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Use poly2tri for triangulation. This fixes some cases where polyPartition couldn't triangulate successfully. Reported as issue #9 in polyPartition repository. Tested with MotorHalter_0.stl cut at 1.2

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This commit is contained in:
Alessandro Ranellucci 2014-05-01 12:07:11 +02:00
parent 60f640f100
commit edeb0a90dd
19 changed files with 2830 additions and 6 deletions
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45
xs/src/ExPolygon.cpp
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@ -5,6 +5,7 @@
#include "Line.hpp"
#include "ClipperUtils.hpp"
#include "polypartition.h"
#include "poly2tri/poly2tri.h"
#ifdef SLIC3RXS
#include "perlglue.hpp"
#endif
@ -312,6 +313,50 @@ ExPolygon::triangulate_pp(Polygons* polygons) const
}
}
void
ExPolygon::triangulate_p2t(Polygons* polygons) const
{
ExPolygons expp;
simplify_polygons(*this, expp, true);
for (ExPolygons::const_iterator ex = expp.begin(); ex != expp.end(); ++ex) {
p2t::CDT* cdt;
// TODO: prevent duplicate points
// contour
{
std::vector<p2t::Point*> points;
for (Points::const_iterator point = ex->contour.points.begin(); point != ex->contour.points.end(); ++point) {
points.push_back(new p2t::Point(point->x, point->y));
}
cdt = new p2t::CDT(points);
}
// holes
for (Polygons::const_iterator hole = ex->holes.begin(); hole != ex->holes.end(); ++hole) {
std::vector<p2t::Point*> points;
for (Points::const_iterator point = hole->points.begin(); point != hole->points.end(); ++point) {
points.push_back(new p2t::Point(point->x, point->y));
}
cdt->AddHole(points);
}
// perform triangulation
cdt->Triangulate();
std::vector<p2t::Triangle*> triangles = cdt->GetTriangles();
for (std::vector<p2t::Triangle*>::const_iterator triangle = triangles.begin(); triangle != triangles.end(); ++triangle) {
Polygon p;
for (int i = 0; i <= 2; ++i) {
p2t::Point* point = (*triangle)->GetPoint(i);
p.points.push_back(Point(point->x, point->y));
}
polygons->push_back(p);
}
}
}
#ifdef SLIC3RXS
REGISTER_CLASS(ExPolygon, "ExPolygon");