System and method for environment mapping

Details System and method for environment mapping System and method for environment mapping

2006-05-16

2006-05-16

Nguyen, Phu K. (Department: 2673)

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

C345S582000

Reexamination Certificate

active

07046245

ABSTRACT:
A system and method for environment mapping determines a computer-generated object's reflective appearance, based upon position and orientation of a camera with respect to the object's location. The present invention is implemented as a real-time environment mapping for polygon rendering, however, the scope of the invention covers other rendering schemes. According to one embodiment of the present invention, a vector processing unit (VPU) uses a modified reflection formula to compute reflective properties of an object. The modified reflection formula is:r=e−(e·(n+eo))(n+eo)/(1−nz)=e−(e·[nx, ny, nz−1])[nx, ny, nz−1]/(1−nz), where eo=[0,0,−1], and nx, ny, and nz are the components of the surface normal vector, n.

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Foley et al., Computer Graphics: Principles and Practice, Oct. 1996; pp. 721-745.

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