JP2013202223A - Game device - Google Patents

Abstract

【Task】
The present invention provides a game apparatus capable of 3D display of an object without giving an unpleasant sensation to a player while maintaining a sense of reality even in a game in which the distance between a virtual camera and a target object changes. For the purpose.
[Solution]
When a specific event occurs (step S1), the distance between the virtual camera 30 and the target object 31 (player character) changes (step S2). Based on the distance A between the virtual camera 30 and the target object 31, the virtual camera 30 in which the ratio of (distance between the virtual camera and the target object) / (distance between the virtual camera and the 3D screen surface) is a predetermined value P. And the distance B between the 3D screen surface 32 are specified (step S3). Next, the position of the 3D screen surface 32 is determined according to the change in the distance between the virtual camera 30 and the target object 31 (step S4), and the movement is executed (step S5).
[Selection] Figure 5

Description

  The present invention has a 3D display having a parallax barrier, and displays a stereoscopic image with parallax for an object existing in a virtual space for each frame, thereby enabling stereoscopic viewing of a game screen. Relates to the device.

  2. Description of the Related Art In recent years, game devices that employ a parallax barrier system that enables stereoscopic viewing with the naked eye of objects such as characters appearing in games have been put into practical use. In this parallax barrier method, for example, a liquid crystal slit extending in a slit shape is arranged as a parallax barrier, an image having parallax is combined into a single image and displayed on a liquid crystal panel for image display, and light from a backlight is displayed. Is blocked by a plurality of liquid crystal slits so that light passing through different pixels can be seen through the right eye and the left eye. As a game device using such a parallax barrier method, for example, the game device described in Patent Document 1 can be cited.

  By the way, in a game apparatus using such a parallax barrier method, when a parallax is provided to an object in a virtual space on the game to enable 3D display, as shown in FIG. 30 and a target object 31 such as a player character that the virtual camera 30 follows the movement of, a 3D screen surface 32 is provided, and the object 33b closer to the target object 31 than the 3D screen surface 32 has a small parallax. The object 33a that is displayed with a depth and is closer to the virtual camera 30 than the 3D screen surface 32 is displayed so as to appear three-dimensionally protruding from the screen by increasing the parallax ( FIG. 8 is a diagram showing a case where the virtual space is viewed from a height direction perpendicular to the ground).

  Conventionally, the distance between the 3D screen surface 32 and the virtual camera 30 is generally fixed. In games such as action games where the distance between the virtual camera 30 and the target object 31 changes, FIG. As shown in (b), the presence of sufficient realism such that only the object 33a that is very close to the virtual camera 30 appears three-dimensionally pops out even though the distance between the virtual camera 30 and the target object 31 is sufficient. The object 33 could not be displayed in 3D while holding As a method of solving such a problem, the ratio of (distance between the virtual camera and the target object) / (distance between the virtual camera and the 3D screen surface) is maintained to be a predetermined value, and the stereoscopic view is used. It is conceivable to generate an image.

  However, in recent action games, the virtual camera 30 and the target object 31 are used for the purpose of improving entertainment properties, such as giving the player a more realistic sensation by the game or realizing a change in the tension in the game. There are also games where the distance changes dramatically. In such a game, if the position of the 3D screen surface 32 is suddenly changed in accordance with the change in the distance between the virtual camera 30 and the target object 31, the parallax of the object 33a changes rapidly, and the change There is a problem that the player's eyes are not attached to the size, giving the player an unpleasant sensation, and the object 33a appears to be overlapped by being shifted in two without being viewed stereoscopically.

JP 2011-257682 A

  The present invention solves such a problem. Even in a game in which the distance between the virtual camera and the target object changes, the object can be maintained without giving an unpleasant feeling to the player while maintaining a sense of reality. An object of the present invention is to provide a game device capable of 3D display.

  The present invention has a 3D display having a parallax barrier, and displays a stereoscopic image with parallax for an object existing in a virtual space for each frame, thereby enabling stereoscopic viewing of a game screen. An apparatus, a virtual camera, 3D screen plane setting means for setting a 3D screen plane perpendicular to a line segment connecting the target object followed by the virtual camera, and the virtual camera and the target object according to the progress of the game When the distance between the virtual camera and the target object is changed by the distance changing means, the ratio of (distance between the virtual camera and the target object) / (distance between the virtual camera and the 3D screen surface) is changed. 3D screen surface position adjusting means for adjusting the position of the 3D screen surface so that the value becomes a predetermined value, and the 3D screen surface Image generating means for generating a stereoscopic image having no parallax for an object located farther from the virtual camera and having parallax for an object located closer to the virtual camera than the 3D screen surface; Display means for displaying the stereoscopic image generated by the image generation means on a 3D display, and the 3D screen surface position adjustment means includes: (distance between virtual camera and target object) / (virtual camera and 3D screen surface) The present invention relates to a game apparatus characterized in that the position of the 3D screen surface is moved step by step until the ratio of (distance) becomes a predetermined value.

