JP2020116296A - Game program, recording medium, and game processing method - Google Patents

Abstract

To prevent an image unintended by a developer from being displayed due to a transparent processing of an object.SOLUTION: An information processing device 3 is functioned as: an image generation processing part 13 for generating an image seen from a virtual camera 37 within a virtual three-dimensional space; a transparency object setting processing part 21 for setting transparency objects 51, 57, 61 existing over a range from the reference position 41 of a player character 25 arranged within the three-dimensional space to the reference position 45 of the virtual camera 37 in generating the image; and a transparency execution processing part 23 for executing transparency processing of a part where a background object 35 arranged with the three-dimensional space is brought into contact with the transparency objects 51, 57, 61 in generating the image.SELECTED DRAWING: Figure 2

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 viewed from a virtual camera in an object space that is a virtual three-dimensional space, when an object that becomes an obstacle enters between the player's viewpoint and the character, the player's visual field is changed. There is known an image processing technology for preventing the player from being obscured by the obstacle object and hiding the periphery of the character from the player.

For example, in Patent Document 1, when the first object is determined to be behind the second object 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 that allows a first object to be seen from a viewpoint through a second object.

Japanese Patent No. 4707080

In the above-mentioned conventional technique, since the transparent processing is performed on the entire object, the developer is not intended to be shown to the player, for example, the entire object such as a wall or a fence is transparent and the other side is visible. The image might be displayed.

The present invention has been made in view of the above problems, and provides a game program, a recording medium, and a game processing method capable of preventing an image not intended by the developer from being displayed due to the transparent processing of an object. With the goal.

In order to achieve the above object, the game program of the present invention includes an information processing device, an image generation processing unit that generates an image viewed from a virtual camera in a virtual three-dimensional space, and when generating the image, A transparent object setting processing unit that sets 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; The second object arranged in the three-dimensional space is caused to function as a transparentization execution processing unit that executes a transparentization process on a portion that comes into contact with the transparentized object.

In order to achieve the above object, the recording medium of the present invention is a recording medium in which the game program is recorded and which can be read by an information processing device.

In order to achieve the above object, a game processing method of the present invention is a game processing method executed by an information processing device, the method comprising: generating an image viewed from a virtual camera in a virtual three-dimensional space; When generating an image, a step of 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 At this time, a step of performing a transparentization process on a portion of the second object arranged in the three-dimensional space that comes into contact with the transparentized 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.

It is a system configuration diagram showing an example of the overall configuration of a game system according to an embodiment. It is a block diagram showing an example of functional composition of an information processor. It is an explanatory view for explaining arrangement of a virtual camera and each object. It is explanatory drawing showing an example of the 1st collision determination object. It is an explanatory view showing an example of the 2nd collision judging object. It is explanatory drawing showing an example of the shape of a transparent object. 7 is a graph for explaining the curved surface shape of the transparentized object shown in FIG. 6. It is explanatory drawing showing the other example of the shape of a transparent object. 9 is a graph for explaining the curved surface shape of the transparentized object shown in FIG. 8. It is explanatory drawing showing the further another example of the shape of a transparent object. 11 is a graph for explaining the curved surface shape of the transparentized object shown in FIG. 10. It is explanatory drawing showing an example of the contact determination method at the time of performing a transparentization process. It is a figure showing an example of the image when a transparentization process is performed. 9 is a flowchart illustrating an example of a processing procedure executed by a CPU of the information processing device. It is an explanatory view for explaining a comparative example in which a transparent object having a shape in which a diameter with respect to an optical axis increases from a virtual camera toward a player character is set. It is an example of the image by the virtual camera shown in FIG. It is explanatory drawing for demonstrating the effect by the shape of the transparentized object of this embodiment. It is an example of the image by the virtual camera shown in FIG. It is explanatory drawing showing an example of the contact determination method at the time of performing a transparentization process in the modification which makes the end surface of a transparentized object elliptical. It is a figure showing an example of the image at the time of transparentization processing in the modification which makes an end face of a transparentization object into elliptical shape. It is a block diagram showing an example of hardware constitutions of an information processor.

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 the game system 1 according to the present embodiment will be described with reference to FIG. As shown in FIG. 1, the game system 1 includes 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 connected to the information processing device 3 in a wired or wireless manner so that they can communicate with each other.

