JP2012063820A - Image processor, image processor control method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To express a stereoscopic effect of hair while suppressing a processing load.SOLUTION: A game device (10) displays, on display means (32), an image of a three-dimensional space viewed from a given viewpoint in which a character object indicating a character is placed. An object setting unit (72) sets an character object (44) including a substantially cylindrical object (60) for drawing hair indicating the hair of the character. When a hair texture image (90) is mapped on the object (60) for drawing hair, a texture image acquisition unit (74) acquires the hair texture image (90) in which the hair appears spirally along a surface of the object (60) for drawing hair. A display control unit (76) causes the display means (32) to display an image of the character object (44), viewed from a viewpoint (46), including the object (60) for drawing hair on which the hair texture image (90) is mapped.

Description

  The present invention relates to an image processing apparatus, a control method for the image processing apparatus, and a program.

  Conventionally, an image processing apparatus that displays an image of a virtual three-dimensional space viewed from a given viewpoint is known. Patent Document 1 describes a technique for displaying an image obtained by viewing a character object to which a texture image is mapped from a virtual camera.

JP 2009-230543 A

  For example, when representing the hair of a character, the method of simply mapping a texture image to a character object as in Patent Document 1 results in a planar depiction, so the solid of hair (for example, permed hair) The feeling cannot be expressed sufficiently. In order to express the three-dimensional effect of hair, it may be possible to finely set polygons included in the character object. However, since the number of polygon vertices increases, the processing load may increase.

  The present invention has been made in view of the above problems, and an object thereof is to provide an image processing apparatus, a control method for an image processing apparatus, and a program capable of expressing the three-dimensional effect of hair while suppressing a processing load. It is to provide.

  In order to solve the above problems, an image processing apparatus according to the present invention is an image processing apparatus that displays an image obtained by viewing a three-dimensional space in which a character object representing a character is arranged from a given viewpoint on a display unit. Object setting means for setting the character object including a substantially cylindrical hair drawing object representing the character's hair, and a hair texture image representing the character's hair, wherein the hair texture image is the Texture image acquisition means for acquiring the hair texture image in which the hair appears spirally along the surface of the hair drawing object when mapped to the hair drawing object, and the hair texture image mapped The character object including a hair drawing object Characterized by comprising display control means for displaying an image viewed from the point on said display means.

  A control method for an image processing apparatus according to the present invention is a control method for an image processing apparatus that displays an image obtained by viewing a three-dimensional space in which a character object representing a character is viewed from a given viewpoint on a display means. An object setting step for setting the character object including a substantially cylindrical hair drawing object representing the character's hair, and a hair texture image representing the character's hair, wherein the hair texture image is the A texture image acquisition step of acquiring the hair texture image in which the hair appears spirally along the surface of the hair drawing object when mapped to the hair drawing object; and the hair texture image mapped The character object including a hair drawing object The characterized in that it comprises a display control step of displaying on the display means an image viewed from the viewpoint.

  The program according to the present invention is a program for causing a computer to function as an image processing apparatus that displays on a display means an image obtained by viewing a three-dimensional space in which character objects representing characters are arranged from a given viewpoint. Object setting means for setting the character object including a substantially cylindrical hair drawing object representing the character's hair, and a hair texture image representing the character's hair, wherein the hair texture image is the hair Texture image acquisition means for acquiring the hair texture image in which the hair appears spirally along the surface of the hair drawing object when mapped to the drawing object, and the hair drawing on which the hair texture image is mapped The character that contains the object for And characterized in that the computer function the image viewed object from the viewpoint display control means for displaying on the display means, an image processing apparatus including a.

  An information storage medium according to the present invention is a computer-readable information storage medium in which the program is stored.

  According to the present invention, it is possible to express the three-dimensional effect of hair while suppressing the processing load.

  In the aspect of the invention, the texture image acquisition unit may display a first hair portion extending from the first position to the second position of the hair texture image, and from the third position of the hair texture image. The hair texture image in which the second hair portion extending to the fourth position appears is obtained, and the display control means includes the second position and the third position on the surface of the hair drawing object. The display means displays an image obtained by viewing the character object including the hair drawing object to which the texture image is mapped so that the texture images are substantially coincident with each other from the viewpoint.

  In the aspect of the invention, the texture image acquisition unit may be configured such that the second position and the third position are symmetrical with respect to a horizontal or vertical center line of the hair texture image. The hair texture image is acquired.

