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

.. _class_VisualShaderNodeFaceForward:

VisualShaderNodeFaceForward
===========================

**Inherits:** :ref:`VisualShaderNode<class_VisualShaderNode>` **<** :ref:`Resource<class_Resource>` **<** :ref:`Reference<class_Reference>` **<** :ref:`Object<class_Object>`

Returns the vector that points in the same direction as a reference vector within the visual shader graph.

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

Translates to ``faceforward(N, I, Nref)`` in the shader language. The function has three vector parameters: ``N``, the vector to orient, ``I``, the incident vector, and ``Nref``, the reference vector. If the dot product of ``I`` and ``Nref`` is smaller than zero the return value is ``N``. Otherwise, ``-N`` is returned.

.. |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.)`