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+ properly handle case of degenerated bounding box when creating mesh grid

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This commit is contained in:
wmayer 2015-11-14 14:08:01 +01:00
parent 821cd696c5
commit 7848d08121
1 changed files with 25 additions and 0 deletions
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25
src/Mod/Mesh/App/Core/Grid.cpp
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@ -267,6 +267,31 @@ void MeshGrid::CalculateGridLength (unsigned long ulCtGrid, unsigned long ulMaxG
Base::BoundBox3f clBBMeshEnlarged = _pclMesh->GetBoundBox();
float fVolElem;
// Stelle sicher, dass die Bounding box ein Volumen > 0 besitzt
float fLenX = clBBMeshEnlarged.LengthX();
float fLenY = clBBMeshEnlarged.LengthY();
float fLenZ = clBBMeshEnlarged.LengthZ();
float fMax = 0.005 * std::max<float>(std::max<float>(fLenX, fLenY), fLenZ);
// Falls Bounding box zu einem Punkt degeneriert ist
if (fMax == 0) {
_ulCtGridsX = 1;
_ulCtGridsY = 1;
_ulCtGridsZ = 1;
return;
}
if (fLenX == 0) {
clBBMeshEnlarged.MinX -= fMax;
clBBMeshEnlarged.MaxX += fMax;
}
if (fLenY == 0) {
clBBMeshEnlarged.MinY -= fMax;
clBBMeshEnlarged.MaxY += fMax;
}
if (fLenZ == 0) {
clBBMeshEnlarged.MinZ -= fMax;
clBBMeshEnlarged.MaxZ += fMax;
}
if (_ulCtElements > (ulMaxGrids * ulCtGrid))
fVolElem = (clBBMeshEnlarged.LengthX() * clBBMeshEnlarged.LengthY() * clBBMeshEnlarged.LengthZ()) / float(ulMaxGrids * ulCtGrid);
else