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0025892: Wrong result obtained by projection algorithm.

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1) Treatment of case when projection algorithm to BSpline surface return null 2d curve.
2) Changed approximation of next step in default projection algorithm.
3) Special handling of surface of revolution added.

"Period jump" handling evaded in case when curve not computed.

Test cases for issue CR25892

Small correction of test cases fot CR25892
This commit is contained in:
aml
2015-03-19 16:33:43 +03:00
committed by bugmaster
parent 4e2914a6a0
commit 1cdee2a613
18 changed files with 342 additions and 54 deletions
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28
src/ProjLib/ProjLib_CompProjectedCurve.cxx
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@@ -767,7 +767,7 @@ void ProjLib_CompProjectedCurve::Init()
t = Triple.X() + Step;
if (t > LastU) t = LastU;
Standard_Real prevStep = Step;
Standard_Real U0, V0;
gp_Pnt2d aLowBorder(mySurface->FirstUParameter(),mySurface->FirstVParameter());
gp_Pnt2d aUppBorder(mySurface->LastUParameter(), mySurface->LastVParameter());
@@ -776,8 +776,8 @@ void ProjLib_CompProjectedCurve::Init()
while (t <= LastU && new_part)
{
U0 = Triple.Y() + (Triple.Y() - prevTriple.Y());
V0 = Triple.Z() + (Triple.Z() - prevTriple.Z());
U0 = Triple.Y() + (Step / prevStep) * (Triple.Y() - prevTriple.Y());
V0 = Triple.Z() + (Step / prevStep) * (Triple.Z() - prevTriple.Z());
// adjust U0 to be in [mySurface->FirstUParameter(),mySurface->LastUParameter()]
U0 = Min(Max(U0, aLowBorder.X()), aUppBorder.X());
// adjust V0 to be in [mySurface->FirstVParameter(),mySurface->LastVParameter()]
@@ -837,9 +837,27 @@ void ProjLib_CompProjectedCurve::Init()
// Go further
else
{
prevTriple = Triple;
prevTriple = Triple;
prevStep = Step;
Triple = gp_Pnt(t, aPrjPS.Solution().X(), aPrjPS.Solution().Y());
if (mySurface->GetType() == GeomAbs_SurfaceOfRevolution &&
(Abs (Triple.Z() - mySurface->FirstVParameter()) < Precision::Confusion() ||
Abs (Triple.Z() - mySurface->LastVParameter() ) < Precision::Confusion() ))
{
// Go out from possible attraktor.
Standard_Real U,V;
InitialPoint(myCurve->Value(t), t, myCurve, mySurface, myTolU, myTolV, U, V);
if (Abs (Abs(U - Triple.Y()) - mySurface->UPeriod()) < Precision::Confusion())
{
// Handle period jump.
U = Triple.Y();
}
Triple.SetY(U);
Triple.SetZ(V);
}
if((Triple.X() - mySequence->Value(myNbCurves)->Value(mySequence->Value(myNbCurves)->Length()).X()) > 1.e-10)
mySequence->Value(myNbCurves)->Append(Triple);
if (t == LastU) {t = LastU + 1; break;}//return;
@@ -854,7 +872,7 @@ void ProjLib_CompProjectedCurve::Init()
Step = WalkStep;
t += Step;
if (t > (LastU-MinStep/2) )
{
{
Step =Step+LastU-t;
t = LastU;
}