JP7507442B2 - PROGRAM, INFORMATION PROCESSING APPARATUS, AND CONTROL METHOD - Google Patents

Description

Application of Article 30, paragraph 2 of the Patent Act 1. On March 7, 2017, GREE, Inc. released the invention by Daisuke Taka and Shinya Sato et al. to the general public in a closed beta test. 2. https://www.youtube.com/watch?v=ZMkPKeqcNfA On March 29, 2017, GREE, Inc. released the invention by Daisuke Taka and Shinya Sato et al. at the above URL. 3. https://www.youtube.com/watch?v=3dyIQqLtNZQ On March 31, 2017, GREE, Inc. released the invention by Daisuke Taka and Shinya Sato et al. at the above URL.

The present invention relates to a program, an information processing device, and a control method.

Conventionally, in games executed by information processing devices such as smartphones or portable game consoles, a technique is known in which a virtual camera in a three-dimensional virtual space is used as the viewpoint, and an image in which objects in the virtual space are rendered on a two-dimensional plane is displayed as a game screen. For example, Patent Document 1 discloses a configuration for displaying a game screen in which a field on which characters are placed is viewed diagonally from above, using a virtual camera as the viewpoint.

JP 2013-168022 A

However, the screen size of the display device provided in such information processing devices is relatively small, and the visibility of the screen may not always be sufficient. Therefore, there is room for improvement in the visibility of the game screen on information processing devices.

In view of the above circumstances, the object of the present invention is to provide a program, an information processing device, and a control method that improve the visibility of a game screen displayed on an information processing device.

In order to solve the above problems, the program according to the present invention comprises:
An information processing device that executes a game,
A step of placing a virtual camera, a field object, and an object located on the field object in a three-dimensional virtual space;
displaying a game screen including the field object and a two-dimensional image obtained by projecting the object by perspective projection with the virtual camera as a viewpoint;
moving at least one of the field object and the object relative to the virtual camera;
a first correction step of performing a correction such that the object becomes larger as the distance from the virtual camera in the optical axis direction of the virtual camera becomes longer when the distance is within a first range;
and a second correction step of performing a correction such that the object becomes smaller as the distance becomes longer, when the distance is within a second range different from the first range in the optical axis direction of the virtual camera.

Further, an information processing device according to the present invention comprises:
A display unit and a control unit are provided.
The control unit is
A virtual camera, a field object, and an object located on the field object are arranged in a three-dimensional virtual space;
displaying, on the display unit, a game screen including the field object and a two-dimensional image obtained by projecting the object by perspective projection, with the virtual camera as a viewpoint;
moving at least one of the field object and the object relative to the virtual camera;
When a distance of the object from the virtual camera in a direction of an optical axis of the virtual camera is within a first range, a correction is performed such that the object becomes larger as the distance becomes longer;
When the distance is within a second range different from the first range in the optical axis direction of the virtual camera, a correction is performed such that the object becomes smaller as the distance becomes longer.

Further, the control method according to the present invention comprises:
A method for controlling an information processing device that executes a game, comprising:
A step of placing a virtual camera, a field object, and an object located on the field object in a three-dimensional virtual space;
displaying a game screen including the field object and a two-dimensional image obtained by projecting the object by perspective projection with the virtual camera as a viewpoint;
moving at least one of the field object and the object relative to the virtual camera;
a first correction step of performing a correction such that the object becomes larger as the distance from the virtual camera in the optical axis direction of the virtual camera becomes longer when the distance is within a first range;
and a second correction step of performing a correction such that the object becomes smaller as the distance becomes longer, when the distance is within a second range different from the first range in the optical axis direction of the virtual camera.

The program, information processing device, and control method according to the present invention improve the visibility of the game screen displayed on the information processing device.

1 is a block diagram of an information processing apparatus according to an embodiment of the present invention; FIG. 2 is a diagram showing objects arranged in a three-dimensional virtual space. 1 is a diagram showing a field object, a first object, and a virtual camera arranged in a three-dimensional virtual space as viewed from the Xw axis direction. FIG. 2 is a diagram showing a first example of a field screen. FIG. 1 is a diagram showing three objects with the same size of projected images by perspective projection. 13 is a diagram showing a first example of the relationship between the distance from the virtual camera in the optical axis direction and the magnification of the size of a first object. FIG. FIG. 13 is a diagram showing a second example of a field screen. 13 is a diagram showing a second example of the relationship between the distance from the virtual camera in the optical axis direction and the magnification of the size of the first object. FIG. 4 is a flowchart showing an operation of the information processing device.

