JP7304701B2 - Game program, recording medium, game processing method - Google Patents

Description

The present invention relates to a game program, a recording medium on which the game program is recorded, and a game processing method.

Conventionally, in an image generation system that generates an image that can be seen from a virtual camera in an object space that is a virtual three-dimensional space, when an obstacle object enters between the player's viewpoint and the character, the player's field of view is blocked by the obstacle object, and an image processing technique is known that prevents the player from seeing the surroundings of the character.

For example, in Patent Document 1, when it is determined that the first object is behind the second object when viewed from the viewpoint, and the perspective-transformed image of the first object overlaps the perspective-transformed image of the second object, describes an image generation system in which a first object is visible from a viewpoint through a second object.

Japanese Patent No. 4707080

In the conventional technology described above, since transparency processing is performed on the entire object, the developer does not intend to show the object to the player, for example, the entire object such as a wall or fence is transparent and the other side can be seen. The image could have been displayed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a game program, a recording medium, and a game processing method that can prevent an image not intended by the developer from being displayed due to object transparency processing. With the goal.

To achieve the above object, the game program of the present invention comprises an information processing device comprising: an image generation processing unit that generates an image viewed from a virtual camera in a virtual three-dimensional space; a transparent object setting processing unit that sets a transparent object that exists over a range from the position of a first object arranged in a three-dimensional space to the position of the virtual camera; It functions as a transparency execution processing unit that executes transparency processing on a portion of a second object placed in a three-dimensional space that contacts the transparent object.

To achieve the above object, a recording medium of the present invention is a recording medium that records the above game program and is readable by an information processing device.

To achieve the above object, a game processing method according to the present invention is a game processing method executed by an information processing device, comprising the steps of generating an image viewed from a virtual camera in a virtual three-dimensional space; When generating the image, setting a transparent object existing over a range from the position of the first object arranged in the three-dimensional space to the position of the virtual camera; and generating the image. and performing transparency processing on a portion of a second object placed in the three-dimensional space that contacts the transparent object.

According to the game program and the like of the present invention, it is possible to prevent an image not intended by the developer from being displayed due to the transparent processing of the object.

1 is a system configuration diagram showing an example of the overall configuration of a game system according to one embodiment; FIG. 1 is a block diagram showing an example of a functional configuration of an information processing device; FIG. FIG. 4 is an explanatory diagram for explaining the arrangement of a virtual camera and each object; FIG. 4 is an explanatory diagram showing an example of a first collision determination object; FIG. 11 is an explanatory diagram showing an example of a second object for collision determination; FIG. 4 is an explanatory diagram showing an example of the shape of a transparency object; 7 is a graph for explaining the curved shape of the transparent object shown in FIG. 6; FIG. 10 is an explanatory diagram showing another example of the shape of a transparent object; 9 is a graph for explaining the curved surface shape of the transparent object shown in FIG. 8; FIG. 11 is an explanatory diagram showing still another example of the shape of a transparent object; 11 is a graph for explaining the curved surface shape of the transparent object shown in FIG. 10; FIG. 10 is an explanatory diagram showing an example of a contact determination method when performing transparency processing; FIG. 10 is a diagram showing an example of an image when transparency processing is performed; 4 is a flowchart illustrating an example of a processing procedure executed by a CPU of an information processing device; FIG. 10 is an explanatory diagram for explaining a comparative example in which a transparent object having a shape whose diameter with respect to the optical axis increases from the virtual camera toward the player character is set; It is an example of the image by the virtual camera shown in FIG. FIG. 10 is an explanatory diagram for explaining the effect of the shape of the transparent object according to the embodiment; It is an example of the image by the virtual camera shown in FIG. FIG. 10 is an explanatory diagram showing an example of a contact determination method when performing transparency processing in a modified example in which the end faces of a transparent object are elliptical. FIG. 10 is a diagram showing an example of an image when transparency processing is executed in a modified example in which the end faces of the transparent object are elliptical. It is a block diagram showing an example of the hardware constitutions of an information processing apparatus.

An embodiment of the present invention will be described below with reference to the drawings.

<1. Overall Configuration of Game System>
First, an example of the overall configuration of a game system 1 according to this embodiment will be described with reference to FIG. As shown in FIG. 1 , the game system 1 has an information processing device 3 , a game controller 5 and a display device 7 . Each of the game controller 5 and the display device 7 is communicably connected to the information processing device 3 by wire or wirelessly.