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

The player uses the game controller 5 to perform various operation inputs. In the example shown in FIG. 1, the game controller 5 has, for example, a cross key 9 and a plurality of buttons 11. 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. Outline of game>
Next, an example of the outline content of the game according to the present embodiment, that is, the game provided by the game program and the game processing method of the present invention being executed by the information processing device 3 will be described.

In the game according to the present embodiment, a player character (one example of the first object) that can be operated by the player advances the stage while moving on the game field, which is a virtual three-dimensional space. In the virtual three-dimensional space, an image viewed from a virtual camera that is movable by the player's operation while the player character is the subject is generated. The player character fights when it encounters an enemy character. In the game field, a large number of background objects (an example of a second object) constituting the background of the player character and the enemy character are arranged.

Note that the “first object” is not limited to, for example, a human character as in the present embodiment, and may be an animal other than a human, a human or a non-animal creature, or a virtual creature (for example, a monster, ghost, Youkai, etc.), robots, androids, objects such as articles and objects, and the like.

In the game according to the present embodiment, even if a background object that becomes 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 view. To prevent. Hereinafter, this content will be described in detail.

<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.

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 transparentization object setting processing unit 21 and a transparentization execution processing unit 23.

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

The first collision determination object setting processing unit 15 sets the first collision determination object having a rectangular parallelepiped shape that exists over the range from the position of the player character to the position of the virtual camera. The “position of the player character” is a reference position of the player character that is set in processing, and is, for example, the center position of the player character. However, a specific part (for example, face) of the player character, the surface of the body, a nearby position, and the like are also included. The “position of the virtual camera” is a position that serves as a reference for the virtual camera (viewpoint) set in processing, and is, for example, the center position (position of the optical axis) of the lens of the virtual camera. However, the position near the virtual camera and the like are also included.

The first collision determination object is a rectangular parallelepiped axis-parallel bounding box (AABB: Axis-Aligned Bounding Box), and normals of each surface of the rectangular parallelepiped are X-axis, Y-axis, and Z-axis of the world coordinate system of the game field. It is set to be parallel to each of the axes. The first collision determination object is set so as to include, for example, a capsule collision that connects the position of the player character and the position of the virtual camera.

The second collision determination object setting processing unit 17 sets a second rectangular collision determination object including a background object. The second collision determination object, like the first collision determination object, is a rectangular parallelepiped box-shaped bounding box, and the normals of each surface of the rectangular parallelepiped are the X axis and the Y axis of the world coordinate system of the game field. It is set to be parallel to each of the Z axes. Although various background objects of various shapes are arranged in the game field, the second collision determination object is set for each background object.

The collision determination processing section 19 includes a first collision determination object set by the first collision determination object setting processing section 15 and a second collision set by the second collision determination object setting processing section 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 an example of a collision determination object. FIG. 3 is an explanatory diagram for explaining the arrangement of the virtual camera and each object. In the example shown in FIG. 3, a player character 25, background objects such as the floor 27, walls 29, 31, 33, and pillars 35, and a virtual camera 37 are arranged in a virtual three-dimensional space. The virtual camera 37 is arranged so 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 in the range from the reference position 41 of the player character 25 to the reference position 45 of the virtual camera 37, and on each surface of the rectangular parallelepiped. The normal is set to be parallel to each of the X axis, Y axis, and Z axis of the world coordinate system 47.

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

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 have the same orientation with respect to the world coordinate system 47, the collision determination processing can be executed at high speed and the processing load can be significantly reduced.

Returning to FIG. 2, the transparentized object setting processing unit 21 generates the image by the virtual camera 37, from the reference position 41 of the player character 25 arranged in the three-dimensional space to the reference position 45 of the virtual camera 37. Sets a transparent object that exists over the range. The transparent object has such a shape that the diameter with respect to the optical axis 39 (an example of the 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 transparentized object is set such that the tip on the player character 25 side is sharp 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 transparentization execution processing unit 23 is a portion of the background object arranged in the three-dimensional space that is in contact with the transparentized object set by the transparentized object setting processing unit 21 when the image is generated by the virtual camera 37. The transparency process is executed. At this time, the transparency execution processing unit 23 executes the transparency processing only on the collision object corresponding to the second collision determination object 49 determined to have a collision by the above-described collision determination processing unit 19.

