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迎新报告

迎新报告. 石剑. 2013 级博士 导师：陈彦云 方向：树木结构建模. 树木结构建模. 快速生成形似树木 模拟树木生长过程 渲染. 现有主流方法. L-System Sketch Image. L-System. variables  : X F constants  : + − [ ] start  : X rules  : ( X → F-[[X]+X]+F[+FX]-X), ( F → FF) angle  : 25°

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迎新报告

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  1. 迎新报告 石剑

  2. 2013级博士 • 导师：陈彦云 • 方向：树木结构建模

  3. 树木结构建模 • 快速生成形似树木 • 模拟树木生长过程 • 渲染

  4. 现有主流方法 • L-System • Sketch • Image

  5. L-System • variables : X F • constants : + − [ ] • start : X • rules : • (X → F-[[X]+X]+F[+FX]-X), • (F → FF) • angle : 25° • Here, F means "draw forward", - means "turn left 25°", and + means "turn right 25°". X does not correspond to any drawing action and is used to control the evolution of the curve. [ corresponds to saving the current values for position and angle, which are restored when the corresponding ] is executed.

  6. 植物学常识 • 植物（plants） • 草本植物（herbaceous plants） • 木本植物（woody plants） • 树（tree） • 灌木（shrub）

  7. 树结构模型生成 • 数据驱动（data-driven）的方法 • 通过对已有模型的参数的统计分析来指导新的模型生成 • 面临的问题 • 参数之间的依赖关系 • 约束规则及外部条件

  8. 树木生长模拟 • 对芽（bud）活动的模拟 • state machine • 对节和节间的生长模拟 • growth function

  9. 参考资料 • Wikipedia • 《The Algorithmic Beauty of Plants》 • 《植物学》

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