行进的立方体？
我有一个由点组成的对象，比如说它的点云，我想从这些点渲染对象，我希望对象看起来像那些点包裹在一张纸中。我想对其进行动画处理，所以我首先想到的是行进立方体，但我的对象不会是球或立方体，它会变形，有没有比行进立方体更简单的方法？
I have an object made of points, lets say its point cloud, i want to render object from those points, i want object to look like those points were wrapped in a sheet of paper. I want to animate it, so first thing that came on my mind was marching cubes, but my object will not be a ball or cube, it will morph, is there any simpler approach than marching cubes?
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根据“包裹”的含义，3D 凸包可能会产生以下效果：想。
按照您想要的方式对顶点进行动画处理，并每次重新运行外壳算法。
Depending on what you mean by "wrapped" a 3D convex hull may produce the effect that you want.
Animate your vertices however you want and re-run the hull algorithm each time.
行进立方体算法似乎最适合您正在寻找的东西 - 并非所有点云都是凸的。由于查找表很大，该算法可能看起来很吓人，但实际上非常简单。我在以下位置发布了一个示例（使用 Three.js）：
http://stemkoski。 github.com/Three.js/Marching-Cubes.html
The Marching Cubes algorithm seems like the best fit to what you're looking for -- not all point clouds are convex. The algorithm may seem intimidating because of the large lookup table, but it is actually pretty straightforward. I have posted an example (using Three.js) at:
http://stemkoski.github.com/Three.js/Marching-Cubes.html