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

Michael Jackson mike.jackson at bluequartz.net
Thu Nov 13 09:38:28 EST 2008

I have the general code to do that if you want it. It is also based on  
the cmu "Quake" library.


On Nov 13, 2008, at 9:33 AM, Simon Drouin wrote:

> 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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