Real-Time Rendering (2nd Edition)

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1 ECE 595 / CS 491 / CS 591 Real-Time Rendering & Graphics Hardware Pradeep Sen Advanced Graphics Lab Class 21 April 11, 2007 Real-time Rendering & Graphics Hardware Pradeep Sen Class 21 – April 11, 2007 Announcements Project handout will be available online Real-time Rendering & Graphics Hardware Pradeep Sen Class 21 – April 11, 2007 Last time Real-time geometry representations Real-time Rendering & Graphics Hardware Pradeep Sen Class 21 – April 11, 2007 Today Procedural geometry for real-time applications Real-time Rendering & Graphics Hardware Pradeep Sen Class 21 – April 11, 2007 Introduction to procedural geometry Traditional ways to represent geometry has several disadvantages: – Large storage requirements: every polygon needs to be stored – Lack of scalability: not so easy to change resolution in real-time – Geometry is difficult to modify in the application – Bandwidth bottleneck between CPU and GPU Real-time Rendering & Graphics Hardware Pradeep Sen Class 21 – April 11, 2007 Introduction to procedural geometry Unlike standard geometry, procedural geometry is generated “on the fly” It has several advantages – Low storage overhead: typical tradeoff of computation for storage… store a small amount of information and reconstruct the rest – Scalable: The models can be generated at any target resolution – Reduce bandwidth bottleneck: less information to transmit from the CPU to GPU Real-time Rendering & Graphics Hardware Pradeep Sen Class 21 – April 11, 2007 Different kinds of “procedural” graphics Vertex and fragment shaders Procedural animation (physics based) Procedural geometry (plants, clouds, terrain) Real-time Rendering & Graphics Hardware Pradeep Sen Class 21 – April 11, 2007 Procedural animations Typically involve solving physics equations (mechanics) to determine the motion of objects in the environment Real-time Rendering & Graphics Hardware Pradeep Sen Class 21 – April 11, 2007 L-Systems Developed by biologist Aristid Lindenmayer to describe growth of simple multicellular organisms
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