Patent ID: 7616802
Filing Date: 2009-11-10
Classification: G06T

Abstract:
1. A circuit that computes a reflection intensity for calculating a reflection intensity of computer graphics images, defining the object surface by a set of polygons that have both or either microscopic grooves or partial areas of different reflectance, comprising: a means for obtaining a surface normal vector N at every polygon vertex; a means for obtaining a light-source incidence L at every polygon vertex; a means for obtaining a view vector V at every polygon vertex; a means for obtaining a texture mapping address (U,V) at every polygon vertex; a means for interpolating the values of said surface normal vector N, said light-source incidence vector L, said view vector V and said texture mapping address (U,V) on polygon interior; a means for reading a surface tangent vector Ti using the interpolated texture mapping address, from memory that stores the surface tangent vector Ti that is addressed by interpolated texture mapping address; and a means for computing a light-reflection intensity at each interpolated point of polygon interior using interpolated value of surface tangent Ti, interpolated value of surface normal vector Ni, interpolated value of light-source incidence vector Li and interpolated value of view vector Vi.