Patent ID: 6850242

Claim:
An image generating system comprising: a memory which stores a program and data for image generating; and at least one processor which is coupled with the memory and performs processing for image generating, the memory including a texture storage section which stores a texture of an environment to be viewed in an upward direction from an object, and the processor including a texture mapping section which reads the environment texture out from texture storage section and maps the read environment texture onto the object in a direction toward the object from above the object independently of a position or a rotational angle of a virtual camera; and a drawing section which draws an image viewed from the virtual camera within an object space in which the object moves with changing rotation angle, wherein a rotation matrix obtained based on the rotational angle of the object about each of axes in a world coordinate system is used to rotate a normal vector of a surface of the object, and wherein first and second texture coordinates for reading the environment texture out from the texture storage section are obtained based on first and second coordinates of the rotated normal vector.