  For example, even if an event occurs depending on the progress of the game and the distance between the virtual camera and the target object changes, the distance between the virtual camera and the target object / (virtual camera and 3D screen surface) Since the position of the 3D screen changes stepwise so that the ratio of the distance) becomes a predetermined value, the parallax of the object does not change abruptly, giving the player an unpleasant sensation, or the object is three-dimensional 3D display of an object can be performed without causing problems such as being invisible.

  In the present invention, the distance storage means for storing the distance between the virtual camera and the 3D screen surface, and the virtual camera and the 3D screen surface stored in the distance storage means each time the distance between the virtual camera and the 3D screen surface changes. Distance update means for updating the distance, and the 3D screen surface position adjustment means includes: (distance between virtual camera and target object) / (virtual camera and 3D screen); The difference between the virtual camera and the 3D screen surface, which is the distance between the virtual camera and the 3D screen surface when the ratio of the distance to the surface) becomes a predetermined value, is the distance between the virtual camera and the 3D screen surface stored in the distance storage means. It is preferable to move the position of the 3D screen surface so as to be a predetermined ratio of the difference from the reference distance.

  The virtual camera and the 3D when the ratio of the distance between the virtual camera and the 3D screen surface after the change and the (distance between the virtual camera and the target object) / (the distance between the virtual camera and the 3D screen surface) is a predetermined value. By moving the position of the 3D screen surface so that the difference from the reference distance, which is the distance to the screen surface, becomes a predetermined ratio of the difference between the distance between the virtual camera before the change and the 3D screen surface and the reference distance. For example, when the distance from the current position of the 3D screen surface to the final position is 8 m, the 3D screen surface moves to a position where the distance to the final position is 4 m, The distance to the final position is moved every two frames, such as the distance to the final position is 2 m.

  Therefore, the moving distance is large at first, and the moving distance decreases at a predetermined rate, and the 3D screen surface moves to the target predetermined position. As a result, the position of the 3D screen surface changes smoothly, the parallax does not change abruptly, and the player's eyes do not feel uncomfortable.

  In the present invention, the 3D screen surface position adjusting means is independent of the predetermined ratio when the difference between the distance between the virtual camera stored in the distance storage means and the 3D screen surface and the reference distance is equal to or smaller than the predetermined distance. It is preferable to move the 3D screen surface to a position where a ratio of (distance between the virtual camera and the target object) / (distance between the virtual camera and the 3D screen surface) becomes a predetermined value.

  If the process of moving the 3D screen surface by a predetermined ratio with respect to the distance from the current position of the 3D screen surface to the final reference position is continued, the movement of the 3D screen surface will not be completed indefinitely. The movement of the position of the 3D screen surface is completed when the position of the screen surface is close to a certain position. By doing in this way, generation | occurrence | production of an unnecessary arithmetic processing can be prevented.

  In the present invention, the 3D screen surface position adjusting means includes (distance between virtual camera and target object) / (virtual camera and target camera) within a predetermined frame after the distance changing means changes the distance between the virtual camera and the target object. It is preferable to move the position of the 3D screen so that the ratio of the distance to the 3D screen surface) becomes a predetermined value.

  By moving the position of the 3D screen surface within a predetermined frame, the 3D screen surface is moved relatively quickly to the original position while smoothing the movement of the 3D screen surface. be able to.

  In the present invention, the maximum distance is set in advance as the distance between the virtual camera and the 3D screen surface, and the 3D screen surface position adjusting means preferably moves the position of the 3D screen within the range of the maximum distance.

