JP6374908B2 - Game program and game system - Google Patents

Description

  The present invention relates to a game program and a game system for controlling character movement in a virtual game space.

  Conventionally, there are games such as an action game and a role playing game that cause a player character to move in a virtual game space in response to a user operation. In such a game, when an attack is performed using a gun, when the gunshot is heard, the enemy character (a character operated by another user or a non-player character controlled by a computer) moves the position of the player character. Some have game characteristics to be grasped. Furthermore, in such a game, a silencer (also referred to as a suppressor) that is effective in reducing gunshots can be installed. When the silencer is installed, even if an attack is performed using a gun, There are also known modes that have the effect of making it difficult to grasp the position (for example, Activision Blizzard (“Activ of Blizzard”), “Call of Duty” series, etc.). In this way, a more realistic game is provided by providing a game property corresponding to the actual effect of the actual equipment.

  However, there are cases where it is not possible to realize a game that is realistic enough by simply reducing the sound.

  It is an object of the present invention to provide a game program and a game system that can provide more realistic game performance.

  A game program according to one aspect of the present invention outputs a sound generated from a sound source arranged in the virtual space and a display unit that displays an image captured by a virtual camera arranged in the virtual space as a game screen. A game program to be executed by a computer in a game system including a sound output unit and a computer, wherein the computer has virtual space generation means for generating a virtual space, and a sound source of a predetermined sound is arranged in the virtual space Generated from the sound source, an angle calculation unit that calculates an angle formed by a virtual line extending from the sound source in a predetermined direction and a line segment connecting the sound listening position and the sound source position in the virtual space. Sound generating means for generating sound to be performed, and sound processing means for performing acoustic processing on the sound according to the angle.

  The sound processing means may attenuate the sound as the angle increases.

  The sound processing means may perform the acoustic processing by applying a low-pass filter that cuts the sound above a reference frequency of the sound to the sound, and the reference frequency may be determined according to the angle.

  The sound source of the predetermined sound may be set as a directional sound source.

  The directional sound source is a projectile launching unit that launches a projectile in the predetermined direction, the sound output unit includes a pair of left and right sound output units, and the game system acts in the virtual space. An operation unit for operating the player character, wherein the game program controls the computer based on a character control means for controlling the action of the player character based on an operation of the operation unit by a user, and the flying object is placed on the player character. In the case of contact, it is made to function as an effect expression executing means for effect expression including the generation of a sound effect based on the contact of the flying object, and the effect expression executing means is configured such that the launching point of the flying object faces the player character. Depending on whether it is located on the left or right side with respect to the direction in which it is located, the launch point of the flying object of the pair of left and right sound output units is The sound effect may be reproduced such that the volume of the sound effect output from the sound output section of the side that location is output greater than the volume of the sound effect output from the other sound output unit.

  A game system according to another aspect of the present invention includes a program storage unit that stores the above-described game program, and a computer that executes the program stored in the program storage unit.

  According to the present invention, it is possible to provide a game program and a game system that can provide more realistic game performance.

It is a block diagram which shows the hardware constitutions of the game device in this Embodiment. It is a block diagram which shows the functional structure of the game device shown in FIG. It is a top view which shows an example of the virtual space in the game in this Embodiment. It is a graph which shows attenuation | damping of the sound volume with respect to angle (theta) of the acoustic process in this Embodiment. It is a graph which shows the concept at the time of applying a low-pass filter to the waveform of the sound used as the object of the acoustic process in the modification of this Embodiment. It is a graph which shows the change with respect to angle (theta) of the cutoff frequency of the low-pass filter shown in FIG.

  Hereinafter, a game program and a game system according to embodiments of the present invention will be described with reference to the drawings.

[Game Overview]
In the following description, an action game executed in a home game device will be described as an example. The action game according to the present embodiment achieves a predetermined goal such as operating a player character acting in a virtual game space to annihilate the enemy character or reach a predetermined position in the game space. Therefore, it progresses by fighting an enemy character.

  In this game, an image around the position of the player character that can be operated by the user on the game space is displayed as a game screen. The player character itself may or may not be displayed. While the main game that allows the user to operate the player character is in progress, a sound source having a directional sound, which will be described later, is set in accordance with the equipment and operation of the player, and the directivity from the sound source is set. A sound (sound effect) is played.

