JP7529382B2 - PROGRAM, VIRTUAL SPACE PROVIDING METHOD, AND VIRTUAL SPACE PROVIDING DEVICE - Google Patents

Description

The present invention relates to a program for providing a virtual space, a method for providing a virtual space, and a device for providing a virtual space.

Patent document 1 describes an image processing device that performs rendering processing on multiple polygons to generate image data.

Japanese Patent Application Publication No. 11-66340

In an image processing device such as that described in Patent Document 1, an optimal screen display technology is required when hiding polygons arranged in a virtual space. However, conventional image processing technology has not been able to adequately meet such a demand.

The present disclosure therefore aims to provide a program, a method for providing a virtual space, and a device for providing a virtual space that improves screen display technology when hiding polygons placed in a virtual space.

A program according to one aspect of the present invention causes a computer that provides a virtual space to function as a polygon placement unit that places polygons on a specific surface in the virtual space, a distance measurement unit that measures the distance between the virtual viewpoint and an area on the specific surface in which the polygons are placed, a first display control unit that controls the display of the polygons when the measured distance is equal to or greater than a specific distance, and a second display control unit that controls the display of the area in a display form according to the measured distance when controlling the display of the polygons.

A virtual space providing method according to one aspect of the present invention is a virtual space providing method executed by a computer that provides a virtual space, and includes the steps of placing a polygon on a predetermined surface in the virtual space, measuring the distance between the virtual viewpoint and an area on the predetermined surface in which the polygon is placed, controlling the display of the polygon if the measured distance is equal to or greater than a predetermined distance, and controlling the display of the polygon so that the area is displayed in a display form according to the measured distance when controlling the display of the polygon.

A virtual space providing device according to one aspect of the present invention is a virtual space providing device that provides a virtual space, and includes a polygon placement unit that places polygons on a specific surface in the virtual space, a distance measurement unit that measures the distance between a virtual viewpoint and an area on the specific surface in which the polygons are placed, a first display control unit that controls the display of the polygons when the measured distance is equal to or greater than a specific distance, and a second display control unit that controls the display of the area in a display form according to the measured distance when controlling the display of the polygons.

In this invention, "part" and "device" do not simply mean physical means, but also include cases where the functions of the "part" or "device" are realized by software. Furthermore, the functions of one "part" or "device" may be realized by two or more physical means or devices, and the functions of two or more "parts" or "devices" may be realized by one physical means or device.

The above aspect of the present invention makes it possible to improve screen display technology when hiding polygons placed in a virtual space.

1 is a schematic configuration diagram of a virtual space providing system according to an embodiment of the present invention. 1 is a configuration diagram illustrating a schematic hardware configuration of a virtual space providing device according to an embodiment of the present invention. 1 is a schematic diagram showing an example of a functional configuration of a virtual space providing device according to an embodiment of the present invention. FIG. 1 is a diagram conceptually illustrating an example of a virtual space according to an embodiment of the present invention. FIG. 2 is a diagram conceptually illustrating an example of polygon information according to the embodiment of the present invention. FIG. 2 is a diagram conceptually illustrating an example of face information according to an embodiment of the present invention. 11 is a flowchart illustrating an example of a virtual space providing process according to an embodiment of the present invention. FIG. 2 is a diagram showing an example of an image displayed on the playback device according to the embodiment of the present invention.

Below, an embodiment of the present invention will be described with reference to the drawings. However, the embodiment described below is merely an example, and there is no intention to exclude various modifications and application of technologies not specified below. In other words, the present invention can be implemented with various modifications (such as combining each embodiment) within the scope of the gist of the invention. In addition, in the description of the drawings below, the same or similar parts are represented by the same or similar symbols. The drawings are schematic and do not necessarily match the actual dimensions, ratios, etc. The drawings may also include parts with different dimensional relationships and ratios.

