4D Volume Rendering - Nvidia

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Volume Rendering ApproachesVolume DataObject-Order Texture SlicingCPU - Plane-box intersectionGPU – 3d texture & transfer functionlookupImage-Order RaycastingCPU – Quad to invoke fragment shaderGPU – All the heavy liftting!Raycasting + texture lookupRTVG Siggraph Course
Transfer function lookupTexture 1//simple shader that looks up rgba from colortable for grayscale volumeuniform sampler3D volumeTex; // volume datauniform sampler1D transferFuncTex; //color map texturevoid main(void){float intensity = texture3D(volumeTex, gl_TexCoord[0].xyz).a;gl_FragColor = texture1D(transferFuncTex, intensity);}
Page 1 and 2: 4D Volume RenderingShalini Venkatar
Page 3: Outline• Volume rendering techniq
Page 7: CUDA RaycastingInitdim3 m_blockSize
Page 10 and 11: Multi-pass raycasting - OpenGLFBOFr
Page 12 and 13: Pass 2- Draw on-screen quadInvoke r
Page 14 and 15: 4D - Caching all time steps• When
Page 16 and 17: Texture Streaming• When graphics
Page 18 and 19: CPU Asynchronous streaming• Non C
Page 20 and 21: PBO Implementation- DrawDraw - app-
Page 22 and 23: GPU Async - ImplementationMain draw
Page 24 and 25: Multi-GPU Distributed RenderingSort
Page 26 and 27: Stereo in Volume Rendering• Provi
Page 28: Demo and Q&Ashaliniv@nvidia.comSeis

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