Mathematical elements for computer graphics (2nd ed.)
Mathematical elements for computer graphics (2nd ed.)
Communications of the ACM
Computer Aided Geometric Design; Proceedings of a Conference Held at the University of Utah, Salt Lake City, Utah, March 18-21, 1974
The architecture of the picture system
ISCA '75 Proceedings of the 2nd annual symposium on Computer architecture
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An experimental interactive system for the design of a class of curved surfaces is described. The surfaces are initially designed by specifying a set of closed curves representing sections through the surface. Subsequent distortion of these curves allows more freedom in the shape and a more compact representation of the surface. Extensive visual feedback is provided throughout the design of the surface using a vector display. Where a better representation is needed, the surface may be represented as a solid using a sub-system for generation of shaded pictures. The vector system attempts to provide real-time feedback during the design phase while the shaded system provides a different, and sometimes more valuable perspective. In a closing section an attempt is made to evaluate the strengths and failures of the system.