Figure 1 is an overall configuration diagram of a virtual space provision system according to an embodiment of the present invention. As shown in Figure 1, the virtual space provision system 1 is illustratively configured to include a virtual space provision device 3 that defines and provides a virtual space, a playback device 5 that plays image data and audio data including the virtual space provided by the virtual space provision device 3, and an input device 9 that is operated by a user.

The playback device 5 is a device that outputs images and sounds, and plays music content. For example, the playback device 5 may be a television or computer display having a display and speakers. The playback device 5 may be connected to the virtual space providing device 3 via a wired cable or a wireless LAN (Local Area Network).

The input device 9 is a device that transmits a control signal corresponding to operation information input by a user to the virtual space providing device 3. In this embodiment, the input device 9 is configured to be capable of wireless communication with the virtual space providing device 3. The input device 9 and the virtual space providing device 3 establish a wireless connection using, for example, a Bluetooth (registered trademark) protocol. Note that the input device 9 and the virtual space providing device 3 may be configured to transmit the above control signal via a wired cable.

The virtual space providing device 3 performs a virtual space providing function by loading an application program for providing a virtual space. The virtual space providing device 3 may be, for example, a game console, a personal computer, a tablet terminal, or a mobile terminal such as a smartphone.

The virtual space providing device 3 has a USB (Universal Serial Bus) terminal and can connect to an external device such as a personal computer via a cable 7 to obtain various information from the external device. Furthermore, the virtual space providing device 3 has a media drive and is configured to obtain various information from a ROM medium. Furthermore, the virtual space providing device 3 may be configured to obtain various information from an external server or the like via a network. Note that in this embodiment, the input device 9, the playback device 5, and the virtual space providing device 3 are separate entities, but they may also be configured as an integrated unit. For example, the input device 9, the playback device 5, and the virtual space providing device 3 may be configured as a mobile terminal device that executes the virtual space providing process.

Figure 2 is a schematic diagram showing the hardware configuration of a virtual space providing device according to an embodiment of the present invention. As shown in Figure 2, the virtual space providing device 3 is illustratively configured to include a wired/wireless interface 10, an antenna 11, a data processing unit 12, a memory 14, a hard disk drive 15, a disk drive 16, a recording medium attachment/detachment unit 18, and a control unit 100. Each of the above components is configured to input and output various information and data via a bus 19.

The wired/wireless interface 10 is a means for connecting to an external device by wire or wirelessly and transmitting and receiving data. The wired/wireless interface 10 connects to the external device via the above-mentioned specified cable 7 and acquires various information from the external device. The wired/wireless interface 10 also connects to the input device 9 using a specified wireless communication protocol. A control signal from the input device 9 is supplied to the control unit 100 via the antenna 11, the wired/wireless interface 10, and the bus 19. Note that the wired/wireless interface 10 may be configured such that the wired interface unit and the wireless interface unit are integrated together, or may be configured as separate units.

The data processing unit 12 is configured with a frame memory and the like that buffers the video and audio data that constitutes the content to be played back on the playback device 5.

Memory 14 is configured as a RAM (random access memory) and includes, for example, a main memory and a buffer memory.

The hard disk drive 15 is an auxiliary storage device that stores various information and data. For example, the hard disk drive 15 stores various information and data received via the wired/wireless interface 10, and stores various information and data that the recording medium attachment/detachment unit 18 reads from a removable recording medium, as described below.

The disk drive 16 is a device that drives a read-only ROM disk and reads data. When a ROM disk is inserted, the disk drive 16 reads the data stored on the ROM disk. The ROM disk may be, for example, an optical disk or a magneto-optical disk.

The recording medium attachment/detachment unit 18 is a device that reads data from a removable recording medium when the removable recording medium is attached. Here, in this embodiment, a program related to the virtual space provision process described below may be recorded on a removable recording medium or a ROM disk, and may be configured to be installed from the recording medium attachment/detachment unit 18 or the disk drive 16 to the hard disk drive 15. The program may also be obtained from an external server or the like via a network.

