[vtkusers] Implicit functions rendering using an octree

[Dimitris Andritsos]

Hello everyone,

I am a new user to VTK and I would like your help. I am designing a programm 
that takes as input implicit functions (in the form of an equation), parses 
and evaluates them. During the evaluation phase, an octree data structure is 
constructed and I want to use VTK to view the surface. How should this be 
done?

I tried using marching cubes and although it works, because vtkImage data 
have to be used, the number of evaluations is very big and the time it takes 
to render the surfaces is prohibitive. Can another type of data set be used 
with the octree and marching cubes or any other contouring class of Vtk? The 
octree uses the cube as the basic voxel. The problem associated with the 
octree, as I understand it, is that I end up with cubes of various sizes and 
this is why I can't use marching cubes.

I would really appreciate any help on this problem. It is not mandatory that 
I have to go with the octree so any other suggestion is welcome. I am 
thinking of the octree for performance efficiency reasons.

Thanks a lot in advance,
Jimmy

_________________________________________________________________
Tired of spam? Get advanced junk mail protection with MSN 8. 
http://join.msn.com/?page=features/junkmail