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.. DO NOT EDIT THIS FILE!!!
.. Generated automatically from Godot engine sources.
.. Generator: https://github.com/godotengine/godot/tree/master/doc/tools/make_rst.py.
.. XML source: https://github.com/godotengine/godot/tree/master/doc/classes/VisualShaderNodeGlobalExpression.xml.

.. _class_VisualShaderNodeGlobalExpression:

VisualShaderNodeGlobalExpression
================================

**Inherits:** :ref:`VisualShaderNodeExpression<class_VisualShaderNodeExpression>` **<** :ref:`VisualShaderNodeGroupBase<class_VisualShaderNodeGroupBase>` **<** :ref:`VisualShaderNodeResizableBase<class_VisualShaderNodeResizableBase>` **<** :ref:`VisualShaderNode<class_VisualShaderNode>` **<** :ref:`Resource<class_Resource>` **<** :ref:`RefCounted<class_RefCounted>` **<** :ref:`Object<class_Object>`

A custom global visual shader graph expression written in Godot Shading Language.

.. rst-class:: classref-introduction-group

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

Custom Godot Shader Language expression, which is placed on top of the generated shader. You can place various function definitions inside to call later in :ref:`VisualShaderNodeExpression<class_VisualShaderNodeExpression>`\ s (which are injected in the main shader functions). You can also declare varyings, uniforms and global constants.

.. |virtual| replace:: :abbr:`virtual (This method should typically be overridden by the user to have any effect.)`
.. |required| replace:: :abbr:`required (This method is required to be overridden when extending its base class.)`
.. |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.)`
.. |bitfield| replace:: :abbr:`BitField (This value is an integer composed as a bitmask of the following flags.)`
.. |void| replace:: :abbr:`void (No return value.)`