godot-docs/classes/class_gpuparticles2d.rst

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.. _class_GPUParticles2D:

GPUParticles2D
==============

**Inherits:** :ref:`Node2D<class_Node2D>` **<** :ref:`CanvasItem<class_CanvasItem>` **<** :ref:`Node<class_Node>` **<** :ref:`Object<class_Object>`

A 2D particle emitter.

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

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

2D particle node used to create a variety of particle systems and effects. **GPUParticles2D** features an emitter that generates some number of particles at a given rate.

Use the :ref:`process_material<class_GPUParticles2D_property_process_material>` property to add a :ref:`ParticleProcessMaterial<class_ParticleProcessMaterial>` to configure particle appearance and behavior. Alternatively, you can add a :ref:`ShaderMaterial<class_ShaderMaterial>` which will be applied to all particles.

2D particles can optionally collide with :ref:`LightOccluder2D<class_LightOccluder2D>`, but they don't collide with :ref:`PhysicsBody2D<class_PhysicsBody2D>` nodes.

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

Tutorials
---------

- :doc:`Particle systems (2D) <../tutorials/2d/particle_systems_2d>`

- `2D Particles Demo <https://godotengine.org/asset-library/asset/118>`__

- `2D Dodge The Creeps Demo (uses GPUParticles2D for the trail behind the player) <https://godotengine.org/asset-library/asset/515>`__

.. rst-class:: classref-reftable-group

Properties
----------

.. table::
   :widths: auto

   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`int<class_int>`                           | :ref:`amount<class_GPUParticles2D_property_amount>`                                         | ``8``                           |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`float<class_float>`                       | :ref:`collision_base_size<class_GPUParticles2D_property_collision_base_size>`               | ``1.0``                         |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`DrawOrder<enum_GPUParticles2D_DrawOrder>` | :ref:`draw_order<class_GPUParticles2D_property_draw_order>`                                 | ``1``                           |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`bool<class_bool>`                         | :ref:`emitting<class_GPUParticles2D_property_emitting>`                                     | ``true``                        |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`float<class_float>`                       | :ref:`explosiveness<class_GPUParticles2D_property_explosiveness>`                           | ``0.0``                         |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`int<class_int>`                           | :ref:`fixed_fps<class_GPUParticles2D_property_fixed_fps>`                                   | ``30``                          |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`bool<class_bool>`                         | :ref:`fract_delta<class_GPUParticles2D_property_fract_delta>`                               | ``true``                        |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`bool<class_bool>`                         | :ref:`interpolate<class_GPUParticles2D_property_interpolate>`                               | ``true``                        |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`float<class_float>`                       | :ref:`lifetime<class_GPUParticles2D_property_lifetime>`                                     | ``1.0``                         |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`bool<class_bool>`                         | :ref:`local_coords<class_GPUParticles2D_property_local_coords>`                             | ``false``                       |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`bool<class_bool>`                         | :ref:`one_shot<class_GPUParticles2D_property_one_shot>`                                     | ``false``                       |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`float<class_float>`                       | :ref:`preprocess<class_GPUParticles2D_property_preprocess>`                                 | ``0.0``                         |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`Material<class_Material>`                 | :ref:`process_material<class_GPUParticles2D_property_process_material>`                     |                                 |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`float<class_float>`                       | :ref:`randomness<class_GPUParticles2D_property_randomness>`                                 | ``0.0``                         |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`float<class_float>`                       | :ref:`speed_scale<class_GPUParticles2D_property_speed_scale>`                               | ``1.0``                         |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`NodePath<class_NodePath>`                 | :ref:`sub_emitter<class_GPUParticles2D_property_sub_emitter>`                               | ``NodePath("")``                |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`Texture2D<class_Texture2D>`               | :ref:`texture<class_GPUParticles2D_property_texture>`                                       |                                 |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`bool<class_bool>`                         | :ref:`trail_enabled<class_GPUParticles2D_property_trail_enabled>`                           | ``false``                       |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`float<class_float>`                       | :ref:`trail_lifetime<class_GPUParticles2D_property_trail_lifetime>`                         | ``0.3``                         |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`int<class_int>`                           | :ref:`trail_section_subdivisions<class_GPUParticles2D_property_trail_section_subdivisions>` | ``4``                           |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`int<class_int>`                           | :ref:`trail_sections<class_GPUParticles2D_property_trail_sections>`                         | ``8``                           |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
   | :ref:`Rect2<class_Rect2>`                       | :ref:`visibility_rect<class_GPUParticles2D_property_visibility_rect>`                       | ``Rect2(-100, -100, 200, 200)`` |
   +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+

.. rst-class:: classref-reftable-group

Methods
-------

.. table::
   :widths: auto

   +---------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`Rect2<class_Rect2>` | :ref:`capture_rect<class_GPUParticles2D_method_capture_rect>` **(** **)** |const|                                                                                                                                                                               |
   +---------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                      | :ref:`convert_from_particles<class_GPUParticles2D_method_convert_from_particles>` **(** :ref:`Node<class_Node>` particles **)**                                                                                                                                 |
   +---------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                      | :ref:`emit_particle<class_GPUParticles2D_method_emit_particle>` **(** :ref:`Transform2D<class_Transform2D>` xform, :ref:`Vector2<class_Vector2>` velocity, :ref:`Color<class_Color>` color, :ref:`Color<class_Color>` custom, :ref:`int<class_int>` flags **)** |
   +---------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                      | :ref:`restart<class_GPUParticles2D_method_restart>` **(** **)**                                                                                                                                                                                                 |
   +---------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

.. rst-class:: classref-section-separator

----

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

Signals
-------

.. _class_GPUParticles2D_signal_finished:

.. rst-class:: classref-signal

**finished** **(** **)**

Emitted when all active particles have finished processing. When :ref:`one_shot<class_GPUParticles2D_property_one_shot>` is disabled, particles will process continuously, so this is never emitted.