The following describes an embodiment of the present invention with reference to the drawings.

(Overview of information processing device)
An overview of an information processing device 10 according to a first embodiment of the present invention will be described with reference to Fig. 1. The information processing device 10 is, for example, a smartphone, a PC, or a portable game device, and is capable of executing a game application according to this embodiment. The game application may be received from a predetermined application distribution server via the Internet, for example, or may be stored in advance in a storage device provided in the information processing device 10 or a storage medium such as a memory card that can be read by the information processing device 10.

(Game Overview)
An overview of the game according to the present embodiment will be described. The game according to the present embodiment includes one or more game parts. At least one game part may be executed using a game medium.

Game media is electronic data used in a game, and includes any media, such as cards, items, virtual currency, tickets, characters, and avatars. Game media is also electronic data that can be acquired, owned, used, managed, exchanged, synthesized, enhanced, sold, discarded, or donated by a user within a game, but the manner in which game media can be used is not limited to those explicitly stated in this specification.

Hereinafter, unless otherwise specified, "game media owned by a user" refers to game media associated as owned game media with a user ID that can uniquely identify the user. Furthermore, "granting a game medium to a user" refers to associating the game medium as owned game media with a user ID. Furthermore, "discarding a game medium owned by a user" refers to dissolving the association between a user ID and owned game media. Furthermore, "consuming a game medium owned by a user" refers to the possibility of generating some effect or influence in the game in response to dissolving the association between a user ID and owned game media. Furthermore, "selling a game medium owned by a user" refers to dissolving the association between a user ID and owned game media, and associating another game medium (e.g., virtual currency or an item, etc.) as owned game media with the user ID. Furthermore, "transferring a game medium owned by user A to user B" refers to dissolving the association between user A's user ID and owned game media, and associating the game medium with user B's user ID as owned game media. Additionally, "creating game media" refers to defining or determining at least a portion of the information about the game media.

A game part is a content that a user can play in a game, and includes, for example, quests, missions, mini-games, training, strengthening, and synthesis of game media, events to obtain game media, events to explore the virtual space, and events to battle opponents (for example, other users, enemy characters, enemy buildings, etc.). One or more predetermined tasks (game tasks) may be set for each game part. For example, if it is determined that the user has succeeded in achieving one or more game tasks set for the game part played by the user, the user may be given, for example, game media, etc. as a reward. The game tasks may be any task depending on the content of the game part, such as a task to win a battle against an enemy character, a task to reach a goal point in the virtual space, and a task to prevent the user's character from reaching a predetermined state (for example, a state incapacitated) until a predetermined time has passed. In addition, the achievement of a specific task (clear task) among one or more game tasks set for a game part is also referred to as the completion of the game part. If a user playing a game part succeeds in achieving the clear task, the game part may be determined to be cleared, and the game part may end.

For example, a user playing a game operates a user character placed on a field in a three-dimensional virtual space. The user character moves on the field in response to user operations. The field may be provided with various areas, such as towns and dungeons. Various events may occur according to the area, such as conversation events with town resident characters and battle events with enemy characters encountered in dungeons. The story of the game may progress as events are executed. When the user wins a battle against an enemy character, the user may be granted game media, such as an item, virtual currency, or a character.

In the game according to this embodiment, a game screen is displayed that includes a two-dimensional image in which an object in a three-dimensional virtual space is projected onto a virtual screen by perspective projection, with a virtual camera in the three-dimensional virtual space as the viewpoint. For example, a projected image of an object projected onto a virtual screen is displayed on the game screen. Hereinafter, an object on the screen is also referred to as a projected image of the object. On the game screen using perspective projection, a sense of perspective is expressed according to the distance from the virtual camera. Specifically, the size of the projected image of the object changes according to the distance between the virtual camera and the object. For example, the farther the object is from the virtual camera in the virtual space, the smaller the projected image of the object becomes. Furthermore, in the game according to this embodiment, when a certain condition is satisfied, a process is executed to correct the size of the object itself so as to reduce the change in the size of the projected image of the object according to the distance from the virtual camera. Details of the process of the game according to this embodiment will be described later.

