AG 1   Info

AG Audience

English

30 Minutes

Saarbrücken

We present the first exact, complete and efficient implementation that computes for a given set $P=\{p_1,\dots,p_n\}$ of quadric surfaces the planar map induced by all intersection curves $p_1\cap p_i$, $2\leq i\leq n$, running on the surface of $p_1$. The vertices in this graph are the singular and $x$-extreme points of the curves as well as all intersection points of pairs of curves. Two vertices are connected by an edge if the underlying points are connected by a branch of one of the curves.

Our implementation is complete in the sense that it can handle all kind of inputs including all degenerate ones where intersection curves have singularities or pairs of curves intersect with high multiplicity. It is exact in that it always computes the mathematical correct result. It is efficient measured in running times.

Eric Berberich

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SoCG '05 Rehearsal Talk