godot-docs/classes/class_softbody3d.rst

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.. _class_SoftBody3D:

SoftBody3D
==========

**Inherits:** :ref:`MeshInstance3D<class_MeshInstance3D>` **<** :ref:`GeometryInstance3D<class_GeometryInstance3D>` **<** :ref:`VisualInstance3D<class_VisualInstance3D>` **<** :ref:`Node3D<class_Node3D>` **<** :ref:`Node<class_Node>` **<** :ref:`Object<class_Object>`

A deformable 3D physics mesh.

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

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

A deformable 3D physics mesh. Used to create elastic or deformable objects such as cloth, rubber, or other flexible materials.

Additionally, **SoftBody3D** is subject to wind forces defined in :ref:`Area3D<class_Area3D>` (see :ref:`Area3D.wind_source_path<class_Area3D_property_wind_source_path>`, :ref:`Area3D.wind_force_magnitude<class_Area3D_property_wind_force_magnitude>`, and :ref:`Area3D.wind_attenuation_factor<class_Area3D_property_wind_attenuation_factor>`).

\ **Note:** There are many known bugs in **SoftBody3D**. Therefore, it's not recommended to use them for things that can affect gameplay (such as trampolines).

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Tutorials
---------

- :doc:`SoftBody <../tutorials/physics/soft_body>`

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Properties
----------

.. table::
   :widths: auto

   +-------------------------------------------------+-----------------------------------------------------------------------------------+------------------+
   | :ref:`int<class_int>`                           | :ref:`collision_layer<class_SoftBody3D_property_collision_layer>`                 | ``1``            |
   +-------------------------------------------------+-----------------------------------------------------------------------------------+------------------+
   | :ref:`int<class_int>`                           | :ref:`collision_mask<class_SoftBody3D_property_collision_mask>`                   | ``1``            |
   +-------------------------------------------------+-----------------------------------------------------------------------------------+------------------+
   | :ref:`float<class_float>`                       | :ref:`damping_coefficient<class_SoftBody3D_property_damping_coefficient>`         | ``0.01``         |
   +-------------------------------------------------+-----------------------------------------------------------------------------------+------------------+
   | :ref:`DisableMode<enum_SoftBody3D_DisableMode>` | :ref:`disable_mode<class_SoftBody3D_property_disable_mode>`                       | ``0``            |
   +-------------------------------------------------+-----------------------------------------------------------------------------------+------------------+
   | :ref:`float<class_float>`                       | :ref:`drag_coefficient<class_SoftBody3D_property_drag_coefficient>`               | ``0.0``          |
   +-------------------------------------------------+-----------------------------------------------------------------------------------+------------------+
   | :ref:`float<class_float>`                       | :ref:`linear_stiffness<class_SoftBody3D_property_linear_stiffness>`               | ``0.5``          |
   +-------------------------------------------------+-----------------------------------------------------------------------------------+------------------+
   | :ref:`NodePath<class_NodePath>`                 | :ref:`parent_collision_ignore<class_SoftBody3D_property_parent_collision_ignore>` | ``NodePath("")`` |
   +-------------------------------------------------+-----------------------------------------------------------------------------------+------------------+
   | :ref:`float<class_float>`                       | :ref:`pressure_coefficient<class_SoftBody3D_property_pressure_coefficient>`       | ``0.0``          |
   +-------------------------------------------------+-----------------------------------------------------------------------------------+------------------+
   | :ref:`bool<class_bool>`                         | :ref:`ray_pickable<class_SoftBody3D_property_ray_pickable>`                       | ``true``         |
   +-------------------------------------------------+-----------------------------------------------------------------------------------+------------------+
   | :ref:`int<class_int>`                           | :ref:`simulation_precision<class_SoftBody3D_property_simulation_precision>`       | ``5``            |
   +-------------------------------------------------+-----------------------------------------------------------------------------------+------------------+
   | :ref:`float<class_float>`                       | :ref:`total_mass<class_SoftBody3D_property_total_mass>`                           | ``1.0``          |
   +-------------------------------------------------+-----------------------------------------------------------------------------------+------------------+

