godot-docs/classes/class_canvaslayer.rst

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.. XML source: https://github.com/godotengine/godot/tree/master/doc/classes/CanvasLayer.xml.

.. _class_CanvasLayer:

CanvasLayer
===========

**Inherits:** :ref:`Node<class_Node>` **<** :ref:`Object<class_Object>`

**Inherited By:** :ref:`ParallaxBackground<class_ParallaxBackground>`

Canvas drawing layer.

Description
-----------

Canvas drawing layer. :ref:`CanvasItem<class_CanvasItem>` nodes that are direct or indirect children of a ``CanvasLayer`` 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 ``CanvasLayer`` 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).

Tutorials
---------

- :doc:`Viewport and canvas transforms <../tutorials/2d/2d_transforms>`

- :doc:`Canvas layers <../tutorials/2d/canvas_layers>`

- `2D Dodge The Creeps Demo <https://godotengine.org/asset-library/asset/515>`__

Properties
----------

+---------------------------------------+------------------------------------------------------------------------------------+-----------------------------------+
| :ref:`Node<class_Node>`               | :ref:`custom_viewport<class_CanvasLayer_property_custom_viewport>`                 |                                   |
+---------------------------------------+------------------------------------------------------------------------------------+-----------------------------------+
| :ref:`bool<class_bool>`               | :ref:`follow_viewport_enabled<class_CanvasLayer_property_follow_viewport_enabled>` | ``false``                         |
+---------------------------------------+------------------------------------------------------------------------------------+-----------------------------------+
| :ref:`float<class_float>`             | :ref:`follow_viewport_scale<class_CanvasLayer_property_follow_viewport_scale>`     | ``1.0``                           |
+---------------------------------------+------------------------------------------------------------------------------------+-----------------------------------+
| :ref:`int<class_int>`                 | :ref:`layer<class_CanvasLayer_property_layer>`                                     | ``1``                             |
+---------------------------------------+------------------------------------------------------------------------------------+-----------------------------------+
| :ref:`Vector2<class_Vector2>`         | :ref:`offset<class_CanvasLayer_property_offset>`                                   | ``Vector2(0, 0)``                 |
+---------------------------------------+------------------------------------------------------------------------------------+-----------------------------------+
| :ref:`float<class_float>`             | :ref:`rotation<class_CanvasLayer_property_rotation>`                               | ``0.0``                           |
+---------------------------------------+------------------------------------------------------------------------------------+-----------------------------------+
| :ref:`Vector2<class_Vector2>`         | :ref:`scale<class_CanvasLayer_property_scale>`                                     | ``Vector2(1, 1)``                 |
+---------------------------------------+------------------------------------------------------------------------------------+-----------------------------------+
| :ref:`Transform2D<class_Transform2D>` | :ref:`transform<class_CanvasLayer_property_transform>`                             | ``Transform2D(1, 0, 0, 1, 0, 0)`` |
+---------------------------------------+------------------------------------------------------------------------------------+-----------------------------------+
| :ref:`bool<class_bool>`               | :ref:`visible<class_CanvasLayer_property_visible>`                                 | ``true``                          |
+---------------------------------------+------------------------------------------------------------------------------------+-----------------------------------+

Methods
-------

+-----------------------+----------------------------------------------------------------------------+
| :ref:`RID<class_RID>` | :ref:`get_canvas<class_CanvasLayer_method_get_canvas>` **(** **)** |const| |
+-----------------------+----------------------------------------------------------------------------+
| void                  | :ref:`hide<class_CanvasLayer_method_hide>` **(** **)**                     |
+-----------------------+----------------------------------------------------------------------------+
| void                  | :ref:`show<class_CanvasLayer_method_show>` **(** **)**                     |
+-----------------------+----------------------------------------------------------------------------+

Signals
-------

.. _class_CanvasLayer_signal_visibility_changed:

- **visibility_changed** **(** **)**

Emitted when visibility of the layer is changed. See :ref:`visible<class_CanvasLayer_property_visible>`.

Property Descriptions
---------------------

.. _class_CanvasLayer_property_custom_viewport:

- :ref:`Node<class_Node>` **custom_viewport**

+----------+----------------------------+
| *Setter* | set_custom_viewport(value) |
+----------+----------------------------+
| *Getter* | get_custom_viewport()      |
+----------+----------------------------+

The custom :ref:`Viewport<class_Viewport>` node assigned to the ``CanvasLayer``. If ``null``, uses the default viewport instead.

----

.. _class_CanvasLayer_property_follow_viewport_enabled:

- :ref:`bool<class_bool>` **follow_viewport_enabled**

+-----------+----------------------------+
| *Default* | ``false``                  |
+-----------+----------------------------+
| *Setter*  | set_follow_viewport(value) |
+-----------+----------------------------+
| *Getter*  | is_following_viewport()    |
+-----------+----------------------------+

If enabled, the ``CanvasLayer`` will use the viewport's transform, so it will move when camera moves instead of being anchored in a fixed position on the screen.

