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0029392: Modeling data - Exception when getting UIso of offset surface of surface of linear extrusion

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Added treatment for Geom_OffsetSurface::UIso() if basisSurface is Geom_SurfaceOfLinearExtrusion
This commit is contained in:
akaftasev 2020-11-19 14:42:18 +03:00 committed by bugmaster
parent 65eed8ff8e
commit 9ab58ebf65
3 changed files with 35 additions and 6 deletions
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20
src/Geom/Geom_OffsetSurface.cxx
View File

@ -46,6 +46,7 @@
#include <Geom_TrimmedCurve.hxx>
#include <Geom_UndefinedDerivative.hxx>
#include <Geom_UndefinedValue.hxx>
#include <GeomLProp_SLProps.hxx>
#include <GeomAbs_CurveType.hxx>
#include <GeomAbs_IsoType.hxx>
#include <GeomAbs_Shape.hxx>
@ -530,14 +531,27 @@ void Geom_OffsetSurface_VIsoEvaluator::Evaluate(Standard_Integer *,/*Dimension*/
//=======================================================================
//function : UIso
//purpose : The Uiso or the VIso of an OffsetSurface can't be clearly
// exprimed as a curve from Geom. So, to extract the U or VIso
// an Approximation is needed. This approx always will return a
// BSplineCurve from Geom.
// exprimed as a curve from Geom (except some particular cases).
// So, to extract the U or VIso an Approximation is needed.
// This approx always will return a BSplineCurve from Geom.
//=======================================================================
Handle(Geom_Curve) Geom_OffsetSurface::UIso (const Standard_Real UU) const
{
if (equivSurf.IsNull()) {
GeomAdaptor_Surface aGAsurf (basisSurf);
if (aGAsurf.GetType() == GeomAbs_SurfaceOfExtrusion)
{
Handle(Geom_Curve) aL = basisSurf->UIso(UU);
GeomLProp_SLProps aSurfProps (basisSurf, UU, 0., 2, Precision::Confusion());
gp_Vec aDir;
aDir = aSurfProps.Normal();
aDir *= offsetValue;
aL->Translate(aDir);
return aL;
}
const Standard_Integer Num1 = 0, Num2 = 0, Num3 = 1;
Handle(TColStd_HArray1OfReal) T1, T2, T3 = new TColStd_HArray1OfReal(1,Num3);
T3->Init(Precision::Approximation());

7
tests/bugs/modalg_7/bug26558 → tests/bugs/modalg_7/bug26558_1
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@ -1,6 +1,3 @@
puts "TODO OCC26558 ALL: An exception was caught"
puts "TODO OCC26558 ALL: TEST INCOMPLETE"
puts "========"
puts "0026558: Failing to build isoline for offset surface"
puts "========"
@ -11,3 +8,7 @@ restore [locate_data_file bug26558_s.brep] s
mksurface sur s
offset o sur 0.5
uiso icur o 0
smallview
fit
checkview -screenshot -2d -path ${imagedir}/${test_image}-3d.png

14
tests/bugs/modalg_7/bug26558_2 Normal file
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@ -0,0 +1,14 @@
puts "========"
puts "0026558: Failing to build isoline for offset surface"
puts "========"
puts ""
restore [locate_data_file bug26558_s.brep] s
mksurface sur s
offset o sur -0.5
uiso icur o 0
smallview
fit
checkview -screenshot -2d -path ${imagedir}/${test_image}-3d.png