Hi! I think that there is some bug in the mesh intersection detection if you change mesh pivotmaterix position. It works fine with Babylon 4.2.1 but with 5.0.0-beta.5 there are some problems. Here is a test scene that demonstrating the problem when dragging red box near walls. Gray helperbox should…

PR Fix matrix update with pointerDragBehavior and Pivot by CedricGuillemet · Pull Request #12100 · BabylonJS/Babylon.js · GitHub

Hey, i’ll look into that. Should be working correctly, of course :slight_smile:

Hi Jukka, I must be missing something fundamental… The playground you shared has nothing to do with collisions and has no walls. Is that the right playground?

You are absolutely right - my bad!!! :upside_down_face: I copy/paste the wrong playground link first, but now it’s updated. And i put it here also: https://playground.babylonjs.com/#LTWRV7

Oh I think it might be cause at the time of the drag event the pivot has been unset. Adding @Cedric to double check cause if I remember well there were some tricks lately to allow correct drag behavior and pivots ?

After moving the check to onBeforeRenderObservable and calling computeWorldMatrix before intersectsMesh, then it seems to be detecting the intersection correctly, in case that helps narrow the issue down more… :slight_smile: Babylon.js Playground Babylon.js playground is a live editor f…

This trick seems to work - thank you @Blake !

Hi! I would have asked if a final solution to this problem has yet been found? In the latest version v5.0.0-rc.0, the problem seems to still exist. @Blake 's example works as a workaround but I think that it doesn’t solve the exact bug?

Mesh intersection problem (v5.0.0-beta.5)

Bugs

Jukka January 31, 2022, 11:25pm 8

Yes you remember right, i had problems with PointerDragBehaviour/dragPlane when using Babylon 5.0.0-beta.4 but @Cedric fixed it and now it works correctly with 5.0.0-beta.5.

Topic		Replies	Views
PointerDragBehaviour / dragPlaneNormal problem with Babylon 5.0.0-beta.4 Bugs	3	461	January 26, 2022
Set origin of mesh (pivot matrix) - unexpected behavior in PointerDragBehavior Questions	3	735	September 4, 2020
Strange setPivotPoint issue Bugs pivot	2	121	March 22, 2024
Multiple Issues with Pivot-Setting Playground Questions	15	995	December 26, 2018
Havok: Strange behavior dragging with constraint Questions physics , pointerdragbehavior , havok	10	215	May 15, 2024

Mesh intersection problem (v5.0.0-beta.5)

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