JP2016093362A - Control program of virtual camera within game space, and game system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control program of a virtual camera within a game space capable of solving operational problems that may occur since the visual field visible to a player character does not agree with the visual field visible to a user via HMD, and to provide a game program including the control program.SOLUTION: A virtual center axis of a visual field angle of a virtual camera is set, and transmittance of a polygon in that a directional vector with the virtual camera as a starting point has an angle within a predetermined range to the virtual center axis from among polygons existing within the visual field angle is adjusted.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a virtual camera control program and game system in a game space, and more particularly to a virtual camera control program and system in a game space for realizing a game using a head-mounted display.

  Conventionally, as a kind of so-called shooting game, a genre called first person shooting (hereinafter referred to as “FPS”) in which a player fights from the first person viewpoint is known. In FPS, it is common to define a three-dimensional virtual space (hereinafter referred to as “game space”) divided by a floor and a wall, and to develop a story in the game space.

  In FPS, a player character or an enemy character may be hidden behind a wall or object and cannot be seen by the player. In such a case, it is checked whether or not the display position of the player character is in the vicinity of or behind the wall or floor in the background image, and the display position of the player character is the shadow of the wall or floor in the background image. In such a case, a technique has been proposed in which a wall or floor that overlaps the display position of the player character is displayed translucently, and the floor, wall, player character, and the like located behind the display are displayed (patent) Reference 1)

Patent 2902352

  2. Description of the Related Art In recent years, general consumers are becoming more and more popular with computer games using a head-mounted display (hereinafter referred to as “HMD”) equipped with an acceleration sensor. In such an HMD, the state of the virtual space is projected according to the orientation of the user's head. In a conventional video game or the like, the player character is often projected at the center of the screen (that is, the virtual camera in the game space always moves following the player character).

However, in the above HMD, regardless of the position of the player character in the game space, the state of the game space spreading in the direction in which the player faces is displayed on the HMD (for example, in a state where the player character is present in the front view). When facing sideways, the player character will disappear from view). In this case, as shown in FIG. 9, if the virtual camera away from the player character P by a predetermined distance Q to follow, as in (a) of FIG. 9, the user while advancing the player character in the M _P direction When the head is turned to the right, as shown in FIG. 9B, the right field of view of the virtual camera VC is the right field of view of the player character P even though the right field of view of the player character P is not obstructed by the wall object Wall. The wall object Wall is reflected and the field of view is blocked. In other words, so that that it is not allowed to proceed to M _P direction more than necessary the player character P does not disappear the wall object Wall from the field of view of the virtual camera VC. As described above, since the field of view that the player character P may see and the field of view that the user actually sees through the HMD do not match, an operational problem occurs.

  Therefore, an object of the present invention is to provide a virtual camera control program in a game space that can solve the above-described problems.

According to the present invention, as a virtual camera control program in the first game space,
A visual field setting unit for setting a viewing angle of the virtual camera and a virtual central axis of the viewing angle;
An object within the viewing angle that identifies an object within the viewing angle that is present within the viewing angle and is composed of a plurality of polygons and whose distance from the virtual camera is equal to or less than a predetermined distance;
A direction vector assigning unit for assigning a direction vector starting from the virtual camera to each of the polygons constituting the object within the viewing angle;
A transmittance adjusting unit that adjusts the transmittance of the polygon to which a direction vector having an angle formed with the virtual central axis is within a predetermined range;
As a computer terminal,
Virtual camera control program in game space.

According to the present invention, as the virtual camera control program in the second game space, the virtual camera control program according to the first aspect,
The transmittance adjusting unit obtains a virtual camera control program in the game space that lowers the transmittance of the polygon assigned to the direction vector as the angle between the direction vector and the virtual central axis increases.

According to the present invention, there is also provided a game system having at least a head mounted display and a computer terminal that outputs an image in the game space corresponding to the orientation of the head of the user wearing the head mounted display to the head mounted display. Because
The computer terminal is
(1) In the game space, set the viewing angle of the virtual camera and the virtual central axis of the viewing angle;
(2) Identify an object within a viewing angle that is within a viewing angle and is composed of a plurality of polygons and whose distance from the virtual camera is a predetermined distance or less,
(3) assigning a direction vector starting from the virtual camera to each of the polygons constituting the object within the viewing angle;
(4) adjusting the transmittance of the polygon to which a direction vector having an angle formed with the virtual central axis is within a predetermined range;
(5) A game system is obtained in which information within the viewing angle after the transmittance is adjusted is output to the head mounted display.

