A Fast Enviroment Mapping Technique for Visual Simulation
Limin Zhang · Jisuanji fangzhen · 2007
Environment mapping is an effective technique to render diffuse and glossy reflections.To realize realistic rendering of the scene in applying environment mapping to scene simulation,an approach for fast calculating diffuse environment maps is proposed from an analysis of spherical harmonics.To simplify filtering of environment maps for glossy reflections,a cube map representation is used together with a simple box-filter instead of the Phong cosine kernel.In the end,fast rendering is achieved by generating a mip-map of the specular environment map.The experimental result shows that this technique not only renders realistic objects but also satisfies interactive requirements,so it is well-suited for visual simulation applications.