Problem it solves

You want to show a warning on the screen when the player is walking toward the edge of the world where no more rooms exist.

What this block does

Returns true if an adjacent tilemap exists in the given direction from the current room, or false if the player has reached the outer boundary.

The block

Block ID: overworld_mapExistsInDirection

Parameters

Returns

boolean — true if a map exists in that direction; otherwise false.

Example

if (!overworld.mapExistsInDirection(CollisionDirection.Right)) {
    game.splash("End of the world!")
}

Add the extension

Add github:riknoll/arcade-overworld to your project, or open: Import arcade-overworld.