The information processing device 3 is, for example, a stationary game machine. However, the present invention is not limited to this, and for example, a portable game machine integrally including an input section, a display section, and the like may be used. In addition to game machines, for example, server computers, desktop computers, notebook computers, tablet computers, etc., which are manufactured and sold as computers, smartphones, mobile phones, phablets, etc. As in the above, it may be manufactured and sold as a telephone.

The player uses the game controller 5 to perform various operational inputs. In the example shown in FIG. 1, the game controller 5 has, for example, a cross key 9, a plurality of buttons 11, and the like. Note that the game controller 5 may have, for example, a joystick or a touch pad instead of or in addition to the above.

<2. Overview of the game>
Next, an example of the outline contents of the game according to the present embodiment, that is, the game provided by executing the game program and the game processing method of the present invention by the information processing device 3 will be described.

In the game according to the present embodiment, a player character (an example of a first object) that can be operated by the player progresses through stages while moving on a game field that is a virtual three-dimensional space. In the virtual three-dimensional space, an image is generated that can be viewed from a virtual camera that has the player character as a subject and can be moved by the player's operation. A player character fights when encountering an enemy character. A large number of background objects (an example of a second object) that constitute the background of the player character and enemy characters are arranged on the game field.

It should be noted that the "first object" is not limited to, for example, a human character as in the present embodiment, but includes animals other than humans, creatures other than humans and animals, and virtual creatures (such as monsters, ghosts, etc.). monsters, etc.), robots, androids, and objects such as goods and objects.

In the game according to the present embodiment, even if a background object acting as an obstacle enters between the virtual camera and the player character, the background object is partially made transparent so that the player character cannot be seen from the player's field of view. To prevent. This content will be described in detail below.

<3. Functional Configuration of Information Processing Device>
Next, an example of the functional configuration of the information processing device 3 will be described with reference to FIGS. 2 and 3 to 13. FIG.

As shown in FIG. 2, the information processing device 3 includes an image generation processing unit 13, a first collision determination object setting processing unit 15, a second collision determination object setting processing unit 17, and a collision determination processing unit 19. , a transparency object setting processing unit 21 and a transparency execution processing unit 23 .

The image generation processing unit 13 generates an image seen from a virtual camera (viewpoint) in a virtual three-dimensional space. The virtual camera automatically moves so as to take the player character as a subject. In addition, by the player's operation, for example, it is possible to turn around the player character, change the direction of the camera, and move in the height direction or in the direction of approaching the player character.

The first collision determination object setting unit 15 sets a cuboid first collision determination object that exists over the range from the position of the player character to the position of the virtual camera. "Position of player character" is a reference position of the player character that is set for processing, and is, for example, the center position of the player character. However, it also includes specific parts of the player character (such as the face), the surface of the body, nearby positions, and the like. The “virtual camera position” is a reference position of the virtual camera (viewpoint) set for processing, and is, for example, the center position (optical axis position) of the lens of the virtual camera. However, it also includes a position near the virtual camera.

The first object for collision determination is a cuboid-shaped axis-aligned bounding box (AABB), and the normals of each surface of the cuboid are the X-axis, Y-axis, and Z-axis of the world coordinate system of the game field. It is set parallel to each of the axes. The first object for collision determination is set so as to include a capsule collision connecting, for example, the position of the player character and the position of the virtual camera.

The second collision determination object setting unit 17 sets a second collision determination object having a cuboid shape including a background object. Like the first object for collision determination, the second object for collision determination is an axis-parallel bounding box in the shape of a rectangular parallelepiped. It is set so as to be parallel to each of the Z-axes. Background objects of various shapes and sizes are arranged on the game field, and the second object for collision determination is set for each background object.

The collision determination processing unit 19 is configured to set the first collision determination object set by the first collision determination object setting processing unit 15 and the second collision determination object set by the second collision determination object setting processing unit 17. Whether or not there is a collision with the determination object is determined by a known collision determination method using an axis-parallel bounding box.

