[vtkusers] Generating a surface with equilateral triangles from point data

[Simon Drouin]

I haven't found a solution to that problem in vtk. vtkDelauney2D will
generate similar results. My current workaround is to extract vtkPoints from
my actor, feed them into the Triangle library (
http://www.cs.cmu.edu/~quake/triangle.html)  and put the resulting
triangulation back in a vtkPolyData. Triangle does a very nice job and
allows you to specify the maximum angle you want in your triangle as well as
the maximum triangle area.

s.

On Wed, Nov 12, 2008 at 12:41 PM, Steven Boyd <skboyd at ucalgary.ca> wrote:

> Hi,
>
> How can I generate more or less equilateral triangles from a series of
> points that define the perimeter of a closed loop (e.g., an oval)? When I
> use vtkTriangleFilter the resulting triangles have poor aspect ratios (they
> have vertices on the perimeter of the oval and therefore are quite
> stretched).   Can somebody suggest an approach where the triangles
> generated
> would be closer to equilateral?  Adding points to the centre would seem to
> be necessary, but I was hoping there might be a filter that could do this
> without manually adding points.
>
> Thanks,
>
> Steve
>
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