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Mesh analyzing algorithms

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This commit is contained in:
wmayer
2013-02-17 08:28:01 +01:00
parent 8079e6452b
commit 0abef4d4e3
13 changed files with 441 additions and 55 deletions
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72
src/Mod/Mesh/App/Core/Evaluation.cpp
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@@ -411,27 +411,26 @@ unsigned long MeshEvalTopology::CountManifolds() const
bool MeshFixTopology::Fixup ()
{
std::vector<unsigned long> indices;
#if 0
MeshEvalTopology eval(_rclMesh);
if (!eval.Evaluate()) {
eval.GetFacetManifolds(indices);
eval.GetFacetManifolds(deletedFaces);
// remove duplicates
std::sort(indices.begin(), indices.end());
indices.erase(std::unique(indices.begin(), indices.end()), indices.end());
std::sort(deletedFaces.begin(), deletedFaces.end());
deletedFaces.erase(std::unique(deletedFaces.begin(), deletedFaces.end()), deletedFaces.end());
_rclMesh.DeleteFacets(indices);
_rclMesh.DeleteFacets(deletedFaces);
}
#else
const MeshFacetArray& rFaces = _rclMesh.GetFacets();
indices.reserve(3 * nonManifoldList.size()); // allocate some memory
deletedFaces.reserve(3 * nonManifoldList.size()); // allocate some memory
std::list<std::vector<unsigned long> >::const_iterator it;
for (it = nonManifoldList.begin(); it != nonManifoldList.end(); ++it) {
std::vector<unsigned long> non_mf;
non_mf.reserve(it->size());
for (std::vector<unsigned long>::const_iterator jt = it->begin(); jt != it->end(); ++jt) {
// fscet is only connected with one edge and there causes a non-manifold
// facet is only connected with one edge and there causes a non-manifold
unsigned short numOpenEdges = rFaces[*jt].CountOpenEdges();
if (numOpenEdges == 2)
non_mf.push_back(*jt);
@@ -441,17 +440,17 @@ bool MeshFixTopology::Fixup ()
// are we able to repair the non-manifold edge by not removing all facets?
if (it->size() - non_mf.size() == 2)
indices.insert(indices.end(), non_mf.begin(), non_mf.end());
deletedFaces.insert(deletedFaces.end(), non_mf.begin(), non_mf.end());
else
indices.insert(indices.end(), it->begin(), it->end());
deletedFaces.insert(deletedFaces.end(), it->begin(), it->end());
}
if (!indices.empty()) {
if (!deletedFaces.empty()) {
// remove duplicates
std::sort(indices.begin(), indices.end());
indices.erase(std::unique(indices.begin(), indices.end()), indices.end());
std::sort(deletedFaces.begin(), deletedFaces.end());
deletedFaces.erase(std::unique(deletedFaces.begin(), deletedFaces.end()), deletedFaces.end());
_rclMesh.DeleteFacets(indices);
_rclMesh.DeleteFacets(deletedFaces);
_rclMesh.RebuildNeighbours();
}
#endif
@@ -461,6 +460,53 @@ bool MeshFixTopology::Fixup ()
// ---------------------------------------------------------
bool MeshEvalPointManifolds::Evaluate ()
{
this->nonManifoldPoints.clear();
this->facetsOfNonManifoldPoints.clear();
MeshCore::MeshRefPointToPoints vv_it(_rclMesh);
MeshCore::MeshRefPointToFacets vf_it(_rclMesh);
unsigned long ctPoints = _rclMesh.CountPoints();
for (unsigned long index=0; index < ctPoints; index++) {
// get the local neighbourhood of the point
const std::set<unsigned long>& nf = vf_it[index];
const std::set<unsigned long>& np = vv_it[index];
std::set<unsigned long>::size_type sp, sf;
sp = np.size();
sf = nf.size();
// for an inner point the number of adjacent points is equal to the number of shared faces
// for a boundary point the number of adjacent points is higher by one than the number of shared faces
// for a non-manifold point the number of adjacent points is higher by more than one than the number of shared faces
if (sp > sf + 1) {
nonManifoldPoints.push_back(index);
std::vector<unsigned long> faces;
faces.insert(faces.end(), nf.begin(), nf.end());
this->facetsOfNonManifoldPoints.push_back(faces);
}
}
return this->nonManifoldPoints.empty();
}
void MeshEvalPointManifolds::GetFacetIndices (std::vector<unsigned long> &facets) const
{
std::list<std::vector<unsigned long> >::const_iterator it;
for (it = facetsOfNonManifoldPoints.begin(); it != facetsOfNonManifoldPoints.end(); ++it) {
facets.insert(facets.end(), it->begin(), it->end());
}
if (!facets.empty()) {
// remove duplicates
std::sort(facets.begin(), facets.end());
facets.erase(std::unique(facets.begin(), facets.end()), facets.end());
}
}
// ---------------------------------------------------------
bool MeshEvalSingleFacet::Evaluate ()
{
// get all non-manifolds