Map scrolling does not work in vertical axis when aspect ratio is portrait

[tintinhamans]

Area(s) with this issue?

This is a development issue, The bug also exists in the Zero Hour Expansion Pack, The bug also exists in the original C&C Generals (Not Zero Hour)

Describe the issue

When setting the game to a portrait resolution, you are only able to scroll the map in x axis; y axis seems to be bugged. The only way to scroll the map in such cases is to first rotate the map using MMB then scrolling left-right again.

For certain monitor configurations this is problematic, i.e. owners of LG DualUp.

Workaround is to play windowed mode on only portion of the monitor.

1:1 aspect ratio works, but anything portrait e.g. 1023x1024 breaks.

Steps to reproduce

1. Set the game to portrait resolution (e.g. 1080x1920, 720x1280)
2. Launch a match and observe scrolling behavior

Attachments

2025-03-14_17-59-14.mp4

[xezon]

Can you test this without GenTool?

[tintinhamans]

Can you test this without GenTool?

2025-03-28_21-12-24.mp4

Has some rendering issues without GenTool as you might expect but mouse scrolling behavior issue is still present.

[edbird]

Related to this, map scrolling (with the mouse via screen edges) also does not work on multi monitor setups.