Ray Tracing Bezier Surface - IIIT Hyderabad

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IIIT HyderabadOur Approach• Mixed hierarchy: consists oftwo hierarchical structures.– Top level BVH: Boundingboxes of original patches.– Leaf nodes represent theoriginal Bezier Surfaces.– Each Patch is divided intofixed size subpatches,hierarchically, using DeCasteljau algorithm.– Subtree for each patch frombounding boxes of thesubdivided patches.1 2 3 4BVH forPatchesSubpatchHierarchy
IIIT HyderabadMixed Hierarchy Advantages• Tighter bounds of subpatch– Eliminates more rays– Better Initialization• Low Additional memory– Intersection performed onoriginal patches.• Better suited for the GPU– Shared memory stores skippointer and subpatch number.We subdivide 6 times.1 2 3 4BVH forPatchesSubpatchHierarchy
Page 1 and 2: IIIT HyderabadHybrid Ray Tracing an
Page 3 and 4: IIIT HyderabadParametric Surface: M
Page 5 and 6: IIIT HyderabadRendering Bezier Surf
Page 7 and 8: IIIT HyderabadRay Tracing Bezier Su
Page 9: IIIT HyderabadGeimer 2005• Based
Page 13 and 14: IIIT HyderabadGPU Implementation•
Page 15 and 16: IIIT HyderabadHybrid Ray TracingGen
Page 17: IIIT HyderabadResults (Primary+Seco
Page 20 and 21: IIIT HyderabadPath TracingBigguy in
Page 22 and 23: IIIT HyderabadPath TracingBigguy in
Page 24 and 25: IIIT HyderabadConclusions• A mixe
Page 26: IIIT HyderabadResultsIntel i7 920 +

Ray Tracing Bezier Surface - IIIT Hyderabad

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