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I'm still confused with Physic and Constraints. I'd like to have two bodies - connected together by hinge (let say vertical beam on a platform , connected to horizontal beam). I'd like to move the platform from one place to another, keeping vertical beam on top, and have hinges working). I've tried hook modifier, a few constraints - but it does not work somehow. Either vertical beam follows the platform and hinge stop working, or hinge is working and beam does not follow the platform. I animate platform (with keyframes) and move it from one place to another.

Frame 1:

enter image description here

Frame 2: enter image description here

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  • $\begingroup$ can you pls show us (either by a video link or a gif or a sketch) how the animation should look like? what parts should move and how? $\endgroup$
    – Chris
    Jun 22, 2022 at 13:47
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    $\begingroup$ I edited the question, adding frame1 and frame2 $\endgroup$
    – Larumis
    Jun 22, 2022 at 13:53

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The hinge "empty" must look like this (orientation is very important for hinge):

enter image description here

I animated the block that you can see, the hinge works.

Blend file:

Result:

enter image description here

You can quickly create a hinge by selecting the two objects, then "object" -> rigid body -> connect. Then correct the empties rotation and position (if necessary).

enter image description here

here an example where the platform itself is animated:

enter image description here

in that case you have to keyframe the "animated" checkbox and of course the location of the platform.

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  • $\begingroup$ Awesome, thank you. However, I see that you are pushing this by another passive block. Can you have the platform at the bottom animated, or does the whole block (platform + two beams) have to follow physic only? $\endgroup$
    – Larumis
    Jun 22, 2022 at 14:07
  • $\begingroup$ of course you can animate the platform it by its own. $\endgroup$
    – Chris
    Jun 22, 2022 at 14:08
  • $\begingroup$ i updated my answer. If my answer helped you, please click on the checkmark left of my answer. thank you. $\endgroup$
    – Chris
    Jun 22, 2022 at 14:10
  • $\begingroup$ Cool, so it's all about having second empty with correct orientation. Thank you $\endgroup$
    – Larumis
    Jun 22, 2022 at 14:49
  • $\begingroup$ You are welcome $\endgroup$
    – Chris
    Jun 22, 2022 at 14:49

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