add defense ai control object

planet/Objects.ocd/Goals.ocd/Defense.ocd/DefenseAI.ocd/DefCore.txt

@@ -0,0 +1,5 @@
+[DefCore]
+id=DefenseAI
+Version=8,0
+Category=C4D_None | C4D_MouseIgnore
+HideInCreator=true

planet/Objects.ocd/Goals.ocd/Defense.ocd/DefenseAI.ocd/Script.c

@@ -0,0 +1,51 @@
+/**
+	Defense AI
+	Controls enemy behaviour in defense scenarios.
+
+	@author Sven2, Clonkonaut, Maikel
+*/
+
+#include AI
+
+
+public func AddAI(object clonk)
+{
+	// Add normal AI and adapt it.
+	var fx = AI->AddAI(clonk);
+	if (fx)
+	{
+		clonk.ExecuteAI = DefenseAI.Execute;
+		fx.ai = DefenseAI;
+	}
+	return fx;
+}
+
+private func FindTarget(effect fx)
+{
+	var target = _inherited(fx, ...);
+	// Focus on defense target if normal target is too far away.
+	if (!target || ObjectDistance(target, fx.Target) > DefenseAI.AI_AltTargetDistance)
+		target = GetRandomAttackTarget(fx.Target);
+	return target;
+}
+
+private func FindInventoryWeapon(effect fx)
+{
+	// Alternative behavior when riding the boom attack.
+	if (fx.vehicle && fx.vehicle->GetID() == DefenseBoomAttack)
+	{
+		fx.weapon = FindContents(Bow);
+		fx.strategy = fx.ai.ExecuteRanged;
+		fx.projectile_speed = 100;
+		fx.aim_wait = 0;
+		fx.ammo_check = fx.ai.HasArrows;
+		fx.ranged = true;
+		return true; 
+	}
+	return _inherited(fx, ...);
+}
+
+
+/*-- Properties --*/
+
+local AI_AltTargetDistance = 400;