(Configuration of information processing device)
A specific description will be given of the configuration of the information processing device 10. The information processing device 10 includes a communication unit 11, a storage unit 12, a display unit 13, an input unit 14, and a control unit 15.

The communication unit 11 includes an interface capable of communicating with an external device wirelessly or via a wired connection. The communication unit 11 may include, for example, a wireless communication module compatible with a mobile communication standard such as LTE (Long Term Evolution) (registered trademark), a wireless LAN communication module, or a wired LAN communication module.

The storage unit 12 includes, for example, a primary storage device and a secondary storage device. The storage unit 12 may include, for example, a semiconductor memory, a magnetic memory, or an optical memory. The storage unit 12 stores information and programs used in processing the game. The information and programs used in processing the game may be obtained from an external device via the communication unit 11. For example, a game application program may be obtained from a specified application distribution server. Hereinafter, the application program is also simply referred to as an application. Also, for example, information used in processing the game may be obtained from a server device of a game provider.

The display unit 13 includes a display device such as a liquid crystal display or an organic EL display. The display unit 13 is capable of displaying a variety of screens.

The input unit 14 includes an input interface that detects user operations on the information processing device 10. The input interface may include, for example, physical keys and a pointing device. The pointing device may include, for example, a mouse, a touchpad, and a touch panel that is integral with the display unit 13.

The control unit 15 includes one or more processors. The processor may include a general-purpose processor that realizes a specific function by loading a specific program, and a dedicated processor specialized for a specific process. The control unit 15 controls the operation of the entire information processing device 10. For example, the control unit 15 executes a game application in response to a user operation on the display unit 13. The control unit 15 also executes various processes related to the game.

For example, as shown in Figs. 2 and 3, the control unit 15 places a field object 20, a first object 21, a second object 22, and a virtual camera 24 in a three-dimensional virtual space in which a world coordinate system is set. The virtual camera 24 is not shown in Fig. 2. The second object 22 is not shown in Fig. 3. The world coordinate system includes, for example, an Xw axis, a Yw axis, and a Zw axis.

The field object 20 corresponds to a virtual field (e.g., the ground). A texture image of the field (e.g., the ground) may be projected onto the field object 20. The field object 20 may be, for example, a sheet-like object with substantially no thickness.

At least a part of the field object 20 has a curved shape. The entire field object 20 may have a curved shape. The curved shape may be composed of one or more free-form surfaces, or may be composed of multiple polygons. Hereinafter, the curved shape part of the field object 20 is also referred to as a curved portion. For example, the shape of the curved portion of the field object 20 may be approximately the same as a curved shape that is convex in the positive direction of the Zw axis. For example, the shape of the curved portion of the field object 20 may be approximately the same as a shape in which a curve that is convex in the positive direction of the Zw axis on the Yw-Zw plane is extended in the Xw axis direction, as shown in Figures 2 and 3. Here, "the shape of the curved portion approximately matches a predetermined shape" means that the shape of the curved portion may differ in detail from the predetermined shape. For example, the shape of the curved portion may be a shape in which unevenness or holes are formed in at least a part of the predetermined shape.

A movable area in which the first object 21 can move may be set on the field object 20, as described below. For example, the movable area may correspond to a road on the field. A no-entry area into which the first object 21 cannot enter may be set on the field object 20. For example, the no-entry area may correspond to a river, pond, sea, etc. on the field.

The first object 21 corresponds to a game medium that can move within a movable area on the field object 20. The game medium that can move within a movable area on the field object 20 may include, for example, a user character operated by a user, a companion character that moves automatically following the user character, and an NPC (Non Player Character) that moves automatically. A texture image of the corresponding first game medium may be projected onto the first object 21. The first object 21 is placed on the surface of the field object 20 on the positive side of the Zw axis. In this embodiment, the first object 21 corresponding to the user character is placed within a target area 23 on the field object 20. The target area 23 is at least a part of the movable area described above.

