9b743d2a43
# Objective *Fixes #5670 as an opt-in for now* glTF uses the following coordinate system: - forward: Z - up: Y - right: -X and Bevy uses: - forward: -Z - up: Y - right: X For the longest time, Bevy has simply ignored this distinction. That caused issues when working across programs, as most software respects the glTF coordinate system when importing and exporting glTFs. Your scene might have looked correct in Blender, Maya, TrenchBroom, etc. but everything would be flipped when importing it into Bevy! ## Solution Add an option to the glTF loader to perform coordinate conversion. Note that this makes a distinction in the camera nodes, as glTF uses a different coordinate system for them. ## Follow Ups - Add global glTF loader settings, similar to the image loader, so that users can make third-party crates also load their glTFs with corrected coordinates - Decide on a migration strategy to make this the future default - Create an issue - Get feedback from Patrick Walton and Cart (not pinging them here to not spam them) - Include this pic for reference of how Blender assumes -Y as forward:  ## Testing I ran all glTF animation examples with the new setting enabled to validate that they look the same, just flipped. Also got a nice test scene from Chris that includes a camera inside the glTF. Thanks @ChristopherBiscardi! Blender (-Y forward):  Bevy (-Z forward, but the model looks the wrong way):  Bevy with `convert_coordinates` enabled (-Z forward):  Validation that the axes are correct with F3D's glTF viewer (+Z forward):  |
||
|---|---|---|
| .. | ||
| migration-guides | ||
| release-notes | ||
| migration_guides_template.md | ||
| migration_guides.md | ||
| README.md | ||
| release_notes_template.md | ||
| release_notes.md | ||
Release Content
This directory contains drafts of documentation for the current development cycle, which will be published to the website during the next release. You can find more information in the release notes and migration guides files.