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read meshes based on halfedge information

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This commit is contained in:
Max Lyon
2018-08-08 10:59:51 +02:00
parent 3583c77f3d
commit 76607e4ec6
1 changed files with 87 additions and 23 deletions
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66
src/OpenMesh/Core/IO/reader/OMReader.cc
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@@ -351,6 +351,19 @@ bool _OMReader_::read_binary_vertex_chunk(std::istream &_is, BaseImporter &_bi,
break;
case Chunk::Type_Topology:
{
for (; vidx < header_.n_vertices_; ++vidx)
{
int halfedge_id;
bytes_ += restore( _is, halfedge_id, OMFormat::Chunk::Integer_Size(chunk_header_.bits_), _swap );
_bi.set_halfedge(VertexHandle(static_cast<int>(vidx)), HalfedgeHandle(halfedge_id));
}
}
break;
default: // skip unknown chunks
{
omerr() << "Unknown chunk type ignored!\n";
@@ -378,7 +391,11 @@ bool _OMReader_::read_binary_face_chunk(std::istream &_is, BaseImporter &_bi, Op
OpenMesh::Vec3uc v3uc; // rgb
switch (chunk_header_.type_) {
case Chunk::Type_Topology: {
case Chunk::Type_Topology:
{
if (header_.version_ < OMFormat::mk_version(2,0))
{
// add faces based on vertex indices
BaseImporter::VHandles vhandles;
size_t nV = 0;
size_t vidx = 0;
@@ -405,6 +422,18 @@ bool _OMReader_::read_binary_face_chunk(std::istream &_is, BaseImporter &_bi, Op
_bi.add_face(vhandles);
}
}
else
{
// add faces by simple setting an incident face
for (; fidx < header_.n_faces_; ++fidx)
{
int halfedge_id;
bytes_ += restore( _is, halfedge_id, OMFormat::Chunk::Integer_Size(chunk_header_.bits_), _swap );
_bi.add_face(HalfedgeHandle(halfedge_id));
}
}
}
break;
@@ -495,6 +524,41 @@ bool _OMReader_::read_binary_halfedge_chunk(std::istream &_is, BaseImporter &_bi
bytes_ += restore_binary_custom_data(_is, _bi.kernel()->_get_hprop(property_name_), 2 * header_.n_edges_, _swap);
break;
case Chunk::Type_Topology:
{
std::vector<HalfedgeHandle> next_halfedges;
for (size_t e_idx = 0; e_idx < header_.n_edges_; ++e_idx)
{
int next_id_0;
int to_vertex_id_0;
int face_id_0;
bytes_ += restore( _is, next_id_0, OMFormat::Chunk::Integer_Size(chunk_header_.bits_), _swap );
bytes_ += restore( _is, to_vertex_id_0, OMFormat::Chunk::Integer_Size(chunk_header_.bits_), _swap );
bytes_ += restore( _is, face_id_0, OMFormat::Chunk::Integer_Size(chunk_header_.bits_), _swap );
int next_id_1;
int to_vertex_id_1;
int face_id_1;
bytes_ += restore( _is, next_id_1, OMFormat::Chunk::Integer_Size(chunk_header_.bits_), _swap );
bytes_ += restore( _is, to_vertex_id_1, OMFormat::Chunk::Integer_Size(chunk_header_.bits_), _swap );
bytes_ += restore( _is, face_id_1, OMFormat::Chunk::Integer_Size(chunk_header_.bits_), _swap );
auto heh0 = _bi.add_edge(VertexHandle(to_vertex_id_1), VertexHandle(to_vertex_id_0));
auto heh1 = HalfedgeHandle(heh0.idx() + 1);
next_halfedges.push_back(HalfedgeHandle(next_id_0));
next_halfedges.push_back(HalfedgeHandle(next_id_1));
_bi.set_face(heh0, FaceHandle(face_id_0));
_bi.set_face(heh1, FaceHandle(face_id_1));
}
for (size_t i = 0; i < next_halfedges.size(); ++i)
_bi.set_next(HalfedgeHandle(static_cast<int>(i)), next_halfedges[i]);
}
break;
default:
// skip unknown chunk
omerr() << "Unknown chunk type ignored!\n";