  When an object is displayed in 3D, the parallax increases as the object is farther from the 3D screen surface and closer to the virtual camera. If the distance between the virtual camera and the 3D screen surface is too large, an object located far from the 3D screen surface has too much parallax and cannot be viewed stereoscopically, making it unsightly. Therefore, such a problem can be prevented by determining the maximum value of the distance between the virtual camera and the 3D screen surface. When the distance between the virtual camera and the target object is greatly separated, the distance between the virtual camera and the target object / the distance between the virtual camera and the 3D screen is moved to a reference position where the ratio is a predetermined value. However, since the distance between the virtual camera and the 3D screen surface exceeds the maximum value, the 3D screen surface is closer to the virtual camera so that the maximum value can be maintained.

  The present invention has a 3D display having a parallax barrier, and displays a stereoscopic image with parallax for an object existing in a virtual space for each frame, thereby enabling stereoscopic viewing of a game screen. A game program executed in the apparatus, the game apparatus comprising: a virtual camera; a 3D screen plane setting unit that sets a 3D screen plane perpendicular to a line segment that connects a target object that the virtual camera follows; If the distance between the virtual camera and the target object is changed by the distance changing means according to the distance change means for changing the distance between the virtual camera and the target object, the (distance between the virtual camera and the target object) / (virtual camera The position of the 3D screen surface is adjusted so that the ratio of the distance to the 3D screen surface) becomes a predetermined value 3D screen surface position adjusting means and an object located farther from the virtual camera than the 3D screen surface has no parallax, and an object located closer to the virtual camera than the 3D screen surface has a parallax. The 3D screen surface position adjusting unit is configured to function as an image generating unit that generates an image for viewing and a display unit that displays the stereoscopic image generated by the image generating unit on the 3D display. The present invention relates to a game program characterized in that the position of the 3D screen surface is moved stepwise until the ratio of (distance) / (distance between the virtual camera and the 3D screen surface) reaches a predetermined value.

  The present invention has a 3D display having a parallax barrier, and displays a stereoscopic image with parallax for an object existing in a virtual space for each frame, thereby enabling stereoscopic viewing of a game screen. A game screen display method executed in an apparatus, comprising: a step of setting a 3D screen plane perpendicular to a line segment connecting a virtual camera and a target object followed by the virtual camera; When the distance between the virtual camera and the target object changes, the ratio of (distance between the virtual camera and the target object) / (distance between the virtual camera and the 3D screen surface) is predetermined. The step of adjusting the position of the 3D screen surface so that the value of A step of generating a stereoscopic image having no parallax for the object at the position and having a parallax for an object located closer to the virtual camera than the 3D screen surface, and the generated stereoscopic image And a step of adjusting the position of the 3D screen surface, the ratio of (distance between the virtual camera and the target object) / (distance between the virtual camera and the 3D screen surface) is a predetermined value. The present invention relates to a game screen display method characterized by moving the position of a 3D screen surface step by step.

1 is an external view of a game device according to an embodiment of the present invention. It is a block diagram which shows the structure of the game device concerning embodiment of this invention. It is a figure showing the relationship between the virtual camera in the game device concerning embodiment of this invention, a target object, and 3D screen surface. It is a figure showing the 3D screen surface management table in the game device concerning embodiment of this invention. It is an example of the flowchart about the movement process of the 3D screen surface concerning embodiment of this invention. It is an example of the flowchart about the position determination process of the 3D screen surface concerning embodiment of this invention. It is a figure showing the relationship between a virtual camera, a target object, and a 3D screen surface. It is a figure showing the relationship between the virtual camera in a conventional game device, a target object, and a 3D screen surface.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an external view showing a configuration of a game device applied to this embodiment. In the portable game apparatus 1, the first display 11 is stored in the upper housing 17a, and the second display 12 is stored in the lower housing 17b. A hinge portion 17c is provided on the lower side of the upper housing 17a and is connected to the upper side of the lower housing 17b so as to be freely opened and closed. A sound release hole of the speaker 15 is formed on the right side of the first display 11 of the upper housing 17a.

  The operation unit 14 includes an operation switch ◯ button 14a, a △ button 14b, a □ button 14c, and a x button 14d, a direction indicator switch cross key 14c, a start button 14h, a select button 14j, a side switch L button 14g, An R button 14f is included. The ○ button 14a, the Δ button 14b, the □ button 14c, and the x button 14d are installed on the right side of the second display 12 in the lower housing 17b. The cross key 14e is installed on the left side of the second display 12 in the lower housing 17b. The cross key 14e is used, for example, for command selection and player character movement. The L button 14f and the R button 14g are installed at the left end and the right end of the upper side of the lower housing 17b, and are used for predetermined instruction input as necessary.

