I am trying to create a bounding box mesh that updates its bounding box whenever it receives a new child mesh so that the bounding box includes all the children meshes. I am finding this hard to do with the typical observers and functions because onAfterWorldMatrixUpdate will trigger when you call g…

You could detect reentrancy like this: Babylon.js Playground Babylon.js playground is a live editor for Babylon.js WebGL 3D scenes But it won’t work in your case because onAfterWorldMatrixUpdateObservable is called on the container before the parent propert…

Indeed it seems that it forces computing the world matrix to be sure we are up to date. [image] @Evgeni_Popov can you think of anything ?

Thanks! that works great! I created a PR to update the bounding box documentation to include this method and these examples. Update displayBoundingBoxes.md drawing bounding box documentation with getHierarchyBoundingVectors() example …

There is a strange behavior with this approach where if you move the parent mesh the bounding box seems to drift from the child meshes, not sure whats causing this. Babylon.js Playground Babylon.js playground is a live editor for Babylon.js WebGL 3D scenes

getHierarchyBoundingVectors returns the values in word space, while BoundingInfo expects min/max in local space: Babylon.js Playground Babylon.js playground is a live editor for Babylon.js WebGL 3D scenes

Update Parent Bounding Box On Child Added

Questions

dsaffo February 22, 2024, 3:19pm 5

Thanks! that works great!

I created a PR to update the bounding box documentation to include this method and these examples.

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Best Way to get the True Extends of a Mesh?

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Update Parent Bounding Box On Child Added

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