3 to 5 show examples of collision determination objects. FIG. 3 is an explanatory diagram for explaining the placement of the virtual camera and each object. In the example shown in FIG. 3, a player character 25, background objects such as a floor 27, walls 29, 31, 33, and a pillar 35, and a virtual camera 37 are arranged in a virtual three-dimensional space. The virtual camera 37 is arranged such that the optical axis 39 faces the reference position 41 of the player character 25 .

As shown in FIG. 4, the first collision determination object 43 exists over a range from a reference position 41 of the player character 25 to a reference position 45 of the virtual camera 37, and is positioned on each side of the rectangular parallelepiped. The normal lines are set so as to be parallel to the X-axis, Y-axis, and Z-axis of the world coordinate system 47, respectively.

As shown in FIG. 5, the second collision determination object 49 includes the pillar 35 as the background object, and the normals of the faces of the rectangular parallelepiped are the X axis and the Y axis of the world coordinate system 47. As shown in FIG. , Z-axis, respectively. Although not shown in FIG. 5, the second collision determination object may be set for the floor 27 and the walls 29, 31, and 33 other than the pillar 35. FIG.

Whether or not there is a collision between the first collision determination object 43 and the second collision determination object 49 set as described above is determined. Since the collision determination objects 43 and 49 are oriented in the same direction with respect to the world coordinate system 47, the collision determination process can be executed at high speed and the processing load can be greatly reduced.

Returning to FIG. 2, when generating an image by the virtual camera 37, the transparent object setting processing unit 21 sets the distance from the reference position 41 of the player character 25 placed in the three-dimensional space to the reference position 45 of the virtual camera 37. Sets a transparency object that spans the range. The transparent object is shaped so that the diameter of the optical axis 39 (an example of an axis) connecting the reference position 41 of the player character 25 and the reference position 45 of the virtual camera 37 increases from the player character 25 toward the virtual camera 37 . is set to More specifically, the transparent object is set so that the tip on the side of the player character 25 is pointed, and the diameter with respect to the optical axis 39 expands in a curved shape from the player character 25 toward the virtual camera 37. .

The transparency execution processing unit 23, when generating an image by the virtual camera 37, removes the portion of the background object placed in the three-dimensional space that contacts the transparent object set by the transparent object setting processing unit 21. Executes transparency processing on . At this time, the transparency execution processing unit 23 executes the transparency processing only for the colliding object corresponding to the second collision determination object 49 determined to have collided by the collision determination processing unit 19 described above.

Note that the “transparency processing” includes both processing for making transparent (transparency of 100%) and processing for semi-transparency (transparency of less than 100%). When making transparent, the corresponding pixels of the background object that should be drawn should not be drawn. In the case of semi-transparency, pixels to be drawn and pixels not to be drawn are arranged so as to have a proportion corresponding to the degree of transparency (so-called dithering). The transparency execution processing unit 23 executes transparency processing on the portion of the background object that is in contact with the transparent object so that the transparency increases as it approaches the optical axis 39 .

It should be noted that the determination of "the part of the background object that contacts the transparent object" may be strictly performed using information on the positions and shapes of both, but a simple method (described later) can be used to reduce the processing load. 12) may be employed. That is, it includes "a portion that is not in contact with the transparent object in a strict sense, but can be regarded as substantially in contact with the transparent object" by the simple method.

6 to 11 show examples of shapes of transparent objects. The transparent object 51 shown in FIG. 6 has a shape in which the diameter with respect to the optical axis 39 increases from the player character 25 toward the virtual camera 37, the tip on the player character 25 side is sharp, and the diameter with respect to the optical axis 39 is the diameter of the player character 25. It is set to have a shape that expands in a curved line from the character 25 toward the virtual camera 37 . The transparent object 51 has a circular end surface 55 perpendicular to the optical axis 39 at the end on the virtual camera 37 side.

FIG. 7 is a graph for explaining the curved shape of the transparent object 51 shown in FIG. The curve shown in FIG. 7 is a curved surface when the transparent object 51 is viewed in a cross section including the Z axis in the camera coordinate system 53 of the virtual camera 37 (the origin is the reference position 45 and the Z axis coincides with the optical axis 39). represents the shape. In other words, the transparent object 51 is a body of revolution generated by rotating the curve shown in FIG. 7, the horizontal axis x of the graph represents the ratio of the distance from the tip (reference position 41) of the transparent object 51 on the side of the player character 25 to the edge face 55 on the side of the virtual camera 37. When x=0, the tip The position (reference position 41), x=1, is the center position of the end face 55. FIG. The vertical axis y of the graph is the value by which the radius of the end face 55 is multiplied.