The second object 22 corresponds to a game medium that does not move on the field object 20. The game medium that does not move on the field object 20 may include installed objects such as buildings, walls, and trees. A texture image of the corresponding second game medium may be projected onto the second object 22. The second object 22 is placed on the surface of the field object 20 on the positive side of the Zw axis.

The shapes of the first object 21 and the second object 22 can be determined arbitrarily. For example, the first object 21 and the second object 22 may be flat with no thickness.

The orientation of the placed first object 21 and second object 22 may be controlled by the control unit 15 so as to satisfy a predetermined condition with respect to the virtual camera 24.

For example, the predetermined condition may include a condition that the specific direction set for the first object 21 and the second object 22 is approximately parallel to the optical axis 25 of the virtual camera 24. The specific direction may be the normal direction of the object that has a planar shape. Alternatively, the specific direction may be any direction indicated by the object coordinate system set for the object.

For example, the specified condition may also include a condition that the specific direction set for the first object 21 and the second object 22 faces the virtual camera 24.

The virtual camera 24 is used in the process of displaying a field screen, which will be described later, on the display unit 13. The position, orientation, and field of view of the virtual camera 24 can be determined arbitrarily.

3, the virtual camera 24 may be located on the positive side of the Zw axis with respect to the field object 20. The orientation of the virtual camera 24 may be determined so that the optical axis 25 is approximately parallel to the Yw-Zw plane. The orientation of the virtual camera 24 may be determined so that the optical axis 25 intersects with the field object 20. The right direction as viewed from the virtual camera 24 may approximately coincide with the positive direction of the Xw axis. The angle between the normal to the curved portion of the field object 20 and a line parallel to the optical axis 25 of the virtual camera 24 may differ depending on the distance from the virtual camera 24 in the direction of the optical axis 25. The position, orientation, and field of view of the virtual camera 24 may be determined so that the target area 23 is included in the field of view of the virtual camera 24. The position, orientation, and field of view of the virtual camera 24 may be determined so that at least a part of the curved portion of the field object 20 is included in the field of view of the virtual camera 24. When the target area 23 is included in the field of view of the virtual camera 24, at least a part of the first object 21 corresponding to the user character is included in the field screen described later.

The control unit 15 causes the display unit 13 to display a game screen based on perspective projection in which the virtual space is viewed from the viewpoint of the virtual camera 24. In detail, the control unit 15 generates a two-dimensional image in which objects in the virtual space are drawn on a two-dimensional plane by perspective projection, with the virtual camera 24 as the viewpoint. The control unit 15 causes the display unit 13 to display a game screen including the two-dimensional image. Hereinafter, the game screen including the two-dimensional image is also referred to as a field screen.

The field screen may include at least a portion of the field object 20, at least a portion of the first object 21, and at least a portion of the second object 22. For example, the field screen shown in FIG. 4 includes a portion of the field object 20, a first object 21 that corresponds to the user character and is located within the target area 23, and a second object 22 that corresponds to a building.

The control unit 15 moves at least one of the field object 20, the first object 21, and the second object 22 relative to the virtual camera 24. Moving the object relative to the virtual camera 24 includes moving at least one of the virtual camera 24 and the object in the virtual space. As described above, the second object 22 corresponding to the game medium that does not move on the field object 20 moves integrally with the field object 20.

A process of moving the first object 21, which is a user character, relative to the virtual camera 24 will be described in detail. When the first object 21 is located within the target area 23, the control unit 15 moves the first object 21 within the target area 23 relative to the virtual camera 24, either automatically or in response to a user operation. At this time, the first object 21 also moves relative to the field object 20. Therefore, on the field screen, the field object 20 does not move, and the first object 21 moves within the target area 23.

When the moving first object 21 reaches the edge of the target area 23, the control unit 15 stops the movement of the first object 21 relative to the virtual camera 24. Meanwhile, the control unit 15 continues the movement of the first object 21 relative to the field object 20. In other words, the control unit 15 stops the first object 21 moving in a certain direction relative to the virtual camera 24, and moves the field object 20 relative to the virtual camera 24 in the opposite direction. Therefore, on the field screen, the first object 21 does not move, and the field object 20 moves.