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Methods
-------

.. table::
   :widths: auto

   +------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | |void|                                                                 | :ref:`add_collision_exception_with<class_SoftBody3D_method_add_collision_exception_with>`\ (\ body\: :ref:`Node<class_Node>`\ )                                                                                                                          |
   +------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`Array<class_Array>`\[:ref:`PhysicsBody3D<class_PhysicsBody3D>`\] | :ref:`get_collision_exceptions<class_SoftBody3D_method_get_collision_exceptions>`\ (\ )                                                                                                                                                                  |
   +------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`bool<class_bool>`                                                | :ref:`get_collision_layer_value<class_SoftBody3D_method_get_collision_layer_value>`\ (\ layer_number\: :ref:`int<class_int>`\ ) |const|                                                                                                                  |
   +------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`bool<class_bool>`                                                | :ref:`get_collision_mask_value<class_SoftBody3D_method_get_collision_mask_value>`\ (\ layer_number\: :ref:`int<class_int>`\ ) |const|                                                                                                                    |
   +------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`RID<class_RID>`                                                  | :ref:`get_physics_rid<class_SoftBody3D_method_get_physics_rid>`\ (\ ) |const|                                                                                                                                                                            |
   +------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`Vector3<class_Vector3>`                                          | :ref:`get_point_transform<class_SoftBody3D_method_get_point_transform>`\ (\ point_index\: :ref:`int<class_int>`\ )                                                                                                                                       |
   +------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`bool<class_bool>`                                                | :ref:`is_point_pinned<class_SoftBody3D_method_is_point_pinned>`\ (\ point_index\: :ref:`int<class_int>`\ ) |const|                                                                                                                                       |
   +------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | |void|                                                                 | :ref:`remove_collision_exception_with<class_SoftBody3D_method_remove_collision_exception_with>`\ (\ body\: :ref:`Node<class_Node>`\ )                                                                                                                    |
   +------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | |void|                                                                 | :ref:`set_collision_layer_value<class_SoftBody3D_method_set_collision_layer_value>`\ (\ layer_number\: :ref:`int<class_int>`, value\: :ref:`bool<class_bool>`\ )                                                                                         |
   +------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | |void|                                                                 | :ref:`set_collision_mask_value<class_SoftBody3D_method_set_collision_mask_value>`\ (\ layer_number\: :ref:`int<class_int>`, value\: :ref:`bool<class_bool>`\ )                                                                                           |
   +------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | |void|                                                                 | :ref:`set_point_pinned<class_SoftBody3D_method_set_point_pinned>`\ (\ point_index\: :ref:`int<class_int>`, pinned\: :ref:`bool<class_bool>`, attachment_path\: :ref:`NodePath<class_NodePath>` = NodePath(""), insert_at\: :ref:`int<class_int>` = -1\ ) |
   +------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

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

.. _enum_SoftBody3D_DisableMode:

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enum **DisableMode**: :ref:`🔗<enum_SoftBody3D_DisableMode>`

.. _class_SoftBody3D_constant_DISABLE_MODE_REMOVE:

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:ref:`DisableMode<enum_SoftBody3D_DisableMode>` **DISABLE_MODE_REMOVE** = ``0``

When :ref:`Node.process_mode<class_Node_property_process_mode>` is set to :ref:`Node.PROCESS_MODE_DISABLED<class_Node_constant_PROCESS_MODE_DISABLED>`, remove from the physics simulation to stop all physics interactions with this **SoftBody3D**.

Automatically re-added to the physics simulation when the :ref:`Node<class_Node>` is processed again.