The curve shown in FIG. 7 is represented by the following function h(x), for example.
f(x)=-x+1
g(x)= ^x2
h(x)=f(g(f(x)))
A similar curve can be generated by using log (logarithmic function), but the calculation load can be reduced by using the above function h(x).

When the shape of the transparent object 51 is used, the following effects are obtained. That is, since the tip of the transparent object 51 on the side of the player character 25 can be sharpened, background objects that are near the player character 25 but do not interfere with the display can be easily excluded from the object of transparency processing. In addition, since the transparent object 51 has a bulge compared to, for example, a shape that expands linearly, it does not interfere with the display of the player character 25, but it is likely to interrupt the camera image and cause a complicated field of view. Background objects at a short distance from 37 can be made transparent more easily. Therefore, the field of view of the virtual camera 37 can be improved.

Similarly, the transparent object 57 shown in FIG. is set to have a shape that expands in a curved line from the player character 25 toward the virtual camera 37 . The transparency object 57 has a circular end face 59 perpendicular to the optical axis 39 at the end on the virtual camera 37 side.

FIG. 9 is a graph for explaining the curved shape of the transparent object 57 shown in FIG. The transparency object 57 is a body of revolution generated by rotating the curve shown in FIG. 9 around the optical axis 39 .

The curve shown in FIG. 9 is represented by the following function g(x), for example.
g(x)= ^x2

When the shape of the transparent object 57 is used, the following effects are obtained. That is, since the tip of the transparent object 57 on the side of the player character 25 can be further sharpened, background objects that are near the player character 25 but do not interfere with the display are further excluded from the object of transparency processing. becomes easier. Therefore, the display of important information near the player character 25 can be prevented from being obstructed.

Similarly, the transparent object 61 shown in FIG. is set to have a shape that expands in a curved line from the player character 25 toward the virtual camera 37 . The transparent object 61 has a circular end face 63 perpendicular to the optical axis 39 at the end on the virtual camera 37 side.

FIG. 11 is a graph for explaining the curved shape of the transparent object 61 shown in FIG. The transparency object 61 is a body of revolution generated by rotating the curve shown in FIG. 11 around the optical axis 39 .

The curve shown in FIG. 11 is represented, for example, by the following function i(x).
i(x)=−2x ³ +3x ²

When the shape of the transparent object 61 is used, the effects of both the transparent objects 51 and 57 are obtained.

FIG. 12 shows an example of a contact determination method when performing transparency processing. The circles shown in FIG. 12 represent the shapes of the transparent objects 51 , 57 , 61 described above as viewed in a cross section at an arbitrary position perpendicular to the Z-axis of the camera coordinate system 53 . The radius a of the circle is obtained according to the Z-axis position by the functions h(x), g(x) and i(x) described above.

In FIG. 12, for example, pixel P1 is processed as follows. First, a perpendicular vector 65 is generated between the pixel P1 and the center line (optical axis 39) of the transparent object, and the length of the perpendicular vector 65 on the XZ plane in the camera coordinate system 53 is defined as X1. Y1 is calculated from the circle formula (x ² +y ² =a ² ) using the values. The value of Y1 is compared with the length L1 of the perpendicular vector 65, and if Y1 is greater than L1, transparency processing is executed. For pixel P1, Y1 is greater than L1, so pixel P1 undergoes a transparency process.

The processing for pixel P2 is also the same as above. First, a perpendicular vector 67 is generated between the pixel P2 and the center line (optical axis 39) of the transparent object, and the length of the perpendicular vector 67 on the XZ plane in the camera coordinate system 53 is defined as X2. Y2 is calculated from the circle formula (x ² +y ² =a ² ) using the values. Comparing the value of Y2 with the length L2 of the normal vector 67, Y2 is smaller than L2, so no transparency processing is performed on pixel P2.

FIG. 13 shows an example of an image when transparency processing is performed. In the example shown in FIG. 13, a pillar 35 exists between the player character 25 and the virtual camera 37, and the pillar 35 is partially translucent by the image processing described above. Translucency is performed so that the degree of transparency increases as the player character 25 approaches.

