godot-docs/classes/class_fabrik3d.rst

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.. _class_FABRIK3D:

FABRIK3D
========

**Inherits:** :ref:`IterateIK3D<class_IterateIK3D>` **<** :ref:`ChainIK3D<class_ChainIK3D>` **<** :ref:`IKModifier3D<class_IKModifier3D>` **<** :ref:`SkeletonModifier3D<class_SkeletonModifier3D>` **<** :ref:`Node3D<class_Node3D>` **<** :ref:`Node<class_Node>` **<** :ref:`Object<class_Object>`

Position based forward and backward reaching inverse kinematics solver.

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

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

**FABRIK3D** is position based IK, allowing precise and accurate tracking of targets. It's ideal for simple chains without limitations.

The resulting twist around the forward vector will always be kept from the previous pose.

\ **Note:** When the target is close to the root, it tends to produce zig-zag patterns, resulting in unnatural visual movement.

.. |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.)`