Boots – shoes – and leggings
Patent
1989-10-31
1993-06-22
Harkcom, Gary V.
Boots, shoes, and leggings
395123, 395124, 36441322, 36441319, G06F 1572, G06F 1542
Patent
active
052222012
ABSTRACT:
The problems of selection of objects having complex shapes and usually apprehended by a plurality of facets are solved by making use of curved surfaces, the equation of which is of the second degree. In a test calculation for checking whether a node of an octree decomposition does or does not belong to the surface thus defined, the terms of the second degree are replaced by a constant. It is shown that this approximation permits rapid determination of the complex shapes without having to perform the calculations corresponding to the second degree. The method also permits easy determination of the normal to the object for calculation of shadowing when it is employed for display.
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Bayerl Raymond J.
General Electric CGR SA
Harkcom Gary V.
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