The "transparency treatment" includes both a treatment for making transparency (transparency 100%) and a treatment for making it semitransparent (transparency less than 100%). When making it transparent, the corresponding pixel of the originally drawn background object is not drawn. In the case of semi-transparency, pixels to be drawn and pixels to be not drawn are arranged so as to have a ratio according to transparency (so-called dithering). The transparency execution processing unit 23 performs a transparency process on a portion of the background object that comes into contact with the transparency object so that the transparency becomes higher as it approaches the optical axis 39.

It should be noted that the determination of the “portion of the background object that comes into contact with the transparentized object” may be made strictly using information on the positions and shapes of both, but a simple method (described later) to reduce the processing load. 12) may be adopted. That is, it is assumed to include “a portion which is not in contact with the transparentized object in a strict sense but which can be regarded as being in contact with the transparentized object” by the simple method.

6 to 11 show examples of the shape of the transparentized object. 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 player. The character 25 is set to have a curved shape that expands toward the virtual camera 37. The transparentized 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 surface shape of the transparentized object 51 shown in FIG. The curved line 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 (where the reference position 45 is the origin and the Z axis coincides with the optical axis 39). Shows the shape. In other words, the transparentized object 51 is a rotating body generated by rotating the curve shown in FIG. 7 around the optical axis 39. In FIG. 7, the horizontal axis x of the graph represents the ratio of the distance from the tip of the transparentized object 51 on the player character 25 side (reference position 41) to the end surface 55 on the virtual camera 37 side, where x=0. At the position (reference position 41), x=1, the center position of the end face 55 is obtained. The vertical axis y of the graph is a value by which the radius of the end surface 55 is multiplied.

The curve shown in FIG. 7 is represented by, for example, the function h(x) of the following equation.
f(x)=-x+1
g(x)=x ²
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 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, it becomes easy to exclude a background object near the player character 25 that does not hinder the display from the target of the transparent processing. Further, since the transparent object 51 has a bulge as compared with the case where the transparent object 51 has a shape that linearly expands, it does not hinder the display of the player character 25, but it is easy to interrupt the camera image and complicate the visibility. It becomes easier to make the background object closer to 37 more transparent. Therefore, the visibility of the virtual camera 37 can be improved.

Similarly, the transparent object 57 shown in FIG. 8 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, and the tip on the side of the player character 25 is sharp and the diameter with respect to the optical axis 39. Is set so as to have a shape that expands in a curved shape from the player character 25 toward the virtual camera 37. The transparentized object 57 has a circular end surface 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 surface shape of the transparentized object 57 shown in FIG. The transparent object 57 is a rotating body generated by rotating the curve shown in FIG. 9 around the optical axis 39.

The curve shown in FIG. 9 is represented by, for example, a function g(x) of the following equation.
g(x)=x ²

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 player character 25 side can be further sharpened, the background object that is near the player character 25 but does not hinder the display is further excluded from the target of the transparent processing. It will be easier. Therefore, it is possible to prevent the display of important information near the player character 25 from being hindered.

Similarly, the transparent object 61 shown in FIG. 10 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, and the tip end on the player character 25 side is sharp and the diameter with respect to the optical axis 39. Is set so as to have a shape that expands in a curved shape from the player character 25 toward the virtual camera 37. The transparentized object 61 has a circular end surface 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 surface shape of the transparentized object 61 shown in FIG. The transparent object 61 is a rotating body generated by rotating the curve shown in FIG. 11 around the optical axis 39.

The curve shown in FIG. 11 is represented by, for example, the function i(x) of the following equation.
^{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 can be obtained.

FIG. 12 shows an example of a contact determination method when executing the transparency processing. The circle shown in FIG. 12 represents the shape of the above-described transparent objects 51, 57, 61 as seen 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 above-mentioned functions h(x), g(x), i(x).

In FIG. 12, for example, the process for the pixel P1 is performed as follows. First, a perpendicular vector 65 is generated between the pixel P1 and the center line (optical axis 39) of the transparentized object, and the length of the perpendicular vector 65 on the XZ plane in the camera coordinate system 53 is set to X1. Using the value, Y1 is calculated from the circle formula (x ² +y ² =a ² ). The value of Y1 is compared with the length L1 of the perpendicular vector 65, and when Y1 is larger than L1, the transparency processing is executed. In the case of the pixel P1, since Y1 is larger than L1, the pixel P1 is subjected to the transparency processing.

