
	Introduction Return to Main

	Floor Layout Floor Offsets Player Starting Position Filling the Map The Elevators No Touch Zones Floor Creation The Root Path Filling Solo Holes Fire The Generators

	Locking Trill Shops and Computers Pushable Walls The Puzzles Grate Traps Cupboard Traps Doors Raiser Walls Wall Holes Encounters Mines and Cupboards Grates and Fire Hydrants Wall Decorations Holes Fake Walls and Spinners

	Outside a Base

Grate Traps

Grate traps are used to make a wall appear behind the player when stepping on a grate. Each grate trap is associated with an unlocker button which is always located in a dead end. The generator starts by finding a random dead end.

The grate

Starting from the dead end, the generator uses the root directions to go back a random number of cells between 8 and 15 times. While it's going back, it makes sure that each cell is free of puzzle blocking artifact because we don't want a puzzle to prevent us from reaching the unlocker.

When the location is reached, the position is saved and the generator goes back 1 more cell to see if we can make a wall appear at this location. If the cell is not a standard floor (ie. random floor, open floor or dark area), the generator will cancel the saved position of the grate and try to move it 1 cell back until it has reached a good spot. If the cell is a puzzle artifact, the attempt is aborted.

Once a valid spot is found for the unlocker, grate and appearing wall, the map is modified. A maximum of 16 traps can be created.

Here, the three grate traps and their related unlockers are highlighted in yellow so you can better see them (map is getting crowded, isn't it!)