Hi team, There is a rotation offset bug with freecamera GLTF exports. The exported freecamera wrongly adds a rotation offset that is equal to its parent. Suppose freecamera.parent = tnode; If tnode.rotation.z = 90 degrees, the exported GLTF will ALSO have freecamera.rotation.z = 90 degrees. This…

cc @Guillaume_Pelletier and @bghgary

Hello, this is perfectly legit into GLTF camera documentation , where the camera might be attached to a node to define the orientation. But from Babylon Point of view, a camera is NOT a transform node When exporting, scene is defined as a node list using the following statement. const nodes: Node…

Yes, the thing is it’s not just BJS, Blender also imports the GLTF with the wrong rotation offsets in the exact same way So I think solving this issue (perhaps like you suggested KEEP_BABYLON_CAMERA_BEHAVIOUR in the export code) would be extremely useful for lots of people who use cameras in BJS

[image] Guillaume_Pelletier: Which is (as far i know) NOT the case into Babylon rendering. I don’t think this is right. If you change the transform of the parent of the camera, it moves the camera.

Is there going to be a PR for this :face_with_head_bandage:

@Guillaume_Pelletier Can you take another look?

I’m going to dig in this week, seems my first assumption were wrong and some stuff may be corrected with the camera export.

any updates on this PR? :slight_smile:

GLTF Export Bug: FreeCamera rotation has wrong offset

Bugs

Guillaume_Pelletier June 16, 2022, 5:46am 9

ya right…

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GLTF Export Bug: FreeCamera rotation has wrong offset

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