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Finished --cut implementation

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This commit is contained in:
Alessandro Ranellucci 2014-04-25 12:40:21 +02:00
parent fe1691c151
commit 4f5d9ca795
8 changed files with 2009 additions and 10 deletions
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56
xs/src/TriangleMesh.cpp
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@ -680,6 +680,40 @@ class _area_comp {
std::vector<double>* abs_area;
};
void
TriangleMeshSlicer::make_expolygons_simple(std::vector<IntersectionLine> &lines, ExPolygons* slices)
{
Polygons loops;
this->make_loops(lines, &loops);
Polygons cw;
for (Polygons::const_iterator loop = loops.begin(); loop != loops.end(); ++loop) {
if (loop->area() >= 0) {
ExPolygon ex;
ex.contour = *loop;
slices->push_back(ex);
} else {
cw.push_back(*loop);
}
}
// assign holes to contours
for (Polygons::const_iterator loop = cw.begin(); loop != cw.end(); ++loop) {
int slice_idx = -1;
double current_contour_area = -1;
for (ExPolygons::iterator slice = slices->begin(); slice != slices->end(); ++slice) {
if (slice->contour.contains_point(loop->points.front())) {
double area = slice->contour.area();
if (area < current_contour_area || current_contour_area == -1) {
slice_idx = slice - slices->begin();
current_contour_area = area;
}
}
}
(*slices)[slice_idx].holes.push_back(*loop);
}
}
void
TriangleMeshSlicer::make_expolygons(const Polygons &loops, ExPolygons* slices)
{
@ -852,24 +886,27 @@ TriangleMeshSlicer::cut(float z, TriangleMesh* upper, TriangleMesh* lower)
if (upper != NULL) {
// compute shape of section
ExPolygons section;
this->make_expolygons(upper_lines, &section);
this->make_expolygons_simple(upper_lines, &section);
// triangulate section
Polygons triangles;
for (ExPolygons::const_iterator expolygon = section.begin(); expolygon != section.end(); ++expolygon)
expolygon->triangulate(&triangles);
expolygon->triangulate2(&triangles);
// convert triangles to facets and append them to mesh
for (Polygons::const_iterator polygon = triangles.begin(); polygon != triangles.end(); ++polygon) {
Polygon p = *polygon;
p.reverse();
stl_facet facet;
facet.normal.x = 0;
facet.normal.y = 0;
facet.normal.z = -1;
for (size_t i = 0; i <= 2; ++i) {
facet.vertex[i].x = unscale(p.points[i].x);
facet.vertex[i].y = unscale(p.points[i].y);
facet.vertex[i].z = z;
}
//stl_add_facet(&upper->stl, &facet);
stl_add_facet(&upper->stl, &facet);
}
}
@ -877,29 +914,32 @@ TriangleMeshSlicer::cut(float z, TriangleMesh* upper, TriangleMesh* lower)
if (lower != NULL) {
// compute shape of section
ExPolygons section;
this->make_expolygons(lower_lines, &section);
this->make_expolygons_simple(lower_lines, &section);
// triangulate section
Polygons triangles;
for (ExPolygons::const_iterator expolygon = section.begin(); expolygon != section.end(); ++expolygon)
expolygon->triangulate(&triangles);
expolygon->triangulate2(&triangles);
// convert triangles to facets and append them to mesh
for (Polygons::const_iterator polygon = triangles.begin(); polygon != triangles.end(); ++polygon) {
stl_facet facet;
facet.normal.x = 0;
facet.normal.y = 0;
facet.normal.z = 1;
for (size_t i = 0; i <= 2; ++i) {
facet.vertex[i].x = unscale(polygon->points[i].x);
facet.vertex[i].y = unscale(polygon->points[i].y);
facet.vertex[i].z = z;
}
//stl_add_facet(&lower->stl, &facet);
stl_add_facet(&lower->stl, &facet);
}
}
/*
stl_get_size(&(upper->stl));
stl_get_size(&(lower->stl));
*/
}
TriangleMeshSlicer::TriangleMeshSlicer(TriangleMesh* _mesh) : mesh(_mesh), v_scaled_shared(NULL)