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Part: Check for straight splines or Bezier curves

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Straight splines or Bezier curves can be considered as line segments and thus can be used to measure e.g. angles.

This fixes https://github.com/FreeCAD/FreeCAD/issues/22878
This commit is contained in:
wmayer
2025-08-14 18:31:41 +02:00
committed by Chris Hennes
parent c39ba51407
commit 4a1076c0cd
1 changed files with 20 additions and 3 deletions
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23
src/Mod/Part/App/MeasureClient.cpp
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@@ -36,6 +36,8 @@
#include <BRepGProp.hxx>
#include <BRepAdaptor_Curve.hxx>
#include <BRepAdaptor_Surface.hxx>
#include <Geom_BezierCurve.hxx>
#include <Geom_BSplineCurve.hxx>
#include <TopExp.hxx>
#include <GProp_GProps.hxx>
#include <ShapeAnalysis_Edge.hxx>
@@ -127,6 +129,13 @@ TopoDS_Shape getLocatedShape(const App::SubObjectT& subject, Base::Matrix4D* mat
App::MeasureElementType PartMeasureTypeCb(App::DocumentObject* ob, const char* subName)
{
auto isStraightBezierCurve = [](Handle(Geom_BezierCurve) curve) {
return curve->NbPoles() == 2;
};
auto isStraightBSplineCurve = [](Handle(Geom_BSplineCurve) curve) {
return curve->NbPoles() == 2;
};
TopoDS_Shape shape = Part::Feature::getShape(ob,
Part::ShapeOption::NeedSubElement
| Part::ShapeOption::ResolveLink
@@ -153,10 +162,18 @@ App::MeasureElementType PartMeasureTypeCb(App::DocumentObject* ob, const char* s
return ob->isDerivedFrom<Part::Datum>() ? App::MeasureElementType::LINE
: App::MeasureElementType::LINESEGMENT;
}
case GeomAbs_Circle: { return App::MeasureElementType::CIRCLE; }
case GeomAbs_BezierCurve:
case GeomAbs_Circle: {
return App::MeasureElementType::CIRCLE;
}
case GeomAbs_BezierCurve: {
return isStraightBezierCurve(curve.Bezier())
? App::MeasureElementType::LINESEGMENT
: App::MeasureElementType::CURVE;
}
case GeomAbs_BSplineCurve: {
return App::MeasureElementType::CURVE;
return isStraightBSplineCurve(curve.BSpline())
? App::MeasureElementType::LINESEGMENT
: App::MeasureElementType::CURVE;
}
default: { return App::MeasureElementType::INVALID; }
}