added enemy state machine with idle, stunned, and dead states

scripts/EnemyIdle.gd

@@ -0,0 +1,50 @@
+extends EnemyState
+class_name EnemyIdle
+
+
+var move_direction : Vector3
+var scan_direction : float
+
+var wander_time : float
+var scan_time : float
+
+const WANDER_AMT = 50
+const TURRET_TURN_AMT : float = 180.0
+
+func randomize_wander():
+	var x = randf_range(-WANDER_AMT,WANDER_AMT)
+	var z = randf_range(-WANDER_AMT,WANDER_AMT)
+	move_direction = enemy.global_position + Vector3(x,0,z)
+	enemy.nav_agent.set_target_position(move_direction)
+	wander_time = randf_range(1,3)
+
+func randomize_turret_scan():
+	scan_direction = randf_range(-TURRET_TURN_AMT,TURRET_TURN_AMT)
+	scan_time = randf_range(1,3)
+
+func _Enter():
+	randomize_wander()
+
+func Update(delta: float):
+	if wander_time > 0:
+		wander_time -= delta
+	else:
+		randomize_wander()
+	
+	if scan_time > 0:
+		scan_time -= delta
+	else:
+		randomize_turret_scan()
+
+func Physics_Update(delta : float):
+	if enemy:
+		var destination = enemy.nav_agent.get_next_path_position()
+		var local_destination = destination - enemy.global_position
+		var direction = local_destination.normalized()
+		if enemy.global_position.distance_to(local_destination) > 1:
+			enemy.velocity = direction * move_speed
+			enemy.spider_look_next.look_at(destination)
+			var look_target = enemy.spider_look_next.global_rotation.y
+			enemy.global_rotation.y = lerp(enemy.global_rotation.y,look_target,delta * 3)
+		
+		enemy.turret.rotation.y = lerp(enemy.turret.rotation.y,deg_to_rad(scan_direction),delta)