3D-printing/OrcaSlicer
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New --cut feature

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This commit is contained in:
Alessandro Ranellucci 2014-04-25 10:20:30 +02:00
parent 37c7b958d4
commit fe1691c151
7 changed files with 117 additions and 21 deletions
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76
xs/src/TriangleMesh.cpp
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@ -755,7 +755,7 @@ TriangleMeshSlicer::make_expolygons(std::vector<IntersectionLine> &lines, ExPoly
void
TriangleMeshSlicer::cut(float z, TriangleMesh* upper, TriangleMesh* lower)
{
std::vector<IntersectionLine> lines;
std::vector<IntersectionLine> upper_lines, lower_lines;
float scaled_z = scale_(z);
for (int facet_idx = 0; facet_idx < this->mesh->stl.stats.number_of_facets; facet_idx++) {
@ -766,13 +766,26 @@ TriangleMeshSlicer::cut(float z, TriangleMesh* upper, TriangleMesh* lower)
float max_z = fmaxf(facet->vertex[0].z, fmaxf(facet->vertex[1].z, facet->vertex[2].z));
// intersect facet with cutting plane
std::vector<IntersectionLine> lines;
this->slice_facet(scaled_z, *facet, facet_idx, min_z, max_z, &lines);
// save intersection lines for generating correct triangulations
for (std::vector<IntersectionLine>::iterator it = lines.begin(); it != lines.end(); ++it) {
if (it->edge_type == feTop) {
lower_lines.push_back(*it);
} else if (it->edge_type == feBottom) {
upper_lines.push_back(*it);
} else if (it->edge_type != feHorizontal) {
lower_lines.push_back(*it);
upper_lines.push_back(*it);
}
}
if (min_z > z || (min_z == z && max_z > min_z)) {
// facet is above the cut plane but does not belong to it
// facet is above the cut plane and does not belong to it
if (upper != NULL) stl_add_facet(&upper->stl, facet);
} else if (max_z < z || (max_z == z && max_z > min_z)) {
// facet is below the cut plane but does not belong to it
// facet is below the cut plane and does not belong to it
if (lower != NULL) stl_add_facet(&lower->stl, facet);
} else if (min_z < z && max_z > z) {
// facet is cut by the slicing plane
@ -803,18 +816,21 @@ TriangleMeshSlicer::cut(float z, TriangleMesh* upper, TriangleMesh* lower)
// build the triangular facet
stl_facet triangle;
triangle.normal = facet->normal;
triangle.vertex[0] = *v0;
triangle.vertex[1] = v0v1;
triangle.vertex[2] = v2v0;
// build the facets forming a quadrilateral on the other side
stl_facet quadrilateral[2];
quadrilateral[0].normal = facet->normal;
quadrilateral[0].vertex[0] = *v1;
quadrilateral[0].vertex[1] = *v2;
quadrilateral[0].vertex[2] = v0v1;
quadrilateral[1].normal = facet->normal;
quadrilateral[1].vertex[0] = *v2;
quadrilateral[1].vertex[0] = v2v0;
quadrilateral[1].vertex[0] = v0v1;
quadrilateral[1].vertex[1] = v2v0;
quadrilateral[1].vertex[2] = v0v1;
if (v0->z > z) {
if (upper != NULL) stl_add_facet(&upper->stl, &triangle);
@ -832,9 +848,53 @@ TriangleMeshSlicer::cut(float z, TriangleMesh* upper, TriangleMesh* lower)
}
}
// compute shape of section
ExPolygons section;
this->make_expolygons(lines, &section);
// triangulate holes of upper mesh
if (upper != NULL) {
// compute shape of section
ExPolygons section;
this->make_expolygons(upper_lines, &section);
// triangulate section
Polygons triangles;
for (ExPolygons::const_iterator expolygon = section.begin(); expolygon != section.end(); ++expolygon)
expolygon->triangulate(&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;
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);
}
}
// triangulate holes of lower mesh
if (lower != NULL) {
// compute shape of section
ExPolygons section;
this->make_expolygons(lower_lines, &section);
// triangulate section
Polygons triangles;
for (ExPolygons::const_iterator expolygon = section.begin(); expolygon != section.end(); ++expolygon)
expolygon->triangulate(&triangles);
// convert triangles to facets and append them to mesh
for (Polygons::const_iterator polygon = triangles.begin(); polygon != triangles.end(); ++polygon) {
stl_facet facet;
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_get_size(&(upper->stl));