The process for the pixel P2 is similar to the 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 set to X2. Using the values, Y2 is calculated from the circle formula (x ² +y ² =a ² ). Comparing this value of Y2 with the length L2 of the perpendicular vector 67, since Y2 is smaller than L2, the pixel P2 is not subjected to the transparency processing.

FIG. 13 shows an example of an image when the transparency processing is executed. 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 made semitransparent by the above-described image processing. The translucency is performed so that the transparency becomes higher as the player character 25 is approached.

Note that the processing and the like in each processing unit described above is not limited to an example of sharing of these processing, and may be processed by a smaller number of processing units (for example, one processing unit), In addition, 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 a CPU 101 (see FIG. 21 described later) described later. For example, some of them are dedicated integrated circuits such as ASIC and FPGA, and others. It may be implemented by an actual device such as an electric circuit of.

<4. Processing procedure executed by information processing device>
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.

In step S10, the information processing device 3 causes the image generation processing unit 13 to generate an image by the virtual camera 37 in the virtual three-dimensional space.

In step S20, the information processing apparatus 3 sets the first collision determination object 43 between the player character 25 and the virtual camera 37 by the first collision determination object setting processing unit 15.

In step S30, the information processing apparatus 3 sets the second collision determination object 49 having a rectangular parallelepiped shape including the background object by the second collision determination object setting processing unit 17.

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

In step S50, the information processing device 3 sets the transparent objects 51, 57, 61 between the player character 25 and the virtual camera 37 by the transparent object setting processing unit 21.

In step S60, the information processing device 3 causes the transparency execution processing unit 23 to perform the transparency process on the portion of the background object that comes into contact with the transparency objects 51, 57, 61 set in step S50.

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

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

<5. Effect of Embodiment>
The game program of the present embodiment arranges the information processing device 3 in the three-dimensional space when generating the image, the image generation processing unit 13 that generates an image viewed from the virtual camera 37 in the virtual three-dimensional space. The transparent object setting processing unit 21 that sets the transparent objects 51, 57, 61 existing in the 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. The background object 35 (the pillar 35 in the above embodiment) arranged in the three-dimensional space is caused to function as a transparentization execution processing unit 23 that executes a transparentization process on a portion in contact with the transparentization objects 51, 57, 61. ..

As a result, even if the background object 35, which is an obstacle, enters between the virtual camera 37 and the player character 25, the background object 35 can be partially made transparent to prevent the player character 25 from becoming invisible. At this time, the entire background object 35 is not made transparent, but only the necessary portion is made transparent, so that it is possible to prevent an object or the like not intended by the developer from being seen. Further, 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 the development man-hours and costs from increasing.

Further, particularly in the present embodiment, the game program uses the information processing device 3 for the first collision determination of the rectangular parallelepiped shape existing over the range from the reference position 41 of the player character 25 to the reference position 45 of the virtual camera 37. The first collision determination object setting processing unit 15 that sets the object 43, the second collision determination object setting processing unit 17 that sets the rectangular parallelepiped second collision determination object 49 that includes the background object 35, The collision determination processing unit 19 that determines whether there is a collision between the collision determination object 43 and the second collision determination object 49 further functions, and the transparency execution processing unit 23 determines that there is a collision. The transparentization processing is executed on the portion of the background object 35 corresponding to the collision determination object 49 of FIG.

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

Further, particularly in the present embodiment, the transparent object setting processing unit 21 has a shape in which the diameter of the optical axis 39 connecting the player character 25 and the virtual camera 37 increases from the player character 25 toward the virtual camera 37. 51, 57 and 61 are set.

The effect by this is demonstrated using a comparative example. FIG. 15 is an explanatory diagram for explaining an example of the arrangement in the comparative example in which the transparent object 69 having the shape in which the 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 taken 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 (for example, a treasure box or the like) that is near the player character 25 but does not hinder the display of the player character 25 may be made transparent. In addition, the object 73 (for example, a pillar, a wall, a fence, etc.) located at a short distance from the virtual camera 37 is not made transparent, and it may interrupt the camera image as shown in FIG.

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

Further, particularly in the present embodiment, the transparent object setting processing unit 21 has a shape in which the tip on the player character 25 side is sharp and the diameter with respect to the optical axis 39 is expanded in a curved shape from the player character 25 toward the virtual camera 37. The transparent objects 51, 57, and 61 are set.