The control unit 100 is configured with a CPU and controls the processes executed by each of the above components included in the virtual space providing device 3. The control unit 100 is also configured to include multiple processor cores in the CPU. Furthermore, the control unit 100 is configured with a memory controller connected to the memory 14.

Figure 3 is a block diagram showing an example of the functional configuration of a virtual space providing device according to an embodiment of the present invention. As shown in Figure 3, the virtual space providing device 3 is illustratively configured to include an information processing unit 111 that executes processing for providing a virtual space, and a database (DB) 112 that records various information required to execute the processing and information related to the results of the processing. Note that the information processing unit 111 can be realized, for example, by the control unit 100 executing a program stored in the memory 14 or the like shown in Figure 2. The DB 112 corresponds, for example, to the hard disk drive 15 shown in Figure 2.

The information processing unit 111 functionally comprises a polygon placement unit 113 that places polygons on a specific surface in the virtual space, a distance measurement unit 114 that measures the distance between the virtual viewpoint and the area on the specific surface where the polygons are placed, a polygon display control unit 115 (first display control unit) that controls the display of polygons when the measured distance is equal to or greater than a specific distance, and a surface display control unit 116 (second display control unit) that controls the display of the area on the specific surface where the polygons are placed in a display form according to the measured distance when controlling the display of polygons. Details of each of the above functions will be described later.

In controlling the display of polygons, for example, LOD (Level Of Detail ) control processing technology is adopted. LOD control processing is a technology that controls the detail of the display form of at least one of a predetermined surface or polygon according to the distance from the virtual camera to the predetermined surface or polygon, thereby reducing the load of rendering processing in, for example, a game scene. LOD control processing is characterized by being able to speed up the drawing processing while reducing the number of polygons displayed in the distance in a certain game scene, without significantly impairing the appearance of the game scene.

The virtual space providing system 1 of this embodiment shown in FIG. 1 will be outlined. The virtual space providing system 1 employs this LOD control technology. In the virtual space providing system 1, grass polygons are implemented on the ground in the game scene (virtual space). When the virtual camera is close to the grass polygon (in the case of a close view), the display of the grass polygon is maintained, but when the distance between the virtual camera and the grass polygon is a predetermined distance away, the grass polygon is hidden by the LOD control process. More specifically, in the case of a close view, the grass polygon on the ground is drawn in dark green. As the distance between the virtual camera and the grass polygon increases, the grass polygon is drawn in a lighter green color, for example, green, yellow-green, and so on. And finally, when the distance between the virtual camera and the grass polygon is a predetermined distance away, the grass polygon is hidden. Here, as an example, a mode will be considered in which, for example, the grass polygon is rendered in gradually lighter colors according to the distance between the virtual camera and the grass polygon by the LOD control process, and is finally hidden, but the color of the ground on which the grass polygon is placed is not controlled. That is, in this mode, if the color of the ground on which the grass polygon is placed is dark green, the color of the ground remains dark green even if the distance between the virtual camera and the grass polygon is a predetermined distance away. Thus, according to the above mode, the color of the grass polygon is controlled according to the distance between the virtual camera and the grass polygon, but the color of the ground on which the grass polygon is placed is constant. Therefore, when the distance between the virtual camera and the grass polygon is a predetermined distance away, the color of the grass polygon just before being hidden is, for example, light green, and the color of the ground remains, for example, dark green as described above, which gives an unnatural appearance. Therefore, in the virtual space providing system 1, when a grass polygon far from the virtual camera is hidden, the ground on which the grass polygon is placed is displayed in a color according to the distance from the virtual camera. For example, in the virtual space providing system 1, if a grass polygon is rendered in light green immediately before being hidden, the ground color is rendered in a light green instead of the original dark green to correspond to the color of the grass polygon. This reduces the sense of incongruity when the grass polygon is hidden, and allows efficient screen rendering by LOD control processing. In this embodiment, as described above, the color of the grass polygon is also changed according to the distance from the virtual camera. Then, since it is only necessary to reduce the sense of incongruity by matching the color of the polygon after this change (for example, the color immediately before the grass polygon is erased) with the color of the ground on which the grass polygon is placed, the color of the polygon and the color of the ground are not limited to green, and other colors may be used.

