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SDF accelerate trace
2022-04-22 20:52:00 【DBBH】
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sdf全名 signed distance field
sdf代表的信息是什么，是当前点在表面的内部还是外部，存储的值分两部分，正负决定内外，数值就是距离
如果你具备了sdf信息，可以做这个事情
你现在ray到红点了，拿到红点的距离，可以直接一步跨到红点所在大圆的边上，然后这个新的点拿到他的距离，就又是一大步，这样对于光线来说，加速还是相当明显的
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本文为[DBBH]所创，转载请带上原文链接，感谢
https://dbbh666.blog.csdn.net/article/details/124303458
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