In addition, the processing and the like in each processing unit described above are not limited to these examples of sharing the processing, for example, processing may be performed by a smaller number of processing units (for example, one processing unit), Moreover, it may be processed by a further subdivided processing unit. The functions of the processing units described above are implemented by a game program executed by the CPU 101 (see FIG. 21, which will be described later). may be implemented by an actual device such as an electrical circuit of

<4. Processing Procedure Executed by Information Processing Apparatus>
Next, an example of a processing procedure executed by the CPU 101 of the information processing device 3 will be described with reference to FIG. 14 .

In step S<b>10 , the image generation processing unit 13 of the information processing device 3 generates an image captured by the virtual camera 37 in a virtual three-dimensional space.

In step S<b>20 , the information processing device 3 uses the first collision determination object setting processing unit 15 to set the cuboid-shaped first collision determination object 43 between the player character 25 and the virtual camera 37 .

In step S<b>30 , the information processing device 3 uses the second collision determination object setting processing unit 17 to set the second collision determination object 49 having a cuboid shape including the background object.

In step S40, the information processing device 3 causes the collision determination processing unit 19 to determine the first collision determination object 43 set in step S20 and the second collision determination object 49 set in step S30. determines whether or not there is a collision. If there is no collision (step S40: NO), the process proceeds directly to step S70, which will be described later. On the other hand, if there is a collision (step S40: YES), the process proceeds to step S50.

In step S<b>50 , the information processing device 3 sets transparent objects 51 , 57 , 61 between the player character 25 and the virtual camera 37 using the transparent object setting processing section 21 .

In step S60, the information processing apparatus 3 causes the transparency execution processing unit 23 to perform transparency processing on portions of the background object that come into contact with the transparency objects 51, 57, and 61 set in step S50.

In step S70, the information processing device 3 determines whether or not the player has given an instruction to end the game. If the instruction to end the game has not been issued (step S70: NO), the process returns to step S10 and repeats the same procedure. On the other hand, if an instruction to end the game has been issued (step S70: YES), this flowchart ends.

Note that the above-described processing procedure is an example, and at least part of the above procedure may be deleted or changed, or procedures other than the above may be added. Moreover, the order of at least part of the above procedures may be changed, and a plurality of procedures may be combined into a single procedure.

<5. Effect of Embodiment>
The game program of the present embodiment includes the information processing device 3, the image generation processing unit 13 that generates an image that can be seen from the virtual camera 37 in a virtual three-dimensional space, and the A transparent object setting processing unit 21 for setting transparent objects 51, 57, and 61 existing over a range from the reference position 41 of the player character 25 to the reference position 45 of the virtual camera 37, when generating an image. , a transparency execution processing unit 23 for executing transparency processing on the portions of the background object 35 (pillar 35 in the above embodiment) placed in the three-dimensional space that are in contact with the transparent objects 51, 57, 61. .

As a result, even when the background object 35 as an obstacle enters between the virtual camera 37 and the player character 25, the background object 35 is partially made transparent to prevent the player character 25 from becoming invisible. At this time, not the entire background object 35 is made transparent, but only the necessary portion is made transparent, so that objects unintended by the developer can be prevented from being seen. In addition, since it is not necessary to divide the object into small pieces in order to avoid making the entire object transparent, it is possible to prevent an increase in development man-hours and costs.

In the present embodiment, the game program causes the information processing device 3 to operate as a cuboid-shaped first collision determination object existing over a range from the reference position 41 of the player character 25 to the reference position 45 of the virtual camera 37 . A first collision determination object setting processing unit 15 for setting an object 43, a second collision determination object setting processing unit 17 for setting a cuboidal second collision determination object 49 including a background object 35, a first It further functions as the collision determination processing unit 19 that determines whether or not there is a collision between the collision determination object 43 and the second collision determination object 49. The portions of the background object 35 corresponding to the collision determination object 49 in , which are in contact with the transparent objects 51, 57, and 61, are subjected to transparency processing.

In the present embodiment, the transparent processing is performed only for the background object 35 that has been determined to have collided by the collision determination. As a result, the background object 35 that does not hinder the display of the player character 25 is not made transparent, and only the background object 35 that becomes an obstacle can be made transparent. It can reduce the load. Further, since the collision judgment is performed by a so-called axis-parallel bounding box, the collision judgment processing can be executed at high speed and the processing load can be greatly reduced.

