Rendering, OpenGL, and Lighting - Caltech

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Notes on GLSL pipeline• The vertex <strong>and</strong> pixel shader pipelinewas designed for graphics– There are some issues with using it fornon-graphics computation• Since shaders replace existing parts ofthe pipeline, often need to re-implement<strong>and</strong> extend default algorithms– However, the GLSL environment makesthis pretty easy
Vertex shaders• Vertex shaders are responsible for allper-vertex calculations• In the default pipeline:– Convert vertices from object space to NDC– Perform all lighting/texture coordinatecalculations
Page 3: Spaces• Object space (also called
Page 6 and 7: Spaces• (Clipped) Normalized Devi
Page 8 and 9: SpacesNominally, the spaces are rel
Page 10 and 11: Transformations• Matrix multiplic
Page 12 and 13: Transformations• Rotation is more
Page 14 and 15: Transformations• Projection trans
Page 16 and 17: Rasterization• Draw triangles fro
Page 18 and 19: OpenGL• So what does OpenGL do?-
Page 20 and 21: OpenGL transformation stacks• Sta
Page 22 and 23: OpenGL transformations• Function
Page 24 and 25: OpenGL geometry/rendering• How do
Page 26 and 27: How to render with OpenGL• Initia
Page 28 and 29: Simple lighting models• Flat, Gou
Page 30 and 31: Simple lighting models• The rende
Page 32 and 33: Specular lighting• Specular compo
Page 34 and 35: Homework 1• Implement per-pixel l
Page 36 and 37: Recitation contents• Explanation
Page 38 and 39: Simple lighting models• Diffuse c
Page 40 and 41: Simple lighting models• Overall l
Page 42 and 43: Blinn shading
Page 44 and 45: Phong shading (pixels)
Page 46 and 47: Default OpenGL pipelineVertex dataW
Page 50 and 51: Fragment shaders• Fragment shader
Page 52 and 53: GLSL syntax and programming• GLSL
Page 54 and 55: GLSL built-in variables• Handy re
Page 56 and 57: Fragment shader built-in variables
Page 58 and 59: Built-in functions• dot() - takes
Page 60 and 61: Sample vertex shaderuniform int amb
Page 62 and 63: Using shaders• Example included i

Rendering, OpenGL, and Lighting - Caltech

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