Data structure for texture data, computer program product, and texture mapping method

A texture mapping method, comprising:

• calculating a coordinate, in order to access texture data comprising a computer-readable data region in which is arranged color data forming density gradients in two mutually orthogonal directions, to access said data region in one of said two directions, based on a prescribed equation using brightness information on the object surface for texture mapping;
• calculating a coordinate to access said data region in the other one of said two directions, based on an arbitrary value assigned to a dynamic variable;
• and
• performing texture mapping to said object surface, by accessing and reading said data region based on the calculated coordinates.

A texture mapping method, which maps a texture to an object, comprising:

• calculating first coordinate information in order to access a data region of said texture data in one direction of two mutually orthogonal directions defined for the texture data, from information set for said object surface;
• calculating second coordinate information in order to access a data region of said texture data in the other direction of said two mutually orthogonal directions, from information other than information set for said object surface;
• reading color data from said texture data by accessing said data region based on said first and second coordinate information;
• performing texture mapping to said object surface.

A computer program product having a computer program recorded on computer-readable recording media which causes a computer system to execute image processing, wherein said computer program causes the execution of:

• calculating a coordinate, in order to access texture data comprising a computer-readable data region in which is arranged color data forming density gradients in two mutually orthogonal directions, to access said data region in one of said two directions, based on a prescribed equation using brightness information on the object surface for texture mapping;
• calculating a coordinate to access said data region in the other one of said two directions, based on an arbitrary value assigned to a dynamic variable;
• and
• performing texture mapping to said object surface, by accessing and reading said data region based on the calculated coordinates.

A computer program product having a computer program recorded on computer-readable recording media which causes a computer system to execute image processing, wherein said computer program causes the execution of:

• calculating a coordinate, in order to access a computer-readable data region in which color data is formed with the brightness changing in one direction of two mutually orthogonal directions defined in texture data used to perform texture mapping to an object, and with at least either color information or translucence changing in the other direction, to access said data region in one direction of said two directions based on a prescribed equation using brightness information for the object surface to which texture mapping is to be performed;
• calculating a coordinate in order to access said data region in the other direction of said two directions, based on an arbitrary value assigned to a dynamic variable;
• and
• performing a texture mapping to said object surface, by accessing said data region based on the calculated coordinates.

A computer program product having a computer program recorded on computer-readable recording media which causes a computer system to execute image processing, wherein said computer program causes the execution of:

• calculating coordinate, in order to access texture data comprising a computer-readable data region in which brightness data is arranged such that a brightness gradient is formed with the number of gray scales changing in numerous stages along one direction of two mutually orthogonal directions and the number of said gray scales increases and decreases along the other direction of said two directions, to access said data region in one of said directions based on a prescribed equation using brightness information for the object surface;
• calculating a coordinate in order to access said data region in said other direction, based on an arbitrary value assigned to a dynamic variable;
• and
• performing a texture mapping to said object surface by accessing said data region based on the calculated coordinates, and reading brightness data.

A texture mapping device, comprising:

• means which, in order to access texture data comprising a computer-readable data region in which is arranged color data forming density gradients in two mutually orthogonal directions, calculates a coordinate to access said data region in one direction of said two directions, based on a prescribed equation using brightness information on the object surface for texture mapping;
• means for calculating a coordinate to access said data region in the other one of said two directions, based on an arbitrary value assigned to a dynamic variable;
• and
• means for accessing said data region based on the calculated coordinates to read color data, and to perform texture mapping to said object surface.

A texture mapping device for mapping a texture to an object, comprising:

• means for calculating first coordinate information in order to access a data region of texture data in one direction of two mutually orthogonal directions defined for said texture data from information set on the surface of said object;
• means for calculating second coordinate information in order to access a data region of said texture data in the other direction of said two directions from information other than information set on the surface of said object;
• and
• means for accessing said data region based on said first and second coordinate information to read color data from said texture data and to perform texture mapping to said object surface.