[Hardware configuration]
A configuration of a game device that realizes the above-described game will be described. The game system according to the present embodiment includes the following game device 2 and external devices such as a monitor (display unit) 19, a speaker 22, and a controller (operation unit) 24 connected to the game device 2. A game can be played based on the game program 30a and the game data 30b read from the type storage medium 30. However, in the following, in order to simplify the description, the game device 2 may be simply referred to.

  FIG. 1 is a block diagram showing a hardware configuration of game device 2 in the present embodiment. As shown in FIG. 1, the game apparatus 2 can communicate with another game apparatus 2 and the server apparatus 3 via a communication network NW such as the Internet or a LAN. The game apparatus 2 includes a CPU 10 that is a computer for controlling the operation thereof, and a disk drive 12, a memory card slot 13, an HDD 14 that constitutes a program storage unit, a ROM 15, and a RAM 16 are connected to the CPU 10 via a bus 11. Yes.

  Further, the graphic processing unit 17, the audio synthesis unit 20, the wireless communication control unit 23, and the network interface 25 are connected to the CPU 10 via the bus 11.

  Among these, the graphic processing unit 17 draws a game image including a game space and each character in accordance with an instruction from the CPU 10. An external monitor 19 is connected to the graphic processing unit 17 via a video conversion unit 18, and the game image drawn by the graphic processing unit 17 is converted into a moving image format by the video conversion unit 18, and the monitor 19 Is displayed.

  The audio synthesizing unit 20 reproduces and synthesizes digital game sound in accordance with instructions from the CPU 10. An external speaker 22 is connected to the audio synthesis unit 20 via an audio conversion unit 21. Therefore, the game sound reproduced and synthesized by the audio synthesizing unit 20 is decoded into an analog format by the audio converting unit 21 and further outputted from the speaker 22 to the outside. The speaker 22 serves as a sound output unit that outputs sound after acoustic processing described later to the outside. Note that the game sound is configured to correspond to stereo output or surround output that can be output from a plurality of speakers 22 in advance. For this reason, the CPU 10 determines at which predetermined timing (for example, every several frames) which speaker 22 outputs each sound data constituting the game sound. The speaker 22 in this embodiment is provided with at least a pair of left and right, and is configured to be capable of stereo output.

  Furthermore, the audio synthesizing unit 20 converts the user's voice or the like input from the microphone 26 provided in the headset or the controller 24 connected to the game apparatus 2 into the digital format by the audio converting unit 21. It can be acquired. The audio synthesizing unit 20 can transmit the acquired data to the CPU 10 as input information.

  The wireless communication control unit 23 includes a 2.4 GHz band wireless communication module, and is wirelessly connected to the controller 24 attached to the game apparatus 2 so that data can be transmitted and received. The user can input a signal to the game apparatus 2 by operating an operator such as a button provided on the controller 24, and can control the action of the player character displayed on the monitor 19. . The network interface 25 connects the game apparatus 2 to a communication network NW such as the Internet or a LAN, and can communicate with another game apparatus 2 or the server apparatus 3. Then, by connecting the game apparatus 2 to another game apparatus 2 via the communication network NW and transmitting / receiving data to / from each other, a plurality of player characters can be displayed synchronously in the same game space. Thereby, in this game, multiplayer is possible in which a plurality of player characters corresponding to a plurality of users cooperate with each other to fight against enemy characters, or a plurality of users battle against each other.

[Functional configuration of game device]
FIG. 2 is a block diagram showing a functional configuration of the game apparatus 2 shown in FIG. As shown in FIG. 1, the game apparatus 2 includes a control unit 4 including a CPU 10, an HDD 14, a ROM 15, a RAM 16, a graphic processing unit 17, a video conversion unit 18, an audio synthesis unit 20, an audio conversion unit 21, a network interface 25, and the like. Act as a computer. Then, as shown in FIG. 2, the control unit 4 of the game apparatus 2 executes the game program 30a of the present invention, so that the virtual space generation unit 41, the sound source arrangement unit 42, the angle calculation unit 43, and the sound generation unit 44 are performed. The functions of the sound processing means 45, the character control means 46, the effect expression executing means 47 and the like are exhibited.

