[2.0.47] Smart belt building builds extra belts when bending in a certain way

[rocketshipbbq]

What happened?

20250604155015_1.jpg (191.28 KiB) Viewed 239 times

Bending belts in a specific way when smart belt building causes unexpected additional belts to be built.

What did you do?

Steps to reproduce:
1. Drag a straight line of belts forwards (up in this case)

20250604155010_1.jpg (171.09 KiB) Viewed 239 times

2. Without releasing the mouse, drag back along the belt (down in this case) and press "R"

20250604155012_1.jpg (171.77 KiB) Viewed 239 times

3. Drag to the side, which builds more belts than expected

20250604155015_1.jpg (191.28 KiB) Viewed 239 times

What did you expect to happen instead?

I'd only expect one sideways belt line to be built. IDK if it the bend should be at the end of the belt or where the cursor is, but in either case the extra belts probably shouldn't be built.

Some related issues I found when experimenting:
* If after pressing "R" you drag to the side very fast (I'm guessing multiple tiles in a tick) it'll build a disconnected belt instead:

20250604155028_1.jpg (203.4 KiB) Viewed 239 times

* When dragging backwards belts the bug doesn't seem to occur, it only seems to occur when dragging belts forwards. Below the same steps are performed but the initial belt is dragged backwards:

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20250604155054_1.jpg (171.46 KiB) Viewed 239 times

20250604155058_1.jpg (185.79 KiB) Viewed 239 times

This is on 2.0.47, no mods aside from Space Age.

[Loewchen]

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