  In the aspect of the invention, the texture image acquisition unit may include the second position in an end region corresponding to one end of the hair texture image, and the third position in the other position. The hair texture image included in the end region corresponding to the end of the hair is obtained.

It is a figure which shows the hardware constitutions of the game device which concerns on embodiment of this invention. It is a figure which shows an example of game space. It is a figure which shows the object showing the head of a character among character objects. It is a figure which shows the object for hair drawing. It is a figure which shows the object for hair drawing set around the scalp object. It is a figure which shows an example of a game screen. It is a functional block diagram which shows the function relevant to this invention among the functions implement | achieved with a game device. It is a figure which shows an example of a face texture image. It is a figure which shows an example of a hair texture image. It is a figure which shows the object for hair drawing to which the hair texture image was mapped. It is a flowchart which shows the process which a game device performs every predetermined time. It is a figure which shows the hair texture image in a modification (1-1). It is a figure showing a mode that the hair texture image in a modification (1-2) is mapped. It is a figure showing a mode that the hair texture image in a modification (1-3) is mapped. It is a figure showing a mode that the hair texture image in a modification (1-4) is mapped. It is a figure which shows a mode that the hair texture image in a modification (2) is mapped.

[1. Embodiment]
An example of an embodiment will be described in detail with reference to the drawings. The image processing apparatus according to the embodiment of the present invention is realized by, for example, a consumer game machine (stationary game machine), a portable game machine, a mobile phone, a personal digital assistant (PDA), a personal computer, or the like. In the present embodiment, the case where the image processing apparatus according to the present invention is applied to a consumer game machine will be described.

[2. Hardware configuration of game device]
FIG. 1 is a diagram illustrating a hardware configuration of a game device according to an embodiment of the present invention. A game apparatus 10 shown in FIG. 1 includes a consumer game machine 11, a display unit 32, an audio output unit 34, and an optical disc 36 (information storage medium).

  The display unit 32 and the audio output unit 34 are connected to the consumer game machine 11. The display unit 32 is, for example, a home television receiver or a liquid crystal display. The audio output unit 34 is, for example, a speaker or headphones incorporated in a home television receiver.

  The home game machine 11 is a known computer game system. The home game machine 11 includes a bus 12, a control unit 14, a main memory 16, an image processing unit 18, an input / output processing unit 20, an audio processing unit 22, an optical disk playback unit 24, a hard disk 26, a communication interface 28, and a controller 30. Including.

  The control unit 14 includes one or a plurality of CPUs. The control unit 14 executes processing and information processing for controlling each unit of the consumer game machine 11 based on an operating system stored in a ROM (not shown) and a program read from the optical disc 36.

  The main memory 16 includes a RAM, for example. The program and data read from the optical disc 36 are written in the main memory 16. The main memory 16 is also used as a working memory for the control unit 14. The bus 12 is for exchanging addresses and data among the units of the consumer game machine 11.

  The image processing unit 18 includes a VRAM. The image processing unit 18 draws a game screen on the VRAM based on the image data supplied from the control unit 14. The game screen drawn on the VRAM is converted into a video signal and output to the display unit 32 at a predetermined timing.

  The input / output processing unit 20 is an interface for the control unit 14 to access the audio processing unit 22, the optical disc playback unit 24, the hard disk 26, the communication interface 28, and the controller 30.

  The audio processing unit 22 includes a sound buffer. The sound processing unit 22 outputs the sound data read from the optical disc 36 to the sound buffer from the sound output unit 34.

  The communication interface 28 is an interface for connecting the consumer game machine 11 to a communication network such as the Internet by wire or wireless.

  The optical disc playback unit 24 reads programs and data recorded on the optical disc 36. In the present embodiment, the case where the optical disc 36 is used to supply programs and data to the consumer game machine 11 will be described. However, other information storage media such as a memory card are used to store programs and data. You may make it supply with respect to the consumer game machine 11. FIG. In addition, for example, a program or data may be supplied to the consumer game machine 11 from a remote place via a communication network.

  The hard disk 26 is a general hard disk device (auxiliary storage device). Note that programs and data described as being stored in the optical disk 36 in the present embodiment may be stored in the hard disk 26.

  The controller 30 is an operation unit for a user to perform an operation. One or more controllers 30 are wired or wirelessly connected to the home game machine 11. The input / output processing unit 20 scans the state of each operation member of the controller 30 at regular intervals (for example, every 1/60 seconds). An operation signal representing the scan result is supplied to the control unit 14 via the bus 12. The control unit 14 determines a user operation based on the operation signal.