The process of moving the field object 20 relative to the virtual camera 24 will be described in detail. For example, when the moving first object 21 reaches the end of the target area 23 in the positive direction of the Xw axis, the control unit 15 translates the field object 20 in the negative direction of the Xw axis. Conversely, when the moving first object 21 reaches the end of the target area 23 in the negative direction of the Xw axis, the control unit 15 translates the field object 20 in the positive direction of the Xw axis. As the field object 20 translates in the Xw axis direction, the field object 20 moves left and right on the field screen.

For example, when the moving first object 21 reaches the front end of the target area 23 as viewed from the virtual camera 24, the control unit 15 slides the field object 20 toward the back side. Conversely, when the moving first object 21 reaches the back end of the target area 23 as viewed from the virtual camera 24, the control unit 15 slides the field object 20 toward the front side. As described above, the field object 20 is, for example, a sheet-like object with substantially no thickness. The sliding movement of the field object 20 may include a mode in which the sheet-like field object 20 moves as if being sent out along a trajectory including the cross-sectional shape of the field object 20 by a plane approximately parallel to the Yw-Zw plane, as shown by the double arrow in FIG. 3. As the field object 20 slides, the field object 20 slides toward the back or front side on the field screen.

When moving the field object 20 relative to the virtual camera 24, the control unit 15 changes at least one of the position, size, and shape of the target area 23 on the field object 20 according to the relative positional relationship between the virtual camera 24 and the field object 20. Moving the field object 20 relative to the virtual camera 24 includes moving at least one of the virtual camera 24 and the field object 20 in the virtual space.

For example, the control unit 15 may change the position of the target area 23 on the field object 20 so that the target area 23 is included in the field of view of the virtual camera 24. The control unit 15 may change the position of the target area 23 on the field object 20 so as to maintain the relative position of the target area 23 with respect to the virtual camera 24.

For example, the control unit 15 may change at least one of the size and shape of the target area 23 on the field object 20 according to the movable area on the field object 20 included in the field of view of the virtual camera 24. As a specific example, an example in which the movable area on the field object 20 is a road will be described. As the first object 21, which is the user character, advances along the road on the field object 20, for example, the width and shape of the road may change. In such a case, the control unit 15 may change at least one of the size and shape of the target area 23 according to the width and shape of the road included in the field of view of the virtual camera 24.

For example, in a configuration in which the shape of the field object 20 (e.g., the curvature of a curved surface) can change, the control unit 15 may change at least one of the position, size, and shape of the target area 23 on the field object 20 in response to the change in the shape of the field object 20.

The control unit 15 corrects the size of the first object 21 according to the distance between the virtual camera 24 and the first object 21 in the direction of the optical axis 25 of the virtual camera 24. Hereinafter, the distance from the virtual camera 24 in the direction of the optical axis 25 is also referred to as the optical axis direction distance. By correcting the size of the first object 21, for example, the change in size of the projected image of the first object 21 due to perspective projection can be reduced. This will be explained in detail below.

As described above, with perspective projection, the size of the projected image of an object changes depending on the optical axis direction distance. Specifically, the shorter the optical axis direction distance, the larger the projected image of the object becomes, and the longer the optical axis direction distance, the smaller the image becomes. In contrast, by making the size of the object itself smaller as the optical axis direction distance becomes shorter and larger as the optical axis direction distance becomes longer, it is possible to reduce the change in the size of the projected image of the object relative to the optical axis direction distance. For example, as shown in Figure 5, when the optical axis direction distance changes from n to n±d, correcting the size of the object itself with a magnification factor α = (n±d)/n will make the size of the projected image of the object equal before and after the change in the optical axis direction distance.

6, when the optical axis direction distance of the first object 21 is within a first range, the control unit 15 makes the first object 21 larger as the optical axis direction distance becomes longer and makes the first object 21 smaller as the optical axis direction distance becomes shorter. The first range is a range of distances in the optical axis 25 direction of the virtual camera 24 corresponding to the target area 23 on the field object 20 (i.e., a range of optical axis direction distances). The first range may be expressed by, for example, the following formula (1), where the optical axis direction distance is L.
n-d≦L≦n+d (1)
The control unit 15 may correct the size of the first object 21 by a magnification α according to the optical axis direction distance L. The correction may change the size of the first object 21. The magnification α of the size of the first object 21 when the optical axis direction distance L is within a first range may be represented by, for example, the following formula (2).
α=L/n (n−d≦L≦n+d) (2)

The effect of this configuration will be explained below in comparison with the case where the size of the first object 21 is not corrected.

