OpenCascade/occt
1
0
Fork 0
mirror of https://git.dev.opencascade.org/repos/occt.git synced 2025-08-09 13:22:24 +03:00
Code Activity

0022598: Approximation of p-curve by 2D line

Browse Source 
Check whether p-curve being projected can be approximated by straight line is made before full-scale projection, to improve performance.
If straight, pcurve is created as Line only if this will lead to the same range parameterization as 3d curve, otherwise BSpline of degree 1 is created.
Re-approximation of line pcurves by bsplines removed from ShapeFix_Edge.

Test case updating to new behavior.

Added "static" keyword to the  fixPeriodictyTroubles() function.

Update of test-cases according new behavior
This commit is contained in:
aml
2015-02-05 17:57:20 +03:00
committed by bugmaster
parent 9ccea0c628
commit 15b54261a3
275 changed files with 696 additions and 543 deletions
Download Patch File Download Diff File Expand all files Collapse all files

56
src/ShapeAnalysis/ShapeAnalysis_Surface.cxx
View File

@@ -875,21 +875,53 @@ gp_Pnt2d ShapeAnalysis_Surface::NextValueOfUV(const gp_Pnt2d &p2dPrev,
case GeomAbs_SurfaceOfRevolution :
case GeomAbs_OffsetSurface :
// if ( ! mySurf->Continuity() == GeomAbs_C0 ) //: S4030: fix on BUC40132 8355 & PRO7978 1987: SI because of bad data
{
if (surftype == GeomAbs_BSplineSurface)
{
Handle(Geom_BSplineSurface) aBSpline = SurfAdapt.BSpline();
//Check near to knot position ~ near to C0 points on U isoline.
if ( SurfAdapt.UContinuity() == GeomAbs_C0 )
{
Standard_Integer aMinIndex = aBSpline->FirstUKnotIndex();
Standard_Integer aMaxIndex = aBSpline->LastUKnotIndex();
for (Standard_Integer anIdx = aMinIndex; anIdx <= aMaxIndex; ++anIdx)
{
Standard_Real aKnot = aBSpline->UKnot(anIdx);
if (Abs (aKnot - p2dPrev.X()) < Precision::Confusion())
return ValueOfUV ( P3D, preci );
}
}
//Check near to knot position ~ near to C0 points on U isoline.
if ( SurfAdapt.VContinuity() == GeomAbs_C0 )
{
Standard_Integer aMinIndex = aBSpline->FirstVKnotIndex();
Standard_Integer aMaxIndex = aBSpline->LastVKnotIndex();
for (Standard_Integer anIdx = aMinIndex; anIdx <= aMaxIndex; ++anIdx)
{
Standard_Real aKnot = aBSpline->VKnot(anIdx);
if (Abs (aKnot - p2dPrev.Y()) < Precision::Confusion())
return ValueOfUV ( P3D, preci );
}
}
}
gp_Pnt2d sol;
Standard_Boolean res = SurfaceNewton(p2dPrev,P3D,preci,sol);
if ( res ) {
Standard_Real gap = P3D.Distance ( Value(sol) );
if ( res ==2 || //:q6 abv 19 Mar 99: protect against strange attractors
(maxpreci > 0. && gap - maxpreci > Precision::Confusion()) ) { //:q1: check with maxpreci
Standard_Real U = sol.X(), V = sol.Y();
myGap = UVFromIso ( P3D, preci, U, V );
// gp_Pnt2d p = ValueOfUV ( P3D, preci );
if ( gap >= myGap ) return gp_Pnt2d ( U, V );
}
myGap = gap;
return sol;
if ( res )
{
Standard_Real gap = P3D.Distance ( Value(sol) );
if ( res == 2 || //:q6 abv 19 Mar 99: protect against strange attractors
( maxpreci > 0. && gap - maxpreci > Precision::Confusion()) )
{ //:q1: check with maxpreci
Standard_Real U = sol.X(), V = sol.Y();
myGap = UVFromIso ( P3D, preci, U, V );
// gp_Pnt2d p = ValueOfUV ( P3D, preci );
if ( gap >= myGap ) return gp_Pnt2d ( U, V );
}
myGap = gap;
return sol;
}
}
break;