[3. Game executed on game device]
The game apparatus 10 executes a game program read from the optical disc 36 to display, for example, an image obtained by viewing a three-dimensional space in which a character object representing a character is arranged from a given viewpoint (for example, the display unit 32). ).

  Below, the case where the game (for example, soccer game) in which the character object showing a character moves in the game space (three-dimensional space) is performed is demonstrated. When the game is started, for example, a game space is constructed in the main memory 16.

  FIG. 2 is a diagram illustrating an example of the game space. A game space 40 shown in FIG. 2 is a virtual three-dimensional space in which three coordinate axes (Xw axis, Yw axis, and Zw axis) orthogonal to each other are set.

  As shown in FIG. 2, a field object 42 representing the ground is arranged in the game space 40. A character object 44 representing a character is arranged on the field object 42. In FIG. 2, the shape of each object is shown in a simplified manner.

  An object arranged in the game space 40 includes a plurality of polygons. That is, the three-dimensional shape of each object is represented by a plurality of polygons. The positions (vertex coordinates) of the polygons included in each object are specified by, for example, three-dimensional coordinates in the world coordinate system (Xw-Yw-Zw coordinate system).

  In the present embodiment, the character object 44 includes an object representing each part of the character (eg, head, torso, etc.) and a substantially cylindrical shape (eg, cylindrical shape, polygonal column shape, etc.) set around the object. A frustoconical object).

  FIG. 3 is a diagram showing an object representing the character's head among the character objects 44. Here, the head of the character indicates a portion above the character's neck. As shown in FIG. 3, in the character object 44, the unevenness of the part of the head of the character is expressed by a plurality of polygons. For example, the character object 44 includes an eye object 52, a nose object 54, a mouth object 56, and a scalp object 58.

  FIG. 4 is a diagram illustrating a hair drawing object. As shown in FIG. 4, the hair drawing object 60 is substantially cylindrical. Although details will be described later, the character's hair is drawn so as to wrap around the substantially cylindrical hair drawing object 60. For example, a hair drawing object 60 is set around the scalp object 58. In other words, the hair drawing object 60 is set at a position adjacent to the surface of the scalp object 58.

  In the present embodiment, “the object is set” is the same meaning that the object is arranged in the game space 40. That is, when “object is set”, information indicating each point of the object (for example, the vertex coordinates of the polygon) is stored in the main memory 16.

  FIG. 5 is a diagram showing a hair drawing object 60 set around the scalp object 58. As shown in FIG. 5, a plurality of hair drawing objects 60 are set around the scalp object 58. That is, the hair drawing object 60 is set at a position where the permed hair is to be represented.

  Further, the character object 44 set as shown in FIG. 5 is mapped with a texture image representing the character's face and hair, thereby drawing the character's face and hair. Various known methods can be applied to the method of mapping the texture image to the object.

  In the present embodiment, the hair drawing object 60 itself is transparent. For example, the hair drawing object 60 is a so-called transparent object including a translucent polygon. That is, in the image displayed on the display unit 32, the hair drawing object 60 itself is not displayed, but the hair drawn on the surface of the hair drawing object 60 is displayed.

  Returning to FIG. 2, a virtual camera 46 (viewpoint) is set in the game space 40. On the display unit 32, an image (game screen) representing a state in which the game space 40 is viewed from the virtual camera 46 is displayed. This game screen is generated by converting the vertex coordinates (polygon vertex coordinates) of each object arranged in the game space 40 from the world coordinate system to the screen coordinate system using a predetermined coordinate conversion operation. .

  FIG. 6 is a diagram illustrating an example of the game screen. For example, the character represented by the character object 44 in the field of view of the virtual camera 46 is displayed on the game screen G. In the present embodiment, as shown in FIG. 6, a character having hair with three-dimensional perm is displayed on the game screen G.

  In the present embodiment, in order to express the three-dimensional effect of the permed hair while suppressing the processing load of the game apparatus 10, it is spirally formed along the surface of the hair drawing object 60 set as shown in FIG. The texture image is mapped so that the hair appears. Hereinafter, this technique will be described in detail.

[4. Functions realized in game device]
FIG. 7 is a functional block diagram showing functions related to the present invention among the functions realized by the game apparatus 10. As shown in FIG. 7, the game apparatus 10 includes a game data storage unit 70, an object setting unit 72, a texture image acquisition unit 74, and a display control unit 76.

[4-1. Game data storage unit]
The game data storage unit 70 is realized mainly by the main memory 16 and the optical disc 36, for example. The game data storage unit 70 stores, for example, data necessary for realizing a game and displaying a game screen. The control unit 14 functions as a means for acquiring various data stored in the game data storage unit 70.

