layer_sprite_exists

You can use this function to check and see if a sprite element exists on any given layer. You supply the layer ID (which you get when you create the layer using layer_create()) or the layer name (as a string - this will have a performance impact) and the sprite element ID (which you get when you create a sprite element using layer_sprite_create() or when you use the function layer_sprite_get_id()) and the function will return either true if the element exists, or false if it does not.

NOTE This function works within the scope of the current target room - by default the room in which the function is called - which can be set using the function layer_set_target_room().

Syntax:

layer_sprite_exists(layer_id, sprite_element_id)

Returns:

Boolean

Example:

var lay_id = layer_get_id("Asset_Trees");
if (layer_sprite_exists(lay_id, global.TreesSprites))
{
    layer_sprite_destroy(lay_id, global.TreesSprites);
}

The above code checks the layer "Asset_trees" to see if the given sprite element exists and if it does, then it is destroyed (but not the layer).