JP2024041355A - Program, virtual space generation device, and virtual space generation method - Google Patents

Abstract

[Problem] To create a natural wind effect in a virtual space. [Solution] A computer is made to function as a calculation unit (562) that calculates a shielding rate, which is the degree to which an object in the virtual space shields virtual wind in the virtual space, within a predetermined range in the virtual space, a determination unit (563) that calculates a wind generation parameter indicating whether or not to generate new virtual wind based on the shielding rate for the predetermined range for which the shielding rate has been calculated, and a wind generation unit (564) that performs a simulation of wind in the virtual space based on the wind generation parameter. [Selected Figure] Figure 1

Description

The present disclosure relates to a program, a virtual space generation device, and a virtual space generation method.

Some game programs generate virtual wind in a virtual space (for example, see Patent Document 1). In the example of Patent Document 1, a plurality of wind generation sources are set at a given position in an object space (virtual space), and the wind force generated from each generation source is determined at regular time intervals.

Japanese Patent Application Publication No. 2001-276416

In the example of Patent Document 1, wind shields are not considered. Therefore, the wind may blow even in unnatural places in the virtual space. In the example of Patent Document 1, there is a possibility that an effect that lacks realism will be performed.

An object of the present disclosure is to enable the production of natural wind in a virtual space.

The first aspect is that the computer is
a calculation unit that calculates a shielding rate, which is the extent to which an object in the virtual space blocks virtual wind in the virtual space, in a predetermined range in the virtual space;
a determining unit that calculates a wind generation parameter indicating whether or not to newly generate the virtual wind based on the shielding rate for the predetermined range in which the shielding rate has been calculated;
This program functions as a wind generation unit that performs a wind simulation in the virtual space based on the wind generation parameters.

In a first aspect, the determining unit may determine the wind generation parameter for a predetermined area around the predetermined range.

In the aspect, the calculation unit may determine the predetermined range based on the shape of the object.

In the above aspect,
The calculation unit is
The object is discretized and represented by a plurality of first volume elements,
When the part of the object included in each first volume element is discretized and represented by a second volume element having a smaller volume than the first volume element,
The number of the second volume elements included in the first volume element may be determined as the shielding rate of the first volume element.

In the above aspect,
The computer may function as a game progression unit that advances the game in the virtual space based on user operations.

In the above aspect,
Based on the result of the simulation, the computer may function as a sound processing unit that reproduces the sound based on the wind.

A second aspect includes a storage unit storing the program according to the aspect;
a control unit that executes the program;
This is a virtual space generation device equipped with

In a third aspect, by a computer,
calculating a shielding rate, which is the extent to which an object in the virtual space blocks virtual wind in the virtual space, in a predetermined range in the virtual space;
a determining step of determining a wind generation parameter indicating whether or not to newly generate the virtual wind based on the shielding rate for the predetermined range in which the shielding rate has been calculated;
The present invention is a virtual space generation method that executes a wind generation step of performing a wind simulation in the virtual space based on the wind generation parameters.

According to the present disclosure, it is possible to produce a natural breeze in a virtual space.

FIG. 2 is a block diagram showing the configuration of a game device. FIG. 3 is a diagram illustrating discretization of objects using bricks. 3 is a side view of the object of FIG. 2; FIG. FIG. 3 is a diagram illustrating discretization of objects using cells. FIG. 3 is a diagram illustrating bricks placed in an area where no object exists.

[Embodiment]
Embodiments of a program, a virtual space generation device, and a virtual space generation method will be described below. In the embodiment, the program is implemented as a game program. The virtual space generation device is realized as a game device. The virtual space generation method is implemented in a game device that executes a game program.

A game based on this game program is played in a virtual space (three-dimensional). There are no restrictions on the type of game. For example, the game can be a competitive action game in which the player character attacks and defeats enemy characters.