  Although not shown in FIG. 1, a touch panel is provided on the upper surface of the second display 12. The touch panel detects the coordinate position by pressing with a stick or a finger or moving the stick.

  On the side surface on the upper side of the lower housing 17b, there is provided a cartridge insertion portion into which a cartridge 16 as a storage medium storing a game program can be inserted. A connector 28 for connecting to the cartridge 16 is built in the cartridge insertion portion.

  Next, the circuit configuration of the game apparatus 1 will be described. FIG. 2 is a block diagram showing the configuration of the game apparatus 1. A CPU core 21 is mounted on the electronic circuit board housed in the housing 17. The CPU core 21 includes a working RAM (WRAM) 22, a first graphic processing unit (first GPU) 24, a second graphic processing unit (second GPU) 26, an input / output interface (I / F) circuit 27, and a connector 28. It is connected. The CPU core 21 can be connected to the cartridge 16 via the connector 28. The CPU core 21 includes a ROM that stores system programs and an internal timer. The I / F circuit 27 is a circuit that exchanges data between the CPU core 21 and an external input / output device such as the touch panel 13, the operation unit 14, and the speaker 15.

  The cartridge 16 is a storage medium that stores a game program, and includes a ROM 16a that stores the game program and a RAM 16b that can rewrite backup data. The game program stored in the ROM 16 a of the cartridge 16 is loaded into the WRAM 22, and the loaded game program is executed by the CPU core 21. Temporary data obtained by the CPU core 21 executing the game program and data for generating an image are stored in the WRAM 22.

  The first GPU 24 and the second GPU 26 are game images based on data stored in the WRAM 22 in units of frames (for example, 1/30 second units or 1/60 second units) in accordance with an instruction from the CPU core 21. Is generated and drawn in the first VRAM 23 and the second VRAM 25. The first GPU 24 and the second GPU 26 display the game images drawn on the first VRAM 23 and the second VRAM 25 on the first display 11 and the second display 12 in accordance with an instruction from the CPU core 21.

  At least one of the first display 11 and the second display 12 is a 3D display using a parallax barrier method. In the first display 11 and the second display 12, liquid crystal slits extending in the shape of slits in the vertical direction are arranged as parallax barriers, and light from the backlight is blocked by a plurality of liquid crystal slits so that the right eye and the left eye The light passing through different pixels can be seen.

  In response to an instruction from the CPU core 21, the first GPU 24 or the second GPU 26 generates a game image having a parallax for left eye and right eye for each frame, and the first VRAM 23 or the second VRAM 25 stores the left and right eye images. A stereoscopic image in which pixels of the game image are alternately arranged in the vertical direction is drawn in units of two frames. When the stereoscopic image is displayed on the liquid crystal panel in a state where the parallax barrier by the liquid crystal slit is turned on, the object in the game can be stereoscopically viewed.

  The wireless communication device 29 is connected to a communication network via a wireless communication port, and can communicate with other game devices and server devices via the Internet. Further, it is possible to communicate with other game devices and server devices wirelessly via a communication unit having an antenna.

  Next, the outline of the present invention will be described. FIG. 3 is a diagram illustrating a relationship among the virtual camera, the target object, and the 3D screen surface in the game device according to the embodiment of the present invention. FIG. 3 is a diagram illustrating a case where the virtual camera 30 is viewed from a height direction perpendicular to the ground of the virtual space when the virtual camera 30 is moving while following the movement of the target object 31 such as a player character. It is. The 3D screen surface 32 is a plane orthogonal to a line segment connecting the virtual camera 30 and the target object 31.

  The object 33b closer to the target object 31 than the 3D screen surface 32 appears to have a small parallax between the left-eye image and the right-eye image, and the object 33a closer to the virtual camera 30 than the 3D screen surface 32 The parallax between the image for the left eye and the image for the right eye is large, and the image appears to protrude from the screen in three dimensions. As a method of providing parallax between the left-eye image and the right-eye image of the object 33a, a method of performing rendering based on two virtual cameras 30 having different left and right positions in a direction parallel to the 3D screen surface 32 is used. Be taken.

  In addition, in order to make the 3D display of the game screen realistic, the ratio of (distance between virtual camera and target object) / (distance between virtual camera and 3D screen surface) must be within a certain range. Here, it is assumed that this ratio is a / b = P. Therefore, in order to realize realistic 3D display, it is necessary to change the distance between the virtual camera 30 and the 3D screen surface 32 according to the distance between the virtual camera 30 and the target object 31.

