I had some problems with path_spline()
It need a distance parameter to calculate the position on the spline and the distance is not the real distance on the curve.
From manual:
The dist parameter corresponds to the distances of straight lines connecting the nodes, and not to the real distance of the curve. Thus, when adding a constant speed to the dist parameter, the real speed along the curve can vary. It is the faster the more the curve deviates from the straight lines between the nodes. If this is undesired, place more nodes to avoid deviations at sharp bends in the path.
Its the same problem, the speed vary.
I dont know how can I solve my problem with path_spline
and c_move.
Do you have another idea?