algorithm in vtkDecimate

[Will Schroeder]

>At 05:07 PM 5/18/00 -0600, vtk wrote:
>Hello everyone:
>   I am just wondering if someone knows the algorithm of vtkDecimate or
>   vtkDecimatePro?  Where can I find detailed information about it?
>
>   Thanks in advance!
>
>   Hope you guys have a nice weekend!
>
>   -Travis

Decimate: 
W.J. Schroeder, J. Zarge, and W.E. Lorensen. Decimation of Triangle Meshes. Computer Graphics  (SIGGRAPH `92), 26(2):65-70, August 1992. 

DecimatePro: 
W. J. Schroeder. A Topology Modifying Progressive Decimation Algorithm. Proc. of Visualization `97, pp 205-212, IEEE Computer Society Press, Los Alamitos, CA, October 1997.

Also find Garland & Heckbert's algorithm, which I think is the best and (not yet) implemented in VTK:
M. Garland & P. Heckbert. Surface simplicifcation using quadric error metrics. Computer Graphics (Siggraph '97 Proceedings). 1997, pp.209-216.
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