3DPrinting/PrusaSlicer-NonPlainar
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cut_mesh(): new parameter to optionally not triangulate the caps.

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This commit is contained in:
Vojtech Bubnik 2021-05-19 13:52:47 +02:00
parent 66cf7ea9d3
commit e952aded78
2 changed files with 33 additions and 28 deletions
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58
src/libslic3r/TriangleMeshSlicer.cpp
View file

@ -1179,6 +1179,7 @@ std::vector<ExPolygons> slice_mesh_ex(
return layers;
}
// Remove duplicates of slice_vertices, optionally triangulate the cut.
static void triangulate_slice(
indexed_triangle_set &its,
IntersectionLines &lines,
@ -1186,7 +1187,8 @@ static void triangulate_slice(
// Vertices of the original (unsliced) mesh. Newly added vertices are those on the slice.
int num_original_vertices,
// Z height of the slice.
float z)
float z,
bool triangulate)
{
sort_remove_duplicates(slice_vertices);
@ -1230,33 +1232,35 @@ static void triangulate_slice(
f(i) = map_duplicate_vertex[f(i) - num_original_vertices];
}
size_t idx_vertex_new_first = its.vertices.size();
Pointf3s triangles = triangulate_expolygons_3d(make_expolygons_simple(lines), z, true);
for (size_t i = 0; i < triangles.size(); ) {
stl_triangle_vertex_indices facet;
for (size_t j = 0; j < 3; ++ j) {
Vec3f v = triangles[i ++].cast<float>();
auto it = lower_bound_by_predicate(map_vertex_to_index.begin(), map_vertex_to_index.end(),
[&v](const std::pair<Vec2f, int> &l) { return l.first.x() < v.x() || (l.first.x() == v.x() && l.first.y() < v.y()); });
int idx = -1;
if (it != map_vertex_to_index.end() && it->first.x() == v.x() && it->first.y() == v.y())
idx = it->second;
else {
// Try to find the vertex in the list of newly added vertices. Those vertices are not matched on the cut and they shall be rare.
for (size_t k = idx_vertex_new_first; k < its.vertices.size(); ++ k)
if (its.vertices[k] == v) {
idx = int(k);
break;
if (triangulate) {
size_t idx_vertex_new_first = its.vertices.size();
Pointf3s triangles = triangulate_expolygons_3d(make_expolygons_simple(lines), z, true);
for (size_t i = 0; i < triangles.size(); ) {
stl_triangle_vertex_indices facet;
for (size_t j = 0; j < 3; ++ j) {
Vec3f v = triangles[i ++].cast<float>();
auto it = lower_bound_by_predicate(map_vertex_to_index.begin(), map_vertex_to_index.end(),
[&v](const std::pair<Vec2f, int> &l) { return l.first.x() < v.x() || (l.first.x() == v.x() && l.first.y() < v.y()); });
int idx = -1;
if (it != map_vertex_to_index.end() && it->first.x() == v.x() && it->first.y() == v.y())
idx = it->second;
else {
// Try to find the vertex in the list of newly added vertices. Those vertices are not matched on the cut and they shall be rare.
for (size_t k = idx_vertex_new_first; k < its.vertices.size(); ++ k)
if (its.vertices[k] == v) {
idx = int(k);
break;
}
if (idx == -1) {
idx = int(its.vertices.size());
its.vertices.emplace_back(v);
}
if (idx == -1) {
idx = int(its.vertices.size());
its.vertices.emplace_back(v);
}
facet(j) = idx;
}
facet(j) = idx;
if (facet(0) != facet(1) && facet(0) != facet(2) && facet(1) != facet(2))
its.indices.emplace_back(facet);
}
if (facet(0) != facet(1) && facet(0) != facet(2) && facet(1) != facet(2))
its.indices.emplace_back(facet);
}
// Remove vertices, which are not referenced by any face.
@ -1266,7 +1270,7 @@ static void triangulate_slice(
// its_remove_degenerate_faces(its);
}
void cut_mesh(const indexed_triangle_set &mesh, float z, indexed_triangle_set *upper, indexed_triangle_set *lower)
void cut_mesh(const indexed_triangle_set &mesh, float z, indexed_triangle_set *upper, indexed_triangle_set *lower, bool triangulate_caps)
{
assert(upper || lower);
if (upper == nullptr && lower == nullptr)
@ -1413,10 +1417,10 @@ void cut_mesh(const indexed_triangle_set &mesh, float z, indexed_triangle_set *u
}
if (upper != nullptr)
triangulate_slice(*upper, upper_lines, upper_slice_vertices, int(mesh.vertices.size()), z);
triangulate_slice(*upper, upper_lines, upper_slice_vertices, int(mesh.vertices.size()), z, triangulate_caps);
if (lower != nullptr)
triangulate_slice(*lower, lower_lines, lower_slice_vertices, int(mesh.vertices.size()), z);
triangulate_slice(*lower, lower_lines, lower_slice_vertices, int(mesh.vertices.size()), z, triangulate_caps);
}
}

3
src/libslic3r/TriangleMeshSlicer.hpp
View file

@ -76,7 +76,8 @@ void cut_mesh(
const indexed_triangle_set &mesh,
float z,
indexed_triangle_set *upper,
indexed_triangle_set *lower);
indexed_triangle_set *lower,
bool triangulate_caps = true);
}