The game data storage unit 70 stores the following data, for example.
(1) Game situation data indicating the current situation of the game being executed (2) Image data of a texture image mapped to an object arranged in the game space 40

[Game status data]
In the game situation data, for example, data indicating the current situation of the game space 40 is stored. For example, the game situation data includes data indicating the current state of the character object 44 (representative points, vertex coordinates of the polygon, character posture, movement direction, etc.), and the current state of the virtual camera 46 (position, line-of-sight direction, etc.). And the like are included.

  The game situation data is updated at predetermined time intervals based on the game program. For example, the position and posture of the character object 44 are updated based on the moving direction of the character object 44. The display on the game screen is also updated based on the updated game situation data.

[image data]
The image data includes, for example, texture image data mapped to the character object 44. Each part of these texture images is associated with the position of the object to be mapped (polygon vertex coordinates). It is assumed that data indicating this association is stored in the game data storage unit 70. In the present embodiment, a case will be described in which a face texture image representing a character's face and a hair texture image representing permed hair are stored as image data.

  FIG. 8 is a diagram illustrating an example of a face texture image. In the face texture image 80 shown in FIG. 8, for example, eyes 82, a nose 84, a mouth 86, and the like are drawn. Although omitted in FIG. 8, the facial texture image 80 also depicts the hair of the character (for example, a portion where the perm is not three-dimensionally applied), ears, skin texture, and the like.

  For example, the eye 82, the nose 84, and the mouth 86 are associated with the eye object 52, the nose object 54, and the mouth object 56, respectively. Similarly, other parts appearing in the face texture image 80 are associated with each point of the object representing the head of the character among the character objects 44.

  FIG. 9 is a diagram illustrating an example of a hair texture image. As shown in FIG. 9, in the hair texture image 90, the hair of the permed character (shown by shading in FIG. 9) is drawn. The hair texture image 90 is mapped to the hair drawing object 60. That is, each point of the hair texture image 90 and each point of the hair drawing object 60 are associated with each other.

  The hair texture image 90 is configured so that hair appears spirally along the surface of the hair drawing object 60 when the hair texture image 90 is mapped to the hair drawing object 60.

  “Hair appears spirally along the surface of the hair drawing object 60” means that the hair of the character appears to be wound (turned) around the surface of the hair drawing object 60. That is, the hair of the character appears on the surface of the object 60 so as to be wound in a coil shape. Therefore, the hair with the so-called spiral perm is expressed as if it is wound around the rod.

  In the present embodiment, in the hair texture image 90, the first hair portion 94a extending from the first position 92a to the second position 92b of the hair texture image 90 appears. Moreover, in the hair texture image 90, the 2nd hair part 94b extended from the 3rd position 92c of the hair texture image 90 to the 4th position 92d appears.

  The first position 92a to the fourth position 92d are the positions of the pixels constituting the hair texture image 90. “Extending from the first position 92a to the second position 92b” means that when the first hair portion 94a appearing in the hair texture image 90 is traced from the first position 92a (when pixels representing hair are connected), 2 position 92b. The first hair portion 94a may extend linearly from the first position 92a to the second position 92b, and the first hair portion 94a is curved from the first position 92a to the second position 92b. You may stretch as you do. “Extending from the third position 92c of the hair texture image 90 to the fourth position 92d” has the same meaning.

  In the hair texture image 90, regions (pixels) other than the first hair portion 94a and the second hair portion 94b are transparent. As a method for setting a transparent color to a pixel, various methods such as a method using a semi-transparent texture in which alpha information indicating semi-transparency is stored in association with each pixel of an image can be applied.

  In the present embodiment, the second position 92b and the third position 92c of the hair texture image 90 are line symmetric with respect to the horizontal or vertical center line of the hair texture image 90.

  “The vertical direction or the horizontal direction of the hair texture image 90” has the same meaning as “the vertical direction and the horizontal direction of the hair texture image 90”, respectively. In the example of FIG. 9, among the two-dimensional coordinates (U-V coordinates) set to specify the position of each pixel of the hair texture image 90, the positive direction of the U axis is the horizontal direction, and the positive direction of the V axis is The direction is vertical. In FIG. 9, the upper left point of the hair texture image 90 is the origin.

In the case shown in FIG. 9, the second position 92b and the third position 92c are line-symmetric with respect to the center line in the vertical direction of the hair texture image 90 (a line where the U coordinate is U _1/2 ). Yes.

