Title: Real-time voxel rendering algorithm based on screen space billboard voxel buffer with sparse lookup textures
Authors: Jabłoński, Szymon
Martyn, Tomasz
Citation: WSCG 2016: full papers proceedings: 24th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision in co-operation with EUROGRAPHICS Association, p. 27-36.
Issue Date: 2016
Publisher: Václav Skala - UNION Agency
Document type: konferenční příspěvek
URI: wscg.zcu.cz/WSCG2016/!!_CSRN-2601.pdf
ISBN: 978-80-86943-57-2
ISSN: 2464–4617 (print)
2464–4625 (CD-ROM)
Keywords: počítačová grafika;vykreslování voxelů;řídké voxelové oktávy;řídká textura;bodová mračna;geometrický shader;billboarding
Keywords in different language: computer graphics;voxel rendering;sparse voxel octree;sparse texture;point clouds;geometry shader;billboarding
Abstract: In this paper, we present a novel approach to efficient real-time rendering of numerous high-resolution voxelized objects. We present a voxel rendering algorithm based on triangle rasterization pipeline with screen space rendering computational complexity. In order to limit the number of vertex shader invocations, voxel filtering algorithm with fixed size voxel data buffer was developed. Voxelized objects are represented by sparse voxel octree (SVO) structure. Using sparse texture available in modern graphics APIs, we create a 3D lookup table for voxel ids. Voxel filtering algorithm is based on 3D sparse texture ray marching approach. Screen Space Billboard Voxel Buffer is filled by voxels from visible voxels point cloud. Thanks to using 3D sparse textures, we are able to store high-resolution objects in VRAM memory. Moreover, sparse texture mipmaps can be used to control object level of detail (LOD). The geometry of a voxelized object is represented by a collection of points extracted from object SVO. Each point is defined by position, normal vector and texture coordinates. We also show how to take advantage of programmable geometry shaders in order to store voxel objects with extremely low memory requirements and to perform real-time visualization. Moreover, geometry shaders are used to generate billboard quads from the point cloud and to perform fast face culling. As a result, we obtained comparable or even better performance results in comparison to SVO ray tracing approach. The number of rendered voxels is limited to defined Screen Space Billboard Voxel Buffer resolution. Last but not least, thanks to graphics card adapter support, developed algorithm can be easily integrated with any graphics engine using triangle rasterization pipeline.
Rights: © Václav Skala - UNION Agency
Appears in Collections:WSCG 2016: Full Papers Proceedings

Files in This Item:
File Description SizeFormat 
Jablonsky.pdfPlný text6,91 MBAdobe PDFView/Open

Please use this identifier to cite or link to this item: http://hdl.handle.net/11025/29528

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.