Overview of Computer Graphics
Why Study
Fundamental Intellectual Challenges
- Creates and interacts with realistic virtual world
- Requires understanding of all aspects of physical world
- New computing methods, displays, technologies
Technical Challenges
- Math of projections, curves, surfaces
- Physics of lighting and shading
- Representing / operating shapes in 3D
- Animation / Simulation
- 3D graphics software programming and hardware
Topics
Rasterization 光栅化
- Project geometry primitives (3D triangles / polygons) onto the screen
- Break Projected primitives into fragments (pixels)
- Gold standard in Video Games (Real-time Applications)
- Real-time: 30 fps and above
Curves and Meshes
- How to represent geometry in Computer Graphics
Ray Tracing
- Shoot rays from the camera though each pixel
- Calculate intersection and shading
- Continue to bounce the rays still they hit light sources
- Gold standard in Animations / Movies (Offline Applications)
Animation / Simulation
- Key frame Animation
- Mass-spring System
Difference Between Computer Vision
- No clear boundaries
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