《Game device configuration》
<Hardware configuration>
FIG. 1 is a block diagram showing the configuration of the game device 5. As shown in FIG. Game device 5 executes a predetermined game based on a user's operation. A display 61, a speaker 62, and a controller 63 are externally connected or built into the game device 5.

As the game device 5, commercially available devices such as a personal computer, PlayStation (registered trademark), XBox (registered trademark), PlayStation Vita (registered trademark), and Nintendo Switch (registered trademark) can be used.

In the game device 5, the game progresses based on the installed game program and game data. The game devices 5 can also perform data communication with each other using a communication network (not shown) or a short-range wireless communication device (not shown).

The game device 5 includes a network interface 51, a graphic processing section 52, an audio processing section 53, an operation section 54, a storage section 55, and a control section 56. The network interface 51, the graphic processing section 52, the audio processing section 53, the operation section 54, and the storage section 55 are electrically connected to the control section 56 via a bus 59.

The network interface 51 is communicably connected to the communication network in order to transmit and receive various data with, for example, other game devices 5 and an external server device (not shown).

The graphic processing unit 52 draws a game image including a player character and various objects in the virtual space in a moving image format according to the game image information output from the control unit 56. The graphic processing unit 52 is connected to a display 61 (for example, a liquid crystal display). The game image drawn in a moving image format is displayed on the display 61 as a game screen.

In this game program, a virtual camera (hereinafter referred to as virtual camera C) is set in the virtual space as the user's (player's) viewpoint. The graphic processing unit 52 composes a 3D video (moving image) and displays it on the display 61 as if the inside of the virtual space was photographed by the virtual camera C. The direction, magnification, etc. of the virtual camera C can be set by the user via the controller 63.

The audio processing section 53 is connected to the speaker 62. The audio processing unit 53 reproduces digital game audio according to instructions from the control unit 56. Specifically, the audio processing unit 53 converts the audio data output by the control unit 56 into an analog signal and outputs it to the speaker 62.

The audio processing unit 53 is configured to output multi-channel audio in order to reproduce three-dimensional sound. Accordingly, a plurality of speakers 62 are connected to the game device 5. These speakers 62 may be placed on the left, right, front, back, or above the listener (for example, a game player) so that three-dimensional sound can be reproduced.

The operation unit 54 is connected to the controller 63. The operation unit 54 transmits and receives signals to and from the controller 63. A game player inputs signals (commands, data, etc.) to the game device 5 by operating various operators such as buttons on the controller 63.

The storage unit 55 includes an HDD, SSD, RAM, ROM, and the like. The storage unit 55 stores game data, various programs including game programs, and the like. Examples of game data include game media and user account information.

The control unit 56 controls the operation of the game device 5. The control unit 56 includes a CPU (microcomputer) and a semiconductor memory. The semiconductor memory stores programs, data, etc. for operating the CPU.

<Functional configuration of control unit 56>
The control unit 56 functions as a game progression unit 561, a calculation unit 562, a determination unit 563, a wind generation unit 564, a display unit 565, and a sound processing unit 566 by executing the game program (see FIG. 1).

-Game progress section 561-
The game progression unit 561 causes the player character to move within the virtual space in response to operations by the user (here, the game player). The game progression unit 561 also causes non-player characters and predetermined objects (such as vehicles) to operate in the virtual space.

The game progress unit 561 controls the actions of non-player characters and predetermined objects using, for example, AI (artificial intelligence). The game progression unit 561 advances the game according to the actions of the player character and the non-player character.

-Calculation unit 562-
The calculation unit 562 calculates the shielding rate in a predetermined range (hereinafter referred to as calculation range) in the virtual space in real time during the game (calculation step). The shielding rate is a value indicating the degree to which an object in the virtual space shields the virtual wind in the virtual space. The method for calculating the shielding rate will be described later.

The calculation unit 562 calculates the shielding rate while moving the calculation range according to the movement of the player character. The calculation range may be set within the range of the virtual space displayed on the display 61 (hereinafter referred to as the display range).

