Exploiting Graphics Hardware for Haptic Authoring Minho Kim Sukitti Punak, Juan Cendan, Sergei Kurenov, Jörg Peters.

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Presentation transcript:

Exploiting Graphics Hardware for Haptic Authoring Minho Kim Sukitti Punak, Juan Cendan, Sergei Kurenov, Jörg Peters SurfLab University of Florida

Surgical Haptic Authoring Kit  surgeon = author  haptic artifacts from coarse models distract! ●○○○○○○○○

subdivision surfaces  Catmull-Clark subdivision scheme ●●○○○○○○○

subdivision surfaces (cont’d)  Loop subdivision scheme ●●●○○○○○○

GPU shaders  programming on graphics hardware  primitive parallel processing (SIMD)  requires regular data structure ●●●●○○○○○

“A real-time GPU subdivision kernel”   20 speedup! ●●●●●○○○○

main contributions  reuses subdivision surface already calculated  localized rendering ●●●●●●○○○

technical details ●●●●●●●○○  configuration for test (this laptop) CPU: Pentium M (1.60GHz) GPU: GeForce Go 6200 system memory: 512MB video memory: 128MB (PCI Express 16x)  input models liver 274 triangles 139 vertices stomach 534 triangles 269 vertices

technical details (cont’d)  performance 3d modeldepthFPS (visual)FPS (visual+haptic)performance ratio liver % % stomach % % ●●●●●●●●○

summary  practical performance on modern GPUs  applicable to dynamic objects ●●●●●●●●●