In this embodiment, the transparent object setting processing unit 21 also creates a transparent object whose diameter increases from the player character 25 toward the virtual camera 37 with respect to the optical axis 39 connecting the player character 25 and the virtual camera 37 . Set 51, 57, 61.

The effect of this will be described using a comparative example. FIG. 15 is an explanatory diagram for explaining an example of an arrangement in a comparative example in which a transparent object 69 having a shape whose diameter with respect to the optical axis 39 increases from the virtual camera 37 toward the player character 25 is set, and FIG. is an example of an image captured by the virtual camera 37 shown in FIG. In this case, as shown in FIGS. 15 and 16, there is a possibility that an object 71 (such as a treasure chest) that is near the player character 25 but does not obstruct the display of the player character 25 becomes transparent. Objects 73 (for example, pillars, walls, fences, etc.) at a short distance from the virtual camera 37 are not made transparent, and may interfere with the camera image as shown in FIG.

On the other hand, in the present embodiment, by setting the transparent objects 51, 57, and 61 (the transparent object 51 is representatively shown in FIG. 17) in the above-described shape, it is near the player character 25 but cannot be displayed. It becomes easy to exclude the object 71 which does not become an obstacle from the processing target of transparency. On the other hand, the object 73 at a short distance from the virtual camera 37, which is likely to interfere with the view of the player character 25 by interrupting the camera image even if it does not interfere with the display of the player character 25, is likely to be included in the transparent processing target. Become. As a result, as shown in FIG. 18, a good view of the camera can be ensured while avoiding transparentization of the object 71 that does not become an obstacle.

In this embodiment, the transparent object setting processing unit 21 has a shape whose tip on the player character 25 side is pointed and whose diameter with respect to the optical axis 39 expands in a curve from the player character 25 toward the virtual camera 37 . set the transparency objects 51, 57 and 61 of the .

By sharpening the tip of the transparent object 51, 57, 61 on the side of the player character 25, it becomes easier to exclude an object that is near the player character 25 but does not interfere with the display from the transparent processing target. Further, by making the diameters of the transparent objects 51 , 57 , and 61 expand in a curved shape toward the virtual camera 37 , especially in the case of the transparent objects 51 and 61 , they are located at a short distance from the virtual camera 37 . Objects can be made more transparent, giving the camera a better view.

Further, particularly in this embodiment, the transparency execution processing unit 23 performs transparency processing on portions of the background object 35 that are in contact with the transparent objects 51, 57, and 61 so that the degree of transparency increases as the distance to the optical axis 39 increases. Execute.

As a result, the visibility of the player character 25 can be ensured by increasing the transparency of the central portion of the visual field of the virtual camera 37 . Further, by gradually decreasing the transparency as the distance from the central portion of the field of view increases, the change in rendering of the background object 35 becomes continuous, as shown in FIG. It can obscure the boundary with the non-existent part. As a result, it is possible to prevent an unnatural transparent image (for example, an image in which an object has a gaping hole).

<6. Modifications, etc.>
It should be noted that the present invention is not limited to the above-described embodiments, and various modifications are possible without departing from the gist and technical idea of the present invention.

For example, the case where the end surface of the transparent object on the side of the virtual camera 37 is circular has been described above, but the shape of the end surface may be elliptical. In this modification, the transparent object setting processing unit 21 includes transparent objects 51A, 57A, and 61A (not shown) having elliptical end faces (not shown) perpendicular to the optical axis 39 at the end on the virtual camera 37 side. set.

FIG. 19 shows an example of a contact determination method when performing transparency processing in this modified example. The ellipses in FIG. 19 represent transparent objects 51A, 57A, and 61A obtained by extending the above-described transparent objects 51, 57, and 61 in the Y direction in the camera coordinate system 53 at arbitrary positions perpendicular to the Z axis of the camera coordinate system 53. It represents the shape seen in the cross section of The minor axis a and major axis b of the ellipse are determined by the above-mentioned functions h(x), g(x), i(x) (however, it is necessary to change the value of y according to the radius of the ellipse). Required according to location.

