An atlas is a grid of tiles laid out on a texture. Each tile in the grid must be exposed using [method create_tile]. Those tiles are then indexed using their coordinates in the grid.
Each tile can also have a size in the grid coordinates, making it more or less cells in the atlas.
Alternatives version of a tile can be created using [method create_alternative_tile], which are then indexed using an alternative ID. The main tile (the one in the grid), is accessed with an alternative ID equal to 0.
Each tile alternate has a set of properties that is defined by the source's [TileSet] layers. Those properties are stored in a TileData object that can be accessed and modified using [method get_tile_data].
As TileData properties are stored directly in the TileSetAtlasSource resource, their properties might also be set using [code]TileSetAtlasSource.set("<coords_x>:<coords_y>/<alternative_id>/<tile_data_property>")[/code].
Creates an alternative tile for the tile at coords [code]atlas_coords[/code]. If [code]alternative_id_override[/code] is -1, give it an automatically generated unique ID, or assigns it the given ID otherwise.
Returns the new alternative identifier, or -1 if the alternative could not be created with a provided [code]alternative_id_override[/code].
Returns the atlas grid size, which depends on how many tiles can fit in the texture. It thus depends on the Texture's size, the atlas [code]margins[/code] the tiles' [code]texture_region_size[/code].
If [member use_texture_padding] is [code]false[/code], returns [member texture]. Otherwise, returns and internal [ImageTexture] created that includes the padding.
Returns the region of the tile at coordinates [code]atlas_coords[/code] for frame [code]frame[/code] inside the texture returned by [method get_runtime_texture].
[b]Note:[/b] If [member use_texture_padding] is [code]false[/code], returns the same as [method get_tile_texture_region].
Returns the sum of the sum of the frame durations of the tile at coordinates [code]atlas_coords[/code]. This value needs to be divided by the animation speed to get the actual animation loop duration.
If there is a tile covering the [code]atlas_coords[/code] coordinates, returns the top-left coordinates of the tile (thus its coordinate ID). Returns [code]Vector2i(-1, -1)[/code] otherwise.
Returns a tile's texture region in the atlas texture. For animated tiles, a [code]frame[/code] argument might be provided for the different frames of the animation.
Returns an array of tiles coordinates ID that will be automatically removed when modifying one or several of those properties: [code]texture[/code], [code]margins[/code], [code]separation[/code] or [code]texture_region_size[/code]. This can be used to undo changes that would have caused tiles data loss.
Returns whether there is enough room in an atlas to create/modify a tile with the given properties. If [code]ignored_tile[/code] is provided, act as is the given tile was not present in the atlas. This may be used when you want to modify a tile's properties.
Move the tile and its alternatives at the [code]atlas_coords[/code] coordinates to the [code]new_atlas_coords[/code] coordinates with the [code]new_size[/code] size. This functions will fail if a tile is already present in the given area.
If [code]new_atlas_coords[/code] is [code]Vector2i(-1, -1)[/code], keeps the tile's coordinates. If [code]new_size[/code] is [code]Vector2i(-1, -1)[/code], keeps the tile's size.
Sets the number of columns in the animation layout of the tile at coordinates [code]atlas_coords[/code]. If set to 0, then the different frames of the animation are laid out as a single horizontal line in the atlas.
If [code]true[/code], generates an internal texture with an additional one pixel padding around each tile. Texture padding avoids a common artifact where lines appear between tiles.
Disabling this setting might lead a small performance improvement, as generating the internal texture requires both memory and processing time when the TileSetAtlasSource resource is modified.
