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Eradicated admesh from TriangleMesh:

Browse source 
TriangleMesh newly only holds indexed_triangle_set and
TriangleMeshStats. TriangleMeshStats contains an excerpt of stl_stats.
TriangleMeshStats are updated when initializing with indexed_triangle_set.

Admesh triangle mesh fixing is newly only used when loading an STL.
AMF / 3MF / OBJ file formats are already indexed triangle sets, thus
they are no more converted to admesh stl_file format, nor fixed
through admesh repair machinery. When importing AMF / 3MF / OBJ files,
volume is calculated and if negative, all faces are flipped. Also
a bounding box and number of open edges is calculated.

Implemented its_number_of_patches(), its_num_open_edges()
Optimized its_split(), its_is_splittable() using a visitor pattern.

Reworked QHull integration into TriangleMesh:
    1) Face normals were not right.
    2) Indexed triangle set is newly emitted instead of duplicating
       vertices for each face.

Fixed cut_mesh(): Orient the triangulated faces correctly.
This commit is contained in:
Vojtech Bubnik 2021-09-20 17:12:22 +02:00
parent f484953a5a
commit 8a2a9dba2f
59 changed files with 1056 additions and 1758 deletions
Download patch file Download diff file Expand all files Collapse all files

60
src/libslic3r/Format/AMF.cpp
View file

@ -244,11 +244,11 @@ struct AMFParserContext
// Map from obect name to object idx & instances.
std::map<std::string, Object> m_object_instances_map;
// Vertices parsed for the current m_object.
std::vector<float> m_object_vertices;
std::vector<Vec3f> m_object_vertices;
// Current volume allocated for an amf/object/mesh/volume subtree.
ModelVolume *m_volume { nullptr };
// Faces collected for the current m_volume.
std::vector<int> m_volume_facets;
std::vector<Vec3i> m_volume_facets;
// Transformation matrix of a volume mesh from its coordinate system to Object's coordinate system.
Transform3d m_volume_transform;
// Current material allocated for an amf/metadata subtree.
@ -598,9 +598,7 @@ void AMFParserContext::endElement(const char * /* name */)
case NODE_TYPE_VERTEX:
assert(m_object);
// Parse the vertex data
m_object_vertices.emplace_back((float)atof(m_value[0].c_str()));
m_object_vertices.emplace_back((float)atof(m_value[1].c_str()));
m_object_vertices.emplace_back((float)atof(m_value[2].c_str()));
m_object_vertices.emplace_back(float(atof(m_value[0].c_str())), float(atof(m_value[1].c_str())), float(atof(m_value[1].c_str())));
m_value[0].clear();
m_value[1].clear();
m_value[2].clear();
@ -609,9 +607,7 @@ void AMFParserContext::endElement(const char * /* name */)
// Faces of the current volume:
case NODE_TYPE_TRIANGLE:
assert(m_object && m_volume);
m_volume_facets.emplace_back(atoi(m_value[0].c_str()));
m_volume_facets.emplace_back(atoi(m_value[1].c_str()));
m_volume_facets.emplace_back(atoi(m_value[2].c_str()));
m_volume_facets.emplace_back(atoi(m_value[0].c_str()), atoi(m_value[1].c_str()), atoi(m_value[2].c_str()));
m_value[0].clear();
m_value[1].clear();
m_value[2].clear();
@ -621,44 +617,36 @@ void AMFParserContext::endElement(const char * /* name */)
case NODE_TYPE_VOLUME:
{
assert(m_object && m_volume);
TriangleMesh mesh;
stl_file &stl = mesh.stl;
stl.stats.type = inmemory;
stl.stats.number_of_facets = int(m_volume_facets.size() / 3);
stl.stats.original_num_facets = stl.stats.number_of_facets;
stl_allocate(&stl);
bool has_transform = ! m_volume_transform.isApprox(Transform3d::Identity(), 1e-10);
for (size_t i = 0; i < m_volume_facets.size();) {
stl_facet &facet = stl.facet_start[i/3];
for (unsigned int v = 0; v < 3; ++v)
{
unsigned int tri_id = m_volume_facets[i++] * 3;
if (tri_id < 0 || tri_id + 2 >= m_object_vertices.size()) {
// Verify validity of face indices.
for (Vec3i face : m_volume_facets)
for (unsigned int tri_id : face)
if (tri_id < 0 || tri_id >= m_object_vertices.size()) {
this->stop("Malformed triangle mesh");
return;
}
facet.vertex[v] = Vec3f(m_object_vertices[tri_id + 0], m_object_vertices[tri_id + 1], m_object_vertices[tri_id + 2]);
}
}
stl_get_size(&stl);
mesh.repair();
m_volume->set_mesh(std::move(mesh));
// stores the volume matrix taken from the metadata, if present
if (has_transform)
m_volume->source.transform = Slic3r::Geometry::Transformation(m_volume_transform);
if (m_volume->source.input_file.empty() && (m_volume->type() == ModelVolumeType::MODEL_PART))
{
TriangleMesh triangle_mesh { std::move(m_object_vertices), std::move(m_volume_facets) };
if (triangle_mesh.volume() < 0)
triangle_mesh.flip_triangles();
m_volume->set_mesh(std::move(triangle_mesh));
}
// stores the volume matrix taken from the metadata, if present
if (bool has_transform = !m_volume_transform.isApprox(Transform3d::Identity(), 1e-10); has_transform)
m_volume->source.transform = Slic3r::Geometry::Transformation(m_volume_transform);
if (m_volume->source.input_file.empty() && (m_volume->type() == ModelVolumeType::MODEL_PART)) {
m_volume->source.object_idx = (int)m_model.objects.size() - 1;
m_volume->source.volume_idx = (int)m_model.objects.back()->volumes.size() - 1;
m_volume->center_geometry_after_creation();
}
else
} else
// pass false if the mesh offset has been already taken from the data
m_volume->center_geometry_after_creation(m_volume->source.input_file.empty());
m_volume->calculate_convex_hull();
m_volume_facets.clear();
m_object_vertices.clear();
m_volume = nullptr;
break;
}
@ -1187,10 +1175,6 @@ bool store_amf(const char* path, Model* model, const DynamicPrintConfig* config,
int num_vertices = 0;
for (ModelVolume *volume : object->volumes) {
vertices_offsets.push_back(num_vertices);
if (! volume->mesh().repaired)
throw Slic3r::FileIOError("store_amf() requires repair()");
if (! volume->mesh().has_shared_vertices())
throw Slic3r::FileIOError("store_amf() requires shared vertices");
const indexed_triangle_set &its = volume->mesh().its;
const Transform3d& matrix = volume->get_matrix();
for (size_t i = 0; i < its.vertices.size(); ++i) {