  Among these, the virtual space generation means 41 generates a virtual space (game space) in which the player character operated by the user acts. The virtual space generation unit 41 generates a virtual game space in which the character moves and each character that moves in the game space, and displays the character on the monitor 19. For example, the virtual space generation means 41 reads data such as objects and textures included in the game data 30b as the player character moves, and generates a three-dimensional virtual game space. Further, the virtual space generation unit 41 generates a two-dimensional image when the image is taken with a predetermined virtual camera arranged in the generated game space in order to display the game space on the monitor 19 of the game apparatus 2. Display as a game screen.

  The character control means 46 controls at least the action of the character (player character) corresponding to the user operating the computer according to the operation input of the controller 24 by the user or the progress of the game. Based on at least one specific operation of the user input through the controller 24, the player character performs a predetermined action determined for the specific operation. When it is determined that a specific operation has been performed based on an input operation to the controller 24 by the user, the character control unit 46 causes the player character to execute a corresponding predetermined action. Furthermore, the character control means 46 controls the motion of the non-player character acting in the game space.

  The sound generator 44 generates sound (sound effect) generated from a sound source arranged in the virtual space. The generated sound is output from the speaker 22. At least some of the objects arranged in the virtual space are set as sound generation sources. For example, when the position of the object set as the sound generation source is within the visual field of the virtual camera, sound is generated from the sound generation source. However, the present invention is not limited to this, and the region where sound is generated from the sound source may be wider or narrower than the visual field of the virtual camera, but the region is arranged at a predetermined position in the virtual space. It is determined based on the listening position of the sound. Further, the sound generation source does not necessarily have to be set in association with the object. For example, a sound source may be set at predetermined position coordinates in the virtual space. The sound generated from the sound generation source arranged in the virtual space is detected at the sound listening position and output from the speaker 22 of the game apparatus 2.

  The sound source includes a sound source of a predetermined sound that is a target of acoustic processing described later. The predetermined sound becomes a directional sound by performing acoustic processing. Such sound sources with directivity include, for example, a flying object launching unit that launches a flying object in a predetermined direction such as a gun, a bow, and a blowing arrow, a siren, a megaphone, and a voice.

  The sound source arrangement means 42 arranges the sound source having the directivity as described above in the virtual space. The angle calculation means 43 calculates an angle formed by a virtual line extending in a predetermined direction from the position of the sound source and a line segment connecting the sound listening position and the sound source position in the virtual space. The sound processing unit 45 performs acoustic processing on the predetermined sound according to the angle calculated by the angle calculating unit 43.

  In addition, when the flying object such as a bullet comes into contact with the player character PL, the effect expression executing unit 47 performs an effect expression including reproduction of a sound effect based on the contact of the flying object.

[Sound processing]
FIG. 3 is a plan view showing an example of the virtual space in the game according to the present embodiment. As shown in FIG. 3, in the virtual space S, a player character PL and an enemy character E1 are arranged. The player character PL performs a specific action such as walking or using the possessed weapon W1 based on a user operation on the controller 24. The action of the enemy character E1 is controlled by the character control means 46 and moves toward the player character PL, and performs a specific action such as attacking the player character PL using the weapon W2. In the example of FIG. 3, an obstacle (bush) Z is provided between the player character PL and the enemy character E1, and it is difficult for the player character PL to visually recognize the enemy character E1.

  A virtual camera VC for imaging the virtual space S is arranged at a predetermined position in the virtual space S near the player character PL (in the example of FIG. 3, behind the player character PL). The two-dimensional image of the virtual space S captured by the virtual camera VC is displayed as a game screen. The game is an action game in which the user operates the player character PL while fighting with the enemy character E1 while watching the game screen and subjugates it.

  The positional relationship between the player character PL and the virtual camera VC is associated with each other. Specifically, the virtual camera VC is kept at a predetermined distance from the player character PL, and the field of view when viewed in plan is centered on a line connecting the virtual camera VC and the player character PL. The axis is set to have a predetermined angle on the left and right. A virtual space S within the field of view of the virtual camera VC is displayed on the game screen. Note that the virtual camera VC is normally controlled so that the center axis of the visual field is in the direction of the player character PL in a state of being separated from the player character PL by a predetermined distance. The virtual camera VC is controlled to be able to turn three-dimensionally with the virtual camera VC facing the player character PL around the player character PL, either automatically or in response to an operation on the controller 24. That is, control is performed so that the position of the virtual camera VC can be changed not only in the horizontal direction but also in the height direction. Note that it is also possible to change the position of the virtual camera VC relative to the player character PL (change the relative distance between the virtual camera VC and the player character PL) in accordance with an operation on the controller 24.

