clip_polyline_with_polygon() return nothing but (0, 0) | Godot Café | Page 1

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Hey all quick question: I wanted to draw a polyline and remove a chunk of wall from it. I have a room_rect (gold) and a clip_rect (red):

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Now, I wanted to draw the room_rect, but remove chunks of it for a door (where the red clip_rect is as you might have guessed). So I figured I'd try clip_polyline_with_polygon(), that's what it's for, right? But when I tried, absolutely nothing gets drawn anymore. When I try to print clip_polyline_with_polygon's output, I get [(0.0, 0.0), (0.0, 0.0)]. Any thoughts?

func _draw() -> void:
    for room in player_ship.rooms:
        var converted_room_pos : Vector2i = room.grid_position * tile_size
        var converted_room_dims : Vector2i = room.dimensions * tile_size
        
        var room_rect : PackedVector2Array = [
            converted_room_pos,
            converted_room_pos + Vector2i.RIGHT * converted_room_dims.x,
            converted_room_pos + converted_room_dims,
            converted_room_pos + Vector2i.DOWN * converted_room_dims.y,
            converted_room_pos]
        var clip_rect : PackedVector2Array = [
            Vector2i(32, -4),
            Vector2i(64, -4),
            Vector2i(64, 4),
            Vector2i(32, 4),
            Vector2i(32, -4)]

        var drawn_room : PackedVector2Array = Geometry2D.clip_polyline_with_polygon(room_rect, clip_rect)

        draw_multiline(drawn_room, Color.BLACK, 2)
        print(drawn_room)
        #draw_polyline(room_rect, Color.GOLD, 2.0)
        #draw_colored_polygon(clip_rect, Color.RED)

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(Note the commented out lines near the bottom of the block of code)

#clip_polyline_with_polygon() return nothing but (0, 0)