  For example, description will be made assuming that a / b is 2/1. FIG. 3A shows a normal state in which no event has occurred, the distance between the virtual camera 30 and the target object 31 is 4 m, and the distance between the virtual camera 30 and the 3D screen surface 32 is 2 m. ing. Even if the target object 31 moves, this distance is maintained unless an event occurs.

  When an event occurs in which the distance between the virtual camera 30 and the target object 31 changes, the position of the target object 31 remains unchanged as shown in FIG. 3B, and the virtual camera 30 moves backward by 3 mm. In this case, the distance between the virtual camera 30 and the target object 31 is 7 m. Even if the position of the virtual camera 30 is moved, as shown in FIG. 3D, the position of the 3D screen surface 32 is immediately at a position where the distance from the virtual camera 30 is 3.5 m (referred to as a reference position). Instead of switching, as shown in FIG. 3 (b), it finally moves to the reference position from the position before the event occurrence through the situation shown in FIG. 3 (c). The 3D screen surface 32 moves in units of two frames. The reference position here. The distance between the virtual camera and the 3D screen when the ratio of (distance between the virtual camera and the target object) / (distance between the virtual camera and the 3D screen) is a predetermined a / b.

  When the distance between the virtual camera 30 and the target object 31 is changed, the distance between the virtual camera 30 and the 3D screen surface 32 is 5 m as shown in FIG. 3B. From here, the 3D screen surface 32 gradually moves through a distance of 1.5 m to the reference position.

  In this case, when the ratio of the distance between the virtual camera after the change and the 3D screen surface and the (distance between the virtual camera and the target object) / (distance between the virtual camera and the 3D screen surface) is a predetermined a / b. The 3D screen surface 32 so that the difference between the reference distance, which is the distance between the virtual camera and the 3D screen surface, becomes a predetermined ratio R of the difference between the distance between the virtual camera before the change and the 3D screen surface and the reference distance. The position of can be changed. For example, if the predetermined ratio R is 1/2, the distance of 1.5 m is moved by 0.75 m in the first two frames, and further moved by 0.375 m in the next two frames. Become.

  When the 3D screen surface 32 is moved and the distance to the reference position of the 3D screen surface 32 becomes shorter than a predetermined distance (for example, 0.5 m), the 3D screen is not related to the predetermined ratio R. The surface 32 is moved to the target reference position.

  It is also possible to set the movement of the 3D screen surface 32 within a predetermined frame after the distance between the virtual camera 30 and the target object 31 changes. For example, when the movement of the 3D screen surface is set to be completed within 8 frames after the distance between the virtual camera 30 and the target object 31 changes, the 3D screen surface 32 in the 5th and 6th frames is set. Regardless of the position, the 3D screen surface 32 moves to the reference position in the seventh and eighth frames.

  Next, a 3D screen surface management table used in the game device of the present invention will be described. FIG. 4 is a diagram illustrating a 3D screen surface management table in the game device according to the embodiment of the present invention. The 3D screen surface management table 40 is set in the WRAM 22 and has a distance (distance A) 41 between the virtual camera and the target object, a distance (distance B ′) 42 between the virtual camera and the 3D screen surface, and a predetermined value P. The reference distance (distance B) 43 between the virtual camera and the 3D screen surface and the number of frames 44 after the distance 41 between the virtual camera and the target object are stored are stored.

  When an event serving as a trigger for changing the distance between the virtual camera 30 and the target object 31 occurs, the distance A41 and the distance B are updated, and the number of frames 44 is also reset. The number of frames 44 starts from 0. The distance B'42 is updated every time the 3D screen surface 32 moves.

  Hereinafter, the case where the virtual camera 30 follows the target object 31 such as a player character and the virtual space is displayed will be described as an example. FIG. 5 is an example of a flowchart for the moving process of the 3D screen surface according to the embodiment of the present invention. Even if the target object 31 moves, the distance between the target object 31 and the virtual camera 30 is normally maintained, but the player character uses powerful magic, an explosion occurs in the immediate vicinity of the player character, Alternatively, when a specific event occurs depending on the operation of the player or the progress of the game, such as when the enemy character is aimed at the attack (step S1), the distance between the virtual camera 30 and the target object 31 (player character) changes. (Step S2).

