kwsch
commented
2 years ago Looks like the out-of-bounds check is performed prior to acknowledging the swapping of width & height: https://github.com/kwsch/NHSE/blob/3e7bacb80b725679fecd715d6a73b9dfe994a934/NHSE.Core/Structures/Map/Layers/ItemLayer.cs#L118-L134
If the original item is 3x2 for example, if you try and rotate the item using flag0=1 it's still not possible to place the item on the edge of the map, it still acts as if the item is 3 in length and requires a space at the edge of the map.
Please see below image, top placed item is flag0=0, works fine. Second placed item is flag0=1, placed as far to the right as it allows it. Ideally it would be placed on the square with the arrow but it's not possible.