Path(2)之verp中path position和path length的区别

主要的内容来自官方文档，但是觉得自己可能有理解不到位的地方，以后也许需要再次修改。

1.path position

Along a path object, an intrinsic position can be defined. That position, also referred to as path position, is
different from the position of a path object. While the position of a path object is the position of the path
object origin point (which is shown as a white wireframe cube when the path is selected), the path position

or rather intrinsic path position is a position value along the path as can be seen in following figure:

2. path length

疑惑、猜测：

path position和path length  应该有点类似，看起来好像是一个东西，至少从数值上看起来是一样的。