Rendering perspective views of a scene using a scanline-coherent look-up table

摘要

A method and apparatus for rendering perspective views of a 3D scene. The method of the present invention includes the steps of: providing an environment map containing pixel values representing the scene; generating a scanline-coherent look-up table containing environment map indices ordered in scanlines; mapping scanlines of a viewing plane to a portion of the look-up table scanlines based upon a pitch angle of the perspective view to be rendered; locating pixel values in a portion of the environment map based on a yaw angle and based on the environment map indices stored in the portion of the look-up table scanlines to which the viewing plane scanlines are mapped; writing the located pixel values into the viewing plane; and rendering the viewing plane onto a display.