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added function to compute the FaceProjection flags used in point-face distance

This commit is contained in:
Paolo Cignoni 2008-06-13 05:44:35 +00:00
parent 67ce430991
commit 2ff77479af
1 changed files with 21 additions and 1 deletions
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22
vcg/complex/trimesh/update/flag.h
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@ -110,6 +110,7 @@ class UpdateFlags
public:
typedef UpdateMeshType MeshType;
typedef vcg::face::Pos<typename UpdateMeshType::FaceType> PosType;
typedef typename MeshType::ScalarType ScalarType;
typedef typename MeshType::VertexType VertexType;
typedef typename MeshType::VertexPointer VertexPointer;
typedef typename MeshType::VertexIterator VertexIterator;
@ -292,7 +293,26 @@ static void VertexBorderFromNone(MeshType &m)
}
}
// versione minimale che non calcola i complex flag.
/// This function fill the flags with the info on what is the best projection direction
/// for a given face. Used by the point-face distance function when do not exploiting pre-computed
/// per-face data (the so called edge component)
static void FaceProjection(MeshType &m)
{
FaceIterator fi;
for(fi=m.face.begin();fi!=m.face.end();++fi) // Lo riempio con i dati delle facce
if( ! (*fi).IsD() )
{
ScalarType nx = math::Abs((*fi).cN()[0]);
ScalarType ny = math::Abs((*fi).cN()[1]);
ScalarType nz = math::Abs((*fi).cN()[2]);
if(nx>ny && nx>nz) { (*fi).Flags() |= FaceType::NORMX; }
else if(ny>nz) { (*fi).Flags() |= FaceType::NORMY; }
else { (*fi).Flags() |= FaceType::NORMZ; }
}
}
/// Computes per-face border flags without requiring any kind of topology
/// It has a O(fn log fn) complexity.
static void FaceBorderFromNone(MeshType &m)
{
assert(HasPerFaceFlags(m));