[vtkusers] Const get macros?

[David Doria]

Are there const get macros? (I didn't see any in vtkSetGet.h)

I have done this:
class vtkRay
{
vtkGetVector3Macro(Origin,double);
}

and later accessed it with;
void MyFunc(const vtkRay* R)
{
const double Ray1P1[3] = R->GetOrigin();
}

and it is saying that I can't call GetOrigin on R because R is const and
GetOrigin() is not a const function.

Should I just define my own Get functions when they need to be const?

Thanks,

David
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