  The specific event serving as a trigger for changing the distance between the virtual camera 30 and the target object 31 in step S1 is not limited to these, and can be set as appropriate according to the game genre and concept. is there. Further, the distance between the virtual camera 30 after the change in step S2 and the target object 31 is determined according to the event that occurred in step S1, and the virtual camera 30 after the change and the target object are changed depending on the type of the event. The distance of 31 can also be set to be different.

により求めることができる。ただし、算定された距離Ｂが、仮想カメラ３０と３Ｄスクリーン面３２との距離のとりうる最大値を超えている場合は、その最大値が、最終的な仮想カメラ３０と３Ｄスクリーン面３２との距離になる。 Next, based on the distance A between the virtual camera 30 and the target object 31, a ratio of (distance between the virtual camera and the target object) / (distance between the virtual camera and the 3D screen surface) becomes a predetermined value P. The distance B between the virtual camera 30 and the 3D screen surface 32 is specified, and the 3D screen surface management table 40 is updated (step S3). Specifically, the following formula:

It can ask for. However, when the calculated distance B exceeds the maximum value that the distance between the virtual camera 30 and the 3D screen surface 32 can take, the maximum value is determined by the final virtual camera 30 and the 3D screen surface 32. Become a distance.

  Next, the position of the 3D screen surface 32 after 2 frames is determined based on the 3D screen surface management table 40 according to the change in the distance between the virtual camera 30 and the target object 31 (step S4). Specific processing will be described later. When the position of the 3D screen surface 32 is determined in step S4, the movement of the 3D screen surface 32 to the determined position is executed (step S5), and the virtual camera 30 and the 3D screen surface of the 3D screen surface management table 40 are used. The distance A to 32 is updated (step S6).

  Then, it is determined whether or not the 3D screen surface 32 has moved to a reference position where a ratio of (distance between the virtual camera and the target object) / (distance between the virtual camera and the 3D screen surface) is a predetermined value P. Performed (step S7). If the 3D screen surface 32 has moved to the reference position (YES in step S7), the moving process of the 3D screen surface 32 ends. On the other hand, if the 3D screen surface 32 has not moved to the reference position (NO in step S7), the position on the 3D screen surface 32 in the next frame is determined in step S4.

  A series of processing from step S4 to S7 is repeatedly executed for each frame until it is determined in step S7 that the 3D screen surface 32 has moved to the reference position.

  Next, the position determination process of the 3D screen surface 32 in step S4 will be described. FIG. 6 is an example of a flowchart for the position determination process of the 3D screen surface according to the embodiment of the present invention. First, based on the 3D screen surface management table 40, whether or not the current frame subject to processing is within a predetermined frame after the distance between the virtual camera 30 and the target object 31 is changed in step S1. Is determined (step S41). The number of frames within which the movement of the 3D screen surface 32 is completed after the distance between the virtual camera 30 and the target object 31 changes is not particularly limited and can be set as appropriate.

  If the next two frames are within a predetermined frame after the distance between the virtual camera 30 and the target object 31 changes (YES in step S41), the process proceeds to step S42. On the other hand, if the next two frames are not within a predetermined frame after the distance between virtual camera 30 and target object 31 changes (NO in step S41), (distance between virtual camera and target object) / (virtual camera The reference position at which the ratio of the distance to the 3D screen surface) becomes a predetermined value P is determined as the position of the 3D screen surface 32 in the next two frames (step S44), and the process ends.

  In step S42, the distance B′42 between the virtual camera and the 3D screen surface and (distance between the virtual camera and the target object) / (distance between the virtual camera and the 3D screen surface) stored in the 3D screen surface management table 40. It is determined whether or not the difference in the reference distance B is equal to or less than the predetermined distance when the ratio is a predetermined value P.

  If it is determined in step S42 that the distance is not less than the predetermined distance (NO in step S42), 3D in the next two frames is determined based on the position of 3D screen surface 32 in the previous two frames. The position of the screen surface 32 is determined (step S43), and the process ends. As described above, the position of the 3D screen surface 32 in step S43 approaches a predetermined position while changing the moving distance for each frame according to a predetermined ratio. The position of the 3D screen surface 32 can also be moved at a constant speed.

  As a result of the determination in step S42, if it is determined that the distance is equal to or less than the predetermined distance (YES in step S42), (distance between virtual camera and target object) / (distance between virtual camera and 3D screen surface) The reference position at which the ratio becomes the predetermined value P is determined as the position of the 3D screen surface 32 in the next two frames (step S44), and the process ends.

