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0025413: Line-Shape intersection algorithm became 400 times slower

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Changed the procedure of creating initial samples

Test-case for issue #25413
This commit is contained in:
azv
2014-11-05 17:02:23 +03:00
committed by bugmaster
parent 0797d9d30a
commit 6fb3418ea1
3 changed files with 131 additions and 39 deletions
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66
src/IntCurvesFace/IntCurvesFace_Intersector.cxx
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@@ -91,47 +91,35 @@ IntCurvesFace_Intersector::IntCurvesFace_Intersector(const TopoDS_Face& Face,
U1 = Hsurface->LastUParameter();
V0 = Hsurface->FirstVParameter();
V1 = Hsurface->LastVParameter();
//modified by NIZNHY-PKV Fri Apr 06 07:30:47 2012f
Standard_Boolean bFlag;
//
{
Standard_Real dU, dV, dA, dB, aTresh;
bFlag=Standard_True;
//
aTresh=100.;
dU=U1-U0;
dV=V1-V0;
dA=dU;
dB=dV;
if (dV>dU) {
dA=dV;
dB=dU;
}
//
if (dB < Precision::PConfusion() || dA > dB * aTresh) {
bFlag=!bFlag;
}
}
//
if (bFlag) {
nbsu = myTopolTool->NbSamplesU();
nbsv = myTopolTool->NbSamplesV();
if(nbsu>40) nbsu = 40;
if(nbsv>40) nbsv = 40;
PtrOnPolyhedron = (IntCurveSurface_ThePolyhedronOfHInter *)
new IntCurveSurface_ThePolyhedronOfHInter(Hsurface,nbsu,nbsv,U0,V0,U1,V1);
}
//
/*
Standard_Real aURes = Hsurface->UResolution(1.0);
Standard_Real aVRes = Hsurface->VResolution(1.0);
// Checking correlation between number of samples and length of the face along each axis
const Standard_Real aTresh = 100.0;
const Standard_Integer aMinSamples = 10;
const Standard_Integer aMaxSamples = 40;
const Standard_Integer aMaxSamples2 = aMaxSamples * aMaxSamples;
Standard_Real dU = (U1 - U0) / aURes;
Standard_Real dV = (V1 - V0) / aVRes;
nbsu = myTopolTool->NbSamplesU();
nbsv = myTopolTool->NbSamplesV();
if(nbsu>40) nbsu = 40;
if(nbsv>40) nbsv = 40;
PtrOnPolyhedron = (IntCurveSurface_ThePolyhedronOfHInter *)
new IntCurveSurface_ThePolyhedronOfHInter(Hsurface,nbsu,nbsv,U0,V0,U1,V1);
*/
//modified by NIZNHY-PKV Fri Apr 06 07:30:49 2012t
if (nbsu > aMaxSamples) nbsu = aMaxSamples;
if (nbsv > aMaxSamples) nbsv = aMaxSamples;
if (Max(dU, dV) > Min(dU, dV) * aTresh)
{
nbsu = (Standard_Integer)(Sqrt(dU / dV) * aMaxSamples);
if (nbsu < aMinSamples) nbsu = aMinSamples;
nbsv = aMaxSamples2 / nbsu;
if (nbsv < aMinSamples)
{
nbsv = aMinSamples;
nbsu = aMaxSamples2 / aMinSamples;
}
}
PtrOnPolyhedron = (IntCurveSurface_ThePolyhedronOfHInter *)
new IntCurveSurface_ThePolyhedronOfHInter(Hsurface,nbsu,nbsv,U0,V0,U1,V1);
}
}
//=======================================================================