The calculation unit 562 determines a part of the calculation range based on the shape of the object within the display range. Examples of such objects include buildings (houses, walls, etc.) placed in the virtual space, and terrain (cliffs, cave walls, etc.) set in the virtual space.

The calculation unit 562 discretizes and represents the object using a plurality of volume elements (hereinafter referred to as first volume elements) in order to define (a part of) the calculation range. Below, the first volume element may be referred to as a brick.

FIG. 2 is a diagram illustrating discretization of objects using bricks. In FIG. 2, an object OBJ in the virtual space VS is shown in a perspective view. Object OBJ is a step-like object.

In FIG. 2, each cube indicated by a broken line is a brick V1 (first volume element). These bricks V1 are not visible to the user (here, the game player) (they are not displayed on the display 61).

FIG. 3 is a side view of object OBJ in FIG. 2. In FIG. 3, the brick V1 is also indicated by a broken line. Each brick V1 illustrated in FIGS. 2 and 3 includes a portion (part) of the object OBJ.

The calculation unit 562 discretizes and represents the object using a volume element (referred to as a second volume element) having a smaller volume than the first volume element. In other words, the calculation unit 562 discretizes the part of the object included in each first volume element into a second volume element having a smaller volume than the first volume element. Below, the second volume element may be referred to as a cell.

FIG. 4 is a diagram illustrating discretization of objects using cells. FIG. 4 is a side view of object OBJ in FIG. 2. In FIG. 4, a branch number is attached to the reference numeral (for example, V1-1, V1-2, etc.) in order to identify a predetermined brick V1.

In FIG. 4, the cube contained within the brick V1 is the cell V2 (second volume element). In FIG. 4, cell V2 is represented by a dashed square. These cells V2 are not visible to the user (here, the game player) (they are not displayed on the display 61).

The calculation unit 562 calculates the shielding rate for each brick V1 whose object is discretized. Specifically, the calculation unit 562 sequentially focuses on the bricks V1 in which the object is discretized, and calculates the number of cells V2 (second volume elements) included in the focused brick V1 (first volume element) as the number of cells V2 (second volume elements) included in the brick V1. It is calculated as the shielding rate at .

For convenience of explanation, in the example of FIG. 4, it is assumed that the length of one side of the cell V2 is 1/5 of the length of one side of the brick V1. In this case, the maximum number of cells V2 that brick V1 can include is 5×5×5=125. Each brick V1 in FIG. 4 can include up to five cells in the vertical direction of the plane of the drawing.

For example, in brick V1-1, it is assumed that five cells V2 are connected in the vertical direction of the plane of the figure at each position of the 17 cells V2 in brick V1-1 that can be seen in FIG. In this case, the shielding rate in brick V1-1 is 17×5=85.

Further, in brick V1-2, it is assumed that five cells V2 are connected in the vertical direction of the plane of the figure at each position of the 25 cells V2 in brick V1-2 that can be seen in FIG. In this case, the shielding rate in brick V1-2 is 25×5=125 (maximum number).

The calculation unit 562 also arranges the bricks V1 in areas where no objects exist (limited to areas within the display range, for example). FIG. 5 is a diagram illustrating bricks V1-3 to V1-9 placed in an area where no object exists.

In reality, more bricks V1 are placed in the area where no object exists, but for convenience of illustration, only some of the bricks V1-3 to V1-9 are shown in FIG. Note that the placement of the brick V1 at the location where the object does not exist may be performed simultaneously or consecutively with the discretization of the object using the brick V1.

The calculation unit 562 also calculates the occlusion rate for the brick V1 in the area where no object exists. Specifically, the calculation unit 562 uses the occlusion rate calculated corresponding to the object to complement (extrapolate) the occlusion rate in the brick V1 in the area where the object does not exist.

