Rotated tiles have incorrect coordinates

[zommerfelds]

pytmx tries to be smart and "fix" Tiled's weird coordinate choices (rectangle origin is top-left, where tiles are bottom-left):

pytmx/pytmx/pytmx.py

Line 632 in 7af805b

o.y -= o.height

However, this does not take into account that a tile can be rotated. In this case it breaks the position completely. To work around I had to add object.height to every tile position and subtract tile height for each tile collider shape.

It would be nice if pytmx would fix the coordinate taking into account rotation. This should be an easy fix and I can give it a shot if you are interested.

[zommerfelds]

Made some minor edits to fix self referecences:

        # iterate through tile objects and handle the image
        for o in [o for o in self.objects if o.gid]:
            # Decode rotation and flipping flags from the GID
            gid, flags = decode_gid(o.gid)
            rotation = self.get_rotation_from_flags(flags)  # Get rotation based on flags

            # Retrieve tile properties
            p = self.get_tile_properties_by_gid(gid)
            if p:
                for key in p:
                    o.properties.setdefault(key, p[key])

            # Adjust based on rotation
            if rotation == 90:
                o.x, o.y = o.x + o.height, o.y
            elif rotation == 180:
                o.x, o.y = o.x + o.width, o.y + o.height
            elif rotation == 270:
                o.x, o.y = o.x, o.y + o.width

            # Adjust Y-coordinate if invert_y is enabled
            if self.invert_y:
                o.y -= o.height


        self.reload_images()
        return self
    
    def get_rotation_from_flags(self, flags: TileFlags) -> int:
        """Determine the rotation angle from TileFlags."""
        if flags.flipped_diagonally:
            if flags.flipped_horizontally and not flags.flipped_vertically:
                return 90
            elif flags.flipped_horizontally and flags.flipped_vertically:
                return 180
            elif not flags.flipped_horizontally and flags.flipped_vertically:
                return 270
        return 0

However, note that I'm using actually continuous angles, like 31 degrees. So this code won't work for that scenario.

[JaskRendix]

@zommerfelds ok buddy, I'm going to delete my reply

[zommerfelds]

Haha @JaskRendix no need to delete :) Probably still useful for someone out there.

Ah and forgot to say, hi from Berne ;)

[pnearing]

Hey, I've added this to the expanded object in my fork of pytmx, hope this helps.

[pnearing]

Actually I decided to release the fork on pypi, you can download it as pytmx-ng, I left the import name the same so you can use it as a drop in replacement.
Hope you get use of it.