schuellc
52e7231cee
Modified xml serialization Updated Embree ray intersection checks Updateded LIM Various bug fixes
76 lines
1.8 KiB
C++
76 lines
1.8 KiB
C++
// Copyright 2013 - Christian Schüller 2013, schuellc@inf.ethz.ch
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// Interactive Geometry Lab - ETH Zurich
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#include "TetrahedronMesh.h"
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TetrahedronMesh::TetrahedronMesh()
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{
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InitalVertices = NULL;
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DeformedVertices = NULL;
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BorderVertices = NULL;
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ConstraintMatrix = NULL;
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ConstraintTargets= NULL;
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Radius = 0;
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Center = Eigen::Vector3f(0,0,0);
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}
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TetrahedronMesh::~TetrahedronMesh()
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{
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}
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void TetrahedronMesh::InitMesh()
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{
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UpdateMesh();
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// Find min tet volume
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double minVol = std::numeric_limits<double>::max();
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for(int t=0;t<Tetrahedra->rows();t++)
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{
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Eigen::Vector3d A = InitalVertices->row(Tetrahedra->coeff(t,0)).cast<double>();
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Eigen::Vector3d B = InitalVertices->row(Tetrahedra->coeff(t,1)).cast<double>();
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Eigen::Vector3d C = InitalVertices->row(Tetrahedra->coeff(t,2)).cast<double>();
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Eigen::Vector3d D = InitalVertices->row(Tetrahedra->coeff(t,3)).cast<double>();
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Eigen::Vector3d a = A-D;
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Eigen::Vector3d b = B-D;
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Eigen::Vector3d c = C-D;
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double vol = a.dot(c.cross(b));
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if(vol <= 0)
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std::cerr << "element " << t << " has zero or negative volume!\n";
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if(vol < minVol)
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minVol = vol;
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}
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EPS1 = 10e-5;
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EPS3 = minVol*EPS1;
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}
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void TetrahedronMesh::UpdateMesh()
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{
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Eigen::Vector3f minVal = DeformedVertices->row(0).cast<float>();
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Eigen::Vector3f maxVal = DeformedVertices->row(0).cast<float>();
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for(int i=0;i<DeformedVertices->rows();i++)
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{
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Eigen::Vector3f v = DeformedVertices->row(i).cast<float>();
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for(int i=0;i<3;i++)
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{
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if(v(i) < minVal(i))
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minVal(i) = v(i);
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if(v(i) > maxVal(i))
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maxVal(i) = v(i);
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}
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}
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BoxCornerMin = minVal;
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BoxCornerMax = maxVal;
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BoxSize = maxVal -minVal;
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Radius = BoxSize.norm()*0.5f;
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Center = ((maxVal+minVal)*0.5f).cast<float>();
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NodeSize = Radius*0.02;
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} |