Hi there, time for some updates on my voxel rendering pipeline! Lot of work behind the scenes last month, and now taking some time to pause and reflect on where the interesting research opportunities are. The lowdown for people just joining in: I’m building a Sparse Voxel Octree raycaster, so …
A short video I made demonstrating the improvements in my voxelizer, a higher grid resolution (1024x1024x1024) and multiple light sources.
Just a quick piccie: thanks to optimizations in my out-of-core octree building algorithm, I can now render even bigger voxel fields (1024^3), which is about 107 million voxels. Reading in the data is the slowest part, the actual building of the octree is blazingly fast (< 500 ms), since the …
Transforming a polygon mesh into a 3D grid / voxel data set is still the quickest way to play with some interesting data in any voxel-based application. You can do this interactively on the GPU, using Eisemann/Décoret’s method, described in Single-pass GPU solid voxelization for real-time applications (2008). When it comes to …
In order to correctly voxelize larger meshes with configurable parameters (shell thickness, seperability parameters, …) I’m now implementing the method described in An Accurate Method for Voxelizing Polygon Meshes, by Jian Huang, Roni Yagel, Vassily Filippov and Yair Kurzion. In the paper, they provide a mathematical basis for voxelizing polygonal meshes, and …
I’ve uploaded a new video containing my most recent work on my Sparse Voxel Octree raycaster. Thanks to advances in my own voxelizer, I’ve been able to include sampled normal information and render diffuse shading now.
On the third and last day of the Eurographics Symposium on Rendering (EGSR 2012) in Paris, the 29th of june, some attendees turned up with a fuzzy head – I guess most of the German guests had to drown their loss in the EK semi-finals with a lot of wine As …
After a few weeks of optimizing and getting a lot of good C++ advice from Ares Lagae, I consider my CPU-based voxel raycaster as done. I now have a good framework to test some more interesting stuff on. It offers real-time performance, even for large voxel grids, and I’ve structured the …
During my PhD work, I’ve ran into a lot of practical issues with constructing and traversing sparse voxel Octrees. I’m introducing a new file format to store them, based on the .binvox file format by Michael Kashdan. The format is called .moctree, which stands for Morton-encoded Octree. It contains the leaf …
After some days of tweaking my SVO renderer’s performance, it became clear that I needed a more cache-coherent and space-efficient way of storing/accessing the octree data. I decided to start a seperate C++ project that efficiently converts a .binvox Voxel Grid into a Sparse Voxel Octree. Some discussions with my …