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Bugfix: when the Voronoi diagram contained very large coordinates we need to check whether they are greater than our allowed range and consider the Voronoi edges infinite in those cases, in order to prevent overflows.

Browse source 
https://github.com/alexrj/Slic3r/issues/3776
9ad1360e44
This commit is contained in:
bubnikv 2017-03-24 09:32:30 +01:00
parent 6162670bbd
commit 0dae43e4bc
3 changed files with 17 additions and 9 deletions
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7
xs/src/libslic3r/Geometry.cpp
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@ -983,6 +983,13 @@ MedialAxis::process_edge_neighbors(const VD::edge_type* edge, ThickPolyline* pol
bool
MedialAxis::validate_edge(const VD::edge_type* edge)
{
// prevent overflows and detect almost-infinite edges
if (std::abs(edge->vertex0()->x()) > double(CLIPPER_MAX_COORD_UNSCALED) ||
std::abs(edge->vertex0()->y()) > double(CLIPPER_MAX_COORD_UNSCALED) ||
std::abs(edge->vertex1()->x()) > double(CLIPPER_MAX_COORD_UNSCALED) ||
std::abs(edge->vertex1()->y()) > double(CLIPPER_MAX_COORD_UNSCALED))
return false;
// construct the line representing this edge of the Voronoi diagram
const Line line(
Point( edge->vertex0()->x(), edge->vertex0()->y() ),