The information processing unit 111 further includes, functionally, a block setting unit 117 (area setting unit) that sets one or more blocks (areas) in the virtual space, and an image generating unit 118 that defines the virtual space based on the virtual space data and generates an image including the virtual space.

Figure 4 is a conceptual diagram of an example of a virtual space according to an embodiment of the present invention. As shown in Figure 4, the virtual space 50 defined by the image generation unit 118 includes, for example, a plurality of blocks B1 to B4 set by the block setting unit 117. In the virtual space 50, for example, in a certain game scene, a virtual camera 60 (virtual viewpoint) (e.g., corresponding to the viewpoint of a user who operates the input device 9 shown in Figure 1 to play the game) is placed in a box B1 of the virtual space 50. This virtual camera 60 captures an image of a predetermined range including the region R in which the polygon P is located on a predetermined surface, and based on the image information acquired, an image (screen) is displayed on the display of the playback device 5 shown in Figure 1.

As described above, the position of the virtual camera 60 corresponds to the user's viewpoint in the virtual space 50, so that, for example, by operating the input device 9, at least one of the position and tilt of the user's viewpoint (virtual camera 60) is controlled. The image generation unit 118 controls the viewing area in the virtual space 50 based on the control of at least one of the position and tilt of the virtual camera 60. For example, the viewing area corresponds to the area of the virtual space 50 that is visible to the user.

The image generation unit 118 generates image data for generating an image including the virtual space 50. Thereafter, when at least one of the position and tilt of the virtual camera 60 changes, the image generation unit 118 generates image data for generating a new image according to the change.

DB112, for example, records spatial information SPI, polygon information PI, surface information SUI, and block information AI. In addition to the above information, DB112 may also record information about the user who is playing the game.

The spatial information SPI includes one or more virtual space data templates for defining the virtual space 50 shown in FIG. 4.

The block information AI includes, for example, one or more block data templates for setting multiple blocks B1 to B4, etc., as shown in FIG. 4. In addition, in DB112, spatial information SPI, polygon information PI, and surface information SUI may be recorded in association with each other for each of multiple blocks.

Polygon information PI is information about polygons placed in virtual space. Polygons are, for example, image information that imitates plants such as grass, trees, and flowers, as well as woods and forests, that are placed on a specific surface in virtual space (for example, the ground in a landscape image). Note that polygons are not limited to the above, and may also include image information that imitates animals, cityscapes, etc.

Figure 5 is a conceptual diagram illustrating an example of polygon information according to an embodiment of the present invention. As shown in Figure 5, polygon information PI is recorded in DB112 in association with a polygon ID for identifying a polygon, the type of polygon, the size of the polygon, the shape of the polygon, the color of the polygon, whether or not the polygon can be hidden (for example, if "o", the polygon can be hidden), and the screen occupancy rate of the polygon when the polygon is hidden.

The screen occupancy rate of a polygon indicates the ratio of the range in which a specific polygon is displayed to the entire screen displayed by the playback device 5 shown in FIG. 1. In other words, if the screen occupancy rate of a polygon falls below a predetermined value (e.g., X%, etc.), the polygon is hidden. Here, the screen occupancy rate of a polygon can be calculated based on the distance between the virtual camera 60 and the polygon P shown in FIG. 4, for example. Therefore, the condition for whether or not to perform the hidden control of a polygon may be the distance between the virtual camera 60 and the polygon P instead of the screen occupancy rate of the polygon. For example, if the distance between the virtual camera 60 and the polygon P is equal to or greater than a predetermined distance, the polygon P is hidden. Note that the distance between the virtual camera 60 and the polygon P is considered to be equivalent to the distance between the virtual camera 60 and the area in which the polygon P is located, so the distance between the virtual camera 60 and the area in which the polygon P is located may be used instead of the distance between the virtual camera 60 and the polygon P.