  Furthermore, in the present embodiment, the second position 92b of the hair texture image 90 is included in the end region 96b corresponding to one end of the hair texture image 90, and the third position 92c is the other end. A case where the portion is included in the end region 96c corresponding to the portion will be described.

  The end region is a predetermined region including at least the end of the image in the region of the hair texture image 90. For example, in the example illustrated in FIG. 9, the end region of the hair texture image 90 includes four end regions 96 a to 96 d corresponding to both ends in the horizontal direction and the vertical direction.

For example, the end region 96a is a predetermined region including one end portion in the vertical direction (pixel having the smallest V coordinate) (for example, a region where the V coordinate satisfies 0 ≦ V ≦ α (α is an arbitrary positive integer). ). Further, the end regions 96d, the other end of the vertical (V coordinate is the largest V ₁ that the pixel) predetermined area (e.g., area of the V coordinate is _{V 1 -α ≦ V ≦ V 1} ) That is.

Further, for example, the end region 96b is a predetermined region (for example, a region where the U coordinate satisfies U ₁ −α ≦ U ≦ U ₁ ) including one horizontal end (pixel having the largest U coordinate). It is. The end region 96d is a predetermined region (for example, a region where the U coordinate satisfies 0 ≦ U ≦ α) including the other end portion in the horizontal direction (the pixel having the smallest U coordinate).

  In the present embodiment, the hair texture image 90 represents the hair of the character obliquely with respect to the horizontal direction or the vertical direction of the hair texture image 90. “The hair of the character appears diagonally with respect to the horizontal or vertical direction” means that the horizontal or vertical direction of the hair texture image 90 is connected to the pixel representing the hair of the character among the pixels of the hair texture image 90. The angle (θ) formed by the direction satisfies, for example, a relationship of 0 ° <θ <90 ° (for example, θ = 30 °). By drawing the character's hair in this way, it is possible to easily express the state in which the character's hair is permed.

[4-2. Object setting section]
The object setting unit 72 is realized mainly by the control unit 14. The object setting unit 72 sets the character object 44 including the substantially cylindrical hair drawing object 60 representing the character's hair. For example, the object setting unit 72 sets the hair drawing object 60 around an object representing one of the character parts of the character object 44.

  The object setting unit 72 sets the hair drawing object 60 based on the position of the character object 44 (for example, the representative point of the character object 44) stored in the game situation data. Information indicating the position of the hair drawing object 60 (polygon vertex coordinates) is stored in the game situation data.

  Note that the object setting unit 72 may change the position, moving direction, and moving speed of the hair drawing object 60 based on the position change of the object representing the head of the character object 44. That is, the permed hair may be expressed so as to sway according to the movement of the character's head.

[4-3. Texture image acquisition unit]
The texture image acquisition unit 74 is realized mainly by the control unit 14. The texture image acquisition unit 74 acquires a texture image to be mapped to the character object 44 by referring to the game data storage unit 70. For example, the texture image acquisition unit 74 acquires a hair texture image 90 in which the hair of the character is represented.

[4-4. Display control unit]
The display control unit 76 is realized mainly by the control unit 14. The display control unit 76 displays an image (for example, a game screen) obtained by viewing the character object 44 including the hair drawing object 60 to which the hair texture image 90 is mapped from the viewpoint (for example, the virtual camera 46). Part 32).

  In the present embodiment, for example, the hair texture image 90 is mapped so that the second position 92b and the third position 92c substantially coincide. In other words, the position of the hair drawing object 60 to which the first hair part 94a at the second position 92b is mapped and the hair drawing to which the second hair part 94b at the third position 92c is mapped. The position of the object 60 for use substantially coincides.

  For example, the position of the hair drawing object 60 associated with the second position 92b is substantially equal to the position of the hair drawing object 60 associated with the third position 92c. The position and the position of the hair drawing object 60 are associated with each other and stored in the game data storage unit 70.

  FIG. 10 is a diagram illustrating the hair drawing object 60 to which the hair texture image 90 is mapped. The positions 62a, 62b, 62c, and 62d on the surface of the hair drawing object 60 shown in FIG. 10 are the first position 92a, the second position 92b, the third position 92c, and the fourth position of the hair texture image 90, respectively. Corresponds to 92d.

  As shown in FIG. 10, the position 62b and the position 62c substantially coincide. That is, the first hair portion 94a at the second position 92b and the second hair portion 94b at the third position 92c are connected to each other on the surface of the hair drawing object 60. By doing so, as shown in FIG. 10, the hair of the character appears spirally along the surface of the substantially cylindrical hair drawing object 60. That is, it is possible to three-dimensionally express the state in which the permed hair is spiral.

