There is a serious bug in the IPO/python interface that
makes it impossible to change existing points in an IPO
curve.

Here is the example code- to test it just select an
object with some IPO's
Notice that even though the point is changed it still
returns its old value- whatever that is.
I have tried updating/redrawing/recalcing the IPO
inbetween setting the new value and nothing changes.


import Blender
from Blender import Object, Ipo
sel=Object.GetSelected()
sel[0].getIpo().getCurves()[0].bezierPoints[0].pt[1] = 0
print sel[0].getIpo().getCurves()[0].bezierPoints[0].pt[1]

Ipo.Recalc(sel[0].getIpo())
Blender.Scene.getCurrent().update()
Blender.Window.RedrawAll()

- Cam