As described above, the display form of a polygon is controlled according to the distance between the virtual viewpoint and the polygon measured by the distance measurement unit 114 shown in FIG. 3, similar to the specified surface described below. In this way, like the surface information SUI, the polygon information PI records a polygon ID for identifying the polygon, information on the display form of the polygon (e.g., color), and the distance between the virtual viewpoint and the polygon in association with each other. Furthermore, polygons do not necessarily need to be controlled to be hidden, and may include polygons that are always displayed regardless of the screen occupancy rate of the polygon or the distance between the virtual camera 60 and the polygon P. Furthermore, the polygon information PI includes information for placement in the virtual space (e.g., placement position information, etc.).

The surface information SUI is information about a specific surface in a virtual space. The specific surface in a virtual space may be a single surface that constitutes the virtual space, or may be a surface that comprises multiple surfaces. The specific surface includes at least one of a flat surface and a curved surface. The surface information SUI is, for example, information that indicates an indoor or outdoor landscape or background. The surface information SUI is, for example, information about landscapes including the ground, rivers, forests, mountains, and the like.

FIG. 6 is a conceptual diagram illustrating an example of surface information according to an embodiment of the present invention. As shown in FIG. 6, the surface information SUI records in DB112 a surface ID for identifying a specific surface, information on the display form (e.g., color) of the specific surface, and the distance between the virtual viewpoint and the specific surface in association with each other. For example, in the specific surface of surface ID 001, if the distance d between the virtual viewpoint and the specific surface measured by the distance measurement unit 114 shown in FIG. 3 is less than the specific distance d1, the specific surface is displayed in dark green. Also, if the distance d is equal to or greater than the specific distance d1 and less than the specific distance d2, the specific surface is displayed in green. Furthermore, if the distance d is equal to or greater than the specific distance d2, the specific surface is displayed in yellow-green. In this way, the display form of the specific surface changes as the distance d changes.

The display form may include the size and shape of the surface in addition to the color. In other words, the size and shape of a given surface may be controlled in response to a change in the distance d. The surface information SUI includes information for placement in the virtual space (e.g., placement position information, etc.).

DB112 may further record character information, which is information about characters to be placed in the virtual space. The character information includes image information corresponding to a character or avatar that is pre-associated with the user. The character information may be one or more types of characters or avatars (e.g., an image that resembles an animal or an image of a deformed person). The character information also includes information for placing the character or avatar in the virtual space (e.g., position information, etc.).

<Virtual space provision processing>
An example of the virtual space provision process according to the embodiment of the present invention will be described with reference to Fig. 7 and Fig. 8. Fig. 7 is a flowchart showing an example of the virtual space provision process according to the embodiment of the present invention.

(Step S1)
The polygon placement unit 113 of the virtual space providing device 3 shown in FIG. 3 places polygons on a predetermined surface in the virtual space.

Figure 8 shows an example of an image displayed on a playback device according to an embodiment of the present invention. In particular, Figure 8 (A) is a conceptual diagram showing an example of a virtual space 50 when the distance between the virtual camera 60 and the polygon P is short. Figure 8 (B) is a conceptual diagram showing an example of a virtual space 50 when the distance between the virtual camera 60 and the polygon P is long. As shown in Figure 8 (A), the polygon placement unit 113 places a grass polygon P on a specified surface in the virtual space 50. There may be one or more grass polygons P.

(Step S3)
The distance measurement unit 114 of the virtual space providing device 3 shown in FIG. 3 measures the distance between the virtual camera 60 and an area R on a predetermined surface in which polygons are arranged.