  According to the present invention, all the polygons having a constant angle with the axis vector within a certain distance range from the virtual camera are uniformly subjected to the transparent process. As described above, even when the positions of the player character P and the virtual camera VC are deviated, the progress of the game is not hindered.

  Further, according to the present invention, as another method of the transmission process, a transparent viewing angle is set within the viewing angle of the virtual camera, and the transmission process is uniformly performed for all polygons within a certain distance range from the virtual camera. Therefore, it is possible to perform transparent processing without imposing a load on the terminal.

It is a figure which shows the structural example of the game system by one Embodiment of this invention. It is a figure which shows the relationship between the virtual camera by one Embodiment of this invention, and a game screen. It is the figure which looked at the mode when a virtual camera was moved in parallel with XY plane in FIG. 2 along the Z direction. It is another figure which shows the relationship between the virtual camera by one Embodiment of this invention, and a game screen. It is another figure which shows the relationship between the virtual camera by one Embodiment of this invention, and a game screen. It is a graph which shows the relationship between the axis vector of a virtual camera, and the transmittance | permeability. It is a figure which shows the relationship between the virtual camera by other embodiment of this invention, and a game screen. It is the figure which looked at FIG. 7 along the Z direction. It is the prior art example which showed the positional relationship of a player character and a virtual camera.

<Outline of the game system>
A virtual camera control program in a game space according to an embodiment of the present invention is executed in a game system that uses a head mounted display (hereinafter referred to as “HMD”) and a computer terminal (hereinafter referred to as “PC”). Specifically, as shown in FIG. 1, the game system 1 includes at least a PC 10, an HMD 20, and a smartphone (portable terminal) 30. When the game system according to the present invention is outlined, the game program is installed in the PC 10 via a dedicated game server (not shown), and images, videos, and other visual information generated during the execution of the game program are stored in the HMD 20. Is output. In the present embodiment, the PC 10 and the HMD 20 are connected by a cable, but may be connected by other methods such as Bluetooth and wireless LAN. The smartphone 30 functions as a so-called game controller, and transmits an instruction according to a user operation to the PC 10. The PC 10 and the smartphone 30 are connected via Bluetooth, wireless LAN, or the like.

<PC10>
The PC 10 includes a terminal display unit 11, a terminal input unit 12, a terminal processing unit 13, a terminal communication unit 14, a terminal storage unit 15, and the like, which are electrically connected to each other via a bus.

  The terminal display unit 11 temporarily stores the game program received by the terminal communication unit 14 from the game server in the terminal storage unit 15 and displays it through a browser or the like. The terminal display unit 11 can be realized by, for example, a liquid crystal display (LCD) or the like, but in the embodiment, it is particularly preferable to configure as a multi-touch screen.

  The terminal input unit 12 functions to input user commands until the PC 10 activates the game program. As an input means, it can be a character input by a keyboard or a virtual keyboard, a click of an object by a mouse, a touch input by a finger at a position on the touch screen corresponding to the object position or an input by a stylus, and a combination thereof. It is not limited to these.

  The terminal processing unit 13 creates a user command based on the input command received by the terminal input unit 12, and communicates with the game server through the terminal communication unit 14 and a network (not shown). Then, a related game program is executed in the game server. The terminal storage unit 15 stores various data associated with the PC 10 and applications such as a browser necessary for displaying image data, and temporarily stores various data such as image data received from the game server. The terminal processing unit 13 may also execute a game program stored in advance on the terminal side based on various data received by download from the game server.

<HMD20>
As illustrated, the HMD 20 includes an HMD display unit 21, an HMD input unit, an HMD communication unit 23, and an HMD acceleration sensor unit. The HMD 20 transmits and receives data to and from the terminal communication unit 14 via the HMD communication unit 23. The HMD terminal display unit 21 causes the visual information received from the PC 10 to be visually recognized by each of the user's eyes. The HMD 20 according to the present embodiment includes an HMD acceleration sensor 24, and transmits displacement information corresponding to the displacement of the user's head (including those caused by the displacement of the posture) to the PC 10. On the PC 10 side, the visual information corresponding to the displacement information is fed back to the HMD 20 and displayed on the HMD display unit 21 in cooperation with the terminal storage unit 15 and the terminal processing unit 13 based on the received displacement information.

