Motions unpredictably depart from move positions


#1

A simple 3-position move results in unplanned behavior :

I turned on curve editor -

but was unable to make any modifications to the displayed curves. In the past, even flattening the curves would only minimize the effect, not eliminate it.

ANY Suggestions ?

Thanks -

C.


(Marika Almgren) #2

The tweening is probably set to Cardinal spline, which tries to smooth out the movement.
If you change the tweening to Linear it should give you the desired result.


#3

Yeah, except that Linear helps, but does NOT eliminate the problem, as it calculates from start point to end-point with the intermediate point simply a pause along the way.

The TRUE solution would be simple point-to-point calculations, allowing the user to accelerate and decelerate at the intermediate points if the pre-calculated start and stop point softening accelerations aren’t sufficient, you know, something like we had in BO-1, that we lost in BO-2, leading to not being able to precisely time starts and stops at specific points. But then in BO-1, we were only able to set “all” motion accelerations to zero, and other accelerations would have to be set one at a time. Tedious, but we could find a stop-point. decelerate to it, and even if different components decelerated to a specific point in space at different rates, they all STOPPED at the SAME PLACE at the SAME TIME , THEN moved on as needed timed EXACTLY WHEN NEEDED. See example provided above.

Thanks for trying. I really do appreciate it.

-C.


(Marika Almgren) #4

Can you please send me an example model showing that Linear tweening doesn’t work?

I just made your example animation in Bongo 2 and I get this result:

The animation on the left is using Cardinal Spline and the one on the right is Linear Tweening.