Small GZDoom zscript function for checking input buttons

keycheck.zsc

// ----------------------------------------
// the default pointer is "self" for use in a custom player class.
// For an inventory item it would be owner, etc.
// if (KeyCheck(BT_ATTACK, KPT_JUSTPRESSED)) { console.printf("just pressed Attack!"); }
// ----------------------------------------
bool KeyCheck(int toCheck, int checkType = KPT_PRESSING, PlayerPawn pointer = null) {
	if (pointer == null) { pointer = PlayerPawn(self); } // default fallback
	if (!pointer) { return; } // nullcheck just to be safe
	int b = pointer.player.cmd.buttons; int ob = pointer.player.oldbuttons;
	switch (checkType) {
		case KPT_PRESSING: return (b&toCheck);break;
		case KPT_JUSTPRESSED: return ((b&toCheck) && !(ob&toCheck));break;
		case KPT_JUSTRELEASED: return (!(b&toCheck) && (ob&toCheck));break;
		case KPT_HELD: return ((b&toCheck) && (ob&toCheck));break;
	}return false;
}

enum KeyPressTypes {
	KPT_PRESSING,
	KPT_JUSTPRESSED,
	KPT_JUSTRELEASED,
	KPT_HELD,
}