<Smartphone 30>
The smartphone 30 includes a display unit, an input unit (touch panel), a processing unit, a communication unit, a storage unit, and the like (all not shown). In the present embodiment, user commands (such as “selection” and “move” of an object) are performed by using the smartphone 30 as a substitute for a so-called controller, but the user commands are input using an input device such as a keyboard or mouse of the PC 10. It is also possible to prepare a dedicated controller separately.

<Specific information processing>
In the following description, it is assumed that the PC 10 downloads a game program from the game server and the game program is executed on the PC 10.

  When the game program is executed, a game screen is displayed on the HMD 20 in response to a story previously incorporated in the game program or an input of a user command. The game screen corresponds to an area (virtual camera display area) specified by the virtual camera set in the game space. The orientation of the virtual camera according to the present embodiment is linked to the HMD acceleration sensor 24 of the HMD 20. That is, when the user turns to the right, a space corresponding to the right display area of the game screen currently displayed on the HMD 20 is displayed.

As shown in FIG. 2, the virtual camera VC has a predetermined range of viewing area (viewing angle: not shown) at the center of the axis vector F extending toward the front of the camera. The object on the axis vector F is displayed at the center of the screen. The virtual camera VR can capture all objects within the field of view. In the present embodiment, as illustrated, a wall object W exists within a predetermined range L from the virtual camera VC. The transparent area I which is a part of the wall object W is transparently displayed and displayed transparently, and the object behind the wall object W is partially visible. Direction vector of the end portion in the X direction of the transmission region I (i.e., the boundary portion between the portion and the transmission process is not performed parts transmission process is performed in the X direction) is specified by the vector P _R and P _L vector . Specifically, the vector P _R and vector P _L, a direction vector starting from the virtual camera VC polygons bordering portion has, the angle between the axis vector F in the X-direction is in each θ . That is, in the present embodiment, the transmission process is performed on a polygon having a direction vector whose angle formed with the axis vector F is equal to or smaller than the predetermined angle θ.

FIG. 3 shows FIG. 2 from above (that is, along the Z direction) (the character displayed in FIG. 2 is labor-saving), and changes in the transmission region when the virtual camera VC moves. Is shown. The distance in the Y direction between the wall object W and the virtual camera shown in FIG. Here, when the virtual camera moves from VC ₀ to VC ₁ , the transmission region of the wall W changes from I ₀ to I ₁ . Similarly, axial vector _F of the virtual camera in the VC _{0 0,} the direction vector _{P R0} and _{P L0} vectors define the boundaries in the X direction of the transmission region _{I 0,} respectively, the axial vector _{F 1} of the virtual camera in VC ₁ , corresponding to the direction vector _{P R1} and _{P L1} vectors define the boundaries in the X direction of the transmission region _{I 1.}

FIG. 4 is a diagram illustrating a relationship between the _three wall objects W _{1 to} W ₃ located at different distances from the virtual camera VC and the transmissive area. As shown, the distance between the wall object W ₁ and W ₂ and the virtual camera VC is at L or less, a wall object W ₃ distance between the virtual camera VC is greater than L. Therefore, the transmission processing is the only wall object _{W 1} and _{W 2} (see transmission region _{I 2} and _{I 3)}

FIG. 5 is a diagram showing the relationship between the wall object W ₄ provided so as to cross the axis vector F of the virtual camera VC and the transmission region I ₄ . As described above, in the transparency processing in the present embodiment, the distance from the virtual camera VC in the Y direction (forward) is L or less, and the direction vector starting from the virtual camera VC is the axis vector F of the virtual camera VC. angle between is performed for polygons having the direction vector theta (see transmission region I ₄ in the drawing).

  As shown in FIG. 6, the transparency processing according to the present embodiment is performed for a polygon having a direction vector whose angle with the axis vector of the virtual camera is 0 (that is, a polygon located on the axis vector). The transmissivity is 100%, and the transmissivity is gradually lowered as the angle with the axis vector increases. When viewed from the user, the transmittance gradually decreases from the center to the periphery of the transmissive region. In other words, the transmittance can be regarded as a function of θ. As a result, the transmissive region can appear naturally.