For example, the calculation unit 562 complements the shading rate according to a rule (calculation formula) such that the shading rate is smaller on areas such as the ground where nothing is present. The calculation unit 562 complements the shading rate according to a rule such that the shading rate is relatively large in areas with complex terrain. Note that the program may be implemented to stop the interpolation when the complemented shading rate falls below a predetermined value, for example.

-Decision section 563-
The determining unit 563 determines whether new wind needs to be generated at a predetermined location in the virtual space. Specifically, the determining unit 563 determines wind generation parameters corresponding to each shielding rate in real time during the game (determining step). The wind generation parameter is a parameter indicating whether or not virtual wind is newly generated at a predetermined location in the virtual space.

In this game program, "generating wind" in virtual space means the following two things.

(1) Calculating wind-related characteristics (wind speed, wind pressure, etc.) using some method Calculation of wind-related characteristics can be realized, for example, by fluid simulation.

(2) Utilizing wind-related characteristics in virtual space Examples of ways to use wind-related characteristics include visualization of wind in virtual space and reproduction of sounds generated by wind.

Visualization of the wind can be realized by displaying the movement of objects (including characters) on the screen (display 61). For example, the wind can be visualized by displaying on the display 61 the swaying of a character's hair, the swaying of tree branches and leaves, the swaying of grass, the appearance of a blizzard, the flow of fog, and the like. Examples of the reproduction of sounds caused by the wind include wind noise, the wind of a blizzard, and the reproduction of the sound of swaying tree leaves.

The determining unit 563 compares the shielding rate with the threshold value in order to obtain the wind generation parameter. The determining unit 563 generates a wind generation parameter that means that wind is generated when the shielding rate is less than or equal to a threshold value. The determining unit 563 generates a wind generation parameter that means that no wind is generated when the shielding rate is larger than the threshold value.

This threshold value may be arbitrarily determined by the game program developer. Further, the threshold value may be dynamically changed during operation of the game program.

The determining unit 563 stores the wind generation parameters in a semiconductor memory. The data format of the wind generation parameters stored in the semiconductor memory is determined so that they can be searched using information that specifies the brick V1 (for example, the ID number of the brick V1) as a query.

-Wind generating part 564-
The wind generator 564 generates wind in virtual space. Specifically, the wind generation unit 564 performs fluid simulation for the calculation range in response to the movement of the player character (in other words, movement of the calculation range) during execution of the game. In other words, the wind generation unit 564 calculates characteristics related to wind.

The wind generator 564 sets parameters for fluid simulation when performing fluid simulation. Examples of fluid simulation parameters include conditions that define the wind that blows in the entire virtual space (wide-area wind), physical property values and pressure values of virtual gas that fills the virtual space. As the physical property value of the virtual gas, for example, the physical property value of air can be adopted.

The wind generation unit 564 performs a fluid simulation for the virtual gas filling the virtual space based on the wind generation parameters corresponding to each of the first volume elements V1 (wind generation step).

First, when setting the fluid simulation parameters, the wind generation unit 564 checks the wind generation parameters corresponding to each brick V1. The wind generation unit 564 sets fluid simulation parameters as follows according to the confirmed wind generation parameters.

(1) When the wind generation parameter means to generate wind The wind generation unit 564 generates a new wind at the position of the brick V1 (hereinafter referred to as the position of interest) corresponding to the wind generation parameter. Set parameters for fluid simulation.

(2) When the wind generation parameter means that no wind is generated The wind generation unit 564 sets the fluid simulation parameters so that no new wind is generated at the position of interest.

Note that in the fluid simulation, "wind occurs" means that the calculated wind-related characteristics indicate the presence of wind. For example, it may be said that "wind occurs" when the wind speed is equal to or higher than a predetermined value. Furthermore, in the fluid simulation results, "no wind occurs" means that the calculated wind-related characteristics are the absence of wind. For example, if the wind speed is lower than a predetermined value, it may be said that "no wind is generated."

