Re: [Algorithms] mesh to 3D texture?

[Christian H. <c....@qu...>]

Hi Jeff,

recently did some research myself, haven't yet come to the 
implementation side of things, so can't say much about real-world 
applicability:

These are IMHO the most promising results, when it comes to 
non-exlusively-binary voxelization:

Real-time GPU-based Voxelization and Applications (March 2011)
http://www.cs.wisc.edu/techreports/viewreport.php?report=1688

Two Simple Single-pass GPU methods for Multi-channel Surface 
Voxelization of Dynamic Scenes (Pacific Graphics 2011)
http://graphics.cs.aueb.gr/graphics/docs/papers/PG-2011optimized.pdf

They both give a nice wrap-up of previous work (especially Eisemann) and 
discuss the kind of problems you are worried about.
I will go for the second paper as basis for my implementation, not 
completely sure about performance though.

@all: if anyone has experience with those two papers, I'd be glad to know :)

Chris

> So, suppose that I wanted to voxelize a mesh into a regular 3D grid (a 
> 3D texture on the GPU, fairly low res, something like 64^3). At each 
> point I'd like to have access to color, a (rough) surface normal, and 
> some kind of indicator of whether the space is "empty" or "filled".
>
> Is there some clever way I can use GPU rasterization to fill it 
> (ideally keeping the whole process on the GPU)? I thought about 
> rendering the mesh in slices with very narrow front and back clip 
> planes, once for each slice of the 3D texture, but it seems like there 
> could be issues with polygons perpendicular to my z axis not showing 
> up, creating holes...
>
> Any advice?
>
> -- 
> Jeff Russell
> Engineer, 8monkey Labs
> www.8monkeylabs.com <http://www.8monkeylabs.com>
>
>
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