[5. Processing executed in game device]
Next, processing executed by the game apparatus 10 will be described. FIG. 11 is a flowchart showing processing executed by the game apparatus 10 every predetermined time (for example, 1/60 seconds). The control unit 14 executes the process shown in FIG. 11 according to the program stored on the optical disc 36.

  First, the control unit 14 sets the hair drawing object 60 in the game space 40 (S101). In S101, for example, game situation data is referred to, and a plurality of hair drawing objects 60 are set around each part of the character. The positions and number of the hair drawing objects 60 may be predetermined for each character. For example, in the case of a long hair character, the hair drawing object 60 is set around the waist, and in the case of a short hair character, the hair drawing object 60 is set around the face.

  The control unit 14 refers to the hair texture image 90 (S102). The control unit 14 maps the hair texture image 90 onto the hair drawing object 60 set in S101 (S103). In S103, for example, a hair texture image 90 as shown in FIG. 9 is mapped so as to wrap the substantially cylindrical hair drawing object 60. That is, the hair of the character appears spirally along the surface of the hair drawing object 60.

  One hair texture image 90 may be mapped to a plurality of hair drawing objects 60, or a hair texture image 90 may be prepared for each character or for each hair drawing object 60.

  The control unit 14 generates an image when the character object 44 including the hair drawing object 60 to which the hair texture image 90 is mapped is viewed from the virtual camera 46 (S104). That is, as shown in FIG. 6, a game screen on which a perm stereoscopic effect is expressed is displayed on the display unit 32.

  According to the game apparatus 10 described above, since the hair of the character appears spirally along the surface of the hair drawing object 60, it is possible to express the three-dimensional effect of the hair on which the permanent is applied. Compared to expressing the perceived three-dimensional hair with a complex polygon shape, the perm three-dimensional can be expressed with a small number of polygons, reducing the processing load and reducing the three-dimensional effect of the hair. Can be expressed.

  Furthermore, when the hair texture image 90 is mapped, the positions of the second position 92b and the third position 92c of the hair texture image 90 substantially coincide with each other, so that the first hair portion 94a and the second hair portion 94b can be connected. That is, the hair can be drawn in a spiral manner on the surface of the hair drawing object 60.

  Furthermore, the second position 92b and the third position 92c are symmetrical with respect to the center line, and the second position 92b and the third position 92c are included in the end region, thereby making it easy to set the mapping position. Can be. That is, in the case of the hair texture image 90 as shown in FIG. 9, the hair is spirally wound by being wrapped around the substantially cylindrical hair drawing object 60 and mapping so that both ends of the hair texture image 90 are matched. Can be drawn.

  In the above-described embodiment, the case where the character's hair appears in the horizontal direction of the hair texture image 90 has been described. However, when the character's hair appears in the vertical direction of the hair texture image 90, the same processing is performed. Hair can be represented spirally on the surface of the object 60. In other words, the second position 92b and the third position 92c included in the end regions 96a and 96d in the vertical direction may be mapped so as to substantially match on the surface of the hair drawing object 60. .

  The present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.

(1) For example, the hair texture image 90 as shown in FIG. 9 has been described as an example. That's fine. That is, mapping to the hair drawing object 60 is not limited to the hair texture image 90 as in the embodiment.

(1-1) For example, FIG. 9 illustrates the case where two hair parts, the first hair part 94a and the second hair part 94b, appear in the hair texture image 90, but the hair of the character is shown in FIG. It is not limited to the example. For example, three or more hair portions may appear.

  FIG. 12 is a diagram showing a hair texture image 90 in the modified example (1-1). For example, as shown in FIG. 12, in addition to the first hair portion 94a and the second hair portion 94b, a third hair portion 94c may appear in the hair texture image 90. By mapping such a hair texture image 90 to the hair drawing object 60, it is possible to three-dimensionally express how the permed hair is intertwined in a complex manner.

(1-2) Further, for example, the second position 92b and the third position 92c of the hair texture image 90 do not necessarily have to be line symmetric with respect to the center line in the horizontal direction or the vertical direction.

  FIG. 13 is a diagram illustrating a state in which the hair texture image 90 in the modified example (1-2) is mapped. As shown in FIG. 13, even if the second position 92b and the third position 92c are not line-symmetrical, the second position 92b and the third position on the surface of the hair drawing object 60. The hair texture image 90 may be mapped to the hair drawing object 60 so that 92c substantially matches (that is, the position 62b and the position 62c substantially match).