By sharpening the tips of the transparent objects 51, 57, 61 on the player character 25 side, it becomes easier to exclude objects that are near the player character 25 but do not obstruct the display from the target of the transparent processing. Further, by making the diameters of the transparentized objects 51, 57, 61 expand in a curved shape toward the virtual camera 37, the transparentized objects 51, 61 are close to the virtual camera 37 in particular. The object can be made more transparent, and the field of view of the camera can be improved.

Further, particularly in the present embodiment, the transparency execution processing unit 23 performs the transparency process on the portions of the background object 35 that come into contact with the transparency objects 51, 57, and 61 so that the transparency increases as the optical axis 39 is approached. Execute.

Accordingly, the transparency of the central portion of the field of view of the virtual camera 37 can be increased to ensure the visibility of the player character 25. In addition, by gradually decreasing the transparency as the distance from the central part of the field of view is changed, the drawing of the background object 35 is continuously changed, and the part where the translucency is executed is executed. The boundary with the non-existing part can be obscured. As a result, it is possible to prevent a transparent image that looks unnatural (for example, an image in which an object has holes).

<6. Modifications>
The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit and technical idea of the present invention.

For example, although the case where the end surface of the transparentized object on the virtual camera 37 side is circular has been described above, the shape of the end surface may be elliptical. In the present modification, the transparentized object setting processing unit 21 has transparentized objects 51A, 57A, 61A (not shown) that have an elliptical end surface (not shown) perpendicular to the optical axis 39 at the end on the virtual camera 37 side. To set.

FIG. 19 shows an example of a contact determination method when executing the transparency processing in this modification. The ellipse in FIG. 19 indicates the transparent objects 51A, 57A, 61A obtained by lengthening the above-described transparent objects 51, 57, 61 in the camera coordinate system 53 in the Y direction at arbitrary positions perpendicular to the Z axis of the camera coordinate system 53. It shows the shape seen in the cross section. The minor radius a and major radius b of the ellipse are determined by the above-mentioned functions h(x), g(x), i(x) (however, the value of y needs to be changed depending on the radius of the ellipse). It is required according to the position.

In FIG. 19, for example, the process for the pixel P3 is performed as follows. First, a perpendicular vector 75 is generated between the pixel P3 and the center line (optical axis 39) of the transparentized object, and the length of the perpendicular vector 75 on the XZ plane in the camera coordinate system 53 is set to X3, and the perpendicular vector 75 is set. calculating the Y3 from ellipse formula ^{(x 2 / a 2 + y} 2 / b 2 = 1) using the value. The value of Y3 is compared with the length L3 of the perpendicular vector 75, and when Y3 is larger than L3, the transparency processing is executed. In the case of the pixel P3, since Y3 is larger than L3, the pixel P3 is subjected to the transparency processing.

The process for the pixel P4 is similar to the above. First, a perpendicular vector 77 is generated between the pixel P4 and the center line (optical axis 39) of the transparent object, and the length of the perpendicular vector 77 on the XZ plane in the camera coordinate system 53 is set to X4. calculating a from Y4 ellipse formula ^{(x 2 / a 2 + y} 2 / b 2 = 1) using the value. When the value of Y4 is compared with the length L4 of the perpendicular vector 77, Y4 is smaller than L4, and thus the pixel P4 is not subjected to the transparency processing.

FIG. 20 shows an example of an image when the transparency processing is executed. In the example shown in FIG. 20, the player character 25 and the enemy character 79 are in battle and are displayed side by side in the vertical direction when 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 semi-transparent into an elliptical shape elongated in the vertical direction by the above-described image processing. In particular, in a battle that progresses in real time, it is important for the player to make momentary judgments and operations, so that if the enemy character 79 cannot be seen, appropriate protection cannot be provided against attacks from the enemy, and There is a possibility of being disadvantaged in battle by missing the timing of a specific attack. According to this modification, the visibility can be secured not only for the player character 25 but also for the enemy character 79, so that the above disadvantages can be prevented. Note that this modification is particularly effective when the arrangement of the player character 25 and the enemy character 79 on the screen is fixed by, for example, the function of locking on the enemy.

According to the above modified example, when important information about 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, it is long in the specific direction. By using an elliptical end surface, it is possible to ensure visibility including important information.

It should be noted that the present invention can be applied to games of various genres, as long as another object may enter between the virtual camera and the object that 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.

Further, in addition to the above description, the methods according to the above-described embodiment and each modification may be appropriately combined and used. In addition, although not illustrated one by one, the above-described embodiment and each modified example are implemented with various modifications within a range not departing from the gist thereof.

