When using a 1.21.2 or newer client to connect to a 1.20.6 server, there is an issue with incorrect Y-axis rotation on displays. #1008
Description
'/viaversion dump' Output
https://dump.viaversion.com/fe954458f1a1edcf024eafc37f8ba2dbd5edbe4b52c9eb316af738e0dbfb77bb
Server/Client Error
none
Bug Description
In 1.21.2+ clients connected to a 1.20.6 server, adjusting the Y-axis rotation of item displays does not render correctly when the angle exceeds 90° or -90°. The rotation between 90°180° and -90°-180° fails to display properly.
Steps to Reproduce
Attempt to rotate an item display by setting its angle using the setPitch and setYaw methods from a regular entity (via this custom plugin: ModernShowcase.
Then observe the display angle using both a 1.20.6 client and a 1.21.2+ client.
Expected Behavior
On a 1.20.6 client, the item display renders as expected.
However, on a 1.21.2 or newer client, the display fails to show Y-axis rotations beyond ±90°, making 90°–180° and -90°–-180° rotations visually incorrect or absent.
1.20.6
https://github.com/user-attachments/assets/dff5d906-0760-4674-8545-42c6ceb22422
1.21.2
https://github.com/user-attachments/assets/4d1fbafc-ae98-4ebf-9893-7233b43b77cc
Additional Server Info
No response
Checklist
- Via plugins are only running on EITHER the backend servers (e.g. Paper) OR the proxy (e.g. Velocity), not on both.
- I have included a ViaVersion dump.
- If applicable, I have included a paste (not a screenshot) of the error.
- I have tried a build from https://ci.viaversion.com/ and the issue still persists.