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add methods to get normal and curvature information from surfaces

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This commit is contained in:
wmayer
2017-08-14 12:24:42 +02:00
parent 6482870c8b
commit 3fee9bad3e
4 changed files with 236 additions and 6 deletions
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66
src/Mod/Part/App/Geometry.cpp
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@@ -3657,7 +3657,7 @@ TopoDS_Shape GeomSurface::toShape() const
bool GeomSurface::tangentU(double u, double v, gp_Dir& dirU) const
{
Handle(Geom_Surface) s = Handle(Geom_Surface)::DownCast(handle());
GeomLProp_SLProps prop(s,u,v,1,Precision::Confusion());
GeomLProp_SLProps prop(s,u,v,2,Precision::Confusion());
if (prop.IsTangentUDefined()) {
prop.TangentU(dirU);
return true;
@@ -3669,7 +3669,7 @@ bool GeomSurface::tangentU(double u, double v, gp_Dir& dirU) const
bool GeomSurface::tangentV(double u, double v, gp_Dir& dirV) const
{
Handle(Geom_Surface) s = Handle(Geom_Surface)::DownCast(handle());
GeomLProp_SLProps prop(s,u,v,1,Precision::Confusion());
GeomLProp_SLProps prop(s,u,v,2,Precision::Confusion());
if (prop.IsTangentVDefined()) {
prop.TangentV(dirV);
return true;
@@ -3678,6 +3678,68 @@ bool GeomSurface::tangentV(double u, double v, gp_Dir& dirV) const
return false;
}
bool GeomSurface::normal(double u, double v, gp_Dir& dir) const
{
Handle(Geom_Surface) s = Handle(Geom_Surface)::DownCast(handle());
GeomLProp_SLProps prop(s,u,v,2,Precision::Confusion());
if (prop.IsNormalDefined()) {
dir = prop.Normal();
return true;
}
return false;
}
bool GeomSurface::isUmbillic(double u, double v) const
{
Handle(Geom_Surface) s = Handle(Geom_Surface)::DownCast(handle());
GeomLProp_SLProps prop(s,u,v,2,Precision::Confusion());
if (prop.IsCurvatureDefined()) {
return prop.IsUmbilic();
}
throw Base::RuntimeError("No curvature defined");
}
double GeomSurface::curvature(double u, double v, Curvature type) const
{
Handle(Geom_Surface) s = Handle(Geom_Surface)::DownCast(handle());
GeomLProp_SLProps prop(s,u,v,2,Precision::Confusion());
if (prop.IsCurvatureDefined()) {
double value = 0;
switch (type) {
case Maximum:
value = prop.MaxCurvature();
break;
case Minimum:
value = prop.MinCurvature();
break;
case Mean:
value = prop.MeanCurvature();
break;
case Gaussian:
value = prop.GaussianCurvature();
break;
}
return value;
}
throw Base::RuntimeError("No curvature defined");
}
void GeomSurface::curvatureDirections(double u, double v, gp_Dir& maxD, gp_Dir& minD) const
{
Handle(Geom_Surface) s = Handle(Geom_Surface)::DownCast(handle());
GeomLProp_SLProps prop(s,u,v,2,Precision::Confusion());
if (prop.IsCurvatureDefined()) {
prop.CurvatureDirections(maxD, minD);
return;
}
throw Base::RuntimeError("No curvature defined");
}
// -------------------------------------------------
TYPESYSTEM_SOURCE(Part::GeomBezierSurface,Part::GeomSurface)