Relintai/mesh_utils
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Hoping that floodfillFaces will now do what I need.

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Relintai 2021-09-28 18:21:11 +02:00
parent 9403f04cee
commit 63fe407daa
1 changed files with 38 additions and 0 deletions
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38
xatlas/xatlas.cpp
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@ -4597,6 +4597,44 @@ private:
};
void floodfillFaces(Chart &chart) {
const bool isFaceAreaNegative = m_data.faceUvAreas[m_chartFaces[chart.firstFace]] < 0.0f;
for (;;) {
bool newFaceAdded = false;
const uint32_t faceCount = chart.faceCount;
for (uint32_t f = 0; f < faceCount; f++) {
const uint32_t sourceFace = m_chartFaces[chart.firstFace + f];
for (Mesh::FaceEdgeIterator edgeIt(m_data.mesh, sourceFace); !edgeIt.isDone(); edgeIt.advance()) {
const uint32_t face = edgeIt.oppositeFace();
if (face == UINT32_MAX)
continue; // Boundary edge.
if (m_data.isFaceInChart.get(face))
continue; // Already assigned to a chart.
if (isZero(m_data.faceUvAreas[face], kAreaEpsilon))
continue; // Face must have valid UVs.
if ((m_data.faceUvAreas[face] < 0.0f) != isFaceAreaNegative)
continue; // Face winding is opposite of the first chart face.
//const Vector2 &uv0 = m_data.mesh->texcoord(edgeIt.vertex0());
//const Vector2 &uv1 = m_data.mesh->texcoord(edgeIt.vertex1());
//const Vector2 &ouv0 = m_data.mesh->texcoord(m_data.mesh->vertexAt(meshEdgeIndex0(edgeIt.oppositeEdge())));
//const Vector2 &ouv1 = m_data.mesh->texcoord(m_data.mesh->vertexAt(meshEdgeIndex1(edgeIt.oppositeEdge())));
//if (!equal(uv0, ouv1, m_data.mesh->epsilon()) || !equal(uv1, ouv0, m_data.mesh->epsilon()))
// continue; // UVs must match exactly.
m_chartFaces.push_back(face);
chart.faceCount++;
m_data.isFaceInChart.set(face);
newFaceAdded = true;
}
}
if (!newFaceAdded)
break;
}
}
void floodfillFacesWithUV(Chart &chart) {
const bool isFaceAreaNegative = m_data.faceUvAreas[m_chartFaces[chart.firstFace]] < 0.0f;
for (;;) {
bool newFaceAdded = false;