The wind generation unit 564 performs a fluid simulation for virtual gas using the set fluid simulation parameters. As a result, characteristics related to wind (for example, wind speed) in the virtual space VS are calculated. The wind generating section 564 outputs the results of the fluid simulation to the display section 565 and the sound processing section 566.

-Display section 565-
The display unit 565 visualizes the wind in the virtual space according to the fluid simulation results. In other words, the display unit 565 generates wind in the virtual space. For example, the display unit 565 generates moving image data (game image information) in which the hair of the player character is fluttering, or the grass and leaves of trees in a meadow are swaying, depending on the fluid simulation result (for example, wind speed).

The display unit 565 outputs the generated moving image data to the graphic processing unit 52. The graphic processing unit 52 draws the moving image data on the display 61 in moving image format.

-Sound processing section 566-
In this game program, various audio data are prepared in advance. The audio processing unit 566 reproduces audio data according to the progress of the game. Specifically, the audio processing unit 566 selects audio data according to the progress of the game, and outputs the selected audio data to the audio processing unit 53.

When outputting audio data, the audio processing unit 566 instructs the audio processing unit 53 about the volume. The audio processing section 53 converts the audio data outputted by the acoustic processing section 566 into an analog signal of a specified volume, and outputs it to the speaker 62.

The sound processing unit 566 performs sound image localization during audio reproduction. The acoustic processing unit 566 sets a virtual sound receiving point (hereinafter referred to as virtual microphone L) in the virtual space where the sound is heard in order to perform sound image localization. In this example, the virtual microphone L is set near the player character. The virtual microphone L has directivity. The virtual microphone L moves as the player character moves. The direction of the virtual microphone L is linked to the direction of the virtual camera C.

In this game program, an acoustic presentation is performed so that the sound appears to be emitted from a virtual sound source existing in a virtual space. The sound processing unit 566 outputs the sound emitted from a virtual sound source (such as a weapon owned by the player character) to the speaker 62 in an acoustic representation as if the sound was collected by the virtual microphone L. The virtual microphone L is a virtual listener and is a reference point for sound image localization by the acoustic processing unit 566.

The sound processing unit 566 expresses the wind in the virtual space using sound effects according to the fluid simulation results. In other words, the sound processing unit 566 generates wind in the virtual space. For example, the sound processing unit 566 generates audio data representing wind noise, the sound of swaying tree leaves, etc., depending on the wind speed and wind direction calculated by the fluid simulation.

The sound processing unit 566 changes the content of the sound processing depending on the wind speed. For example, the sound processing unit 566 controls the volume of wind sound depending on the wind speed.

The acoustic processing unit 566 changes the content of the acoustic processing according to the relationship between the wind direction and the direction of the virtual microphone L (orientation of the virtual camera C). For example, suppose that it is calculated by simulation that at the position of the virtual microphone L, the wind blows from behind the virtual microphone L toward the front thereof. In other words, the wind blows from behind the virtual camera C toward the front.

In this case, the sound processing unit 566 performs processing so that the sound of the wind is heard as a muffled sound. Specifically, the acoustic processing unit 566 processes the wind audio data using a low-pass filter.

For example, assume that it has been calculated by simulation that the wind blows from the right side of the virtual microphone L toward the left side at the position of the virtual microphone L. In this case, the sound processing unit 566 lowers the volume of the sound on the left side (the sound from the left speaker 62) than the sound on the right side (the sound from the right speaker 62).

In addition, the sound processing unit 566 may change the pitch of the sound caused by the wind depending on the simulation results (wind speed, wind direction).

The audio processing unit 566 outputs the generated audio data to the audio processing unit 53. The audio processing section 53 converts the audio data output by the acoustic processing section 566 into an analog signal and outputs it to the speaker 62.

