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I want to create in blender an animation similar with this one: enter image description here

I am wondering how could I do and if it possible to interact with rigid body objects? Who can help me, please ... thank you!

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The object could be a simple (say) Bezier curve, with a Bevel Object (another curve) assigned to it in its Properties > Geometry panel.

The 'Tilt' property of individual control points on a Bezier curve is keyable:

enter image description here

So just right-click it to set keyframes appropriately.. if you want a loop, set first and last keys to be visually identical, and go into the property's f-Curve, hit T, and ensure that the interpolation between the keys is 'Linear'.

enter image description here

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    $\begingroup$ or, to make a loop you can just tilt 10° or whatever, then, in the Dopesheet or Graph Editor, shift E > Linear Extrapolation $\endgroup$ – moonboots May 3 at 8:24
  • $\begingroup$ I am wondering if it is possible to make it dynamic rigid body animated, to interact with other objects? $\endgroup$ – diniulian May 3 at 8:53
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    $\begingroup$ @diniulian I'm pretty sure that would work, if instead of a pure curve, you used a star-prism mesh with a curve modifier.. you could still animate the twist on the modifier's target curve. But I can't make that an answer until I've checked it.. I'll let you know, if you don't get there first. Perhaps to get good exposure, that should be another question? $\endgroup$ – Robin Betts May 3 at 9:20
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    $\begingroup$ @diniulian No Luck :( in 279 I have not so far managed to get Physics to recognize the Curve modifier, despite collisions being set to 'Final', which should take all modifiers into account and even the curve being explicitly included in the Physics World group It could still be me.. maybe this would be worth another question. $\endgroup$ – Robin Betts May 3 at 13:53
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    $\begingroup$ @diniulian please make a new question for the rigid body part. That was not part of the original question. Don't make the Comments section a new "thread". This is not a forum, but a question and answer site. Help us keep things organized, and help other users access the information in an easier way. $\endgroup$ – cegaton May 3 at 16:18

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