什么是图形学?

图形学：使用计算机合成和操作视觉信息。

为什么学习计算机图形学

应用

Video Games

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从技术上看画面是不是足够好，就是看其够不够亮。

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风格化渲染

Movies

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特效

动画

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设计

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可视化

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虚拟现实

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增强现实

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模拟

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基本知识的挑战

  • Creates and interacts with realistic virtual world

  • Requires understanding of all aspects of physical world

  • New computing methods, displays, technologies

技术挑战

  • Math of (perspective) projections, curves, surfaces

  • Physics of lighting and shading

  • Representing / operating shapes in 3D

  • Animation / simulation

课程主旨

  • Rasterization

  • Curves and Meshes（曲线和网格）

  • Ray Tracing

  • Animation / Simulation

Rasterization

  • Project geometry primitives (3D triangles/polygons) onto the screen

  • Break projected primitives into fragments(pixels)

  • Gold standard in Video Games (Real-time Applications)

三维空间的几何形体显式在屏幕上，这就是光栅化。实时计算机图形学，每秒能生成 30 幅画面，30 fps，否则是离线计算机图形学。

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Curves and Meshes

  • How to represent geometry in Computer Graphics

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Ray Tracing

  • Shoot rays from camera though each pixel

    • Calculate intersection and shading

    • Continue to bounce the rays till they hit light sources

  • Gold standard in Animations / Movies (Offline Applications)

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Animation / Simulation

  • Key frame Animation

  • Mass-spring System