《Operation example》
When the game starts, the game progression unit 561 causes the player character to move within the virtual space VS in response to the operation of the controller 63 by the user (here, the game player). The game progression unit 561 also causes objects such as non-player characters to operate in the virtual space as necessary.

For example, the calculation unit 562 arranges the brick V1 and the cell V2 in the display range of the virtual space VS. The calculation unit 562 calculates the shielding rate for each brick V1.

The determining unit 563 determines a wind generation parameter corresponding to the shielding rate calculated by the calculating unit 562. The determining unit 563 stores the calculated wind generation parameters in a semiconductor memory.

The wind generation unit 564 sets fluid simulation parameters based on the calculated wind generation parameters. The wind generator 564 performs fluid simulation based on the set fluid simulation parameters. The wind generation section 564 outputs the results of the fluid simulation to the display section 565 and the sound processing section 566.

The display unit 565 generates moving image data (game image information) in which, for example, grass in a meadow or leaves of trees shake, according to the result of the fluid simulation. The display unit 565 outputs the generated moving image data to the graphic processing unit 52. As a result, grass and leaves swaying in the wind are displayed on the display 61.

The sound processing unit 566 generates audio data representing, for example, the sound of swaying tree leaves, depending on the wind speed and wind direction calculated by the fluid simulation. The audio processing unit 566 outputs the generated audio data to the audio processing unit 53. As a result, the speaker 62 reproduces the sound of leaves swaying in the wind.

This game program uses simulation results to play back audio, so the audio and moving images are linked. In other words, there is no sense of incongruity between the movement of the image and the sound.

To summarize the above, the present aspect causes the computer (control unit 56) to determine the shielding rate, which is the extent to which an object in the virtual space blocks the virtual wind in the virtual space, in a predetermined range in the virtual space. a calculation unit 562; a determining unit 563 that calculates a wind generation parameter indicating whether or not to newly generate the virtual wind based on the shielding rate for the predetermined range in which the shielding rate has been calculated; This is a program that functions as a wind generation unit 564 that simulates wind in the virtual space based on generation parameters.

《Effects of this embodiment》
This program introduces the concept of shielding rate. The shielding rate is calculated in real time during the game (while the game program is being executed). The shielding rate indicates the extent to which virtual wind is shielded at a predetermined location in the virtual space. This program does not generate new wind in locations where the shielding rate is greater than the threshold (locations where wind is likely to be shielded). This program generates new wind at locations where the shielding rate is lower than the threshold.

By introducing the concept of occlusion rate, this program can create a natural wind effect in virtual space. For example, with this program, by generating wind according to the shielding rate, it is possible to suppress unnatural wind from being generated from walls. By generating wind according to the shielding rate, this program can prevent wind (for example, drafts) in complex terrain from disappearing (overwriting) by wide-area winds. With this program, by adjusting the threshold value for comparison with the occlusion rate, it is possible to emphasize the wind in a predetermined range.

Additionally, in this program, audio and moving images are linked. Therefore, in this program, there is no sense of incongruity between the movement of images and the sound.

As mentioned above, this program can produce natural wind effects in real time in virtual space.

If wind effects can be performed in real time, there is no need to prepare and distribute data representing wind (wind speed, wind direction, etc.) to users in advance. In other words, this program requires less data volume to be distributed to users.

[Other embodiments]
The use of the virtual space is not limited to games. The administrator of the virtual space (which may be called the user of this program) can provide various services through the virtual space (for example, use as a so-called metaverse).

The use of the mechanism of this program (the mechanism for determining whether or not new wind generation is necessary) is not limited to programs (for example, game programs) used by users of the virtual space (here, those receiving services in the virtual space). For example, the structure of this program can be used as a game development tool used when developing games.

In the game development tool, developers (programmers, artists, etc.) who are users of this program can easily perform advance preparation work regarding wind. Preparation includes, for example, preparing data representing wind, performing fluid simulation, etc. If advance preparation becomes easier, it becomes possible to reduce the cost required for repeating the development process (so-called iteration).

