godot-docs/classes/class_skeletonmodifier3d.rst

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.. _class_SkeletonModifier3D:

SkeletonModifier3D
==================

**Inherits:** :ref:`Node3D<class_Node3D>` **<** :ref:`Node<class_Node>` **<** :ref:`Object<class_Object>`

**Inherited By:** :ref:`BoneConstraint3D<class_BoneConstraint3D>`, :ref:`LookAtModifier3D<class_LookAtModifier3D>`, :ref:`ModifierBoneTarget3D<class_ModifierBoneTarget3D>`, :ref:`PhysicalBoneSimulator3D<class_PhysicalBoneSimulator3D>`, :ref:`RetargetModifier3D<class_RetargetModifier3D>`, :ref:`SkeletonIK3D<class_SkeletonIK3D>`, :ref:`SpringBoneSimulator3D<class_SpringBoneSimulator3D>`, :ref:`XRBodyModifier3D<class_XRBodyModifier3D>`, :ref:`XRHandModifier3D<class_XRHandModifier3D>`

A node that may modify a Skeleton3D's bones.

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

**SkeletonModifier3D** retrieves a target :ref:`Skeleton3D<class_Skeleton3D>` by having a :ref:`Skeleton3D<class_Skeleton3D>` parent.

If there is an :ref:`AnimationMixer<class_AnimationMixer>`, a modification always performs after playback process of the :ref:`AnimationMixer<class_AnimationMixer>`.

This node should be used to implement custom IK solvers, constraints, or skeleton physics.

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Tutorials
---------

- `Design of the Skeleton Modifier 3D <https://godotengine.org/article/design-of-the-skeleton-modifier-3d/>`__

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Properties
----------

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   :widths: auto

   +---------------------------+---------------------------------------------------------------+----------+
   | :ref:`bool<class_bool>`   | :ref:`active<class_SkeletonModifier3D_property_active>`       | ``true`` |
   +---------------------------+---------------------------------------------------------------+----------+
   | :ref:`float<class_float>` | :ref:`influence<class_SkeletonModifier3D_property_influence>` | ``1.0``  |
   +---------------------------+---------------------------------------------------------------+----------+

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Methods
-------

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   +-------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | |void|                              | :ref:`_process_modification<class_SkeletonModifier3D_private_method__process_modification>`\ (\ ) |virtual|                                                                                                 |
   +-------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | |void|                              | :ref:`_process_modification_with_delta<class_SkeletonModifier3D_private_method__process_modification_with_delta>`\ (\ delta\: :ref:`float<class_float>`\ ) |virtual|                                        |
   +-------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | |void|                              | :ref:`_skeleton_changed<class_SkeletonModifier3D_private_method__skeleton_changed>`\ (\ old_skeleton\: :ref:`Skeleton3D<class_Skeleton3D>`, new_skeleton\: :ref:`Skeleton3D<class_Skeleton3D>`\ ) |virtual| |
   +-------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | |void|                              | :ref:`_validate_bone_names<class_SkeletonModifier3D_private_method__validate_bone_names>`\ (\ ) |virtual|                                                                                                   |
   +-------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`Skeleton3D<class_Skeleton3D>` | :ref:`get_skeleton<class_SkeletonModifier3D_method_get_skeleton>`\ (\ ) |const|                                                                                                                             |
   +-------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

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Signals
-------

.. _class_SkeletonModifier3D_signal_modification_processed:

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**modification_processed**\ (\ ) :ref:`🔗<class_SkeletonModifier3D_signal_modification_processed>`

Notifies when the modification have been finished.

\ **Note:** If you want to get the modified bone pose by the modifier, you must use :ref:`Skeleton3D.get_bone_pose()<class_Skeleton3D_method_get_bone_pose>` or :ref:`Skeleton3D.get_bone_global_pose()<class_Skeleton3D_method_get_bone_global_pose>` at the moment this signal is fired.

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Enumerations
------------

.. _enum_SkeletonModifier3D_BoneAxis:

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enum **BoneAxis**: :ref:`🔗<enum_SkeletonModifier3D_BoneAxis>`

.. _class_SkeletonModifier3D_constant_BONE_AXIS_PLUS_X:

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:ref:`BoneAxis<enum_SkeletonModifier3D_BoneAxis>` **BONE_AXIS_PLUS_X** = ``0``

Enumerated value for the +X axis.

.. _class_SkeletonModifier3D_constant_BONE_AXIS_MINUS_X:

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:ref:`BoneAxis<enum_SkeletonModifier3D_BoneAxis>` **BONE_AXIS_MINUS_X** = ``1``

Enumerated value for the -X axis.

.. _class_SkeletonModifier3D_constant_BONE_AXIS_PLUS_Y:

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:ref:`BoneAxis<enum_SkeletonModifier3D_BoneAxis>` **BONE_AXIS_PLUS_Y** = ``2``

Enumerated value for the +Y axis.

