G - Physics – 06 – T
Patent
G - Physics
06
T
354/147
G06T 17/20 (2006.01)
Patent
CA 1237524
ABSTRACT OF THE DISCLOSURE A geometric processing system comprising a data converter means which divides a plane forming a graphic model into one or a plurality of triangles by diagonal lines drawn from a vertex thereof, and which produces vertex coordinates of triangles. Relying upon the data from the data converter means, a normal vector operation means finds normal vectors pointing outwardly of the triangles and point at infinity coordinates thereof. An interference test operation means calculates values of 4 x 4 determinants as well as logic values of the determinants; and interference point coordinate calculation means operates in reliance upon the operated result of the interference test operation means. The vertex coordinates of two triangles extracted from a figure for determining the interference and point at infinity coordinates thereof, are suitably selected to imagine a triangle. A 4 x 4 determinant is constituted by a vertex coordinate of the triangle and by a coordinate of another given point, and the 4 x 4 determinant is operated by the operation means, and the interference point coordinate calculation means is operated based upon the operated result.
476109
Borden Ladner Gervais Llp
Seiko Instruments Inc.
Yamaguchi Fujio
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