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Added (from an idea of Fabio Ganovelli) the possibility of adding face-quality driving quadrics. For each face, three quadric perpendicular to the face plane and passing through the edges are added (just like for borders, but with a much lower weight). In case of very planar surface these quadrics try to keep the original shapes of triangles, preferring small edge collapse. Without this in planar zones collapse order could be random.

This commit is contained in:
Paolo Cignoni 2008-07-15 07:15:18 +00:00
parent 2472215e8d
commit 437d258a22
1 changed files with 5 additions and 2 deletions
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7
vcg/complex/local_optimization/tri_edge_collapse_quadric.h
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@ -150,6 +150,7 @@ public:
bool ComplexCheck;
bool ScaleIndependent;
//***********************
bool QualityQuadric; // During the initialization manage all the edges as border edges adding a set of additional quadrics that are useful mostly for keeping face aspect ratio good.
bool PreserveTopology;
bool PreserveBoundary;
bool MarkComplex;
@ -349,6 +350,7 @@ public:
Params().QualityCheck=true;
Params().QualityThr=.1;
Params().BoundaryWeight=.5;
Params().QualityQuadric=false;
Params().OptimalPlacement=true;
Params().ScaleIndependent=true;
Params().ComplexCheck=false;
@ -549,7 +551,7 @@ static void InitQuadric(TriMeshType &m)
if( (*pf).V(j)->IsW() ) QH::Qd((*pf).V(j)) += q; // Sommo la quadrica ai vertici
for(j=0;j<3;++j)
if( (*pf).IsB(j)) // Bordo!
if( (*pf).IsB(j) || Params().QualityQuadric ) // Bordo!
{
Plane3<ScalarType,false> pb; // Piano di bordo
@ -558,7 +560,8 @@ static void InitQuadric(TriMeshType &m)
// poiche' la pesatura in funzione dell'area e'gia fatta in p.Direction()
// Senza la normalize il bordo e' pesato in funzione della grandezza della mesh (mesh grandi non decimano sul bordo)
pb.SetDirection(p.Direction() ^ ( (*pf).V1(j)->cP() - (*pf).V(j)->cP() ).Normalize());
pb.SetDirection(pb.Direction()* (ScalarType)Params().BoundaryWeight); // amplify border planes
if( (*pf).IsB(j) ) pb.SetDirection(pb.Direction()* (ScalarType)Params().BoundaryWeight); // amplify border planes
else pb.SetDirection(pb.Direction()* (ScalarType)(Params().BoundaryWeight/100.0)); // and consider much less quadric for quality
pb.SetOffset(pb.Direction() * (*pf).V(j)->cP());
q.ByPlane(pb);