Introduction to 3D Computer Graphics
Jian Huang
219 Claxton Complex
What Is ‘Computer Graphics’?
Using a computer as a rendering tool for the generation from
models and manipulation of images is called computer
graphics. Even better, image synthesis.
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Goals of Computer Graphics
•(This semester) Generate synthetic images
that look real (cool) !
•Do it in a practical way and scientifically
sound, and in real time?
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Realism Through Synthesis
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Play Games …
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Major Topics
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Geometry Processing
Rasterization
Advanced Lighting and Shading
Graphics Architecture
Performance Techniques
Other Advanced Topics: image-based
rendering, volume rendering, non-photo
realistic rendering etc.
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Modeling
• How to represent real environments
• shape: curves, surfaces, volumes
• appearance: light, color, material, reflectance
• How to build these representations
• Modeling
• Procedurally (fractals, algebraic/geometric Methods,
extraction)
• 3D scan of the real world
• The Primitives -lines, triangles, quads, patches,
(sometimes not needed), cylinders, spheres.
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Make Cool Objects …
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Scanned 3D Objects
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Modeling - Algorithmic
Primitives ?
Design
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Extracted
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3D Models
Primitives ?
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Modeling - Procedural
Out Of Nowhere ! - Fractals
Primitives ?
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Rendering
• What’s an image?
• Distribution of light energy on 2D “film”
• How do we represent and store images
• Framebuffer: 2D array of “pixels”: p[x,y]
• Render: generate images from scenes
• Input: 3D description of scene (models), camera, light …
• Output: framebuffer
Application
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Geometry
Rasterizer
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Rendering
Primitives
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The Quest for Visual Realism
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Examples
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Synthesize Special Effects
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Interaction
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Interaction - Simpler !
cis681
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Visualization …
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Visualization
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What is It I Expect
• Good Programming Background - C/C++
• Basic Linear Algebra - Matrices, Vectors
• Basic Computer Science - Data Structures, Computer
architecture
• Sleep Deprivation :).
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I Am Not Going To !
•Teach C/C++
•Teach Data Structures
•Teach Linear Algebra
•Lab Procedures are your responsibility
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