  When the 3D screen surface 32 moves as in the present invention, the display method varies depending on the position of the object 33. Next, with reference to FIG. 7, the difference in display due to the difference in the position of the object 33 will be described.

  FIG. 7 is a diagram illustrating temporal changes in the positional relationship between the virtual camera, the target object, and the 3D screen surface, and the display mode when the distance between the virtual camera and the target object is long. In FIG. 7A, the objects 33c to e having different positions exist in the virtual space, and the time change of the display mode is different for each object 33. FIG. 7B shows a change in display mode over time for the objects 33c to 33e, and represents that the time has passed as the object 33c moves to the right.

  In the case of the object 33c, even if an event occurs and the distance between the virtual camera 30 and the target object 31 changes, the object 33c always exists on the target object 31 side with respect to the 3D screen surface 32. As shown in FIG. 7 (b), it is displayed so that there is a depth continuously.

  In the case of the object 33d, an object that has not been displayed on the game screen before the occurrence of the event becomes a display target when the distance between the virtual camera 30 and the target object 31 changes due to the occurrence of the event. Immediately after the virtual camera 30 has moved backward, the position of the 3D screen surface 32 has not changed, and therefore the object 33d is located closer to the virtual camera 30 than the 3D screen surface 32, as shown in FIG. 7B. As shown, it is displayed so as to jump out three-dimensionally from the screen.

  However, since the 3D screen surface 32 moves backward with the passage of time, the object 33d is present closer to the target object 31 than the 3D screen surface 32 at a certain point in time. Therefore, immediately after the virtual camera 30 moves backward, the object 33d is displayed with a depth from a certain point even if it is displayed so as to pop out from the screen. In this way, the object 33d that is behind the 3D screen surface 32a before the movement and ahead of the 3D screen surface 32b after the movement is projected from the screen as the position of the virtual camera 30 changes. It is displayed, and the display with depth is displayed as time passes. When such a display is performed, the fact that the virtual camera 30 has moved backward is emphasized by the object 33d being displayed so as to jump out of the screen instantaneously, and the change in the situation in the game can be further enhanced. You can make it feel real. In addition, since the display becomes deep after that, the game screen can be displayed without a sense of incongruity.

  In the case of the object 33e, an object that has not been displayed on the game screen before the occurrence of the event becomes a display target when the distance between the virtual camera 30 and the target object 31 changes due to the occurrence of the event. Although the position of the 3D screen surface 32 changes with the passage of time, the object 33e always exists on the virtual camera 30 side with respect to the 3D screen surface 32, and thus appears to pop out continuously.

  However, as the position of the 3D screen surface 32 moves, the magnitude of the parallax also changes stepwise. If the distance between the virtual camera 30 and the target object 31 is changed, the distance between the virtual camera 30 and the 3D screen surface 32 is long, and the parallax provided in the left-eye image and the right-eye image of the object 33e is not so large. However, as the distance of the 3D screen surface 32 approaches the virtual camera 30, the parallax increases. Accordingly, since the magnitude of the parallax changes step by step, the human vision can easily follow the change, and 3D display can be performed without causing discomfort and discomfort.

  In the above embodiment, the case where the present invention is applied mainly to action games has been described. However, the present invention is applicable to games in various fields such as fighting games, shooting games, racing games, sports games, role playing games, and simulation games. It is possible to apply.

DESCRIPTION OF SYMBOLS 1 Game device 11 1st indicator 12 2nd indicator 13 Touch panel 14 Operation part 15 Speaker 16 Cartridge 17 Housing 21 CPU core 22 WRAM
23 First VRAM
24 1st GPU
25 Second VRAM
26 Second GPU
27 I / F circuit 28 Connector 29 Wireless communication device 30 Virtual camera 31 Target object 32 3D screen surface 33 Object 40 3D screen surface management table

Claims (7)

