vtkFloatingPointType has always been equivalent to double, but they
removed this typedef/define years ago apparently. In the current API,
these functions specify doubles:
http://www.vtk.org/doc/nightly/html/classvtkViewport.html (vtkRenderer
is a derived class of vtkViewport and the member functions in question
are not overridden in vtkRenderer). Ref #598
vtkFloatingPointType has always been equivalent to double, but they removed this typedef/define years ago apparently. In the current API, these functions specify doubles: http://www.vtk.org/doc/nightly/html/classvtkViewport.html (vtkRenderer is a derived class of vtkViewport and the member functions in question are not overridden in vtkRenderer). Ref #598