7, if the size of the first object 210 is not corrected, the visibility of the field screen may not be sufficient. Specifically, according to perspective projection, the shorter the optical axis direction distance L of the first object 210, the larger the projected image of the first object 210 (first object 210b relative to first object 210a in the figure). The projected image of the first object 210b located in the foreground on the field screen is relatively large. Therefore, the probability that other objects are hidden in the shadow of the first object 210b increases, and the visibility of the screen is not necessarily sufficient. On the other hand, the longer the optical axis direction distance L of the first object 210, the smaller the projected image of the first object 210 (first object 210c relative to first object 210a in the figure). The projected image of the first object 210c located in the background on the field screen is relatively small. Therefore, the visibility of the first object 210c is not necessarily sufficient.

In response to this, for example, when the first object 21 moves within the target area 23, the control unit 15 corrects the size of the first object 21 according to the optical axis direction distance L. In detail, when the first object 21 exists within the target area 23, the optical axis direction distance of the first object 21 is within the above-mentioned first range. The control unit 15 may correct the size of the first object 21, for example, using the magnification α calculated by the above-mentioned formula (2). By correcting the size of the first object 21 with the magnification α, for example, as shown in FIG. 7, the size of the projected image of the first object 21 can be constant within the target area 23 (first objects 21b and 21c with respect to the first object 21a in the figure). As described above, the target area 23 is an area on the field object 20 in which the first object 21 corresponding to the user character may exist. For this reason, the user operating the user character is likely to pay attention to the target area 23 on the field screen. Therefore, within the target area 23 that is likely to attract attention, the change in size of the projected image of the first object 21 is reduced, improving the visibility of the field screen.

When the optical axis direction distance L of a first object 211 corresponding to a first game medium other than a user character, such as an NPC, is within the second range, the control unit 15 makes the first object 211 smaller as the optical axis direction distance L increases and makes the first object 211 larger as the optical axis direction distance L decreases. The second range is the range of distances in the direction of the optical axis 25 of the virtual camera 24 (i.e., the range of the optical axis direction distance L). The second range may be expressed by, for example, the following formula (3).
n-d-e≦L≦n-d, n+d≦L≦n+d+e (3)
The magnification α of the size of the first object 211 when the optical axis direction distance L is within the second range may be expressed by, for example, the following equation (4).

According to this configuration, the sense of incongruity of the field screen is reduced, as will be described below.
6, when the optical axis direction distance L=n±d, the magnification α=(n±d)/n. Therefore, when the first object 211 is located at the front or back edge of the target area on the field screen, the magnification α of the first object 211 is no longer 1.
When the magnification α ≠ 1, for example, the scale of the second object 22 does not match that of the first object 211 corrected at the magnification α ≠ 1. In contrast, when the first object 211 moves forward or backward from the target area 23 on the field screen, the magnification α of the size of the first object 211 approaches 1 in the above-mentioned second range. Therefore, for example, the scale of the second object 22 matches that of the first object 211 that moves forward or backward from the target area 23 on the field screen, and the sense of incongruity on the field screen is reduced.

For example, when the optical axis direction distance L of the first object 211 corresponding to an NPC is within the third range, the control unit 15 maintains the size of the first object 211 constant regardless of the optical axis direction distance L. In other words, the control unit 15 stops the change in the size of the first object 211 according to the optical axis direction distance L. The third range is the range of distance in the direction of the optical axis 25 of the virtual camera 24 (i.e., the range of the optical axis direction distance L). The third range may be expressed by, for example, the following formula (5).
L≦n−d−e, n+d+e≦L (5)
The magnification α of the size of the first object 211 when the optical axis direction distance L is within the third range may be expressed by, for example, the following equation (6).
α=1 (L≦n−d−e, n+d+e≦L) (6)