.. _class_SoftBody3D_constant_DISABLE_MODE_KEEP_ACTIVE:

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

:ref:`DisableMode<enum_SoftBody3D_DisableMode>` **DISABLE_MODE_KEEP_ACTIVE** = ``1``

When :ref:`Node.process_mode<class_Node_property_process_mode>` is set to :ref:`Node.PROCESS_MODE_DISABLED<class_Node_constant_PROCESS_MODE_DISABLED>`, do not affect the physics simulation.

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

.. _class_SoftBody3D_property_collision_layer:

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:ref:`int<class_int>` **collision_layer** = ``1`` :ref:`🔗<class_SoftBody3D_property_collision_layer>`

.. rst-class:: classref-property-setget

- |void| **set_collision_layer**\ (\ value\: :ref:`int<class_int>`\ )
- :ref:`int<class_int>` **get_collision_layer**\ (\ )

The physics layers this SoftBody3D **is in**. Collision objects can exist in one or more of 32 different layers. See also :ref:`collision_mask<class_SoftBody3D_property_collision_mask>`.

\ **Note:** Object A can detect a contact with object B only if object B is in any of the layers that object A scans. See `Collision layers and masks <../tutorials/physics/physics_introduction.html#collision-layers-and-masks>`__ in the documentation for more information.

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.. _class_SoftBody3D_property_collision_mask:

.. rst-class:: classref-property

:ref:`int<class_int>` **collision_mask** = ``1`` :ref:`🔗<class_SoftBody3D_property_collision_mask>`

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- |void| **set_collision_mask**\ (\ value\: :ref:`int<class_int>`\ )
- :ref:`int<class_int>` **get_collision_mask**\ (\ )

The physics layers this SoftBody3D **scans**. Collision objects can scan one or more of 32 different layers. See also :ref:`collision_layer<class_SoftBody3D_property_collision_layer>`.

\ **Note:** Object A can detect a contact with object B only if object B is in any of the layers that object A scans. See `Collision layers and masks <../tutorials/physics/physics_introduction.html#collision-layers-and-masks>`__ in the documentation for more information.

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.. _class_SoftBody3D_property_damping_coefficient:

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:ref:`float<class_float>` **damping_coefficient** = ``0.01`` :ref:`🔗<class_SoftBody3D_property_damping_coefficient>`

.. rst-class:: classref-property-setget

- |void| **set_damping_coefficient**\ (\ value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_damping_coefficient**\ (\ )

The body's damping coefficient. Higher values will slow down the body more noticeably when forces are applied.

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.. _class_SoftBody3D_property_disable_mode:

.. rst-class:: classref-property

:ref:`DisableMode<enum_SoftBody3D_DisableMode>` **disable_mode** = ``0`` :ref:`🔗<class_SoftBody3D_property_disable_mode>`

.. rst-class:: classref-property-setget

- |void| **set_disable_mode**\ (\ value\: :ref:`DisableMode<enum_SoftBody3D_DisableMode>`\ )
- :ref:`DisableMode<enum_SoftBody3D_DisableMode>` **get_disable_mode**\ (\ )

Defines the behavior in physics when :ref:`Node.process_mode<class_Node_property_process_mode>` is set to :ref:`Node.PROCESS_MODE_DISABLED<class_Node_constant_PROCESS_MODE_DISABLED>`. See :ref:`DisableMode<enum_SoftBody3D_DisableMode>` for more details about the different modes.

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.. _class_SoftBody3D_property_drag_coefficient:

.. rst-class:: classref-property

:ref:`float<class_float>` **drag_coefficient** = ``0.0`` :ref:`🔗<class_SoftBody3D_property_drag_coefficient>`

.. rst-class:: classref-property-setget

- |void| **set_drag_coefficient**\ (\ value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_drag_coefficient**\ (\ )

The body's drag coefficient. Higher values increase this body's air resistance.

\ **Note:** This value is currently unused by Godot's default physics implementation.