.. _class_SkeletonModifier3D_constant_BONE_AXIS_MINUS_Y:

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:ref:`BoneAxis<enum_SkeletonModifier3D_BoneAxis>` **BONE_AXIS_MINUS_Y** = ``3``

Enumerated value for the -Y axis.

.. _class_SkeletonModifier3D_constant_BONE_AXIS_PLUS_Z:

.. rst-class:: classref-enumeration-constant

:ref:`BoneAxis<enum_SkeletonModifier3D_BoneAxis>` **BONE_AXIS_PLUS_Z** = ``4``

Enumerated value for the +Z axis.

.. _class_SkeletonModifier3D_constant_BONE_AXIS_MINUS_Z:

.. rst-class:: classref-enumeration-constant

:ref:`BoneAxis<enum_SkeletonModifier3D_BoneAxis>` **BONE_AXIS_MINUS_Z** = ``5``

Enumerated value for the -Z axis.

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

.. _class_SkeletonModifier3D_property_active:

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:ref:`bool<class_bool>` **active** = ``true`` :ref:`🔗<class_SkeletonModifier3D_property_active>`

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- |void| **set_active**\ (\ value\: :ref:`bool<class_bool>`\ )
- :ref:`bool<class_bool>` **is_active**\ (\ )

If ``true``, the **SkeletonModifier3D** will be processing.

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----

.. _class_SkeletonModifier3D_property_influence:

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:ref:`float<class_float>` **influence** = ``1.0`` :ref:`🔗<class_SkeletonModifier3D_property_influence>`

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- |void| **set_influence**\ (\ value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_influence**\ (\ )

Sets the influence of the modification.

\ **Note:** This value is used by :ref:`Skeleton3D<class_Skeleton3D>` to blend, so the **SkeletonModifier3D** should always apply only 100% of the result without interpolation.

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

.. _class_SkeletonModifier3D_private_method__process_modification:

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|void| **_process_modification**\ (\ ) |virtual| :ref:`🔗<class_SkeletonModifier3D_private_method__process_modification>`

**Deprecated:** Use :ref:`_process_modification_with_delta()<class_SkeletonModifier3D_private_method__process_modification_with_delta>` instead.

Override this virtual method to implement a custom skeleton modifier. You should do things like get the :ref:`Skeleton3D<class_Skeleton3D>`'s current pose and apply the pose here.

\ :ref:`_process_modification()<class_SkeletonModifier3D_private_method__process_modification>` must not apply :ref:`influence<class_SkeletonModifier3D_property_influence>` to bone poses because the :ref:`Skeleton3D<class_Skeleton3D>` automatically applies influence to all bone poses set by the modifier.

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.. _class_SkeletonModifier3D_private_method__process_modification_with_delta:

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|void| **_process_modification_with_delta**\ (\ delta\: :ref:`float<class_float>`\ ) |virtual| :ref:`🔗<class_SkeletonModifier3D_private_method__process_modification_with_delta>`

Override this virtual method to implement a custom skeleton modifier. You should do things like get the :ref:`Skeleton3D<class_Skeleton3D>`'s current pose and apply the pose here.

\ :ref:`_process_modification_with_delta()<class_SkeletonModifier3D_private_method__process_modification_with_delta>` must not apply :ref:`influence<class_SkeletonModifier3D_property_influence>` to bone poses because the :ref:`Skeleton3D<class_Skeleton3D>` automatically applies influence to all bone poses set by the modifier.

\ ``delta`` is passed from parent :ref:`Skeleton3D<class_Skeleton3D>`. See also :ref:`Skeleton3D.advance()<class_Skeleton3D_method_advance>`.

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.. _class_SkeletonModifier3D_private_method__skeleton_changed:

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|void| **_skeleton_changed**\ (\ old_skeleton\: :ref:`Skeleton3D<class_Skeleton3D>`, new_skeleton\: :ref:`Skeleton3D<class_Skeleton3D>`\ ) |virtual| :ref:`🔗<class_SkeletonModifier3D_private_method__skeleton_changed>`

Called when the skeleton is changed.

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.. _class_SkeletonModifier3D_private_method__validate_bone_names:

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|void| **_validate_bone_names**\ (\ ) |virtual| :ref:`🔗<class_SkeletonModifier3D_private_method__validate_bone_names>`

Called when bone name and index need to be validated such as the timing of the entering tree or changing skeleton.

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----

.. _class_SkeletonModifier3D_method_get_skeleton:

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:ref:`Skeleton3D<class_Skeleton3D>` **get_skeleton**\ (\ ) |const| :ref:`🔗<class_SkeletonModifier3D_method_get_skeleton>`

Get parent :ref:`Skeleton3D<class_Skeleton3D>` node if found.

.. |virtual| replace:: :abbr:`virtual (This method should typically be overridden by the user to have any effect.)`
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.. |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.)`
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