With reference to FIG. 7, the size of the projected image of the first objects 21 and 211 when the size of the first objects 21 and 211 is corrected according to the optical axis direction distance L will be described. Areas A, B, and C shown in FIG. 7 are areas on the field screen corresponding to the first range, second range, and third range described above, respectively. In area A, the size of the projected image of the first objects 21 and 211 can be constant (see first objects 21a-21c, 211a, and 211b in the figure). In area B, as the first object 211 moves away from the front end or the back end of area A, the size of the projected image of the first object 211 changes by perspective projection while the magnification α of the size of the first object 211 changes to approach 1 (i.e., approaching the same scale as the second object 22) (see first objects 211c and 211e in the figure). In area C, the magnification α of the first object remains at 1, but the size of the projected image of the first object 211 changes due to perspective projection (see first object 211d in the figure).

For example, as shown in FIG. 6, in the above example, the magnification α changes linearly with respect to the optical axis direction distance L in the first and second ranges. However, the change in the magnification α with respect to the optical axis direction distance L is not limited to a linear change. For example, as shown in FIG. 8, the magnification α may change curvedly with respect to the optical axis direction distance L in the first and second ranges.

The operation of the information processing device 10 will be described with reference to Figure 9.

Step S100: The control unit 15 places a virtual camera 24, a field object 20, a first object 21, and a second object 22 in a three-dimensional virtual space.

Step S101: The control unit 15 causes the display unit 13 to display a game screen using perspective projection of a virtual space viewed from the virtual camera 24 as the viewpoint.

Step S102: The control unit 15 moves at least one of the field object 20, the first object 21, and the second object 22 relative to the virtual camera 24.

Step S103: The control unit 15 corrects the size of the first object 21 according to the distance between the virtual camera 24 and the first object 21 in the direction of the optical axis 25 of the virtual camera 24. The size of the first object 21 may change due to the correction. After that, the process returns to step S102.

As described above, the information processing device 10 according to this embodiment corrects the size of the first object 21 according to the distance between the virtual camera 24 and the first object 21 in the direction of the optical axis 25 of the virtual camera 24. With this configuration, for example, the change in size of the projected image of the first object 21 due to perspective projection can be reduced, thereby improving the visibility of the field screen.

Although the present invention has been described based on the drawings and examples, it should be noted that a person skilled in the art would be able to easily make various modifications and corrections based on this disclosure. Therefore, it should be noted that these modifications and corrections are included in the scope of the present invention. For example, the functions included in each means, step, etc. can be rearranged so as not to cause logical inconsistencies, and multiple means, steps, etc. can be combined into one or divided.

For example, in the above-described embodiment, a configuration has been described in which the size of the projected image of the first object 21 is controlled by correcting the size of the first object 21 according to the optical axis direction distance L. In other embodiments, the size of the projected image of the first object 21 may be corrected without correcting the size of the first object 21.

Specifically, when the optical axis direction distance of the first object 21 is within a first range, the control unit 15 may make the projected image of the first object 21 larger as the optical axis direction distance increases, and may make the projected image of the first object 21 smaller as the optical axis direction distance decreases. When the optical axis direction distance of the first object 211 corresponding to a first game medium other than the user character is within a second range, the control unit 15 may make the projected image of the first object 211 smaller as the optical axis direction distance increases, and may make the projected image of the first object 211 larger as the optical axis direction distance decreases. When the optical axis direction distance of the first object 211 is within a third range, the control unit 15 may maintain the size of the projected image of the first object 211 constant regardless of the optical axis distance.

In addition, the games in the above-mentioned embodiments have been described as role-playing games or simulation games, but the present invention is applicable to games of various genres in which game media is moved around a field within the game.

In addition, in the above-described embodiment, some of the various game screens may be web displays displayed on the information processing device 10 based on data generated by a server device capable of communicating with the information processing device 10, and some of the game screens (e.g., a header area and a footer area in which menu buttons are arranged) may be native displays displayed by a native application installed on the information processing device 10. In this way, the game according to the above-described embodiment may be a hybrid game in which the information processing device 10 and the server device each handle part of the processing.

In addition, a device capable of executing information processing, such as a computer or a mobile phone, can be suitably used to function as the information processing device 10 according to the above-described embodiment. Such a device can be realized by storing a program describing the processing contents for realizing each function of the information processing device 10 according to the embodiment in a memory unit of the device, and having the CPU of the device read and execute the program.

