Help Needed: Sliding an object on a roller! - Cinema 4D R25

[alielsayid]

Hi everyone,

I'm trying to create a specific animation in Cinema 4D R25, and I'm running into some challenges. I’d appreciate any guidance you can offer!

Here's what I'm aiming for (see attached screenshot):
1. I have a fixed position roller (Red color) in space, and I want the (Blue) object to slide upward while touching the roller.
2. The (Blue) object should slide in such a way that it’s circumference is always in contact with the roller.
3. I’m trying to use the "Align to Spline" tag for this animation, but I'm having trouble getting the roller to stay fixed while move the (Blue) object only, and maintain consistent contact with the roller while sliding.

If anyone has suggestions, or if there’s an alternative setup that might work better, I’d love to hear it! Any tips or settings I might have missed would be really helpful.

Thanks in advance for any advice or insights!

[masterzone]

mmm interesting...I'm not able to help you but I think with a Rig is the best way to achieve the results...using Xpresso or something else you can go ahead...
Anyway...if you don't want to use Xpresso or Rigging tags as constraint method, you can use the Null system.

If you using a Null for the horizontal movement and a second null for vertical movement you can animate the first null when the blue object need to go to near the wheel, and after there you can animate the vertical null for the sliding movement...

I hope this helps...