  At least a part of the objects arranged in the virtual space S is set as a sound generation source. For example, when the position of the sound generation source (object set) is located within the field of view of the virtual camera VC, sound is generated from the sound generation source. However, the present invention is not limited to this, and the region where sound is generated from the sound source may be wider or narrower than the visual field of the virtual camera VC, but the region is determined based on the sound listening position LC. It is done. Further, the sound generation source does not necessarily have to be set in association with the object. For example, a sound generation source may be set at a predetermined position coordinate in the virtual space S. The sound generated from the sound source arranged in the virtual space S is detected at a predetermined sound listening position LP in the virtual space S and output from the speaker 22 of the game apparatus 2. In the present embodiment, the sound listening position LP coincides with the position of the player character PL, but is not limited to this, and may coincide with the position of the virtual camera VC, for example.

  In the example of FIG. 3, the weapon W2 possessed by the enemy character E1 is a rifle with a silencer, and is set as a sound source with directional sound. That is, the sound source arrangement unit 42 arranges the weapon W2 that is a flying object launching unit that emits a flying object (bullet) in a predetermined direction as a sound source of a predetermined sound to be subjected to acoustic processing. The sound source arrangement means 42 changes the position of the weapon W2 according to the movement of the enemy character E1. The direction in which the enemy character E1 faces is the bullet firing direction when the weapon W2 is held. Therefore, the sound source arrangement unit 42 sets a predetermined direction (directing direction) serving as a reference for acoustic processing to a d direction that is a direction in which the enemy character E1 faces. A silencer is generally recognized as a device that has the effect of suppressing (attenuating) the firing sound of a gun or the like. However, an actual silencer does not necessarily reduce the firing sound as a whole. Since the sound leaks in the direction of the direction, i.e., the pointing direction d, the sound attenuation effect is small. In the present embodiment, acoustic processing is performed to obtain the same sound attenuation effect as that of the actual silencer.

  The angle calculation means 43 calculates an angle θ formed by a virtual line L1 extending from the weapon W2 in the direction d and a line segment L2 connecting the sound listening position LP and the sound source position BP in the virtual space S. In the example of FIG. 3, the listening position of the sound of the player character PL located at a position where θ = 0 ° is LP (0 °), and the position is at a position where θ = n (0 ° <n <90 °). The listening position of the sound of the player character PL to be played is LP (n), and the listening position of the sound of the player character PL located at a position where θ = 90 ° is expressed as LP (90 °). The corresponding line segment L2 is expressed as LP (0 °), LP (n), and LP (90 °), respectively.

  When the enemy character E1 shoots with the weapon W2, the sound processing means 45 is an acoustic for the firing sound of the bullet of the weapon W2 set as the predetermined sound according to the angle θ calculated by the angle calculation means 43. Process. More specifically, for example, the sound processing means 45 attenuates the bullet firing sound as the angle θ increases. As an aspect of attenuation, for example, the volume is reduced. As a result, the volume of the bullet firing sound increases as the angle θ approaches 0 °, and the volume of the bullet firing sound decreases as the angle θ approaches 180 °. In the example of FIG. 3, only the angle θ on the left side (right side of the paper in FIG. 3) viewed from the enemy character E1 facing the pointing direction d is illustrated, but on the right side (FIG. 3) viewed from the enemy character E1 facing the pointing direction d. The same processing is performed for the angle θ on the left side of FIG.

  FIG. 4 is a graph showing the attenuation of the sound volume with respect to the angle θ of the acoustic processing in the present embodiment. As shown in FIG. 4, when the angle θ is 0 °, that is, when the position of the player character PL is on the line of the weapon W2 possessed by the enemy character E1, the bullet sound of the weapon W2 becomes maximum, The sound volume is set to decrease as θ approaches 180 ° (the silencer effect increases). For this reason, for example, the player character PL whose sound listening position is located at LP (90 °) hardly hears the sound of the bullet fired by the weapon W2. In addition, the player character PL whose sound listening position is located at LP (n) can hear some sound, but it is difficult to clearly identify that it is a bullet firing sound. On the other hand, the player character PL whose sound listening position is located at LP (0 °) can clearly hear the bullet firing sound and recognize that the player character PL is being shot.

