Method and apparatus for generating representations of 3-dimensi

Details Method and apparatus for generating representations of 3-dimensi Method and apparatus for generating representations of 3-dimensi

1990-03-13

1991-04-23

Shaw, Dale M.

Boots, shoes, and leggings

36447424, G06F 1560

Patent

active

050105027

ABSTRACT:
A computer aided design (CAD) system has the capability of operating in either a 2D or a 3D mode. In 2D mode, the system uses only instructions contained in a 2D instruction memory and executes only instructions relating to 2D geometry. Upon receipt of a command relating to 3D geometry, the system performs a 2D to 3D transformation, performs a topolgy check, transfers control to a 3D instruction memory and performs instructions relating to 3D geometry.

REFERENCES:
patent: 4549275 (1985-10-01), Sukonick
patent: 4586145 (1986-04-01), Bracewell et al.
patent: 4641270 (1987-02-01), Lalloz et al.
patent: 4721952 (1988-01-01), Huber
patent: 4736306 (1988-04-01), Christensen et al.

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