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前言

本文分享VTK样例IterateOverLine，讲解如何遍历线，希望对各位小伙伴有所帮助！

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1. IterateOverLine

There are 4 lines.
Line has 2 points.
0 1
Line has 2 points.
1 2
Line has 2 points.
2 3
Line has 2 points.
3 4

  该样例阐述如何遍历线段，点和Cell也是同样的遍历方法。

    double origin[3] = { 0.0, 0.0, 0.0 };double p0[3] = { 1.0, 0.0, 0.0 };double p