Added a function for triggering use/push specials for usage in custom…

… monster AI.
ZDoom · Dec 7, 2018 · ebcd6e8 · ebcd6e8
1 parent 13de44f
commit ebcd6e8
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Showing 2 changed files with 25 additions and 0 deletions.
diff --git a/src/p_enemy.cpp b/src/p_enemy.cpp
@@ -651,6 +651,30 @@ int P_Move (AActor *actor)
 	return true; 
 }
 
+DEFINE_ACTION_FUNCTION(AActor, CheckMonsterUseSpecials)
+{
+	PARAM_SELF_PROLOGUE(AActor);
+
+	spechit_t spec;
+	int good = 0;
+
+	if (!(self->flags6 & MF6_NOTRIGGER))
+	{
+		while (spechit.Pop (spec))
+		{
+			// [RH] let monsters push lines, as well as use them
+			if (((self->flags4 & MF4_CANUSEWALLS) && P_ActivateLine (spec.line, self, 0, SPAC_Use)) ||
+				((self->flags2 & MF2_PUSHWALL) && P_ActivateLine (spec.line, self, 0, SPAC_Push)))
+			{
+				good |= spec.line == self->BlockingLine ? 1 : 2;
+			}
+		}
+	}
+	else spechit.Clear();
+
+	ACTION_RETURN_INT(good);
+}
+
 //=============================================================================
 //
 // TryWalk

diff --git a/wadsrc/static/zscript/actor.txt b/wadsrc/static/zscript/actor.txt
@@ -627,6 +627,7 @@ class Actor : Thinker native
 	native void CheckFakeFloorTriggers (double oldz, bool oldz_has_viewheight = false);
 	native bool CheckFor3DFloorHit(double z, bool trigger);
 	native bool CheckFor3DCeilingHit(double z, bool trigger);
+	native int CheckMonsterUseSpecials();
 
 	native bool CheckMissileSpawn(double maxdist);
 	native bool CheckPosition(Vector2 pos, bool actorsonly = false, FCheckPosition tm = null);