Canvas drawing layer. Canvas drawing layer. [CanvasItem] nodes that are direct or indirect children of a [code]CanvasLayer[/code] will be drawn in that layer. The layer is a numeric index that defines the draw order. The default 2D scene renders with index 0, so a [code]CanvasLayer[/code] with index -1 will be drawn below, and one with index 1 will be drawn above. This is very useful for HUDs (in layer 1+ or above), or backgrounds (in layer -1 or below). Returns the [Viewport] used by the camera if it is not using the default viewport. Return the base rotation for this layer in radians (helper). Return the base transform for this layer. Return the [World2D] used by this layer. Assigns a custom [Viewport] node to the [code]CanvasLayer[/code]. If [code]viewport[/code] is not a [Viewport], it re-assigns the default viewport instead. Set the base rotation for this layer in radians (helper). Set the base transform for this layer. Layer index for draw order. Lower values are drawn first. Default value: [code]1[/code]. The layer's base offset. The layer's rotation in degrees. The layer's scale.