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0023794: Too small precision leads to instability

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tol2 (10^-36) was changed to dPreci (10^-18)
test case was changed by adding TODO
This commit is contained in:
ika
2013-03-07 13:21:34 +04:00
parent 6942f04af5
commit 9b308cd3f6
2 changed files with 2 additions and 2 deletions
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3
src/ShapeConstruct/ShapeConstruct_ProjectCurveOnSurface.cxx
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@@ -993,7 +993,6 @@ Standard_Boolean ShapeConstruct_ProjectCurveOnSurface::PerformAdvanced (Handle(G
Standard_Real dist = pnt2d(1).SquareDistance(pnt2d(NbPnt2d));
Standard_Real dPreci = Precision::PConfusion()*Precision::PConfusion();
if(dist >= dPreci) {
Standard_Real tol2 = dPreci*dPreci;
gp_Vec2d avec (pnt2d(1),pnt2d(NbPnt2d));
gp_Dir2d adir (avec);
gp_Lin2d alin (pnt2d(1),adir);
@@ -1002,7 +1001,7 @@ Standard_Boolean ShapeConstruct_ProjectCurveOnSurface::PerformAdvanced (Handle(G
Standard_Real dist2 = pnt2d(1).SquareDistance(pnt2d(i));
Standard_Real step = pnt2d(1).Distance(pnt2d(NbPnt2d))/(NbPnt2d-1);
Standard_Real ddist = Abs(pnt2d(1).Distance(pnt2d(i))-step*(i-1));
if( devia>tol2 || (dist2-dist)>dPreci || ddist>1.e-3*step ) {
if( devia>dPreci || (dist2-dist)>dPreci || ddist>1.e-3*step ) {
IsLine = Standard_False;
i = NbPnt2d;
}