(Step S5)
The distance measurement unit 114 judges whether the measured distance is equal to or greater than a predetermined distance. For example, the distance measurement unit 114 judges whether the measured distance is equal to or greater than a predetermined distance d2. The distance measurement unit 114 may also judge whether the screen occupancy rate of the polygon P is equal to or greater than a screen occupancy rate (threshold value) of the polygon P calculated based on the predetermined distance d2. If the measured distance dy is equal to or greater than the predetermined distance d2, or if the screen occupancy rate of the polygon P is equal to or greater than the screen occupancy rate of the polygon P calculated based on the predetermined distance d2 (Yes), the distance measurement unit 114 proceeds to step S7. If No, the process returns to step S3 and the distance measurement process is executed again.

(Step S7)
The polygon display control unit 115 of the virtual space providing device 3 shown in FIG. 3 controls not to display the polygon when the measured distance is equal to or greater than a predetermined distance.

As shown in FIG. 8(B), when the measured distance dy is equal to or greater than a predetermined distance d2, the polygon display control unit 115 controls the non-display of the polygon P arranged in the region R. The non-display control of the polygon P includes control to remove or eliminate the polygon arranged in the virtual space, or, when displaying the polygon arranged in the virtual space, for example, by controlling to increase the transparency (transparency rate) of the polygon so that it cannot be seen by the user.

As shown in FIG. 8, when multiple polygons are arranged, the distance measurement unit 114 may measure the distance between each of the multiple polygons and the virtual camera 60, or may measure the distance between each of multiple arrangement positions of the multiple polygons on a specified surface and the virtual camera 60. Then, the display of each polygon may be controlled separately by comparing each measured distance with a specified distance. In other words, the multiple polygons in region R may include polygons that are controlled to be hidden and polygons that are not controlled to be hidden.

(Step S9)
When controlling non-display of the polygon, the surface display control unit 116 controls the area in which the polygon is arranged on the predetermined surface to be displayed in a display form according to the measured distance.

As shown in FIG. 8(A), for example, referring to the surface information SUI in FIG. 6, in region R on a specific surface with surface ID 001, if the distance dx between the virtual camera 60 and region R measured by the distance measurement unit 114 is less than the specific distance d1, the surface display control unit 116 displays region R in dark green. However, as shown in FIG. 8(B), if the measured distance dy is equal to or greater than the specific distance d2, when controlling the polygon not to be displayed, the surface display control unit 116 displays region R in yellow-green. In this way, the surface display control unit 116 controls region R to be displayed in a display form corresponding to the measured distance based on the measured distance. In other words, the display form of region R changes as the distance changes from dx to dy.

As described above, the DB 112 shown in FIG. 3 associates and records, for each of one or more blocks set by the block setting unit 117, information about the display mode of the specified surface and the distance between the virtual camera 60 and the specified surface. Therefore, when the virtual camera 60 is in a specific block among the one or more blocks, the surface display control unit 116 may perform control so that the area R is displayed in a display mode associated with the specific block and according to the distance based on the measured distance.

With this configuration, the display form of a specific surface (or area) is controlled by referencing information managed for one or more blocks in the virtual space. This allows for more efficient screen drawing.

For convenience, in FIG. 7, steps S7 and S9 are described as separate processes, as if step S9 is executed after step S7. However, in reality, step S9 is executed before step S7. That is, before the polygon non-display control process shown in step S7 is executed, the display form of the area in which the polygon is placed shown in step S9 is controlled. Steps S7 and S9 may also be executed in parallel. That is, while the polygon non-display control process is being executed (e.g., while the transparency of the polygon is being changed), the display form of the area in which the polygon is placed may be controlled to correspond to the progress of the process.