  A game program according to another embodiment of the present invention is a modification of the virtual camera control program in the above-described game space. Therefore, the same fertile iodine is attached with the same reference symbol, and the description thereof is omitted.

  As shown in FIG. 7 and FIG. 8, the virtual camera VC according to the present embodiment has a viewing angle E1 that is a range that can be visually recognized by the user, and a transmission viewing angle (specific viewing angle) E2 that is located within the viewing angle E1. And set. The virtual camera VC is not displayed if the object is located within the transmission viewing angle E2 and satisfies the condition that the distance from the virtual camera VC is L or less. That is, as shown in FIG. 7, the wall object W that satisfies this condition appears to the user's eyes as if a gap was opened. Note that a flag may be set in advance for an object (for example, a player character) that is not hidden even within the transmission viewing angle E2.

  As described above, the virtual camera control program shown in FIGS. 2 to 6 can naturally show the transmission of the wall object, but requires calculation of a direction vector having an angle approximate to the axis vector. Therefore, the load on the terminal is large. On the other hand, in the virtual camera control program shown in FIGS. 7 and 8, since the objects within the transmission viewing angle are uniformly hidden, the burden on the terminal is small, but the transparent expression of the wall object is unnatural. It may be evaluated.

  The above-described embodiments are merely examples for facilitating understanding of the present invention, and are not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Game system 10 User terminal 11 Terminal display part 12 Terminal input part 13 Terminal processing part 14 Terminal communication part 15 Terminal memory | storage part 50 Game server 51 Processing part 52 Main memory 53 External memory 54 User interface 55 Communication part 56 Disk drive 100 Game system

Claims (5)

A virtual camera control program in a game space,
A visual field setting unit for setting a viewing angle of the virtual camera and a virtual central axis of the viewing angle;
An object within the viewing angle that identifies an object within the viewing angle that is present within the viewing angle and is composed of a plurality of polygons and whose distance from the virtual camera is equal to or less than a predetermined distance;
A direction vector assigning unit for assigning a direction vector starting from the virtual camera to each of the polygons constituting the object within the viewing angle;
A transmittance adjusting unit that adjusts the transmittance of the polygon to which a direction vector having an angle formed with the virtual central axis is within a predetermined range;
As a computer terminal,
Virtual camera control program in game space. A virtual camera control program according to claim 1,
The transmittance adjustment unit is a virtual camera control program in a game space that reduces the transmittance of the polygon assigned to the direction vector as the angle between the direction vector and the virtual central axis increases. A game system having at least a head mounted display and a computer terminal that outputs an image in the game space according to the orientation of the head of a user wearing the head mounted display to the head mounted display,
The computer terminal is
(1) In the game space, set the viewing angle of the virtual camera and the virtual central axis of the viewing angle;
(2) Identify an object within a viewing angle that is within a viewing angle and is composed of a plurality of polygons and whose distance from the virtual camera is a predetermined distance or less,
(3) assigning a direction vector starting from the virtual camera to each of the polygons constituting the object within the viewing angle;
(4) adjusting the transmittance of the polygon to which a direction vector having an angle formed with the virtual central axis is within a predetermined range;
(5) Output information within the viewing angle after the transmittance is adjusted to the head mounted display.
Game system.
A virtual camera control program in a game space,
A viewing angle setting unit for setting a viewing angle of the virtual camera;
A specific viewing angle setting unit for setting a specific viewing angle within the viewing angle;
A transparency processing unit that performs transparency processing on a specific object that is within the viewing angle and has a distance from the virtual camera that is equal to or less than a predetermined distance and that is included in the specific viewing angle;
A virtual camera control program in a game space that causes a computer terminal to function as a computer program. A game system having at least a head mounted display and a computer terminal that outputs an image in the game space according to the orientation of the head of a user wearing the head mounted display to the head mounted display,
The computer terminal is
(1) In the game space, set the viewing angle of the virtual camera,
(2) A specific viewing angle is set within the viewing angle,
(3) An object existing within the viewing angle, the distance from the virtual camera being equal to or less than a predetermined distance, and performing a transmission process on a specific object included in the specific viewing angle;
(4) The information within the viewing angle after the transmission process is performed is output to the head mounted display.
Game system.

Images