Principles of interactive computer graphics (2nd ed.)
Principles of interactive computer graphics (2nd ed.)
Computer animation of the sphere eversion
SIGGRAPH '75 Proceedings of the 2nd annual conference on Computer graphics and interactive techniques
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At Carnegie Mellon University, the PDP-10 and PDP-11 computers have been used to trace thin sections of stained neurons in a lobster swimmeret ganglion, and to reconstruct the global structure of the neuron from the sections. This paper will present two sorts of graphic pictures of the final reconstructed neuron; vector drawings with hidden lines, and shaded raster drawings of the neuron inside a transparent shell representing the outer surface of the ganglion. The hidden line program handles curving cylindrical tubes of varying radii, and shows only the visible contours. The raster program is a modification of Sproul's version of the Watkins Algorithm, and applies Phong shading to both opaque and semi-transparent surfaces. The shaded output is rendered on the Carnegie-Mellon video system.