According to the embodiment described above, the distance between the virtual viewpoint and the area on a specific surface of the virtual space where the polygon is arranged is measured, and if the measured distance is equal to or greater than a specific distance, the polygon is hidden, and when the polygon is hidden, the area is controlled to be displayed in a display form according to the measured distance. For example, in the virtual space providing system 1, when a grass polygon far from the virtual viewpoint is hidden, the ground on which the grass polygon is arranged is displayed in a color according to the distance from the virtual viewpoint. This reduces the sense of incongruity when hiding the grass polygon, and enables efficient screen drawing by LOD control processing. Therefore, it is possible to improve the screen display technology when hiding polygons arranged in the virtual space.

Other Embodiments
The above-mentioned embodiments are provided to facilitate understanding of the present invention, and are not to be construed as limiting the present invention. The present invention may be modified or improved (for example, by combining the embodiments, or by omitting some of the configurations of the embodiments) without departing from the spirit of the present invention, and the present invention also includes equivalents thereof.

In this embodiment, as shown in Figs. 5 and 6, the polygon information PI and the surface information SUI are set and managed separately, but this is not limited to the above. For example, the display form of the polygon and the display form of a specific surface may be controlled simultaneously using common parameters.

1 ... virtual space providing system, 3 ... virtual space providing device, 5 ... playback device, 7 ... cable, 9 ... input device, 10 ... wired/wireless interface, 11 ... antenna, 12 ... data processing unit, 14 ... memory, 15 ... hard disk drive,
16: disk drive, 18: recording medium attachment/detachment unit, 19: bus, 50: virtual space, 60: virtual camera, 100: control unit, 111: information processing unit, 112: database (DB), 113: polygon placement unit, 114: distance measurement unit, 115: polygon display control unit, 116: surface display control unit, 117: block setting unit, 118: image generation unit

Claims (6)

The computer that provides the virtual space,
a polygon arrangement unit that arranges polygons on a predetermined surface in the virtual space;
a distance measurement unit that measures the distance between a virtual viewpoint and an area on the predetermined surface in which the polygon is arranged;
a first display control unit that controls a first display form related to a color of the polygon based on the measured distance;
a second display control unit that controls a second display form related to a color of the area that is a control target different from the polygon based on the measured distance;
the second display form is controlled to correspond to the first display form when the polygon is made non-displayable;
program. The computer,
a recording unit that records information about a display form of the predetermined surface and a distance between the virtual viewpoint and the predetermined surface in association with each other;
The second display control unit controls to display the area in the second display mode corresponding to the measured distance based on the measured distance and information related to the display mode recorded in the recording unit .
The program according to claim 1. The computer,
further functioning as an area setting unit for setting one or more areas in the virtual space;
the recording unit records, for each of the areas, information on a display form of the predetermined surface and a distance between the virtual viewpoint and the predetermined surface in association with each other;
When the virtual viewpoint is in a specific area among the areas, the second display control unit controls to display the area in the second display form associated with the specific area and corresponding to the distance based on the measured distance.
The program according to claim 2. The predetermined surface is a ground surface, and the polygon is a plant arranged on the ground surface.
The program according to any one of claims 1 to 3. A virtual space providing method executed by a computer that provides a virtual space, comprising:
arranging polygons on a predetermined surface in the virtual space;
measuring a distance between a virtual viewpoint and an area on the predetermined surface in which the polygon is located;
controlling a first display manner relating to a color of the polygon based on the measured distance;
and controlling a second display mode relating to a color of the region that is a control target different from the polygon, based on the measured distance;
the second display form is controlled to correspond to the first display form when the polygon is made non-displayable;
Method of providing virtual space. A virtual space providing device for providing a virtual space,
a polygon arrangement unit that arranges polygons on a predetermined surface in the virtual space;
a distance measurement unit that measures the distance between a virtual viewpoint and an area on the predetermined surface in which the polygon is arranged;
a first display control unit that controls a first display form related to a color of the polygon based on the measured distance;
a second display control unit that controls a second display mode related to a color of the area that is a control target different from the polygon based on the measured distance,
the second display form is controlled to correspond to the first display form when the polygon is made non-displayable;
Virtual space providing device.

Images