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Real-time Digital Dome Rendering with Modern GPUs
Robert Kooima, Doug Roberts, Mark SubbaRao Adler Planetarium
Real-time Digital Dome Rendering with Modern GPUs Robert Kooima, - - PowerPoint PPT Presentation
Real-time Digital Dome Rendering with Modern GPUs Robert Kooima, - - PowerPoint PPT Presentation
Real-time Digital Dome Rendering with Modern GPUs Robert Kooima, Doug Roberts, Mark SubbaRao Adler Planetarium Adler Space Visualization Lab Real-time 3D Dome Rendering Why? Why not? Live planetarium shows Technically feasible
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Real-time 3D Dome Rendering
- Why?
- Live planetarium shows
- Adaptive
- Interactive
- Rapid content creation
- Why not?
- Technically feasible today
- Capable hardware is cheap
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How do we get it?
- Open source
- Application porting
- Portability
- Collaboration
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Real-time 3D Graphics
Vertices, Triangles, Fragments, Textures
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The 3D Pipeline
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The 3D Pipeline
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The 3D Pipeline
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The 3D Pipeline
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The 3D Pipeline
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Spherical Correction
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Categories of Spherical Correction
- Vertex Correction
- Geometry Correction
- Fragment Correction
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Vertex Correction
- Great for
- Points
- Finely-tessellated models
- Bad for
- Large polygons
- Long edges
- Programmable vertex processing helps!
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Geometry Correction
- Recursive subdivision of triangles
- Solves the long-edge problem
- Can result in an explosion of geometry
- Programmable geometry processing helps
Original Projected One step Two steps
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Fragment Correction
- Multi-pass render-to-texture
- Works in almost all circumstances
- Most expensive!
- As usual, programmable fragment processing helps
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- Cube-map
- Fragment-program ray casting
- Distortion map texture lookup
Fragment Techniques
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