Wanted

[Syclone1]

Did that script work well? I don't think it would be too hard to link an on screen slider to a rotational value over time. Then just animate the slider value. I do similar work to you but generally don't have to worry about rotational speed changes.

Still looking for a more user friendly solution but so far using reaction manager to rotate the object and a long slider to control the speed is still quite laborious as I have about 9000 combined frames now to animate over but it is 'technically' working at the moment.

If there are any script gurus out there that can make a easier rotation script/plugin I would be more than happy to pay for your time if it works

[YoyoBoy]

In recent years I've tried and failed to find a script-based solution to this problem as well. I wonder if something like the Mad Car plugin could be used to do it.

[Syclone1]

I checked out MadCar but I don't think it will accomplish what I need.

[dans]

The underlying problem is that you want to define a change in orientation instead of an absolute position/orientation the object has at a specific time (which is what you usually do with keyframes). So like with a particle system, to know what the object looks like e.g. on frame 123 - the complete history of all the RPM values from frame 0 up to the current frame need to be taken into account. So not rocket science - just a conceptual problem.

Daniel

[Ihno]

Jea, it would be possible with some kind of simulation approach. Something that works like mass fx, with a bake and an unbake button.
One'd just need to calculate how many degrees per frame given RPM value would add and then add that to the current degrees.
That only works in one direction so you'd need to bake the resulting animation. Making an MCG for that would be super easy.
But its not quite user-friendly without an unbake button. You'd need to re add and re animate the controller every time you'd want to change a thing.
I think one could make such button with max script.
Putting the controller in a list controller with 0 influence before collapsing and digging it back up on unbake. Or something like that... but I can't code that unfortunately.

[Syclone1]

Someone just posted a possible workaround on my post on the AD Area and going to give that a shot. I did post there a sample scene of what Im trying to achieve if you want to have a look at it...

https://forums.autodesk.com/t5/3ds-m...r/td-p/7084589

-dave