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improved the robustness of rebuildTopology()

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Wenzel Jakob 2013-12-22 15:42:26 +01:00
parent e5e4e56512
commit f3d725085c
1 changed files with 16 additions and 2 deletions
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18
src/librender/trimesh.cpp
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@ -448,7 +448,7 @@ struct vertex_key_order : public
else if (v1.uv.x > v2.uv.x) return 1;
if (v1.uv.y < v2.uv.y) return -1;
else if (v1.uv.y > v2.uv.y) return 1;
for (int i=0; i<SPECTRUM_SAMPLES; ++i) {
for (int i=0; i<Color3::dim; ++i) {
if (v1.col[i] < v2.col[i]) return -1;
else if (v1.col[i] > v2.col[i]) return 1;
}
@ -474,6 +474,7 @@ void TriMesh::rebuildTopology(Float maxAngle) {
typedef std::multimap<Vertex, TopoData, vertex_key_order> MMap;
typedef std::pair<Vertex, TopoData> MPair;
const Float dpThresh = std::cos(degToRad(maxAngle));
size_t degenerateTriangles = 0;
if (m_normals) {
delete[] m_normals;
@ -518,7 +519,17 @@ void TriMesh::rebuildTopology(Float maxAngle) {
Point v0 = m_positions[tri.idx[0]];
Point v1 = m_positions[tri.idx[1]];
Point v2 = m_positions[tri.idx[2]];
faceNormals[i] = Normal(normalize(cross(v1 - v0, v2 - v0)));
Normal n = cross(v1 - v0, v2 - v0);
Float l = n.length();
if (l > RCPOVERFLOW_FLT) {
n /= l;
} else {
n = Normal(0.0f); /* Degenerate triangle */
degenerateTriangles++;
}
faceNormals[i] = Normal(n);
for (int j=0; j<3; ++j)
newTriangles[i].idx[j] = 0xFFFFFFFFU;
}
@ -590,6 +601,9 @@ void TriMesh::rebuildTopology(Float maxAngle) {
m_vertexCount = newPositions.size();
if (degenerateTriangles > 0)
Log(EWarn, "Mesh contains " SIZE_T_FMT " degenerate triangles!", degenerateTriangles);
Log(EInfo, "Done after %i ms (mesh now has " SIZE_T_FMT " vertices)",
timer->getMilliseconds(), m_vertexCount);