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Bugfix: medial axis missed some segments. #2144

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This commit is contained in:
Alessandro Ranellucci 2014-08-03 15:03:11 +02:00
parent e897fbbd51
commit 30fa055995
6 changed files with 48 additions and 8 deletions
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9
xs/src/Geometry.cpp
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@ -270,15 +270,14 @@ MedialAxis::is_valid_edge(const VD::edge_type& edge) const
if (segment1.a == segment2.b || segment1.b == segment2.a) return false;
// calculate relative angle between the two boundary segments
Vector vec1 = segment1.vector();
Vector vec2 = segment2.vector();
double angle = atan2(vec1.x*vec2.y - vec1.y*vec2.x, vec1.x*vec2.x + vec1.y*vec2.y);
double angle = fabs(segment2.orientation() - segment1.orientation());
// fabs(angle) ranges from 0 (collinear, same direction) to PI (collinear, opposite direction)
// we're interested only in segments close to the second case (facing segments)
// so we allow some tolerance (say, 30°)
if (fabs(angle) < PI - PI/3) return false;
if (angle < PI*2/3 ) {
return false;
}
// each vertex is equidistant to both cell segments
// but such distance might differ between the two vertices;