December 2013
Intermediate to advanced
508 pages
16h 50m
English
Content preview from Practical Algorithms for 3D Computer Graphics, 2nd Edition
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420 10. Modeling with polygonal datasets
Points of
intersection
Work facet
Line of intersection
(c)(b)(a)
Figure 10.46: (a) A plan view of some facet s in the Work list. (b) Adding the (edge on)
view of facets in th e Tool list shows the line of i nter s ection. (c) T h e line of intersection
will pass through the points of intersection between edges of facets in the Tool list and
facets in the Work list and vice versa. There are no other places where it can cha n g e
direction.
• Phase 2: For every edge of a facet in the Work list find its point(s) of
intersection with a facet in the Tool list.
Figure 10.46(c) highlights where these points are for that
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