public void ApplyTo(Sidedef s)
{
s.ClearFlags();
foreach (var group in Flags)
{
s.SetFlag(group.Key, group.Value);
}
s.OffsetX = OffsetX;
s.OffsetY = OffsetY;
s.RepeatX = RepeatX;
s.RepeatY = RepeatY;
s.TileIndex = TileIndex;
s.MaskedTileIndex = MaskedTileIndex;
s.Shade = Shade;
s.PaletteIndex = PaletteIndex;
s.HiTag = HiTag;
s.LoTag = LoTag;
s.Extra = Extra;
}