드랍과 확률 — 맵 제작 강좌

Classic triggers have no random function. What they have is SetSwitch with Randomize, which flips a switch on or off at random. One switch is exactly 50%, so stacking them builds other odds.

Trigger { -- 보스가 죽으면 주사위를 굴린다
	players = {Force1},
	conditions = {
		Kills(CurrentPlayer, AtLeast, 1, "Boss Unit");
	},
	actions = {
		SetKills(CurrentPlayer, SetTo, 0, "Boss Unit");
		SetSwitch("Drop A", Randomize);
		SetSwitch("Drop B", Randomize);
		SetDeaths(CurrentPlayer, SetTo, 1, "RollDrop");
		PreserveTrigger();
	},
}

Trigger { -- 둘 다 켜졌을 때만 = 25%
	players = {Force1},
	conditions = {
		Deaths(CurrentPlayer, Exactly, 1, "RollDrop");
		Switch("Drop A", Set);
		Switch("Drop B", Set);
	},
	actions = {
		SetDeaths(CurrentPlayer, SetTo, 0, "RollDrop");
		CreateUnit(1, "Rare Item", "Player Start", CurrentPlayer);
		DisplayText("\x13\x03희귀 아이템을 획득했습니다!");
		PreserveTrigger();
	},
}

Two switches both on is one chance in four; three gives one in eight.

Switches are shared by the whole map, so two players rolling at once overwrite each other. That is why the roll is marked with a per-player counter and resolved inside the same cycle.

Odds like 25% or 12.5% are easy; 10% or 3% cannot be hit exactly this way. When you need a precise chance, that is what EUD's f_rand is for.