FIG. 4, when the distance from the camera becomes closer than a certain value (d1), the player can be captured by controlling the character speed to be decelerated to a certain value (v2). .
[0020]
FIG. 4 is a graph showing the relationship between the distance from the camera 201 to the position of the character 202 and the moving speed of the character. The vertical axis of the graph represents the moving speed (v) of the character, and the horizontal axis represents the distance (d) from the camera to the character position. The distance d is determined based on the coordinates where the camera 201 is located in the virtual three-dimensional space and the coordinates where the character 202 is located. The moving speed v is determined based on the distance in the three-dimensional game field where the character can move within a unit time. The character normally moves at a constant speed at a moving speed v1, but when the distance to the camera reaches d1, the moving speed decelerates at a constant deceleration rate, and when the distance to the camera reaches d2. The moving speed reaches v2. In the range where the distance between the character and the camera is d2 or less, the character moves at a constant speed at v2. The speed v when the character 202 is located at a distance d between d2 and d1 from the camera is v = v2 + (v1−v2) × (d−d2) / (d1−d2) as a function f (d) of the distance d. Can be expressed as This expression is an example of expressing the velocity v as a function of the distance d, and is not limited to this. Also good.
[0021]
As described above, in this embodiment, the moving speed is gradually decelerated in a linear function from the time when the distance between the camera 201 and the character 202 reaches d1 until it reaches d2. The user feels less uncomfortable and the game progresses smoothly. On the other hand, depending on the type of game to which the present invention is applied, the moving speed may be changed directly from v1 to v2 when d1 or d2 is reached.
[0022]
In the present embodiment, the relationship between the speeds v1 and v2 can be set such that the speed v2 is 70% of the speed v1, for example. D2 can also be set as a threshold of distance for switching from the shooting mode to the fighting mode in the three-dimensional action game. That is, when the operation character of the player corresponding to the camera position and the enemy character corresponding to the character 202 displayed on the display screen are separated by a distance d2 or more, a mode in which the opponent is defeated by shooting is executed. When the distance is closer than d2, a mode of defeating the opponent by fighting may be executed.
[0023]
Next, processing for character movement speed control according to the distance between the camera 201 and the character 202 in the present invention will be described. FIG. 5 is a flowchart of the movement speed control process in the present invention.
[0024]
In step S501, it is determined whether the distance d between the camera 201 and the character 202 is larger than d1, and if the distance d is larger than d1, the moving speed v of the character 202 is set to v1 in step S502. If it is determined in S501 that the distance d is smaller than d1, whether or not the distance d is d2 or less is determined in Step S503. If the distance d is d2 or less, the speed v is set to v2 in Step S504. The On the other hand, if it is determined in step S503 that the distance d is greater than d2, the speed v is set to the value calculated as a function f (d) of the distance in step S505.
[0025]
In the embodiment in which the battle mode is switched from the shooting mode to the fighting mode according to the distance between the camera 201 and the character 202 as described above, the distance d is smaller than d2 in step S503 of the flowchart of FIG. When it is determined that, it is possible to shift to the fighting mode.
[0026]
[Other Embodiments]
The above processing (for example, processing according to the flowchart shown in FIG. 5 in the above embodiment) is stored as a program in a storage medium such as a CD-R, ROM, DVD-ROM, or MO, and stored in this storage medium. By causing the computer to read (install or copy) the program, the computer can perform the above processing. Therefore, it is obvious that this storage medium is also within the scope of the present invention.
[0027]
Further, the present invention may be applied to a shooting game in which an operation character operated by a player and an enemy character battle each other, or can be applied to other forms of games. The present invention may also be implemented in an arcade game device, a home game device, or an online game device via the Internet.
[0028]
Further, the above character moving speed control process can be realized by a game device having the following configuration. In other words, the game device arranges and moves a character in a virtual three-dimensional space, and plays a visual field image of the character taken from a predetermined viewpoint position corresponding to a virtual camera installed in the virtual three-dimensional space. In the game displayed on the screen, a game device that executes a control process of the moving speed of the character in the virtual three-dimensional space, and measures a distance between the virtual camera and the character in the virtual three-dimensional space Distance measuring means and control means for controlling the moving speed according to the measured distance.
[0029]
Further, the control means of the present invention includes: a first determination means that determines whether the measured distance is less than a first distance; and the first determination means, wherein the measured distance is the first distance. In the case where the distance is less than 1, the moving speed decelerating means for decelerating the moving distance, and the first determining means, when the measured distance is equal to or more than the first distance, the moving In the first moving speed setting means for setting the speed to the first moving speed, the second determining means for determining whether the measured distance is less than the second distance, and the second determining means And a second movement speed setting means for setting the movement distance to a second movement speed when the measured distance is less than the second distance.
[0030]
Further, the speed reduction rate of the moving speed in the moving speed reducing means of the present invention is calculated from the virtual camera based on the first distance, the second distance, the first moving speed, and the second moving speed. May be determined as a function of the distance to.
[0031]
【The invention's effect】
As described above, according to the present invention, when a character moving in a three-dimensional game field approaches the camera, the moving speed of the character can be reduced according to the distance from the camera. It is possible to capture the movement of the game and the change of the display screen, and to make the game progress smoothly.
[0032]
In addition, since the moving speed of the character is gradually decelerated according to the distance between the camera and the character, the player feels less uncomfortable due to the change in the moving speed of the character on the display screen, and the game proceeds smoothly. be able to.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an example of a configuration of a game device according to an embodiment of the present invention.
FIG. 2 is a diagram showing a relationship between a character distance from a camera and a screen display area in the embodiment of the present invention.
FIG. 3 is a diagram showing an example of a display screen corresponding to display screen sizes 204 to 206 in the embodiment of the present invention.
4 is a graph showing the relationship between the distance d from the camera 201 to the character 202 and the moving speed v of the character 202. FIG.
FIG. 5 is a flowchart of a character moving speed control process in the present invention.

Claims (2)

Corresponding to a virtual camera installed in the virtual three-dimensional space by storing and moving characters in the virtual three-dimensional space by being stored in a computer storage device and executed by the CPU of the computer A program for executing a control processing method for controlling a moving speed of the character in the virtual three-dimensional space in a game in which a field-of-view image obtained by capturing the character from a predetermined viewpoint position is displayed on a game screen. Is
A distance measuring step of measuring a distance between the virtual camera and the character in the virtual three-dimensional space;
A first determination step of determining whether the measured distance is less than a first distance;
A first moving speed setting step that sets the moving speed to the first moving speed when the measured distance is not determined to be less than the first distance in the first determining step; ,
In the first determination step, if it is determined that the measured distance is less than the first distance, whether the measured distance is greater than a second distance that is smaller than the first distance. A second determination step for determining;
In the second determination step, when it is determined that the measured distance is greater than the second distance, the movement speed is smaller than the first movement speed according to the measured distance. And a second moving speed setting step for setting a speed larger than the second moving speed;
A third moving speed setting step of setting the moving speed to the second moving speed when the measured distance is not determined to be greater than the second distance in the second determining step; A program comprising:   The moving speed set in the second moving speed setting step is the character from the virtual camera based on the first distance, the second distance, the first moving speed, and the second moving speed. The program according to claim 1, wherein the program is determined by a function of a distance up to.

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