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SIBGRAPI 2005 Natal - RN - Brazil GPU-BasedGPU-Based VolumeVolume RenderingRendering ofof UnstructuredUnstructured GridsGrids João L. D. Comba UFRGS Cláudio T. Silva University of Utah Steven P. Callahan University of Utah Fábio F. Bernardon UFRGS SIBGRAPI 2005 Natal - RN - Brazil XVIII Brazilian Symposium on Computer Graphics and Image Processing GPU-Based Volume Rendering SIBGRAPI 2005 of Unstructured Grids Module 1: Graphics Hardware (GPUs) Module 2: Projected Tetrahedra Techniques Module 3: Isosurface Techniques break Module 4: Hw Assisted Visibility Sorting (HAVS) Module 5: HW Ray-Casting Module 6: Conclusion GPU-Based Volume Rendering of Unstructured Grids GPU-BasedGPU-Based VolumeVolume RenderingRendering ofof UnstructuredUnstructured GridsGrids Module 1: Graphics Hardware João L. D. Comba UFRGS SIBGRAPI 2005 Natal - RN - Brazil XVIII Brazilian Symposium on Computer Graphics and Image Processing Pre-GPU Graphics SIBGRAPI 2005 Acceleration •Integrated Graphics Architecture •Silicon Graphics •Evans & Sutherland GPU-Based Volume Rendering of Unstructured Grids Graphics Pipeline SIBGRAPI 2005 3D Application or Game 3D API commands 3D API: OpenGL or Direct 3D Vertices Transformed Colored Pixel Fragments Vertices Fragments Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations GPU-Based Volume Rendering of Unstructured Grids Graphics Pipeline SIBGRAPI 2005 3D Application glBegin(GL_TRIANGLES); or Game glVertex3f(0.0,0.0,0.0); 3D API commands glVertex3f(1.0,0.0,0.0); glVertex3f(0.5,1.0,0.0); 3D API: ... OpenGL or glEnd(); Direct 3D Vertices Transformed Colored Pixel Fragments Vertices Fragments Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations GPU-Based Volume Rendering of Unstructured Grids Graphics Pipeline SIBGRAPI 2005 1 3D Application or Game 3D API commands 4 3D API: 2 OpenGL or Direct 3D Vertices 3 Transformed Colored Pixel Fragments Vertices Fragments Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations GPU-Based Volume Rendering of Unstructured Grids Graphics Pipeline SIBGRAPI 2005 1 3D Application or Game 3D API commands 4 3D API: 2 OpenGL or Direct 3D 4 Vertices 3 3 1 1 2 3 Transformed Colored Pixel Fragments Vertices Fragments Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations GPU-Based Volume Rendering of Unstructured Grids Graphics Pipeline SIBGRAPI 2005 3D Application or Game 3D API commands 3D API: OpenGL or Direct 3D 4Vertices 3 1 1 2 3 Transformed Colored Pixel Fragments Vertices Fragments Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations GPU-Based Volume Rendering of Unstructured Grids Graphics Pipeline SIBGRAPI 2005 3D Application or Game 3D API commands 3D API: OpenGL or Direct 3D Vertices 4 2 3 1 3 Transformed Colored Pixel Fragments Vertices Fragments Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations 1’ GPU-Based Volume Rendering of Unstructured Grids Graphics Pipeline SIBGRAPI 2005 3D Application or Game 3D API commands 3D API: OpenGL or Direct 3D Vertices 3 1 3 4 Transformed Colored Pixel Fragments Vertices Fragments Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations 2’ 1’ GPU-Based Volume Rendering of Unstructured Grids Graphics Pipeline SIBGRAPI 2005 3D Application or Game 3D API commands 3D API: OpenGL or Direct 3D Vertices 1 3 4 Transformed Colored Pixel Fragments Vertices Fragments Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations 3’ 2’ 1’ GPU-Based Volume Rendering of Unstructured Grids Graphics1’ Pipeline SIBGRAPI 2005 3D Application or Game 3D API commands 4 3D API: 2’ OpenGL or Direct 3D Vertices 3’ 1 3 4 Transformed Colored Pixel Fragments Vertices Fragments Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations GPU-Based Volume Rendering of Unstructured Grids Graphics1’ Pipeline SIBGRAPI 2005 3D Application or Game 3D API commands 3D API: 2’ OpenGL or Direct 3D Vertices 3’ 1 3 4 Transformed Colored Pixel Fragments Vertices Fragments Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations GPU-Based Volume Rendering of Unstructured Grids Graphics Pipeline SIBGRAPI 2005 3D Application or Game 3D API commands 3D API: OpenGL or Direct 3D Vertices Colored 3 4 Transformed Fragments Pixel Fragments Vertices Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations 