tile_set_index

This function can be used to set the tile index (the position of the tile within the tile set image) for a set of tile-data.

You give the tile-data, which can be retrieved using the function tilemap_get(), and then the integer value that represents the position of the tile (its index) within the tile set. The function will return a modified tile-data set which can then be applied using the tilemap_set() function.

Syntax:

tile_set_index(tiledata, index)

Returns:

Tile Data

Example:

var lay_id = layer_get_id("Tiles_sky");
var map_id = layer_tilemap_get_id(lay_id);
var mx = tilemap_get_cell_x_at_pixel(map_id, mouse_x, mouse_y);
var my = tilemap_get_cell_y_at_pixel(map_id, mouse_x, mouse_y);
var data = tilemap_get(map_id, mx, my);
var ind = tile_get_index(data);
data = tile_set_index(data, irandom(23));
tilemap_set(map_id, data, mx, my);

The above code gets the tile map ID from the given layer and then uses that to get the tile-data for the cell under the mouse position. This data is then used to set the tile index to a random number.