Hi Arne,
The surface integral is the same as the surface area if the scalars on your
surface are constant.
So you would use vtkContourFilter to generate an isosurface of your
distance map at an isovalue of 0 and then use vtkMassProperties to calculate
the surface area of the resulting polydata. That should give you a discrete
approximation.

karthik
On 3/7/07, Arne Hansen <bsd.diverse@...> wrote:
>
> Hello. I have a 3dimensionel signed distance map, where a shape is
> embedded as the 0th surface. I need to calculate the surface integral
> of this 0th surface. How can i do this?
> thqnk you
>
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