Rendering, OpenGL, and Lighting - Caltech

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Sample vertex shaderuniform int ambientEnabled;varying vec3 normal, lightDir;void main() {normal = normalize(gl_NormalMatrix * gl_Normal);vec3 worldPos = vec3(gl_ModelViewMatrix * gl_Vertex);lightDir = normalize(vec3(gl_LightSource[0].position) - worldPos);gl_Position = ftransform();}
Sample fragment shaderuniform int ambientEnabled; // same as in vertex shadervarying vec3 normal, lightDir; // same as in vertex shadervoid main() {vec4 color = vec4(0, 0, 0, 0);if (ambientEnabled)color = gl_LightModel.ambient * gl_FrontMaterial.ambient;float NdotL = max(dot(normalize(normal),normalize(lightDir)), 0.0);color += (gl_FrontMaterial.diffuse * gl_LightSource[0].diffuse *NdotL);gl_FragColor = color;}
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 48 and 49: Notes on GLSL pipeline• The verte
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 62 and 63: Using shaders• Example included i
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Rendering, OpenGL, and Lighting - Caltech

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