  That is, even when the hair texture image 90 as shown in FIG. 13 is used, if the position 62b associated with the second position 92b and the position 62c associated with the third position 92c substantially match. Good. In other words, the hair texture image 90 may be mapped so as to wrap the hair drawing object 60 by rotating the hair texture image 90 shown in FIG. 13 clockwise by a predetermined angle.

(1-3) For example, the hair does not necessarily appear obliquely with respect to the horizontal direction or the vertical direction of the hair texture image 90. The hair may appear in the horizontal direction or the vertical direction of the hair texture image 90.

  FIG. 14 is a diagram illustrating a manner in which the hair texture image 90 in the modified example (1-3) is mapped. As shown in FIG. 13, the direction connecting the first position 92a and the second position 92b (that is, the direction of the first hair portion 94a), and the third position 92c and the fourth position 92d. The tying direction (that is, the direction of the second hair portion 94b) may be the horizontal direction. In this case as well, similarly to the modified example (1-2), the second position 92b and the third position 92c may be mapped on the surface of the hair drawing object 60 so as to substantially coincide with each other. .

(1-4) For example, the second position 92b and the third position 92c of the hair texture image 90 do not necessarily have to be included in the end regions 96a, 96b, 96c, and 96d. The first position 92, the second position 92b, the third position 92c, and the fourth position 92d of the hair texture image 90 may be arbitrary positions in the hair texture image 90, respectively.

  FIG. 15 is a diagram illustrating a manner in which the hair texture image 90 in the modified example (1-4) is mapped. As shown in FIG. 14, when the hair texture image 90 is mapped to the hair drawing object 60 even if the second position 92b and the third position 92c are not included in the end region, the hair On the surface of the drawing object 60, the second position 92b and the third position 92c may be substantially matched. For example, in the modified example (1-4), the region E (shown by a one-dot chain line in FIG. 15) in the hair texture image 90 may be mapped to the hair drawing object 60.

(2) For example, hair may be drawn spirally on the surface of the hair drawing object 60 by multiple mapping of a plurality of hair texture images on the hair drawing object 60.

FIG. 16 is a diagram illustrating how the hair texture image 90 is mapped in the modification example (2). As shown in FIG. 16, the hair texture image 90 shows that the character's hair straddles three regions 90a, 90b, and 90c. Each of the regions 90a, 90b, and 90c may be the same area as the hair texture image 90 shown in FIG. 9 (an area of U ₁ * V ₁ ).

  For example, when the region 90a of the hair texture image 90 is first mapped to the hair drawing object 60, the hair from the position P1 to the position P2 appears on the surface of the hair drawing object 60 (the hair drawing object shown in FIG. 16). 60a state). Next, when the region 90b in the hair texture image 90 is mapped to the hair drawing object 60, the hair from the position P2 to the position P3 appears on the surface of the hair drawing object 60 (the hair drawing object 60b shown in FIG. 16). Status). Finally, when the region 90c of the hair texture image 90 is mapped to the hair drawing object 60, the hair from the position P3 to the position P4 appears on the surface of the hair drawing object 60 (the hair drawing object 60c shown in FIG. 16). State).

  In the modification (2), the hair texture image 90 is divided into a plurality of regions, and each region is multiplexed and mapped to the hair drawing object 60. Further, on the surface of the hair drawing object 60, a plurality of regions of the hair texture image 90 are arranged so that the positions of the hairs included in the boundaries (positions P2 and P3 in FIG. 16) of the regions of the hair texture image 90 substantially coincide with each other. Are multiplexed and mapped to the hair drawing object 60.

  By doing as described above, hair can be drawn spirally on the surface of the hair drawing object 60. In other words, the hair texture image 90 shown in FIG. 16 is mapped to the hair drawing object 60 so as to be wrapped three times.

(3) For example, in the embodiment, the case where the hair drawing object 60 having a shape as shown in FIG. 4 is set has been described, but the hair drawing object 60 may have another shape. The hair drawing object 60 may have a substantially cylindrical shape so that the hair of the character appears spirally on the surface when the hair texture image 90 is mapped.

(4) Further, the object setting unit 72 changes the number of hair drawing objects 60 and / or the fineness of the polygons based on the number of character objects 44 arranged in the field of view of the virtual camera 46. Also good. If there are densely populated characters in the field of view of the virtual camera 46, the number of hair drawing objects 60 to be set increases, so that the processing load on the game apparatus 10 is suppressed as described above. It may be. That is, the object setting unit 72 sets the number of hair drawing objects 60 and / or the polygons to become rough as the number of character objects 44 arranged in the field of view of the virtual camera 46 increases. May be.

