Center of model changing

[dennis-modelsend]

Center of model changing

[donmccurdy]

@dennis-modelsend could you expand on what you mean by "load this model through gltf-transform"? Do you mean simply read/write without changes? Testing that on the CLI:

gltf-transform cp input.glb output.glb

The scene has the same bounds before and after:

#	name	rootName	bboxMin	bboxMax
0	Sketchfab_Scene	Sketchfab_model	-47.82007, -47.82007, -79.41164	47.82007, 47.82007, -1.26045

#	name	rootName	bboxMin	bboxMax
0	Sketchfab_Scene	Sketchfab_model	-47.82007, -47.82007, -79.41164	47.82007, 47.82007, -1.26045

To investigate this I'll need to be able to reproduce it, and knowing the version of glTF Transform used, and complete steps to reproduce, would be helpful.

[dennis-modelsend]

@donmccurdy I use threejs FileLoader then use @gltf-transform/core WebIO.readBinary and writeBinary without any transforms

[dennis-modelsend]

Using 4.0.0-alpha.8

[donmccurdy]

@dennis-modelsend I've had a quick go at this, and I'm not immediately able to reproduce any issue. If you can share full reproduction steps — a demo, or complete code — I can investigate further. I'm happy to spend time investigating the bug, but would prefer not to spend time guessing what your code looks like. Occasionally, the cause of a bug can be something as non-obvious as the bundler configuration.

[dennis-modelsend]

Found the issue while writing the demo, I was only calling updateMatrixWorld on only one of the objects ... thank you for the help Don

[donmccurdy]

@dennis-modelsend ah sorry, that's the least fun kind of bug! Note that THREE.GLTFLoader in r163 will start doing updateMatrixWorld automatically before returning the scene:

• mrdoob/three.js#27877