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Fixed import of multi-material AMF files, broken due to admesh eradication.

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This commit is contained in:
Vojtech Bubnik 2021-10-01 13:34:22 +02:00
parent bac7d2b961
commit afbbb36fa4
2 changed files with 28 additions and 13 deletions
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2
src/libslic3r/Format/3mf.cpp
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@ -1922,7 +1922,7 @@ namespace Slic3r {
{
int min_id = its.indices.front()[0];
int max_id = min_id;
for (const Vec3i& face : its.indices) {
for (const Vec3i face : its.indices) {
for (const int tri_id : face) {
if (tri_id < 0 || tri_id >= int(geometry.vertices.size())) {
add_error("Found invalid vertex id");

39
src/libslic3r/Format/AMF.cpp
View file

@ -617,19 +617,35 @@ void AMFParserContext::endElement(const char * /* name */)
case NODE_TYPE_VOLUME:
{
assert(m_object && m_volume);
// 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;
}
if (m_volume_facets.empty()) {
this->stop("An empty triangle mesh found");
return;
}
{
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));
// Verify validity of face indices, find the vertex span.
int min_id = m_volume_facets.front()[0];
int max_id = min_id;
for (const Vec3i face : m_volume_facets) {
for (const int tri_id : face) {
if (tri_id < 0 || tri_id >= int(m_object_vertices.size())) {
this->stop("Malformed triangle mesh");
return;
}
min_id = std::min(min_id, tri_id);
max_id = std::max(max_id, tri_id);
}
}
// rebase indices to the current vertices list
for (Vec3i &face : m_volume_facets)
face -= Vec3i(min_id, min_id, min_id);
indexed_triangle_set its { std::move(m_volume_facets), { m_object_vertices.begin() + min_id, m_object_vertices.begin() + max_id + 1 } };
its_compactify_vertices(its);
if (its_volume(its) < 0)
its_flip_triangles(its);
m_volume->set_mesh(std::move(its));
}
// stores the volume matrix taken from the metadata, if present
@ -646,7 +662,6 @@ void AMFParserContext::endElement(const char * /* name */)
m_volume->calculate_convex_hull();
m_volume_facets.clear();
m_object_vertices.clear();
m_volume = nullptr;
break;
}