1’ GPU-Based Volume Rendering of Unstructured Grids Graphics Pipeline SIBGRAPI 2005 3D Application or Game 3D API commands 3D API: OpenGL or Direct 3D Vertices Colored 4 Transformed Fragments Pixel Fragments Vertices Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations 3’ 1’ GPU-Based Volume Rendering of Unstructured Grids Graphics Pipeline SIBGRAPI 2005 3D Application or Game 3D API commands 3D API: OpenGL or Direct 3D Vertices Colored Transformed Fragments Pixel Fragments Vertices Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations 4’ 3’ 1’ GPU-Based Volume Rendering of Unstructured Grids Graphics Pipeline SIBGRAPI 2005 3D Application or Game 3D API commands 3D API: OpenGL or Direct 3D Vertices Transformed Colored Pixel Fragments Vertices Fragments Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations GPU-Based Volume Rendering of Unstructured Grids Graphics Pipeline SIBGRAPI 2005 3D Application or Game 3D API commands 3D API: OpenGL or Direct 3D Vertices Transformed Colored Pixel Fragments Vertices Fragments Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations GPU-Based Volume Rendering of Unstructured Grids Graphics Pipeline SIBGRAPI 2005 3D Application or Game 3D API commands 3D API: OpenGL or Direct 3D Vertices Transformed Colored Pixel Fragments Vertices Fragments Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations GPU-Based Volume Rendering of Unstructured Grids Graphics Pipeline SIBGRAPI 2005 3D Application or Game 3D API commands 3D API: OpenGL or Direct 3D Vertices Transformed Colored Pixel Fragments Vertices Fragments Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations GPU-Based Volume Rendering of Unstructured Grids First-Generation GPUS SIBGRAPI 2005 (up to 1998) •NVIDIA TNT2, ATI NVIDIA TNT2 Rage, 3dfx Voodoo3 •Relevant tasks: – Rasterizing pre- transformed triangles – Applying one or two VOODOO 3 textures – Implement DirectX 6 feature set GPU-Based Volume Rendering of Unstructured Grids GPUs SIBGRAPI 2005 3D Application or Game 3D API commands 3D API: OpenGL or Direct 3D Vertices Transformed Colored Pixel Fragments Vertices Fragments Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations GPU-Based Volume Rendering of Unstructured Grids Second-Generation SIBGRAPI 2005 GPUS (1999-2000) •NVIDIA GeForce 256, GeForce2, ATI Radeon 7500, S3 Savage 3D •Relevant tasks: – Transformation & GeForce2 GTS Lighting (T&L) em Hardware – Implement DirectX 7 feature set – Cube map textures – More math operations for combining textures (still limited) ATI Radeon 7500 AIW GPU-Based Volume Rendering of Unstructured Grids GPUs SIBGRAPI 2005 3D Application or Game 3D API commands 3D API: OpenGL or Direct 3D Vertices Transformed Colored Pixel Fragments Vertices Fragments Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations GPU-Based Volume Rendering of Unstructured Grids Third-Generation GPUS SIBGRAPI 2005 (2001) •NVIDIA GeForce 3, GeForce4 Ti, Microsoft XBox, ATI Radeon 8500, Quadro 4 •Relevant tasks: – Vertex programmability rather QUADRO 4 XGL 900 than more configurability – More pixel-level (fragment) configurability (not truly programmable) – 3D Textures – Shadow Maps ATI Radeon 8500 GPU-Based Volume Rendering of Unstructured Grids GPUs SIBGRAPI 2005 3D Application or Game 3D API commands 3D API: OpenGL or Direct 3D Vertices Transformed Colored Pixel Fragments Vertices Fragments Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation and Rasterization and Coloring Operations Programmable Vertex Processor GPU-Based Volume Rendering of Unstructured Grids Fourth-Generation SIBGRAPI 2005 GPUS (2002-2003) •NVIDIA GeForce FX family, ATI 9700, ATI 9800 •Relevant tasks: – Vertex and Fragment programmability ATI Radeon 9800 – Implement DirectX 9 feature set – 32 Bit IEEE Floating Point per component (128-bit textures) Intel Pentium 4 2.4 Ghz = 55 million transistors NVIDIA GeForce FX 5800 = 125 million transistor NVIDIA GeForceFX 5800 2.27 GPU-Based Volume Rendering of Unstructured Grids GPUs SIBGRAPI 2005 3D Application or Game 3D API commands 3D API: OpenGL or Direct 3D Vertices Transformed Colored Pixel Fragments Vertices Fragments Updates Fragment Texturing Raster Vertex Primitive Assembly FB Transformation
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