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0023453: Infinite loop on cut operation

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In IntTools_FClass2d.cxx, do {} while {} cycle is replaced by for () cycle to avoid possible infinite loop.
Check for degeneration is made with Precision::Confusion() precision instead of comparison with 0.
Correction of misprint
This commit is contained in:
abv
2012-10-05 13:58:17 +04:00
parent 08cd2f6bb1
commit 2478cd9d9f
1 changed files with 18 additions and 19 deletions
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37
src/IntTools/IntTools_FClass2d.cxx
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@@ -194,25 +194,24 @@ IntTools_FClass2d::IntTools_FClass2d()
//
//-- Verification of cases when forgotten to code degenereted
if(!degenerated) {
Standard_Real aR2;
gp_Pnt P3da, P3db;
//
C3d.Initialize(edge,Face);
du=(plbid-pfbid)*0.1;
u=pfbid+du;
P3da=C3d.Value(u);
degenerated=Standard_True;
u+=du;
do {
P3db=C3d.Value(u);
aR2=P3da.SquareDistance(P3db);
if(aR2>0.) {
degenerated=Standard_False;
break;
}
u+=du;
}
while(u<plbid);
// check that whole curve is located in vicinity of its middle point
// (within sphere of Precision::Confusion() diameter)
C3d.Initialize (edge, Face);
gp_Pnt P3da = C3d.Value (0.5 * (pfbid + plbid));
du = plbid - pfbid;
const int NBSTEPS = 10;
Standard_Real aPrec2 = 0.25 * Precision::Confusion() * Precision::Confusion();
degenerated = Standard_True;
for (Standard_Integer i=0; i <= NBSTEPS; i++)
{
Standard_Real u = pfbid + i * du / NBSTEPS;
gp_Pnt P3db = C3d.Value (u);
Standard_Real aR2 = P3da.SquareDistance (P3db);
if (aR2 > aPrec2) {
degenerated = Standard_False;
break;
}
}
}//if(!degenerated)
//-- ----------------------------------------
Tole = BRep_Tool::Tolerance(edge);