TD必读：平行传递法则

Curve framing is important for a lot of things, like trajectories, creating geometry from curves or aligning copied geometry to curves. In this tutorial Manuel implements the parallel transport algorithm that transports an initial normal vector along a curve to create a smoothly varying frame. But be warned. This video is very VEX heavy.

In this tutorial you’ll learn how to read a scientific paper and translate it’s content to Houdini.

使用曲线构建几何体是TD必须掌握的技能，例如类轨道模型、将复制的模型赋予到曲线上等。这个教程将详细解释平行传递法则——沿曲线传递原始的法线向量来创建一个平滑的多变的几何体。不过提醒一下，这个视频包含大量VEX知识。

这个教程你将阅读一篇科学文献，并根据它创建我们的几何体。