Improvements to VolumeResampler.

[David Williams]

PolyVox's VolumeResampler is not really correct... it uses trilinear interpolation to scale the volume rather than applying a proper resampling kernel via convolution. A correct version should be implemented and I believe this will help with performing LOD on smooth voxel terrain.

[David Williams]

I think this might not happen in time for the version 0.3 release.

[David Williams]

Useful links:

http://entropymine.com/imageworsener/resample/ http://rastergrid.com/blog/2010/09/efficient-gaussian-blur-with-linear-sampling/