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Add CheckOrientation 

Reimplement SwapEdge function
This commit is contained in:
Massimiliano Corsini 2005-12-16 10:29:10 +00:00
parent d32db6dd2a
commit 8133c87819
1 changed files with 58 additions and 13 deletions
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63
vcg/simplex/face/topology.h
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@ -24,6 +24,9 @@
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$Log: not supported by cvs2svn $
Revision 1.21 2005/12/01 23:54:59 cignoni
Removed excess ';' from end of template functions, for gcc compiling
Revision 1.20 2005/11/23 13:04:26 ganovelli
changed IsBOrder
@ -238,21 +241,63 @@ void AssertAdj(FaceType & f)
// f = (*f).F(t);
//}
/** This function change the orientation of the face. Inverting the index of two vertex
@param z Index of the edge
*/
template <class SwapFaceType>
void Swap (SwapFaceType &f, const int z )
/**
* Check if the given face is oriented as the one adjacent to the specified edge.
* @param f Face to check the orientation
* @param z Index of the edge
*/
template <class FaceType>
bool CheckOrientation(FaceType &f, int z)
{
if (IsBorder(f, z))
return true;
else
{
FaceType *g = f.FFp(z);
int gi = f.FFi(z);
if (f.V0(z) == g->V1(gi))
return true;
else
return false;
}
}
/**
* This function change the orientation of the face by inverting the index of two vertex.
* @param z Index of the edge
*/
template <class FaceType>
void SwapEdge(FaceType &f, const int z)
{
int i;
SwapFaceType *tmp, *prec;
FaceType *tmp, *prec;
int t, precz;
swap ( f.V((z )%3),f.V((z+1)%3));
// store information to preserve topology
int z0 = z;
int z1 = (z+1)%3;
int z2 = (z+2)%3;
FaceType *g1p = f.FFp(z1);
FaceType *g2p = f.FFp(z2);
int g1i = f.FFi(z1);
int g2i = f.FFi(z2);
if(f.HasFFAdjacency() )
// swap V0(z0) with V1(z0)
swap(f.V0(z0), f.V1(z0));
if(f.HasFFAdjacency())
{
// TODO!!!
// g0 face topology is not affected by the swap
if (g1p != f)
g1p->FFi(g1i) = f.FFi(z2);
if (g2p != f)
g2p->FFi(g2i) = f.FFi(z1);
// finalize swap
swap(f.FFp(z1), f.FFp(z2));
swap(f.FFi(z1), f.FFi(z2));
}
}