Pharan wrote@[削除済み]
You just described what FFD is.
Locking points isn't a feature though. Not yet anyway. You just have to make sure you don't move the points you don't want to move.
I meant spatial interpolation, not temporal. If you have three adjacent points, A, B and C and you want A to be still and B and C to move, it seems to me you have to move B manually, even if it is the path of C that you really care about. If you could lock A (or even better, define the movement of A and lock it to THAT) and then move C with B just moving along, you would get more fluid and natural motion with less effort.
Like this:
Keyframe 1:
A
B
C
Move point C to the right, B moves along, in proportion:
Keyframe 2:
A
B
C
In this example there is no real point since you could just get rid of point B and get the same behaviour, but with 2d, more points and several choices for how the points should move together, it could make a big difference.
