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Added CrossFieldToAngles and AnglesToCrossField functions

This commit is contained in:
Nico Pietroni 2015-12-24 10:52:33 +00:00
parent e878336450
commit 04095c6f19
1 changed files with 49 additions and 30 deletions
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79
vcg/complex/algorithms/parametrization/tangent_field_operators.h
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@ -809,6 +809,55 @@ public:
return alpha;
}
///transform a cross field into a couple of angles
static void CrossFieldToAngles(const FaceType &f,
ScalarType &alpha1,
ScalarType &alpha2,
int RefEdge=1)
{
CoordType axis0=f.cP1(RefEdge)-f.cP0(RefEdge);
axis0.Normalize();
CoordType axis2=f.cN();
axis2.Normalize();
CoordType axis1=axis2^axis0;
axis1.Normalize();
vcg::Matrix33<ScalarType> Trans=vcg::TransformationMatrix(axis0,axis1,axis2);
//trensform the vector to the reference frame by rotating it
CoordType trasfPD1=Trans*f.cPD1();
CoordType trasfPD2=Trans*f.cPD2();
//then find the angle with respact to axis 0
alpha1=atan2(trasfPD1.Y(),trasfPD1.X());
alpha2=atan2(trasfPD2.Y(),trasfPD2.X());
}
///transform a cross field into a couple of angles
static void AnglesToCrossField(FaceType &f,
const ScalarType &alpha1,
const ScalarType &alpha2,
int RefEdge=1)
{
CoordType axis0=f.cP1(RefEdge)-f.cP0(RefEdge);
axis0.Normalize();
CoordType axis2=f.cN();
axis2.Normalize();
CoordType axis1=axis2^axis0;
axis1.Normalize();
vcg::Matrix33<ScalarType> Trans=vcg::TransformationMatrix(axis0,axis1,axis2);
vcg::Matrix33<ScalarType> InvTrans=Inverse(Trans);
CoordType PD1=CoordType(cos(alpha1),sin(alpha1),0);
CoordType PD2=CoordType(cos(alpha2),sin(alpha2),0);
//then transform and store in the face
f.PD1()=(InvTrans*PD1);
f.PD2()=(InvTrans*PD2);
}
///return the 4 directiona of the cross field in 3D
///given a first direction as input
static void CrossVector(const CoordType &dir0,
@ -1140,34 +1189,6 @@ public:
}
// ///return true if a given vertex is singular,
// ///return also the missmatch
// static bool IsSingularByCross(const VertexType &v,int &missmatch)
// {
// typedef typename VertexType::FaceType FaceType;
// ///check that is on border..
// if (v.IsB())return false;
// std::vector<face::Pos<FaceType> > posVec;
// //SortedFaces(v,faces);
// face::Pos<FaceType> pos(v.cVFp(), v.cVFi());
// vcg::face::VFOrderedStarFF(pos, posVec);
// missmatch=0;
// for (unsigned int i=0;i<posVec.size();i++)
// {
// FaceType *curr_f=posVec[i].F();
// FaceType *next_f=posVec[(i+1)%posVec.size()].F();
// ///find the current missmatch
// missmatch+=MissMatchByCross(*curr_f,*next_f);
// missmatch=missmatch%4;
// }
//// missmatch=missmatch%4;
// return(missmatch!=0);
// }
///return true if a given vertex is singular,
///return also the missmatch
static bool IsSingularByCross(const VertexType &v,int &missmatch)
@ -1188,9 +1209,7 @@ public:
FaceType *next_f=posVec[(i+1)%posVec.size()].F();
//find the current missmatch
//missmatch+=MissMatchByCross(*curr_f,*next_f);
curr_dir=FollowDirection(*curr_f,*next_f,curr_dir);
//missmatch=missmatch%4;
}
missmatch=curr_dir;
return(curr_dir!=0);