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Ported traverse_pt() to XS

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This commit is contained in:
Alessandro Ranellucci 2013-11-23 23:21:59 +01:00
parent b47b8ee34f
commit a93c862338
9 changed files with 71 additions and 27 deletions
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37
xs/src/ClipperUtils.cpp
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@ -1,4 +1,5 @@
#include "ClipperUtils.hpp"
#include "Geometry.hpp"
namespace Slic3r {
@ -385,6 +386,42 @@ void union_pt(const Slic3r::Polygons &subject, ClipperLib::PolyTree &retval, boo
_clipper_do<ClipperLib::PolyTree>(ClipperLib::ctUnion, subject, clip, retval, ClipperLib::pftEvenOdd, safety_offset_);
}
void union_pt_chained(const Slic3r::Polygons &subject, Slic3r::Polygons &retval, bool safety_offset_)
{
ClipperLib::PolyTree pt;
union_pt(subject, pt, safety_offset_);
traverse_pt(pt.Childs, retval);
}
static void traverse_pt(ClipperLib::PolyNodes &nodes, Slic3r::Polygons &retval)
{
/* use a nearest neighbor search to order these children
TODO: supply start_near to chained_path() too? */
// collect ordering points
Points ordering_points;
ordering_points.reserve(nodes.size());
for (ClipperLib::PolyNodes::const_iterator it = nodes.begin(); it != nodes.end(); ++it) {
Point p((*it)->Contour.front().X, (*it)->Contour.front().Y);
ordering_points.push_back(p);
}
// perform the ordering
ClipperLib::PolyNodes ordered_nodes;
Slic3r::Geometry::chained_path_items(ordering_points, nodes, ordered_nodes);
// push results recursively
for (ClipperLib::PolyNodes::iterator it = ordered_nodes.begin(); it != ordered_nodes.end(); ++it) {
// traverse the next depth
traverse_pt((*it)->Childs, retval);
Polygon p;
ClipperPath_to_Slic3rMultiPoint((*it)->Contour, p);
retval.push_back(p);
if ((*it)->IsHole()) retval.back().reverse(); // ccw
}
}
void simplify_polygons(const Slic3r::Polygons &subject, Slic3r::Polygons &retval)
{
// convert into Clipper polygons