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A Smooth Surface Based on Biquadratic Patches
September 1984 (vol. 4 no. 9)
pp. 20-23
Herbert Steinberg, MAGI, Mathematical Applications Group, Inc.
Ray tracing can generate high-quality color images of free-form surfaces. To reduce CPU time, introduce extra knots into the system and use biquadratics instead of bicubics.

1. S.A.Coons, “Surfaces for Computer-Aided Design of Space Forms,” , Project MAC, MIT Press 1964 project report (revised to MAC-TR-41,1967)
2. R.A.Goldstein and R.Nagel, “3-D Visual Simulation,” Simulation Vol. 16, No. 1, pp. 25-31 Jan. 1971
3. J.T.Kajiya, “Ray Tracing Parametric Patches,” Computer Graphics, (Proc.Siggraph 82) July 1982 Vol. 16, No. 2, pp. 245-254

Citation:
Herbert Steinberg, "A Smooth Surface Based on Biquadratic Patches," IEEE Computer Graphics and Applications, vol. 4, no. 9, pp. 20-23, Sept. 1984, doi:10.1109/MCG.1984.275992
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