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.. _class_SoftBody3D_property_linear_stiffness:

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:ref:`float<class_float>` **linear_stiffness** = ``0.5`` :ref:`🔗<class_SoftBody3D_property_linear_stiffness>`

.. rst-class:: classref-property-setget

- |void| **set_linear_stiffness**\ (\ value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_linear_stiffness**\ (\ )

Higher values will result in a stiffer body, while lower values will increase the body's ability to bend. The value can be between ``0.0`` and ``1.0`` (inclusive).

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.. _class_SoftBody3D_property_parent_collision_ignore:

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:ref:`NodePath<class_NodePath>` **parent_collision_ignore** = ``NodePath("")`` :ref:`🔗<class_SoftBody3D_property_parent_collision_ignore>`

.. rst-class:: classref-property-setget

- |void| **set_parent_collision_ignore**\ (\ value\: :ref:`NodePath<class_NodePath>`\ )
- :ref:`NodePath<class_NodePath>` **get_parent_collision_ignore**\ (\ )

:ref:`NodePath<class_NodePath>` to a :ref:`CollisionObject3D<class_CollisionObject3D>` this SoftBody3D should avoid clipping.

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.. _class_SoftBody3D_property_pressure_coefficient:

.. rst-class:: classref-property

:ref:`float<class_float>` **pressure_coefficient** = ``0.0`` :ref:`🔗<class_SoftBody3D_property_pressure_coefficient>`

.. rst-class:: classref-property-setget

- |void| **set_pressure_coefficient**\ (\ value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_pressure_coefficient**\ (\ )

The pressure coefficient of this soft body. Simulate pressure build-up from inside this body. Higher values increase the strength of this effect.

.. rst-class:: classref-item-separator

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.. _class_SoftBody3D_property_ray_pickable:

.. rst-class:: classref-property

:ref:`bool<class_bool>` **ray_pickable** = ``true`` :ref:`🔗<class_SoftBody3D_property_ray_pickable>`

.. rst-class:: classref-property-setget

- |void| **set_ray_pickable**\ (\ value\: :ref:`bool<class_bool>`\ )
- :ref:`bool<class_bool>` **is_ray_pickable**\ (\ )

If ``true``, the **SoftBody3D** will respond to :ref:`RayCast3D<class_RayCast3D>`\ s.

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.. _class_SoftBody3D_property_simulation_precision:

.. rst-class:: classref-property

:ref:`int<class_int>` **simulation_precision** = ``5`` :ref:`🔗<class_SoftBody3D_property_simulation_precision>`

.. rst-class:: classref-property-setget

- |void| **set_simulation_precision**\ (\ value\: :ref:`int<class_int>`\ )
- :ref:`int<class_int>` **get_simulation_precision**\ (\ )

Increasing this value will improve the resulting simulation, but can affect performance. Use with care.

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.. _class_SoftBody3D_property_total_mass:

.. rst-class:: classref-property

:ref:`float<class_float>` **total_mass** = ``1.0`` :ref:`🔗<class_SoftBody3D_property_total_mass>`

.. rst-class:: classref-property-setget

- |void| **set_total_mass**\ (\ value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_total_mass**\ (\ )

The SoftBody3D's mass.

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.. rst-class:: classref-descriptions-group

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

.. _class_SoftBody3D_method_add_collision_exception_with:

.. rst-class:: classref-method

|void| **add_collision_exception_with**\ (\ body\: :ref:`Node<class_Node>`\ ) :ref:`🔗<class_SoftBody3D_method_add_collision_exception_with>`

Adds a body to the list of bodies that this body can't collide with.

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.. _class_SoftBody3D_method_get_collision_exceptions:

.. rst-class:: classref-method

:ref:`Array<class_Array>`\[:ref:`PhysicsBody3D<class_PhysicsBody3D>`\] **get_collision_exceptions**\ (\ ) :ref:`🔗<class_SoftBody3D_method_get_collision_exceptions>`

Returns an array of nodes that were added as collision exceptions for this body.