A game apparatus that has a 3D display with a parallax barrier and displays a stereoscopic image with parallax for an object existing in a virtual space for each frame, thereby enabling stereoscopic viewing of a game screen. ,
3D screen surface setting means for setting a 3D screen surface perpendicular to a line segment connecting a virtual camera and a target object that the virtual camera follows;
Distance changing means for changing the distance between the virtual camera and the target object according to the progress of the game;
When the distance between the virtual camera and the target object is changed by the distance changing means, the ratio of (distance between the virtual camera and the target object) / (distance between the virtual camera and the 3D screen surface) becomes a predetermined value. 3D screen surface position adjusting means for adjusting the position of the screen surface;
Image generation for generating a stereoscopic image with no parallax for an object located farther from the virtual camera than the 3D screen surface and for an object located closer to the virtual camera than the 3D screen surface Means,
Display means for displaying a stereoscopic image generated by the image generation means on a 3D display,
The 3D screen surface position adjustment means moves the position of the 3D screen surface stepwise until the ratio of (distance between virtual camera and target object) / (distance between virtual camera and 3D screen surface) reaches a predetermined value. A game apparatus characterized by causing the game apparatus to play. Distance storage means for storing the distance between the virtual camera and the 3D screen surface;
A distance updating means for updating the distance between the virtual camera stored in the distance storage means and the 3D screen surface each time the distance between the virtual camera and the 3D screen surface changes;
3D screen surface position adjustment means,
The virtual camera and the 3D when the ratio of the distance between the virtual camera and the 3D screen surface after the change and the (distance between the virtual camera and the target object) / (the distance between the virtual camera and the 3D screen surface) is a predetermined value. The position of the 3D screen surface is set such that the difference from the reference distance, which is the distance from the screen surface, is a predetermined ratio of the difference between the distance between the virtual camera stored in the distance storage means and the 3D screen surface and the reference distance. The game device according to claim 1, wherein the game device is moved. When the difference between the distance between the virtual camera stored in the distance storage unit and the 3D screen surface and the reference distance is equal to or less than a predetermined distance, the 3D screen surface position adjusting unit The game apparatus according to claim 2, wherein the 3D screen surface is moved to a position where a ratio of (distance between the target object) and (distance between the virtual camera and the 3D screen surface) becomes a predetermined value. After the distance between the virtual camera and the target object is changed by the distance changing means, the 3D screen surface position adjusting means is within a predetermined frame (distance between the virtual camera and the target object) / (virtual camera and 3D screen surface 4. The game apparatus according to claim 1, wherein the position of the 3D screen is moved so that a ratio of the distance of the second distance becomes a predetermined value. The maximum distance is set in advance for the distance between the virtual camera and the 3D screen surface.
The game apparatus according to claim 1, wherein the 3D screen surface position adjusting means moves the position of the 3D screen within the range of the maximum distance. It is executed in a game device that has a 3D display with a parallax barrier and displays a stereoscopic image with parallax for an object existing in a virtual space for each frame, thereby enabling stereoscopic viewing of the game screen. A game program,
Game device
3D screen surface setting means for setting a 3D screen surface perpendicular to a line segment connecting a virtual camera and a target object that the virtual camera follows;
Distance changing means for changing the distance between the virtual camera and the target object according to the progress of the game;
When the distance between the virtual camera and the target object is changed by the distance changing means, the ratio of (distance between the virtual camera and the target object) / (distance between the virtual camera and the 3D screen surface) becomes a predetermined value. 3D screen surface position adjusting means for adjusting the position of the screen surface;
Image generation for generating a stereoscopic image with no parallax for an object located farther from the virtual camera than the 3D screen surface and for an object located closer to the virtual camera than the 3D screen surface Means,
Function as display means for displaying the stereoscopic image generated by the image generation means on the 3D display;
The 3D screen surface position adjustment means moves the position of the 3D screen surface stepwise until the ratio of (distance between virtual camera and target object) / (distance between virtual camera and 3D screen surface) reaches a predetermined value. A game program characterized by being caused to run. It is executed in a game device that has a 3D display with a parallax barrier and displays a stereoscopic image with parallax for an object existing in a virtual space for each frame, thereby enabling stereoscopic viewing of the game screen. A game screen display method,
Setting a 3D screen surface perpendicular to a line segment connecting the virtual camera and the target object that the virtual camera follows;
Changing the distance between the virtual camera and the target object according to the progress of the game;
When the distance between the virtual camera and the target object changes, the position of the 3D screen surface so that the ratio of (distance between the virtual camera and the target object) / (distance between the virtual camera and the 3D screen surface) becomes a predetermined value. Adjusting steps,
Generating a stereoscopic image having no parallax for an object located farther from the virtual camera than the 3D screen surface and having a parallax for an object located closer to the virtual camera than the 3D screen surface; ,
Displaying the generated stereoscopic image on a 3D display,
The step of adjusting the position of the 3D screen surface is performed step by step until the ratio of (distance between virtual camera and target object) / (distance between virtual camera and 3D screen surface) reaches a predetermined value. A game screen display method characterized by moving a position.

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