In FIG. 19, for example, pixel P3 is processed as follows. First, a perpendicular vector 75 is generated between the pixel P3 and the center line (optical axis 39) of the transparent object, and the length of the perpendicular vector 75 on the XZ plane in the camera coordinate system 53 is defined as X3. Y3 is calculated from the ellipse formula (x ² /a ² +y ² /b ² =1) using the values. The value of Y3 is compared with the length L3 of the perpendicular vector 75, and if Y3 is greater than L3, the transparency processing is executed. For pixel P3, Y3 is greater than L3, so pixel P3 undergoes a transparency process.

The processing for pixel P4 is also the same as above. First, a perpendicular vector 77 is generated between the pixel P4 and the center line (optical axis 39) of the transparent object. Y4 is calculated from the ellipse formula (x ² /a ² +y ² /b ² =1) using the values. Comparing the value of Y4 with the length L4 of the normal vector 77, Y4 is less than L4, so no transparency processing is performed on pixel P4.

FIG. 20 shows an example of an image when transparency processing is executed. In the example shown in FIG. 20 , the player character 25 and the enemy character 79 are in battle, and displayed side by side in the vertical direction as viewed from the virtual camera 37 . A pillar 35 exists between the player character 25 and the virtual camera 37, and the pillar 35 is translucent in an elliptical shape elongated in the vertical direction by the image processing described above. In particular, in a battle that progresses in real time, moment-by-moment judgments and operations by the player are important. There is a possibility that you will be disadvantaged in battle by missing the timing of a typical attack. According to this modification, it is possible to ensure the visibility of not only the player character 25 but also the enemy character 79, so that the above disadvantages can be prevented. Note that this modification is particularly effective when the positions of the player character 25 and the enemy character 79 on the screen are fixed by, for example, the function of locking on the enemy.

According to the above modified example, when the important information related to the player character 25 (the enemy character 79 in the above example) is displayed in a specific direction with respect to the player character 25, the display is long in the specific direction. By using an elliptical end face, it is possible to ensure the visibility of important information as well.

It should be noted that the present invention can be applied to various genres of games as long as it is a game in which another object sometimes enters between the virtual camera and the object, which is the subject. For example, the present invention can be applied to simulation games, role-playing games, action games, action role-playing games, fighting games, adventure games, and the like.

In addition to the methods already described above, the methods according to the above-described embodiments and modifications may be appropriately combined and used. In addition, although not exemplified one by one, the above-described embodiment and each modified example can be implemented with various modifications within the scope not departing from the spirit thereof.

<7. Hardware Configuration of Information Processing Device>
Next, with reference to FIG. 21, an example of the hardware configuration of the information processing device 3 that implements each processing unit implemented by the program executed by the CPU 101 and the like described above will be described.

As shown in FIG. 21, the information processing device 3 includes, for example, a CPU 101, a ROM 103, a RAM 105, a GPU 106, a dedicated integrated circuit 107 such as an ASIC or FPGA built for a specific application, and an input device 113. , an output device 115 , a recording device 117 , a drive 119 , a connection port 121 and a communication device 123 . These components are connected via a bus 109, an input/output interface 111, etc. so as to be able to transmit signals to each other.

A game program can be recorded in, for example, the ROM 103, the RAM 105, the recording device 117, or the like.

In addition, the game program is temporarily or permanently (non-temporarily) recorded on a removable recording medium 125 such as a magnetic disk such as a flexible disk, an optical disk such as various CDs, MO disks, and DVDs, and a semiconductor memory. You can also keep it. Such a recording medium 125 can also be provided as so-called package software. In this case, the game programs recorded on these recording media 125 may be read by the drive 119 and recorded on the recording device 117 via the input/output interface 111, the bus 109, or the like.

Also, the game program can be recorded in, for example, a download site, another computer, another recording device, or the like (not shown). In this case, the game program is transferred via a network NW such as LAN or Internet, and the communication device 123 receives this program. The program received by the communication device 123 may be recorded in the recording device 117 via the input/output interface 111, the bus 109, or the like.

Also, the game program can be recorded in an appropriate externally connected device 127, for example. In this case, the game program may be transferred via an appropriate connection port 121 and recorded in the recording device 117 via the input/output interface 111, bus 109, or the like.