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.. _class_SoftBody3D_method_get_collision_layer_value:

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:ref:`bool<class_bool>` **get_collision_layer_value**\ (\ layer_number\: :ref:`int<class_int>`\ ) |const| :ref:`🔗<class_SoftBody3D_method_get_collision_layer_value>`

Returns whether or not the specified layer of the :ref:`collision_layer<class_SoftBody3D_property_collision_layer>` is enabled, given a ``layer_number`` between 1 and 32.

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.. _class_SoftBody3D_method_get_collision_mask_value:

.. rst-class:: classref-method

:ref:`bool<class_bool>` **get_collision_mask_value**\ (\ layer_number\: :ref:`int<class_int>`\ ) |const| :ref:`🔗<class_SoftBody3D_method_get_collision_mask_value>`

Returns whether or not the specified layer of the :ref:`collision_mask<class_SoftBody3D_property_collision_mask>` is enabled, given a ``layer_number`` between 1 and 32.

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.. _class_SoftBody3D_method_get_physics_rid:

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:ref:`RID<class_RID>` **get_physics_rid**\ (\ ) |const| :ref:`🔗<class_SoftBody3D_method_get_physics_rid>`

Returns the internal :ref:`RID<class_RID>` used by the :ref:`PhysicsServer3D<class_PhysicsServer3D>` for this body.

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.. _class_SoftBody3D_method_get_point_transform:

.. rst-class:: classref-method

:ref:`Vector3<class_Vector3>` **get_point_transform**\ (\ point_index\: :ref:`int<class_int>`\ ) :ref:`🔗<class_SoftBody3D_method_get_point_transform>`

Returns local translation of a vertex in the surface array.

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.. _class_SoftBody3D_method_is_point_pinned:

.. rst-class:: classref-method

:ref:`bool<class_bool>` **is_point_pinned**\ (\ point_index\: :ref:`int<class_int>`\ ) |const| :ref:`🔗<class_SoftBody3D_method_is_point_pinned>`

Returns ``true`` if vertex is set to pinned.

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.. _class_SoftBody3D_method_remove_collision_exception_with:

.. rst-class:: classref-method

|void| **remove_collision_exception_with**\ (\ body\: :ref:`Node<class_Node>`\ ) :ref:`🔗<class_SoftBody3D_method_remove_collision_exception_with>`

Removes a body from the list of bodies that this body can't collide with.

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.. _class_SoftBody3D_method_set_collision_layer_value:

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|void| **set_collision_layer_value**\ (\ layer_number\: :ref:`int<class_int>`, value\: :ref:`bool<class_bool>`\ ) :ref:`🔗<class_SoftBody3D_method_set_collision_layer_value>`

Based on ``value``, enables or disables the specified layer in the :ref:`collision_layer<class_SoftBody3D_property_collision_layer>`, given a ``layer_number`` between 1 and 32.

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.. _class_SoftBody3D_method_set_collision_mask_value:

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|void| **set_collision_mask_value**\ (\ layer_number\: :ref:`int<class_int>`, value\: :ref:`bool<class_bool>`\ ) :ref:`🔗<class_SoftBody3D_method_set_collision_mask_value>`

Based on ``value``, enables or disables the specified layer in the :ref:`collision_mask<class_SoftBody3D_property_collision_mask>`, given a ``layer_number`` between 1 and 32.

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.. _class_SoftBody3D_method_set_point_pinned:

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|void| **set_point_pinned**\ (\ point_index\: :ref:`int<class_int>`, pinned\: :ref:`bool<class_bool>`, attachment_path\: :ref:`NodePath<class_NodePath>` = NodePath(""), insert_at\: :ref:`int<class_int>` = -1\ ) :ref:`🔗<class_SoftBody3D_method_set_point_pinned>`

Sets the pinned state of a surface vertex. When set to ``true``, the optional ``attachment_path`` can define a :ref:`Node3D<class_Node3D>` the pinned vertex will be attached to.

.. |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.)`
.. |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.)`