Curve deviation of 2 identical curves (with 3 elements the same)

Rhino
1

Hello,
I did a stupid test:

  1. draw 2 connected control point curves placing control pts in random position
  2. Delete the point that connected them.
  3. draw another control point curve with point snap to follow the control points of the previous curve
  4. check crv deviation, and there is deviation. The question here is: why I cannot “redraw” the same curve with the same point count, same curve degree and same point positions? What are the hidden elements inside them to make the difference shape?

Curve deviation
Curve deviation1205×441 78 KB

2

Hi VinPo -

You can run What on both to see the difference.
-wim

3

Thanks, it tells me the curve that i deleted a control point becomes knots non-uniform so I cannot draw the same curve by placing same position of control points.