OpenGL Insights

Octree-Based Sparse

Voxelization Using the GPU

Hardware Rasterizer

Cyril Crassin and Simon Green

22.1 Introduction

Discrete voxel representations are generating growing interest in a wide range of

applications in computational sciences and particularly in computer graphics. Ap-

plications range from fluid simulation [Crane et al. 05], collision detection [Allard

et al. 10], and radiative transfer simulation to detail rendering [Crassin et al. 09,

Crassin et al. 10, Laine and Karras 10] and real-time global illumination [Kaplanyan

and Dachsbacher 10,Thiedemann et al. 11,Crassin et al. 11]. When used in real-time

contexts, it becomes critical to achieve