  Similarly, the object setting unit 72 may change the number of hair drawing objects 60 and / or the fineness of polygons based on the distance between the position of the character object 44 and the position of the virtual camera 46. That is, when the distance between the character object 44 and the virtual camera 46 is long, there is not much change in appearance even if the hair is depicted relatively roughly. That is, the object setting unit 72 may set the number of hair drawing objects 60 to be smaller and / or the polygon to be rougher as the distance between the position of the character object 44 and the position of the virtual camera 46 is longer. Good.

(5) Moreover, in the said embodiment and modification, the hair of the character imitating a human was mentioned as an example, but you may apply this invention to characters other than a human. For example, the present invention may be applied to a character imitating a monster whose whole body is covered with hair.

(6) Further, for example, the image processing apparatus according to the present invention may display an image obtained by viewing the three-dimensional space in which the character object is arranged from a given viewpoint. The present invention can be applied.

  DESCRIPTION OF SYMBOLS 10 Game device, 11 Home-use game machine, 12 bus | bath, 14 Control part, 16 Main memory, 18 Image processing part, 20 Input / output processing part, 22 Sound processing part, 24 Optical disk reproducing part, 26 Hard disk, 28 Communication interface, 30 Controller, 32 Display unit, 34 Audio output unit, 36 Optical disc, 40 Game space, 42 Field object, 44 Character object, 46 Virtual camera, 52 Eye object, 54 Nose object, 56 Mouth object, 58 Scalp object, 60 For hair drawing Object, 70 game data storage unit, 72 object setting unit, 74 texture image acquisition unit, 76 display control unit, 80 face texture image, 90 hair texture image.

Claims (6)

An image processing apparatus that displays an image of a three-dimensional space in which a character object representing a character is viewed from a given viewpoint on a display means,
Object setting means for setting the character object including a substantially cylindrical hair drawing object representing the character's hair;
A hair texture image representing the character's hair, and when the hair texture image is mapped to the hair drawing object, the hair appears spirally along the surface of the hair drawing object. Texture image acquisition means for acquiring the hair texture image;
Display control means for causing the display means to display an image of the character object including the hair drawing object to which the hair texture image is mapped as viewed from the viewpoint;
An image processing apparatus comprising: The texture image acquisition means displays a first hair portion extending from a first position to a second position of the hair texture image, and a second position extending from a third position to a fourth position of the hair texture image. Obtaining the hair texture image in which the hair portion appears,
The display control means includes the character object including the hair drawing object to which the texture image is mapped so that the second position and the third position substantially coincide with each other on the surface of the hair drawing object. Displaying the image viewed from the viewpoint on the display means,
The image processing apparatus according to claim 1.   The texture image acquisition means acquires the hair texture image in which the second position and the third position are axisymmetric with respect to a horizontal or vertical center line of the hair texture image. The image processing apparatus according to claim 2.   The texture image acquisition means includes an end region in which the second position is included in an end region corresponding to one end of the hair texture image, and the third position corresponds to another end. The image processing apparatus according to claim 2, wherein the hair texture image included in the image is acquired. A control method of an image processing apparatus for displaying an image of a three-dimensional space in which a character object representing a character is viewed from a given viewpoint on a display means,
An object setting step for setting the character object including a substantially cylindrical hair drawing object representing the character's hair;
A hair texture image representing the character's hair, and when the hair texture image is mapped to the hair drawing object, the hair appears spirally along the surface of the hair drawing object. A texture image obtaining step for obtaining the hair texture image;
A display control step of causing the display means to display an image of the character object including the hair drawing object to which the hair texture image is mapped as viewed from the viewpoint;
A control method for an image processing apparatus. A program for causing a computer to function as an image processing apparatus that displays on a display means an image of a three-dimensional space in which a character object representing a character is viewed from a given viewpoint,
Object setting means for setting the character object including a substantially cylindrical hair drawing object representing the character's hair;
A hair texture image representing the character's hair, and when the hair texture image is mapped to the hair drawing object, the hair appears spirally along the surface of the hair drawing object. Texture image acquisition means for acquiring the hair texture image;
Display control means for causing the display means to display an image of the character object including the hair drawing object to which the hair texture image is mapped as viewed from the viewpoint;
A program for causing the computer to function as an image processing apparatus including:

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