Shared N-patch edges

Details Shared N-patch edges Shared N-patch edges

2006-11-28

2006-11-28

Nguyen, Phu K. (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

C345S423000, C345S428000

Reexamination Certificate

active

07142206

ABSTRACT:
Method and apparatus for shaping a shared edge between two or more N-patches is described. More particularly, vertices and normals of a polygon, tristip, quadstrip and so on, are obtained. Shared vertices corresponding to the shared edge are identified. When normal vectors at a shared vertex are determined to differ, tangents of the normal vectors are computed. These tangents may be used to optionally shape the shared edge, along with control points.

REFERENCES:
patent: 5014230 (1991-05-01), Sinha et al.
ATI Technologies White Paper, Truform, pp. 1-10, May 2001.

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