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added functions to update local vertices normal

This commit is contained in:
Nico Pietroni 2004-06-15 16:01:26 +00:00
parent 06125c7f29
commit e33cfa2cab
1 changed files with 28 additions and 1 deletions
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29
vcg/complex/tetramesh/update/normal.h
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@ -24,6 +24,9 @@
History
$Log: not supported by cvs2svn $
Revision 1.4 2004/05/26 11:59:09 turini
Changed : Use Of vector In Use Of std::vector.
Revision 1.3 2004/05/26 11:53:17 pietroni
modified face declaration
@ -45,6 +48,7 @@ Written some documentation and added to the trimes doxygen module
#include<vcg\simplex\face\face.h>
#include<vcg\complex\trimesh\base.h>
#include<vcg\complex\trimesh\update\normal.h>
#include<vcg\simplex\tetrahedron\pos.h>
#include<vector>
namespace vcg {
@ -80,6 +84,29 @@ static void PerTetraFace(TetraMeshType &m)
if( !(*t).IsD() ) (*t).ComputeNormal();
}
/// Calculates the vertex normal of a vertex.
static void PerVertex(VertexType *v)
{
if( !VertexType::HasNormal()) return;
VTIterator<TetraType> VTi=VTIterator<TetraType>(v->VTb(),v->VTi());
VertexType::NormalType Norm=VertexType::NormalType(0,0,0);
int iter=0;
while (!VTi.End())
{
//take the tree faces on the vertex's tetrahedron
int f0=Tetra::FofV(VTi.Vi(),0);
int f1=Tetra::FofV(VTi.Vi(),1);
int f2=Tetra::FofV(VTi.Vi(),2);
iter++;
if (VTi.Vt()->IsBorderF(f0))
Norm+=VTi.Vt()->N(f0);
VTi++;
}
Norm/=iter;
v->N()=Norm.Normalize();
}
/// Calculates the vertex normal. Without exploiting or touching face normals
/// The normal of a vertex v is the weigthed average of the normals of the faces incident on v.
@ -90,7 +117,7 @@ static void PerVertex(TetraMeshType &m)
_ClearNormal(m);
TriMeshTemp tri_mesh=TriMeshTemp();
TriConverter <TetraMeshType,TriMeshTemp>tric=TriConverter<TetraMeshType,TriMeshTemp>();
tric.Convert(m,tri_mesh);
tric.Convert(m.tetra,tri_mesh);
vcg::tri::UpdateNormals<TriMeshTemp> UNT=vcg::tri::UpdateNormals<TriMeshTemp>();
UNT.PerVertexNormalized(tri_mesh);
}