<7. Hardware configuration of information processing device>
Next, with reference to FIG. 21, an example of a hardware configuration of the information processing device 3 that realizes each processing unit implemented by the program executed by the CPU 101 or 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 constructed for a specific application such as an ASIC or an FPGA, 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 to each other via a bus 109, an input/output interface 111, etc. so that signals can be transmitted to each other.

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

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, various kinds of CDs, MO disks, DVDs, and 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 program recorded in these recording media 125 may be read by the drive 119 and recorded in the recording device 117 via the input/output interface 111, the bus 109, or the like.

Further, 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 the 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.

Further, 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, the bus 109, or the like.

Then, the CPU 101 executes various processes in accordance with the program recorded in the recording device 117, so that the process by the image generation processing unit 13, the transparent object setting processing unit 21, the transparent execution processing unit 23, and the like described above is performed. Will be realized. At this time, the CPU 101 may directly read the program from the recording device 117 and execute the program, or may load the program into the RAM 105 and execute the program. Further, for example, when the program is received via the communication device 123, the drive 119, and the connection port 121, the CPU 101 may directly execute the received program without recording it in the recording device 117.

In addition, the CPU 101 may perform various kinds of processing based on signals and information input from the input device 113 such as a mouse, a keyboard, a microphone (not shown) including the game controller 5 described above, if necessary. Good.

The GPU 106 performs image display processing such as rendering processing in response to an instruction 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 display device 7 and the audio output unit described above, for example. Further, the CPU 101 and the GPU 106 may transmit the processing result via the communication device 123 or the connection port 121 as necessary, and may record the processing result in the recording device 117 or the recording medium 125.

3 Information Processing Device 13 Image Generation Processing Section 15 First Collision Determination Object Setting Processing Section 17 Second Collision Determination Object Setting Processing Section 19 Collision Determination Processing Section 21 Transparent Object Setting Processing Section 23 Transparent Execution Processing Section 25 Player Character (First object)
35 pillars (second object)
37 Virtual camera 39 Optical axis
41 Reference position (position of the first object)
43 First collision determination object 45 Reference position (position of virtual camera)
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 viewed from a virtual camera in a virtual three-dimensional space,
A transparentized object setting processing unit that sets a transparentized object existing over the range from the position of the first object arranged in the three-dimensional space to the position of the virtual camera when the image is generated,
A transparency execution processing unit that executes transparency processing on a portion of the second object arranged in the three-dimensional space that comes into contact with the transparency object when the image is generated,
A game program that works as a. The information processing device,
A first collision determination object setting processing unit for setting a first collision determination object having a rectangular parallelepiped shape that exists over the range from the position of the first object to the position of the virtual camera;
A second collision determination object setting processing unit that sets a second collision determination object having a rectangular parallelepiped shape including the second object;
A collision determination processing unit that determines the presence or absence of a collision between the first collision determination object and the second collision determination object,
To function further as
The transparency execution processing unit,
Performing the transparency processing on a portion of the second object corresponding to the second collision determination object determined to have the collision, the portion being in contact with the transparency object;
The game program according to claim 1. The transparent object setting processing unit,
Setting the transparent object having a shape in which a diameter with respect to an axis connecting the first object and the virtual camera increases from the first object toward the virtual camera,
The game program according to claim 1. The transparent object setting processing unit,
The transparent object is set such that the tip on the first object side is sharp and the diameter is expanded in a curved shape from the first object toward the virtual camera.
The game program according to claim 3. The transparent object setting processing unit,
The transparent object having an elliptical end surface perpendicular to the axis is set at the end on the virtual camera side,
The game program according to claim 3 or 4. The transparency execution processing unit,
The transparency processing is performed on a portion of the second object that comes into contact with the transparency object, so that the transparency increases as the axis approaches.
The game program according to any one of claims 3 to 5. A recording medium which records the game program according to claim 1 and which can be read by an information processing device. A game processing method executed by an information processing device, comprising:
Generating an image viewed from a virtual camera in a virtual three-dimensional space,
Setting a transparent object existing over the range from the position of the first object arranged in the three-dimensional space to the position of the virtual camera when the image is generated,
Performing a transparentization process on a portion of the second object arranged in the three-dimensional space that is in contact with the transparentized object when the image is generated,
And a game processing method.

Images