CUDA Voxelizer v0.1

Time to release something that’s been gathering dust on my hard drive for a bit too long: I wrote a CUDA-accelerated voxelizer. It converts polygon meshes into annotated voxel grids. You can download source code and executables on Github.

• Written in C++ / CUDA
• Outputs data to .binvox file format (default) or a morton-ordered grid. More output formats (magicavoxel, minecraft schematic) are in development.
• Requires a CUDA-compatible video card. Compute Capability 2.0 or higher (Nvidia Fermi or better).

cuda_voxelizer implements an optimized version of the method described in M. Schwarz and HP Seidel’s 2010 paper Fast Parallel Surface and Solid Voxelization on GPU’s. The morton-encoded table was based on my 2013 HPG paper Out-Of-Core construction of Sparse Voxel Octrees and the work in my libmorton library.

cuda_voxelizer is built with a focus on performance. Usage of the routine as a per-frame voxelization step for real-time applications is viable. More performance metrics are on the todo list, but on a GTX 1060 these are the voxelization timings for the Stanford Bunny Model (1,55 MB, 70k triangles), including GPU memory transfers.

More to come! I’m focusing on outputting to Minecraft schematics ASAP, to offer an alternative to Patrick Min’s excellent, but memory-limited binvox.

There is also still a lot of headroom for performance improvements.