In the following playground use WASD keys to navigate. Press 1 to open/close sliding door. Press 2 to open/close rotating door. You can also push the box by running into it. Box collisions are logged into console.log. https://playground.babylonjs.com/#4517EG#3 Problems: a) When sliding door op…

Thanks for bringing this to attention, it was indeed a bug in the way the cloning was done, it will be fixed by this PR: [Physics] Fix warning on copying a mesh with physics body by carolhmj · Pull Request #13951 · BabylonJS/Babylon.js (github.com) :slight_smile:

a): Unable to determine what creates the “copy of the door behind” b,c): If it wasn’t for parenting, it wouldn’t have moved, but I think this is a bug related to parenting. To unlock physics for movement, set disablePreStep to false, move it, and lock it again to get the physics that matches the …

What is the meaning of ‘a’ [image] I misjudged the collision to collision as harvok’s physics. anyway Since the physics assigned to the child are not assigned to the parent, in reality the position of the door is only the location of the parent and does not match the physics of the child. http…

Yeah, it’s just hiding the problem under the carpet. With such approach we have to leave all parents in (0,0,0) position, which is inconvenient. Also, it doesn’t work with rotating door. Also, it doesn’t work with more complex static objects, like these stairs: https://playground.babylonjs.com/#GZIE…

@splash27 I’ve done some changes in this PR: Gizmo, Physics fixes BabylonJS:master ← CedricGuillemet:fixHavokAndMisc opened 09:27AM - 09 May 23 UTC (UTC) […

Sorry, my initial playground had poor parenting setup for rotating door, that’s why some misplacement oddities happened. I just forgot to position both hinge and rotatingDoor into correct positions before parenting. https://playground.babylonjs.com/#4517EG#11 . But the problems didn’t go away. If …

@Cedric thank u for this great update. I think there is still a problem. If we don’t set position for the child mesh, it will automatically get the negative values of parent position, and it won’t be 0,0,0. Do you think is that an issue?

I’m listing all the various parenting cases this week and will continue dev with @carolhmj This is a complex subject that can give a lot of regressions if not done seriously. I’ll keep you posted.

Issue is still on our todo list. No update so far.

Havoc: problems with parented meshes

Bugs

Cedric May 9, 2023, 8:01am 5

I’m taking a look at that today.

Havok set position of physics body

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Havoc: problems with parented meshes

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