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added functionalities to evaluate distortion wrt a cross field

This commit is contained in:
Nico Pietroni 2016-02-08 13:42:29 +00:00
parent 46f8492f05
commit 83f0deca4d
1 changed files with 309 additions and 263 deletions
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64
vcg/complex/algorithms/parametrization/distortion.h
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@ -24,6 +24,7 @@
#ifndef VCG_PARAM_DISTORTION #ifndef VCG_PARAM_DISTORTION
#define VCG_PARAM_DISTORTION #define VCG_PARAM_DISTORTION
#include <vcg/complex/algorithms/parametrization/uv_utils.h> #include <vcg/complex/algorithms/parametrization/uv_utils.h>
#include <vcg/complex/algorithms/parametrization/tangent_field_operators.h>
namespace vcg { namespace vcg {
namespace tri{ namespace tri{
@ -151,7 +152,7 @@ namespace vcg {
public: public:
enum DistType{AreaDist,EdgeDist,AngleDist}; enum DistType{AreaDist,EdgeDist,AngleDist,CrossDist};
///return the absolute difference between angle in 3D space and texture space ///return the absolute difference between angle in 3D space and texture space
///Actually the difference in cos space ///Actually the difference in cos space
@ -168,7 +169,7 @@ namespace vcg {
{ {
ScalarType Angle_3D=AngleRad3D(f,e); ScalarType Angle_3D=AngleRad3D(f,e);
ScalarType Angle_UV=AngleRadUV(f,e); ScalarType Angle_UV=AngleRadUV(f,e);
ScalarType diff=fabs(Angle_3D-Angle_UV);///Angle_3D; ScalarType diff=fabs(Angle_3D-Angle_UV)/Angle_3D;///Angle_3D;
return diff; return diff;
} }
@ -176,9 +177,9 @@ namespace vcg {
///in absolute value ///in absolute value
static ScalarType AngleDistortion(const FaceType *f) static ScalarType AngleDistortion(const FaceType *f)
{ {
return AngleRadDistortion(f,0) + return (AngleRadDistortion(f,0) +
AngleRadDistortion(f,1) + AngleRadDistortion(f,1) +
AngleRadDistortion(f,2); AngleRadDistortion(f,2))/3.0;
} }
///return the global scaling factors from 3D to UV ///return the global scaling factors from 3D to UV
@ -270,24 +271,69 @@ namespace vcg {
return UDdist; return UDdist;
} }
static void SetQasCrossDirDistortion(MeshType &m)
{
//first save the old UV dir
std::vector<CoordType> Dir1,Dir2;
for (size_t i=0;i<m.face.size();i++)
{
Dir1.push_back(m.face[i].PD1());
Dir2.push_back(m.face[i].PD2());
}
vcg::tri::CrossField<MeshType>::InitDirFromWEdgeUV(m);
//then compute angle deficit
for (size_t i=0;i<m.face.size();i++)
{
CoordType transfPD1=vcg::tri::CrossField<MeshType>::K_PI(Dir1[i],
m.face[i].PD1(),
m.face[i].N());
transfPD1.Normalize();
ScalarType AngleDeficit=vcg::Angle(transfPD1,m.face[i].PD1());
AngleDeficit=math::ToDeg(AngleDeficit);
if ((AngleDeficit>45)||(AngleDeficit<0))
{
std::cout<<"Warnign A Deficit "<<AngleDeficit<<std::endl;
}
// assert(AngleDeficit<45);
// assert(AngleDeficit>=0);
m.face[i].Q()=(AngleDeficit)/(ScalarType)45;
}
//finally restore the original directions
for (size_t i=0;i<m.face.size();i++)
{
m.face[i].PD1()=Dir1[i];
m.face[i].PD2()=Dir2[i];
}
}
static void SetQasDistorsion(MeshType &m, static void SetQasDistorsion(MeshType &m,
DistType DType=AreaDist) DistType DType=AreaDist)
{ {
if (DType==CrossDist)
{
SetQasCrossDirDistortion(m);
vcg::tri::UpdateQuality<MeshType>::VertexFromFace(m,true);
return;
}
ScalarType edge_scale,area_scale; ScalarType edge_scale,area_scale;
MeshScalingFactor(m,area_scale,edge_scale); MeshScalingFactor(m,area_scale,edge_scale);
for (int i=0;i<m.face.size();i++) for (int i=0;i<m.face.size();i++)
{ {
if (m.face[i].IsD())continue; if (m.face[i].IsD())continue;
if (DType==AreaDist) if (DType==AreaDist)
m.face[i].Q()=1-AreaDistortion(&m.face[i],area_scale); m.face[i].Q()=AreaDistortion(&m.face[i],area_scale);
else else
if (DType==AngleDist) if (DType==AngleDist)
m.face[i].Q()=1-AngleDistortion(&m.face[i]); m.face[i].Q()=AngleDistortion(&m.face[i]);
else else
m.face[i].Q()=3-EdgeDistortion(&m.face[i],0,edge_scale)- m.face[i].Q()=(EdgeDistortion(&m.face[i],0,edge_scale)+
EdgeDistortion(&m.face[i],1,edge_scale)- EdgeDistortion(&m.face[i],1,edge_scale)+
EdgeDistortion(&m.face[i],2,edge_scale); EdgeDistortion(&m.face[i],2,edge_scale))/3.0;
} }
vcg::tri::UpdateQuality<MeshType>::VertexFromFace(m,true);
} }
}; };
} }