  Thus, the sound attenuation effect becomes higher as the angle θ formed by the sound listening position LP with respect to the direction in which the sound is emitted from the sound source with directivity (the ray of the bullet fired from the weapon W2) d increases. The smaller the θ is, the lower the sound reduction effect is, so that the sound that is the object of the acoustic processing can be given directivity. Thereby, the same effect as an actual silencer can be given to weapon W2 which is the object of acoustic processing, and more realistic game characteristics can be provided. For example, the sound of the bullet of the weapon W2 that the silencer attenuates is not attenuated in the front of the weapon W2 or the degree of attenuation is suppressed as in the present embodiment, and is attenuated as it goes to the side or rear. Thus, the player character PL is more easily noticed as the enemy character E1 is attacked by the weapon W2 as the player character PL is located in front of the player character PL.

  Moreover, the player character PL may be able to use a weapon with a silencer. In this case, when the player character PL fires a bullet in front of the enemy character, the player character PL is operated taking into consideration that the enemy character is easily noticed. Therefore, it is possible to provide a more strategic game performance as compared with the conventional mode in which the entire sound is muted.

  In FIG. 4, an example in which the sound volume decreases exponentially as the angle θ increases is illustrated, but not limited thereto, for example, an aspect in which the sound volume decreases linearly as the angle θ increases, or It is good also as an aspect which decreases in steps (step shape).

  Further, the acoustic processing as described above is not limited to a gun such as the weapon W2, and for example, a flying object launched from another flying object launching unit that launches a flying object in a predetermined direction such as a blow arrow or a bow and arrow. The same applies to sound, siren sound, voice through megaphone, earth voice, and the like.

[Modification]
An example of attenuating the sound to be subjected to acoustic processing (bullet firing sound) as the angle θ increases is not limited to a decrease in volume. For example, the sound processing unit 45 may perform sound processing by applying a low-pass filter that cuts the reference frequency (cutoff frequency) fc or higher of the sound to the sound to be subjected to sound processing. The cut-off frequency fc is determined according to the angle θ.

  FIG. 5 is a graph showing a concept when a low-pass filter is applied to a sound waveform to be subjected to acoustic processing in a modification of the present embodiment. FIG. 6 is a graph showing the change of the cutoff frequency of the low-pass filter shown in FIG. 5 with respect to the angle θ. As shown in FIG. 5, the spectral intensity of the sound is shown as the vertical axis with respect to the frequency f which is the horizontal axis. In FIG. 5, the low-pass filter LPF1 using the cutoff frequency fc (n1) when the angle θ = n1 is shown by a solid line, and the low-pass filter LPF2 using the cutoff frequency fc (n2) when the angle θ = n2. Is indicated by a broken line. The angle n2 is an angle larger than the angle n1. For this reason, as the angle θ increases, the frequency region (frequency region approximately higher than the cut-off frequency) cut by the low-pass filter in the target sound waveform increases. That is, as the angle θ increases, the frequency component of the target sound decreases. As a result, the sound to be subjected to the acoustic processing becomes a sound that becomes more muffled as the angle θ increases (that is, the high sound part is blocked and the sound is low as a whole). Furthermore, since the cutoff frequency fc approaches 0 as the angle θ approaches 180 °, the volume itself decreases.

  As described above, by performing the acoustic processing by applying the low-pass filter in which the angle θ and the cutoff frequency fc are associated, the acoustic processing that changes the sound quality according to the angle θ can be performed with a simple configuration.

  6 illustrates an example in which the cut-off frequency fc decreases linearly as the angle θ increases. However, the present invention is not limited to this. For example, as in FIG. 4, the cut-off frequency fc increases as the angle θ increases. It is good also as an aspect which decreases exponentially or an aspect which decreases in steps.

  As another example of the sound processing, the sound processing means 45 may change the degree of addition of the sound effect such as distortion (distortion) according to the angle θ. As a graph of the acoustic effect addition rate (%) with respect to the angle θ, for example, a graph in which the volume (%) on the vertical axis in FIG. 4 is replaced with the addition rate (%) is applied. In this case, as the angle θ becomes smaller, the sound to be subjected to the sound processing becomes more distorted and becomes a powerful sound. On the other hand, as the angle θ becomes larger, the sound to be subjected to the sound processing becomes a clean sound without distortion (dry sound). Becomes a sound with a small presence.

