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Added evaluation of Koenderink's Shape Index and Curvedness from curvature

This commit is contained in:
Paolo Cignoni 2017-01-29 18:20:00 +01:00
parent c858faab65
commit bdd25079ac
1 changed files with 61 additions and 0 deletions
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61
vcg/complex/algorithms/update/quality.h
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@ -226,6 +226,67 @@ static void VertexFromMeanCurvatureDir(MeshType &m)
for(VertexIterator vi=m.vert.begin();vi!=m.vert.end();++vi) if(!(*vi).IsD()) for(VertexIterator vi=m.vert.begin();vi!=m.vert.end();++vi) if(!(*vi).IsD())
(*vi).Q() = ((*vi).K1()+(*vi).K2())/2.0f; (*vi).Q() = ((*vi).K1()+(*vi).K2())/2.0f;
} }
static void VertexFromMinCurvatureDir(MeshType &m)
{
tri::RequirePerVertexQuality(m);
tri::RequirePerVertexCurvatureDir(m);
for(VertexIterator vi=m.vert.begin();vi!=m.vert.end();++vi) if(!(*vi).IsD())
(*vi).Q() = (*vi).K1();
}
static void VertexFromMaxCurvatureDir(MeshType &m)
{
tri::RequirePerVertexQuality(m);
tri::RequirePerVertexCurvatureDir(m);
for(VertexIterator vi=m.vert.begin();vi!=m.vert.end();++vi) if(!(*vi).IsD())
(*vi).Q() = (*vi).K2();
}
/**
* @brief VertexFromShapeIndexCurvatureDir
* Compute from the current Curvature Direction the Shape Index S as defined by [Koenderink 1992]
* and store it in the per-vertex Quality.
* S = 2/pi atan(k1+k2/k1-k2)
*
* J. Koenderink and A. van Doorn.
* Surface shape and curvature scales.
* Image and vision computing, 10(8):557–565, 1992.
*/
static void VertexFromShapeIndexCurvatureDir(MeshType &m)
{
tri::RequirePerVertexQuality(m);
tri::RequirePerVertexCurvatureDir(m);
for(VertexIterator vi=m.vert.begin();vi!=m.vert.end();++vi) if(!(*vi).IsD())
{
ScalarType k1=(*vi).K1();
ScalarType k2=(*vi).K2();
if(k1<k2) std::swap(k1,k2);
(*vi).Q() = (2.0/M_PI)*atan2(k1+k2,k1-k2);
}
}
/**
* @brief VertexFromCurvednessCurvatureDir
* Compute from the current Curvature Direction the Curvedness as defined by [Koenderink 1992]
* and store it in the per-vertex Quality.
* C = Sqrt((k1*k1+k2*k2)/2.0)
*
* J. Koenderink and A. van Doorn.
* Surface shape and curvature scales.
* Image and vision computing, 10(8):557–565, 1992.
*/
static void VertexFromCurvednessCurvatureDir(MeshType &m)
{
tri::RequirePerVertexQuality(m);
tri::RequirePerVertexCurvatureDir(m);
for(VertexIterator vi=m.vert.begin();vi!=m.vert.end();++vi) if(!(*vi).IsD())
{
const ScalarType k1=(*vi).K1();
const ScalarType k2=(*vi).K2();
(*vi).Q() = math::Sqrt((k1*k1+k2*k2)/2.0);
}
}
/* /*
* Absolute Curvature * Absolute Curvature