Evan Robinson

I know this is late, but I found out what causes this. I had the exact same issue. It's because the vellum rest blend is changing data on the constraints made by the pin constraints. The solution that kevin posted is probably the way you want to go. But I am attaching this example that fixes the issue/proves that the rest blend is messing up the pin constraints.

If you look at my attached hip and the photo, I limited the constraint group to only affect the distance and bend constraints (on the vellum rest blend dop node). This prevents any other constraints like the pin constraints from being affected. On the pin constraints, you can set orientation to none, that only affects hair. lower the stiffness amount. Then you will see it is now working. However, I would still use the method that kevin provided for this instance. However, the example I provided may be better in other scenarios (like the shot I am currently working on).

hope this helps someone else in the future.

tamte

evanrudefx
It's a bit odd trying to get the timing right, but I can work it out.

it's all about the values, if you look at the example, it's using chf() mostly because for me it's easier since the frame numbers are visible

the example remap curve goes from -2f to 2f
meaning that as the box1/tx value goes between -2 and 2 the sphere1/ty follows the remap curve value
so it's all about remapping values, nothing to do with the actual frames or time

Thanks. In my test I just chose some arbitrary range for my keyframes. 1-7 (just to see if I could get it working at any value). I took the translate x of the box and fit it to the range of the keyframes. So when the box made it to a value of 4 in x, the sphere will also evaluate at frame 7 which is the final frame. It definitely makes sense. Definitely more control here but definitely easier in maya. When I said timing, I more so meant remapping the ranges to get the right animation timing.

tamte

evanrudefx
But that wouldn't work with the animation editor, right?

it will, but maybe the descriptions was not clear enough, you want to drive te frame or time argument with your box tx value, not with $FF

here is an example set up as described

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Oh thanks! I knew I was missing something! It's a bit odd trying to get the timing right, but I can work it out.

Thanks!