REFERENCE SIGNS LIST 10 Information processing device 11 Communication unit 12 Storage unit 13 Display unit 14 Input unit 15 Control unit 20 Field object 21, 21a-21c, 210a-210c, 211a-211e First object 22 Second object 23 Target area 24 Virtual camera 25 Optical axis

Claims (12)

An information processing device having a display unit,
A virtual camera, a field object, and an object located on the field object are arranged in a three-dimensional virtual space;
displaying on the display unit a game screen including two-dimensional images obtained by projecting the field object and each of the objects by perspective projection with the virtual camera as a viewpoint;
Run the command,
In displaying the game screen, the information processing device
when the object located within a first range on the field object is a first object movable on the field object, keeping a size of the two-dimensional image of the first object constant even if a distance between the virtual camera and the first object changes ;
When the object is a second object that does not move on the field object, changing the size of the two-dimensional image of the second object in accordance with a change in the distance between the virtual camera and the second object . The program according to claim 1, which causes the information processing device to move at least one of the field object and the object relative to the virtual camera. In the relative movement of the first object with respect to the virtual camera,
The program according to claim 2 , further comprising: when the first object reaches an end of the first range from within the first range, stopping the movement of the first object relative to the virtual camera. In the relative movement of the first object with respect to the virtual camera,
The program according to claim 2 or 3, further comprising: when the first object reaches an end of the first range from within the first range, moving the field object relative to the virtual camera in a direction opposite to the direction of movement of the first object. the field object has a curved surface portion,
The program according to any one of claims 1 to 4, wherein an angle between a normal to the curved surface portion and a straight line parallel to an optical axis of the virtual camera varies depending on a distance from the virtual camera in the optical axis direction of the virtual camera. In displaying the game screen, the information processing device
The program according to any one of claims 1 to 5, further comprising: when the first object is located within the first range, the larger the first object is made the longer the distance between the virtual camera and the first object, thereby keeping the size of the two-dimensional image of the first object constant. In displaying the game screen, the information processing device
The program according to claim 6, further comprising: when the first object is located within a second range on the field object that is closer to the virtual camera than the first range, the longer the distance between the virtual camera and the first object, the smaller the first object becomes. The program according to claim 7, wherein the size of the two-dimensional image of the first object when the first object reaches the boundary between the first range and the second range from within the second range is the same as the size of the two-dimensional image of the first object when the first object is located within the first range. In displaying the game screen, the information processing device
The program according to any one of claims 6 to 8, further comprising: when the first object is located within a third range on the field object that is farther from the virtual camera than the first range, the longer the distance between the virtual camera and the first object, the smaller the first object becomes. The program according to claim 9, wherein the size of the two-dimensional image of the first object when the first object reaches the boundary between the first range and the third range from within the third range is the same as the size of the two-dimensional image of the first object when the first object is located within the first range. A display unit;
A virtual camera, a field object, and an object located on the field object are arranged in a three-dimensional virtual space;
a control unit that causes the display unit to display a game screen including two-dimensional images obtained by projecting the field object and each of the objects by perspective projection with the virtual camera as a viewpoint;
having
In displaying the game screen, the control unit
when the object located within a first range on the field object is a first object movable on the field object, keeping a size of the two-dimensional image of the first object constant even if a distance between the virtual camera and the first object changes ;
when the object is a second object that does not move on the field object, changing a size of the two-dimensional image of the second object in accordance with a change in a distance between the virtual camera and the second object ;
23. An information processing apparatus comprising: A method for controlling an information processing device having a display unit, comprising:
The information processing device,
A virtual camera, a field object, and an object located on the field object are arranged in a three-dimensional virtual space;
displaying on the display unit a game screen including two-dimensional images obtained by projecting the field object and each of the objects by perspective projection with the virtual camera as a viewpoint;
Including,
In displaying the game screen, the information processing device
when the object located within a first range on the field object is a first object movable on the field object, keeping a size of the two-dimensional image of the first object constant even if a distance between the virtual camera and the first object changes ;
and when the object is a second object that does not move on the field object, changing a size of the two-dimensional image of the second object in accordance with a change in a distance between the virtual camera and the second object .

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