如何在数据点上创建 3D 多边形/网格? [英] How do I create a 3D polygon/mesh over data points?

问题描述

我有一个数据点数组，Points = [X,Y,Z]，其中 X,Y &Z 是 n-by-1 向量.x、y 和 z 值是黑盒的结果.

I have an array of data points, Points = [X,Y,Z], where X,Y & Z are n-by-1 vectors. The x, y and z values are the result of a blackbox.

以下是这些点的示例:

^{图.3D 点}

我想生成如下所示的内容:

I want to generate something that looks like this:

^{图.网格绘制}

如果你画不出来，它就像一个变形的圆柱体.凸包不起作用，因为几何中存在会被忽略的凹陷.

If you can't make the drawing out, it's something like a deformed cylinder. A convex hull does not work because there are dips in the geometry that would be ignored.

推荐答案

我正在寻找的解决方案是 Matlab 中的 boundary 函数，它可以在点周围创建收缩包装".很难找到这个解决方案，因为虽然研究 &文献将其称为凹壳"，Matlab 将其称为非凸多边形"，因此对前者的搜索没有找到任何结果.网格物体

The solution I was looking for was the boundary function in Matlab which creates a "shrink wrap" around the points. It was hard to find this solution because while research & literature refers to this as a "Concave Hull", Matlab refers to it as "Nonconvex polygons" so searches for the former did not turn up anything. Meshed Object

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