Unity Issue Tracker - Broken mouse pointer input coordinates in GraphicRaycaster for certain window sizes in Build when run in windowed mode

Fixed

Fixed in 2020.3.39f1, 2021.3.9f1, 2022.1.15f1, 2022.2.0b7, 2023.1.0a6

Votes

16

Found in

2020.3.36f1

2021.3.6f1

2022.1.8f1

2022.2.0a19

2023.1.0a2

Issue ID

UUM-7893

Regression

Yes

Broken mouse pointer input coordinates in GraphicRaycaster for certain window sizes in Build when run in windowed mode

Jul 04, 2022

How to reproduce:
1. Open the attached project "CanvasBrokenRaycastRepro.zip"
2. Open Assets/Launch.unity
3. Build And Run the project
4. Increase the width of the Player window so that it's more than double the height of the window
5. Hover over to any of the rightmost "Button" with the mouse

Expected results: The "Button" which the mouse is hovering over is highlighted
Actual results: The "Button" which the mouse is hovering over is not highlighted

Reproducible with: 2020.3.36f1, 2021.3.6f1, 2022.1.8f1, 2022.2.0a19, 2023.1.0a2

Reproducible on: Windows 10

karl_jones

Jul 21, 2022

A fix is on the way. You can work around the issue now by moving the UGUI package from the PackageCache folder into the projects Packages folder. Then replace the file MyProject\Packages\com.unity.ugui\Runtime\UI\Core\MultipleDisplayUtilities.cs with this one https://gist.github.com/karljj1/e333a7a3f192a5d264d95bfbaff0fde8

Comments (2)

Darren-R

Oct 13, 2023 15:50

I have just encountered this bug in 2019.4.40f1 LTS (latest) It was NOT an issue in 2019.4.16f1 LTS.
kappel_unity

Nov 03, 2022 16:52

I am also hitting this bug in 2020.3.38f1, and removed UGUI from the project via package manager before importing the package to the project.

However, after updating MultipleDisplayUtilities.cs I am still seeing incorrect raycasting on various windowed display resolutions/aspect ratios.

Have I applied the fix incorrectly? Are there more detailed instructions on how to apply this fix properly?

Thank you!

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