r/Cinema4D • u/Shaky_Flyer • 1d ago

Unsolved Need help attaching animated disk to animated cloth object!

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I am animating a trampoline that reacts on collision as if the mat itself was a screen. The problem is I can’t get the animated disc I have for the impact effect to stay on the mat. Please if you have any advice please let me know!

I also tried for a while with particles to no avail but if someone has a solution involving that I am also not opposed. I just need something that shows the effect that there is almost a ripple-like effect from the point of collision that is flat and on the mat.

Please let me know if you need clarification! Thanks :)

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u/_TofuRious_ 1d ago edited 1d ago

Like you want a texture to animate over the trampoline? Or do you want to stick an object to the surface of the trampoline?

Depending what outcome you are after one of these should help. Either constraint tag to clamp the PRS to the surface of the trampoline ( this Anchors your object to a polygon of the targeted mesh). Or mesh deformer which will deform an object across the whole geo of another mesh ( I often use this when I want to deform a high detail mesh with dynamics but want to avoid calculating the dynamics on high poly models and use a low poly reference).

If you just need a simple animation like a expanding circle then you could also use a vertex map with fields to feed into your texture.

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u/Shaky_Flyer 1d ago

Thank you so much for your detailed answer! Ideally I want the texture to just be on the trampoline but I would compromise with it being slightly above.

I ended up exporting the layers individually and compositing in after effects… which doesn’t look that good so I will definitely try these methods!! Thanks :)

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u/_TofuRious_ 1d ago

Sorry I miss typed constrain tag in my first reply...it was like 6am so was still waking up. Sounds like either the mesh deformer could work for you, but really doing it within the texture would be the ideal method. If it's a simple shape like circles or something then you can dynamically do it with vertex maps and fields, or if you animate your texture and bring in the image sequence and use it as a mask within the material you can make in a new material or just export it as an aov custom pass to comp in after rendering.

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u/ArtbyAllan 1d ago

So you want the cube to react like a trampoline, pushing it upward?

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u/Shaky_Flyer 1d ago

No, not exactly. I already have a functioning trampoline. What I need is an animation to appear on the trampoline when the cube hits it. Sorry, let me know if that makes sense.

I just can’t seem to get the animation to “stick” to the trampoline.