  In the present embodiment, the effect expression executing means 47 includes the reproduction of the sound effect based on the contact of the flying object when the flying object such as the bullet of the weapon W2 fired by the enemy character E1 comes into contact with the player character PL. Express effect. For example, the effect expression may be an explosion sound, a reproduction of a sound effect (hereinafter referred to as an impact-related sound) caused by landing such as a sound generated by blood splash, an effect display due to landing (display of hit mark, blood splash, etc.), or a player character that has landed Includes PL reactions (such as Nozori).

  Here, regarding the reproduction of the impact-related sound, the effect expression executing means 47 determines whether the launch point of the flying object is located on the left or right side with respect to the direction on which the player character PL is facing. The volume of the landing related sound output from the speaker on the side where the launching point of the flying object of the speaker 22 (sound output unit) is located is output larger than the volume of the landing related sound output from the other speakers. To play landing related sounds.

  For example, in the example shown in FIG. 3, when a bullet fired from the weapon W2 of the enemy character E1 hits the player character PL located at the listening position LP (0 °), the player character PL faces the bullet. Fired from the right side with reference to the direction e. Therefore, the effect expression execution unit 47 reproduces the landing related sound from the right speaker of the pair of left and right speakers 22. Alternatively, the effect expression executing unit 47 reproduces the landing related sound so that the landing related sound reproduced from the right speaker of the pair of left and right speakers 22 is larger than the landing related sound reproduced from the left speaker. To do.

  Conventionally, there has been known a mode in which only one of a pair of left and right speakers 22 is reproduced, or a large one is reproduced with respect to the other, such as sound effects generated in a game. For example, when the object explodes on the right side of the game screen, the explosion sound is reproduced from the right speaker 22. In such an embodiment, when a bullet fired from the weapon W2 of the enemy character E1 has landed on the player character PL, the speaker on the corresponding side of the pair of left and right speakers 22 according to the position of the player character PL on the game screen. If the volume of the landing related sound that is output from the speaker on the corresponding side is reproduced larger than the volume of the landing related sound that is output from the other speaker, the user is likely to feel uncomfortable.

  For this reason, conventionally, landing-related sounds are often reproduced equally from both speakers 22 as sounds generated at the center. However, in such a mode, it is not known which side was shot from the left or right side (the bullet has been blown). In order to solve such a problem, it is conceivable that the landing position on the player character PL is used as a reference in the same manner as an event that actually occurs. In this case, for example, when a bullet hits the right half of the player character PL, a landing related sound is reproduced from the right speaker. However, just landing on the right half of the player character PL does not necessarily mean that the player character PL has been shot from the right side (right side of the game screen), and the bullet shot from the left side of the player character PL is It is possible to land on the right half of the PL.

  However, when a bullet shot from the left side of the player character PL has landed on the right half of the player character PL and a landing-related sound is output from the right speaker, the user who plays the game is shot from the right side. There is a problem that often feels wrong.

  Therefore, in the present embodiment, as described above, regardless of the bullet landing position on the player character PL, in each of the pair of left and right speakers 22 according to the bullet firing position based on the direction of the player character PL. The volume of impact-related sounds is adjusted. Thereby, it is possible to make it easier for the user who plays the game to specify the firing position of the bullet from the landing related sound, and it is possible to provide more realistic game characteristics.

  In the present embodiment, the description has been made based on the sound (landing related sound) related to the landing sound of the bullet fired from the weapon W2, but other flying objects (bow and arrow, flying toward the player character PL). The same aspect as described above can be applied to the case where a sound generated when the other flying object comes into contact with the player character PL is also reproduced for a ball, a bird, an airplane, and the like. In addition, the acoustic processing is not limited to processing in which sound is attenuated as the angle θ increases, and includes processing in which sound is amplified or sound is loaded as angle θ increases.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various improvements, changes, and modifications can be made without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the example in which the acoustic processing is set so that the angle θ changes from 0 ° to 180 ° in the entire region has been described, but the present invention is not limited to this. For example, the sound processing unit 45 may not perform acoustic processing when the angle θ is from 0 ° to a predetermined angle (for example, θ = 30 °). When the angle θ is equal to or larger than a predetermined angle (for example, θ = 90 °), the sound processing unit 45 may perform a process of muting the target sound instead of performing the acoustic process.