Bricks and cells may be visualized depending on the use of this program. For example, when implementing this program as a game development tool, visualizing bricks and cells improves convenience for users (artists, etc.).

The calculation range of the shielding rate is not limited to the display range described above. The calculation range may be an area obtained by expanding the display range to some extent, or may be a range narrower than the display range. Further, an area that is not displayed on the display 61 (for example, an area where the player character is expected to move) may be set as the calculation range.

In a game development tool, the shielding rate or wind generation parameter may be manually embedded into the virtual space by an artist or the like. A mechanism may be provided in which an artist or the like can apply a bias to the shielding rate calculated by the computer (control unit 56).

The method of calculating the shielding rate described in the embodiment is an example. For example, the shielding rate may be a ratio between the maximum number of second volume elements that can be included in the first volume element and the number of second volume elements V2 that are actually included in the first volume element V1.

The correspondence between the value of the shielding rate and its meaning (necessity of wind generation) is an example. For example, contrary to the embodiment described above, the method for calculating the shielding rate may be changed so that a new wind is generated when the shielding rate is larger than the threshold value, and no new wind is generated when the shielding ratio is smaller than the threshold value. May be defined. As such a definition, for example, the shielding rate may be the reciprocal of the number of second volume elements V2 included in the first volume element V1.

Processing by this program may be performed by a server device to which a user device (for example, game device 5) is connected, or may be shared between the user device and the server device. This form is a form assumed when this program is implemented as a game program for an online game or a program for the above-mentioned metaverse.

The audio data does not necessarily need to be prepared in advance. They may be synthesized or generated each time based on some data (for example, noise) or information.

Even when these other embodiments are adopted, the effects of this aspect can be achieved. Moreover, it is also possible to combine this embodiment with other embodiments, or with other embodiments, as appropriate.

5 Game device (virtual space generation device)
55 Storage section
56 Control unit (computer)
561 Game progress department
562 Calculation part
563 Decision section
564 Wind generator
566 Sound processing section
OBJ object
V1 brick (first volume element)
V2 cell (second volume element)
VS virtual space

Claims (8)

computer,
a calculation unit that calculates a shielding rate, which is the extent to which an object in the virtual space blocks virtual wind in the virtual space, in a predetermined range in the virtual space;
a determining unit that calculates a wind generation parameter indicating whether or not to newly generate the virtual wind based on the shielding rate for the predetermined range in which the shielding rate has been calculated;
A program that functions as a wind generation unit that performs a wind simulation in the virtual space based on the wind generation parameters. In the program of claim 1,
The determining unit determines the wind generation parameter for a predetermined area around the predetermined range. In the program of claim 1 or claim 2,
The calculation unit determines the predetermined range based on the shape of the object. In the program of claim 3,
The calculation unit is
The object is discretized and represented by a plurality of first volume elements,
When the part of the object included in each first volume element is discretized and represented by a second volume element having a smaller volume than the first volume element,
A program that calculates the number of the second volume elements included in the first volume element as the shielding rate of the first volume element. In the program of claim 1 or claim 2,
A program that causes the computer to function as a game progression unit that advances a game in the virtual space based on user operations. In the program of claim 1 or claim 2,
A program that causes the computer to function as a sound processing unit that reproduces sound based on the wind based on a result of the simulation. A storage unit storing the program according to claim 1 or claim 2;
a control unit that executes the program;
A virtual space generation device equipped with by computer,
calculating a shielding rate, which is the extent to which an object in the virtual space blocks virtual wind in the virtual space, in a predetermined range in the virtual space;
a determining step of determining a wind generation parameter indicating whether or not to newly generate the virtual wind based on the shielding rate for the predetermined range in which the shielding rate has been calculated;
A virtual space generation method that performs a wind generation step of performing a wind simulation in the virtual space based on the wind generation parameters.