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2017 GTC San Jose

S7698 - CanvoX: High-Resolution VR Painting for Large Volumetric Canvas

Session Speakers
Session Description

As Tilt Brush and Quill are not voxel based, a new VR-based voxel painting system with large (40km^3) and detailed (0.3mm^3) canvas would be interesting. We develop an array of octree of depth 24, using 5 indices per cell: parent, child, and 3-neighbors to accelerate ray traversal. We adaptively refine or coarsen the octree in CPU and sync it with GPU, and then ray cast front to back. To accelerate, we develop a foveated rendering algorithm. We design a quadtree render target whose resolution is dynamically adjusted to heat map, traverse ray, and then interpolate the color in screen space. We traverse ray through upper-level cells as the ray cone widens. We analyze floating point error propagations to thoroughly understand precision problems in deep cells and ray intersections.


Additional Session Information
All
Talk
Virtual Reality and Augmented Reality
Software
25 minutes
Session Schedule