Then, the CPU 101 executes various processes in accordance with the programs recorded in the recording device 117, so that the processes by the image generation processing section 13, the transparent object setting processing section 21, the transparency execution processing section 23, etc. are executed. Realized. At this time, the CPU 101 may, for example, directly read out the program from the recording device 117 and execute it, or may execute it after temporarily loading it into the RAM 105 . Further, when the CPU 101 receives a program via the communication device 123 , the drive 119 or the connection port 121 , for example, the received program may be directly executed without being recorded in the recording device 117 .

The CPU 101 may also perform various processing based on signals and information input from an input device 113 such as a mouse, keyboard, microphone, etc. (not shown) including the game controller 5 as necessary. good.

The GPU 106 performs processing for image display such as rendering processing in accordance with instructions from the CPU 101 .

Then, the CPU 101 and the GPU 106 output the result of executing the above processing from the output device 115 including the aforementioned display device 7 and audio output unit, for example. Furthermore, the CPU 101 and GPU 106 may transmit this processing result via the communication device 123 or the connection port 121 as necessary, or record it in the recording device 117 or recording medium 125 .

3 information processing device 13 image generation processing unit 15 first collision determination object setting processing unit 17 second collision determination object setting processing unit 19 collision determination processing unit 21 transparency object setting processing unit 23 transparency execution processing unit 25 player character (first object)
35 pillar (second object)
37 virtual camera 39 optical axis (axis)
41 reference position (position of first object)
43 First collision determination object 45 Reference position (virtual camera position)
49 second collision determination object 51 transparent object 57 transparent object 61 transparent object 125 recording medium

Claims (8)

information processing equipment,
an image generation processing unit that generates an image seen from a virtual camera in a virtual three-dimensional space;
a transparent object setting processing unit that sets a transparent object existing over a range from the position of a first object arranged in the three-dimensional space to the position of the virtual camera when generating the image;
When generating the image, a portion of a second object placed in the three-dimensional space that is in contact with the transparent object is subjected to a transparent processing , and a portion of the second object that is in contact with the transparent object is transparentized. a transparency execution processing unit that does not perform transparency processing on a portion that does not contact the
A game program that functions as the information processing device,
a first collision determination object setting unit that sets a first collision determination object having a collision determination that exists over a range from the position of the first object to the position of the virtual camera;
a second collision determination object setting unit that sets a second collision determination object that includes the second object and has collision determination ;
a collision determination processing unit that determines whether or not there is a collision between the first object for collision determination and the second object for collision determination;
function as
The transparency execution processing unit
executing the transparentization process on a portion of the second object corresponding to the second collision determination object determined to have collided, the portion being in contact with the transparent object;
The game program according to claim 1. The transparency object setting processing unit
setting the transparent object when it is determined that the collision has occurred, and not setting the transparent object when it is determined that the collision has not occurred;
The transparency execution processing unit
executing the transparency processing when it is determined that the collision has occurred, and not performing the transparency processing when it is determined that the collision has not occurred;
3. A game program according to claim 2 . The transparency object setting processing unit
setting the transparent object, which is a body of rotation whose rotation axis is an axis connecting the first object and the virtual camera, the curve monotonously increasing in the range from the first object to the virtual camera;
4. A game program according to any one of claims 1 to 3 . The transparency object setting processing unit
setting the transparent object having an elliptical end face perpendicular to an axis connecting the first object and the virtual camera at the end on the virtual camera side;
A game program according to any one of claims 1 to 4 . The transparency object setting processing unit
6. The game program according to claim 5, wherein when an enemy character is displayed in a specific direction with respect to said first object, said transparent object having said elliptical end face elongated in said specific direction is set. A recording medium readable by an information processing device, in which the game program according to any one of claims 1 to 6 is recorded. A game processing method executed by an information processing device, comprising:
generating an image viewed by a virtual camera in a virtual three-dimensional space;
setting a transparency object existing over a range from a position of a first object arranged in the three-dimensional space to a position of the virtual camera when generating the image;
When generating the image, a portion of a second object placed in the three-dimensional space that is in contact with the transparent object is subjected to a transparent processing , and a portion of the second object that is in contact with the transparent object is transparentized. a step of not performing transparency processing on portions that do not come into contact with
A game processing method comprising:

Images