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Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)

分类: 文章 • 2024-06-07 21:15:28

L16 Ray Tracing 4(Monte Carlo Path Tracing)

Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
蒙特卡洛积分
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
写不出解析式的时候如何算出定积分
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
路径追踪
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
WS对于雾面是不正确的
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
只要是定积分就可以用蒙特卡洛方法做
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
直接光照算法就得出了
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
如果打到物体就调用自身
问题：
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
光线数量指数爆炸
N可以取1就不会产生指数爆炸
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
问题：缺少递归的边界条件
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
以一定的概率停止追踪
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
最后期望仍然是L0
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
采样率低的时候会有噪声
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
有许多光线（打不到光源）被浪费了
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
因此不再向四面八方采样，专门向光源采样
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
来自光源可对光源直接采样
非直接光照仍然采用前面的方法
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
问题：光源与物体中间有物体遮挡
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
本课覆盖不到的内容：
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)
Games101计算机图形学笔记L16 Ray Tracing 4(Monte Carlo Path Tracing)

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