[vtkusers] Create 3-D surface from 2-D contours of slices

[jimcp at cox.net]

I am not sure if there is a free description of the content of "polydata". The vtk book is the definitive reference and does go into considerable detail regarding the meaning of the term "polydata". My interpretation is it is a term used for any unstructured grid representation, this could be a limited or incomplete due to my own limited understanding. My understanding is Polydata objects always contain some number of points coordinates and may have lines, polygons, normals, scalars or other forms of array data associated with the object being described. 

This means the output from the contour widget is polydata of points and lines, the output from other filters may be cells, triangle strips or the like. My suggestion would be to run the example exactly first, then replace the generation of the circles with your contour widget output. you may need to take some additional actions to assert that the point ids you build into the contour are oriented to produce a useful set of polygons. 

Hope that helps, 
Jim 
---- shengweng <shengwen.guo at gmail.com> wrote: 
> 
>  I have tried the method before, but I could only display the contours, and
> could not get surface.
>  The following code you pointed out generated the PolyData explicitly, but
> the ContourWidget create the PolyData implicitly, I don't know how to check
> if the contours are stored in the PolyData correctly and there were points
> and lines, no vertex,cells in the PolyData.
>   How to incorporate the 2-D contours including points and lines with
> z-depth(slice dimension) and then convert them into effective PolyData with
> x,y,z values?
> 
>   
> 
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