  Moreover, in the said embodiment, the example which changes a volume, the example which changes the cut-off frequency of a low-pass filter, and the example which changes the degree of addition of an acoustic effect as three examples as a specific example of acoustic processing Although shown respectively, it is not restricted only when using these independently, You may combine several acoustic processing. When combining a plurality of acoustic processes, the respective graphs may be simply combined in parallel, or the angle range for performing the acoustic processes may be different for each of the plurality of acoustic processes. For example, when the angle θ is in the range from 0 ° to n1, only the acoustic processing for changing the degree of distortion is performed, and when the angle θ is from n1 to n2 larger than n1, in addition to the change in the degree of distortion, the cutoff frequency of the low-pass filter The angle may be changed, and the angle may be changed from the angle n2 to 180 ° in addition to the two acoustic processes.

  Moreover, when performing acoustic processing on a plurality of types of sounds, different acoustic processing may be applied for each type of sound. For example, acoustic processing for changing the cut-off frequency of the low-pass filter may be applied to the bullet firing sound from the gun, and acoustic processing for changing the degree of distortion may be applied to the siren sound.

  In the above embodiment, an example is shown in which the attenuation of the sound due to the distance between the sound source of the sound to be acoustically processed and the sound listening position LP is not considered, but the sound corresponding to the distance is not considered. The attenuation process may be combined with the acoustic process corresponding to the angle θ. In this case, the sound attenuation processing according to the distance and the acoustic processing according to the angle θ may be the same type of acoustic processing or different types of acoustic processing. For example, an acoustic process for changing the volume may be applied to the sound attenuation process according to the distance, and an acoustic process for changing the cutoff frequency of the low-pass filter may be applied to the acoustic process according to the angle θ.

  Further, although the stationary game apparatus has been described in the above embodiment, the present invention can also be suitably applied to computers such as portable game apparatuses, mobile phones, and personal computers.

  The present invention is useful for providing more realistic game characteristics.

2 game device 30a game program 30b game data 41 virtual space generation means 42 sound source arrangement means 43 angle calculation means 44 sound generation means 45 sound processing means 46 character control means 47 effect expression execution means

Claims (4)

A game system comprising: a display unit that displays an image captured by a virtual camera arranged in a virtual space as a game screen; a sound output unit that outputs sound generated from a sound source arranged in the virtual space; and a computer A game program to be executed by the computer,
The computer,
Virtual space generation means for generating a virtual space;
Sound source arrangement means for arranging a sound source of a predetermined sound in the virtual space;
An angle calculating means for calculating an angle formed by a virtual line extending from the sound source in a predetermined direction and a line segment connecting a sound listening position in the virtual space and the position of the sound source;
Function as sound generation means for generating sound generated from the sound source, and sound processing means for performing acoustic processing on the sound according to the angle ;
The sound source of the predetermined sound is set as a directional sound source,
The directional sound source is a projectile launching unit that launches a projectile in the predetermined direction,
The sound output unit includes a pair of left and right sound output units,
The game system includes an operation unit for operating a player character acting in the virtual space,
The game program causes the computer to
Character control means for controlling an action of the player character based on an operation of the operation unit by a user;
When the flying object comes into contact with the player character, the player character functions as an effect expression executing unit that performs an effect expression including reproduction of a sound effect based on the contact of the flying object,
The effect expression executing means depends on whether the launch point of the flying object is located on the left or right side with respect to the direction in which the player character faces, regardless of the contact position of the flying object on the player character. The volume of the sound effect output from the sound output unit on the side where the launching point of the flying object is located in the pair of left and right sound output units is the volume of the sound effect output from the other sound output unit. A game program for reproducing the sound effect so that the sound is output larger than the volume .   The game program according to claim 1, wherein the sound processing means attenuates the sound as the angle increases. The sound processing means performs the acoustic processing on the sound by applying a low pass filter that cuts the reference frequency or higher of the sound,
The game program according to claim 2, wherein the reference frequency is determined according to the angle. A program storage unit for storing a game program according to any one of claims 1 to 3,
A game system comprising: a computer that executes a program stored in the program storage unit.

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