Together with :ref:`follow_viewport_scale<class_CanvasLayer_property_follow_viewport_scale>` it can be used for a pseudo 3D effect.

----

.. _class_CanvasLayer_property_follow_viewport_scale:

- :ref:`float<class_float>` **follow_viewport_scale**

+-----------+----------------------------------+
| *Default* | ``1.0``                          |
+-----------+----------------------------------+
| *Setter*  | set_follow_viewport_scale(value) |
+-----------+----------------------------------+
| *Getter*  | get_follow_viewport_scale()      |
+-----------+----------------------------------+

Scales the layer when using :ref:`follow_viewport_enabled<class_CanvasLayer_property_follow_viewport_enabled>`. Layers moving into the foreground should have increasing scales, while layers moving into the background should have decreasing scales.

----

.. _class_CanvasLayer_property_layer:

- :ref:`int<class_int>` **layer**

+-----------+------------------+
| *Default* | ``1``            |
+-----------+------------------+
| *Setter*  | set_layer(value) |
+-----------+------------------+
| *Getter*  | get_layer()      |
+-----------+------------------+

Layer index for draw order. Lower values are drawn first.

----

.. _class_CanvasLayer_property_offset:

- :ref:`Vector2<class_Vector2>` **offset**

+-----------+-------------------+
| *Default* | ``Vector2(0, 0)`` |
+-----------+-------------------+
| *Setter*  | set_offset(value) |
+-----------+-------------------+
| *Getter*  | get_offset()      |
+-----------+-------------------+

The layer's base offset.

----

.. _class_CanvasLayer_property_rotation:

- :ref:`float<class_float>` **rotation**

+-----------+---------------------+
| *Default* | ``0.0``             |
+-----------+---------------------+
| *Setter*  | set_rotation(value) |
+-----------+---------------------+
| *Getter*  | get_rotation()      |
+-----------+---------------------+

The layer's rotation in radians.

----

.. _class_CanvasLayer_property_scale:

- :ref:`Vector2<class_Vector2>` **scale**

+-----------+-------------------+
| *Default* | ``Vector2(1, 1)`` |
+-----------+-------------------+
| *Setter*  | set_scale(value)  |
+-----------+-------------------+
| *Getter*  | get_scale()       |
+-----------+-------------------+

The layer's scale.

----

.. _class_CanvasLayer_property_transform:

- :ref:`Transform2D<class_Transform2D>` **transform**

+-----------+-----------------------------------+
| *Default* | ``Transform2D(1, 0, 0, 1, 0, 0)`` |
+-----------+-----------------------------------+
| *Setter*  | set_transform(value)              |
+-----------+-----------------------------------+
| *Getter*  | get_transform()                   |
+-----------+-----------------------------------+

The layer's transform.

----

.. _class_CanvasLayer_property_visible:

- :ref:`bool<class_bool>` **visible**

+-----------+--------------------+
| *Default* | ``true``           |
+-----------+--------------------+
| *Setter*  | set_visible(value) |
+-----------+--------------------+
| *Getter*  | is_visible()       |
+-----------+--------------------+

If ``false``, any :ref:`CanvasItem<class_CanvasItem>` under this ``CanvasLayer`` will be hidden.

Unlike :ref:`CanvasItem.visible<class_CanvasItem_property_visible>`, visibility of a ``CanvasLayer`` isn't propagated to underlying layers.

Method Descriptions
-------------------

.. _class_CanvasLayer_method_get_canvas:

- :ref:`RID<class_RID>` **get_canvas** **(** **)** |const|

Returns the RID of the canvas used by this layer.

----

.. _class_CanvasLayer_method_hide:

- void **hide** **(** **)**

Hides any :ref:`CanvasItem<class_CanvasItem>` under this ``CanvasLayer``. This is equivalent to setting :ref:`visible<class_CanvasLayer_property_visible>` to ``false``.

----

.. _class_CanvasLayer_method_show:

- void **show** **(** **)**

Shows any :ref:`CanvasItem<class_CanvasItem>` under this ``CanvasLayer``. This is equivalent to setting :ref:`visible<class_CanvasLayer_property_visible>` to ``true``.

.. |virtual| replace:: :abbr:`virtual (This method should typically be overridden by the user to have any effect.)`
.. |const| replace:: :abbr:`const (This method has no side effects. It doesn't modify any of the instance's member variables.)`
.. |vararg| replace:: :abbr:`vararg (This method accepts any number of arguments after the ones described here.)`
.. |constructor| replace:: :abbr:`constructor (This method is used to construct a type.)`
.. |static| replace:: :abbr:`static (This method doesn't need an instance to be called, so it can be called directly using the class name.)`
.. |operator| replace:: :abbr:`operator (This method describes a valid operator to use with this type as left-hand operand.)`