make arrows collide with dynamic objects (closes #61)

objects/environment/rock/crate.tscn

@@ -9,7 +9,7 @@ shader = ExtResource( 2 )
 shader_param/border_color = Color( 0, 0, 0, 1 )
 shader_param/border_corners = true
 
-[node name="Rock" instance=ExtResource( 1 )]
+[node name="Crate" instance=ExtResource( 1 )]
 
 [node name="Sprite" parent="." index="0"]
 material = SubResource( 1 )

objects/environment/rock/rock.tscn

@@ -15,7 +15,7 @@ extents = Vector2( 3.7, 4 )
 [sub_resource type="RectangleShape2D" id=3]
 extents = Vector2( 4, 4 )
 
-[node name="Rock" type="KinematicBody2D" groups=["pushable"]]
+[node name="Rock" type="KinematicBody2D" groups=["pushable", "stop_arrow"]]
 collision_layer = 4
 script = ExtResource( 3 )
 

objects/player/arrow_projectile.gd

@@ -30,7 +30,7 @@ func _physics_process(delta):
 #Wall Collision
 func _on_Hitbox_body_entered(body):
 	if breaks_on_wall:
-		if body is TileMap or body is StaticBody2D:
+		if body is TileMap or body is StaticBody2D or body.is_in_group("stop_arrow"):
 			_make_sparks()
 			_persist_trail()
 			queue_free()

objects/player/arrow_projectile.tscn

@@ -46,6 +46,7 @@ scale_amount_random = 0.25
 scale_amount_curve = SubResource( 3 )
 
 [node name="Hitbox" type="Area2D" parent="." groups=["arrow"]]
+collision_mask = 5
 
 [node name="CollisionShape2D" type="CollisionShape2D" parent="Hitbox"]
 position = Vector2( -0.5, -0.5 )