Linedef type 313
Linedef type 313, No More Enemies – Once, is a type of linedef executor trigger which activates any linedef executor in the control sector once no more enemies (bosses included) exist within a specified area. The linedef executor will trigger only the first time, and then will not be triggered again until the map is reloaded. This effect is useful for creating areas where the player has to destroy all enemies to move on.
This trigger uses invisible, intangible FOFs (linedef type 223) to specify the area that is checked for enemies; it is only activated when no more Objects with the flag
MF_BOSS exist inside these FOFs.
Create a control sector outside of your map and give one of its linedefs linedef type 313 (no tag is needed). In the same control sector, give as many linedefs as you wish linedef type 223, and tag each one to a target sector you want to be scanned for the presence of enemies. The game will go through the linedefs of the control sector, checking inside the areas occupied by the FOFs to see if any enemies exist. The floor height and ceiling height of the control sector indicate the floor and ceiling heights of the FOFs.
Additionally, create a new control sector (or use the former) and give one of its linedefs linedef type 300 or linedef type 302, and give it a tag equal to the length of the linedef with linedef type 313. If no enemies exist in any of the FOF areas, this linedef executor is run once. Any linedef executor effect you would like to be triggered should be applied to other linedefs on this same control sector.
- Example WAD: ex_ld313_trigger_nomoreenemiesonce.wad
- This example WAD can be played in Single Player mode. It uses
MAP01, replacing Greenflower Zone Act 1.