katana damage, no friendly fire

growth/CardInjects/CursorGun/cursor_bullet.gd

@@ -1,12 +1,14 @@
 extends Area2D
 
 @export var speed = 70
+@export var damage = 1
+@export var knockback_strength = 0.5
 
 
 func _physics_process(delta):
 	var direction = Vector2.RIGHT.rotated(self.rotation)     
 	self.position += direction * speed * delta
-	
+
 func _on_area_entered(area: Area2D) -> void:
 	if self.get_parent().is_in_group("Virus"):
 		# Prevent friendly fire
@@ -14,12 +16,14 @@ func _on_area_entered(area: Area2D) -> void:
 	print_debug("Cursor bullet hit %s" % area.name)
 	var area_parent = area.get_parent()
 	if (area_parent.is_in_group("Virus")):
-		area_parent.take_hit(1, self.position.direction_to(area.position) * 200, 1)
+		area_parent.take_hit(damage, self.position.direction_to(area.position) * 200, knockback_strength)
 		self.queue_free()
 
 func _on_body_entered(body):
+	if self.get_parent() == body:
+		return
 	print_debug("Cursor bullet hit %s" % body.name)
-	body.take_hit(1, self.position.direction_to(body.position) * 200, 1)
+	body.take_hit(damage, self.position.direction_to(body.position) * 200, knockback_strength)
 	self.queue_free()
 
 func _on_timer_timeout() -> void:

growth/CardInjects/Katana/katana.gd

@@ -1 +1,18 @@
 extends Node2D
+
+@export var damage = 5
+@export var knockback_strength = 3
+
+func _on_area_entered(area: Area2D) -> void:
+    if self.get_parent().is_in_group("Virus"):
+        # Prevent friendly fire
+        return
+    var area_parent = area.get_parent()
+    if (area_parent.is_in_group("Virus")):
+        area_parent.take_hit(damage, self.position.direction_to(area.position) * 200, knockback_strength)
+
+func _on_body_entered(body):
+    if self.get_parent() == body:
+        return
+    print_debug("Cursor bullet hit %s" % body.name)
+    body.take_hit(damage, self.position.direction_to(body.position) * 200, knockback_strength)

growth/CardInjects/Katana/katana.tscn

@@ -89,3 +89,6 @@ autoplay = "default"
 [node name="CollisionShape2D" type="CollisionShape2D" parent="Area2D"]
 position = Vector2(1, 1)
 shape = SubResource("RectangleShape2D_b0k4l")
+
+[connection signal="area_entered" from="Area2D" to="." method="_on_area_entered"]
+[connection signal="body_entered" from="Area2D" to="." method="_on_body_entered"]