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function tile_get_ids()

{

    var __tiles;

    __tiles[0] = -1;

    var __currtile = 0;

    var __layers = layer_get_all();

    var __numlayers = array_length_1d(__layers);

    for (var __i = 0; __i < __numlayers; __i++)

    {

        var __els = layer_get_all_elements(__layers[__i]);

        var __numels = array_length_1d(__els);

        for (var __j = 0; __j < __numels; __j++)

        {

            var __eltype = layer_get_element_type(__els[__j]);

            if (__eltype == 7)

            {

                __tiles[__currtile] = __els[__j];

                __currtile++;

            }

        }

    }

    return __tiles;

}