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.. Generated automatically by doc/tools/make_rst.py in Godot's source tree.
.. DO NOT EDIT THIS FILE, but the VisualShaderNodeGlobalExpression.xml source instead.
.. The source is found in doc/classes or modules/<name>/doc_classes.

.. _class_VisualShaderNodeGlobalExpression:

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

**Inherits:** :ref:`VisualShaderNodeExpression<class_VisualShaderNodeExpression>` **<** :ref:`VisualShaderNodeGroupBase<class_VisualShaderNodeGroupBase>` **<** :ref:`VisualShaderNode<class_VisualShaderNode>` **<** :ref:`Resource<class_Resource>` **<** :ref:`Reference<class_Reference>` **<** :ref:`Object<class_Object>`

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

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.)`
.. |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.)`