Model3D right-handed coordinate system

[dylanebert]

Description

Revise Canvas3D viewer to use a right-handed coordinate system, leading to fewer confusing or unexpected results for researchers.

Closes: #8375

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[gradio-pr-bot]

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Install Gradio from this PR

pip install https://gradio-builds.s3.amazonaws.com/df42945d8644d7c0ca1ed612cb1617242705df0e/gradio-4.31.5-py3-none-any.whl

Install Gradio Python Client from this PR

pip install "gradio-client @ git+https://github.com/gradio-app/gradio@df42945d8644d7c0ca1ed612cb1617242705df0e#subdirectory=client/python"

Install Gradio JS Client from this PR

npm install https://gradio-builds.s3.amazonaws.com/df42945d8644d7c0ca1ed612cb1617242705df0e/gradio-client-0.19.4.tgz

[gradio-pr-bot]

🦄 change detected

This Pull Request includes changes to the following packages.

Package	Version
@gradio/model3d	patch
gradio	patch

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With the following changelog entry.

Model3D right-handed coordinate system

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[dylanebert]

For more context, this isn't a bug, but many researchers perceive it as a bug, such as in InstantMesh.

Another option is to allow changing the coordinate system in the viewer, but this may also be confusing. For simplicity, a right-handed coordinate system should lead to the least confusion for users :)

Some additional context here: forum

[dawoodkhan82]

@dylanebert

Quick question about InstantMesh:

Note: Downloaded .obj model will be flipped. Export .glb instead or manually flip it before usage.

Will this PR fix this issue in their space? Why does it affect the obj and glb files differently if so?