\ **Note:** Due to the particles being computed on the GPU there might be a delay before the signal gets emitted.

.. rst-class:: classref-section-separator

----

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

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

.. _enum_GPUParticles2D_DrawOrder:

.. rst-class:: classref-enumeration

enum **DrawOrder**:

.. _class_GPUParticles2D_constant_DRAW_ORDER_INDEX:

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

:ref:`DrawOrder<enum_GPUParticles2D_DrawOrder>` **DRAW_ORDER_INDEX** = ``0``

Particles are drawn in the order emitted.

.. _class_GPUParticles2D_constant_DRAW_ORDER_LIFETIME:

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

:ref:`DrawOrder<enum_GPUParticles2D_DrawOrder>` **DRAW_ORDER_LIFETIME** = ``1``

Particles are drawn in order of remaining lifetime.

.. _class_GPUParticles2D_constant_DRAW_ORDER_REVERSE_LIFETIME:

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

:ref:`DrawOrder<enum_GPUParticles2D_DrawOrder>` **DRAW_ORDER_REVERSE_LIFETIME** = ``2``



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

----

.. _enum_GPUParticles2D_EmitFlags:

.. rst-class:: classref-enumeration

enum **EmitFlags**:

.. _class_GPUParticles2D_constant_EMIT_FLAG_POSITION:

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

:ref:`EmitFlags<enum_GPUParticles2D_EmitFlags>` **EMIT_FLAG_POSITION** = ``1``

Particle starts at the specified position.

.. _class_GPUParticles2D_constant_EMIT_FLAG_ROTATION_SCALE:

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

:ref:`EmitFlags<enum_GPUParticles2D_EmitFlags>` **EMIT_FLAG_ROTATION_SCALE** = ``2``

Particle starts with specified rotation and scale.

.. _class_GPUParticles2D_constant_EMIT_FLAG_VELOCITY:

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

:ref:`EmitFlags<enum_GPUParticles2D_EmitFlags>` **EMIT_FLAG_VELOCITY** = ``4``

Particle starts with the specified velocity vector, which defines the emission direction and speed.

.. _class_GPUParticles2D_constant_EMIT_FLAG_COLOR:

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

:ref:`EmitFlags<enum_GPUParticles2D_EmitFlags>` **EMIT_FLAG_COLOR** = ``8``

Particle starts with specified color.

.. _class_GPUParticles2D_constant_EMIT_FLAG_CUSTOM:

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

:ref:`EmitFlags<enum_GPUParticles2D_EmitFlags>` **EMIT_FLAG_CUSTOM** = ``16``

Particle starts with specified ``CUSTOM`` data.

.. rst-class:: classref-section-separator

----

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

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

.. _class_GPUParticles2D_property_amount:

.. rst-class:: classref-property

:ref:`int<class_int>` **amount** = ``8``

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

- void **set_amount** **(** :ref:`int<class_int>` value **)**
- :ref:`int<class_int>` **get_amount** **(** **)**

Number of particles emitted in one emission cycle.

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

----

.. _class_GPUParticles2D_property_collision_base_size:

.. rst-class:: classref-property

:ref:`float<class_float>` **collision_base_size** = ``1.0``

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

- void **set_collision_base_size** **(** :ref:`float<class_float>` value **)**
- :ref:`float<class_float>` **get_collision_base_size** **(** **)**

Multiplier for particle's collision radius. ``1.0`` corresponds to the size of the sprite.

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

----

.. _class_GPUParticles2D_property_draw_order:

.. rst-class:: classref-property

:ref:`DrawOrder<enum_GPUParticles2D_DrawOrder>` **draw_order** = ``1``

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

- void **set_draw_order** **(** :ref:`DrawOrder<enum_GPUParticles2D_DrawOrder>` value **)**
- :ref:`DrawOrder<enum_GPUParticles2D_DrawOrder>` **get_draw_order** **(** **)**

Particle draw order. Uses :ref:`DrawOrder<enum_GPUParticles2D_DrawOrder>` values.

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

----

.. _class_GPUParticles2D_property_emitting:

.. rst-class:: classref-property

:ref:`bool<class_bool>` **emitting** = ``true``

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

- void **set_emitting** **(** :ref:`bool<class_bool>` value **)**
- :ref:`bool<class_bool>` **is_emitting** **(** **)**

If ``true``, particles are being emitted. :ref:`emitting<class_GPUParticles2D_property_emitting>` can be used to start and stop particles from emitting. However, if :ref:`one_shot<class_GPUParticles2D_property_one_shot>` is ``true`` setting :ref:`emitting<class_GPUParticles2D_property_emitting>` to ``true`` will not restart the emission cycle until after all active particles finish processing. You can use the :ref:`finished<class_GPUParticles2D_signal_finished>` signal to be notified once all active particles finish processing.

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

----

.. _class_GPUParticles2D_property_explosiveness:

.. rst-class:: classref-property

:ref:`float<class_float>` **explosiveness** = ``0.0``

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

- void **set_explosiveness_ratio** **(** :ref:`float<class_float>` value **)**
- :ref:`float<class_float>` **get_explosiveness_ratio** **(** **)**

How rapidly particles in an emission cycle are emitted. If greater than ``0``, there will be a gap in emissions before the next cycle begins.

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

----

.. _class_GPUParticles2D_property_fixed_fps:

.. rst-class:: classref-property

:ref:`int<class_int>` **fixed_fps** = ``30``

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

- void **set_fixed_fps** **(** :ref:`int<class_int>` value **)**
- :ref:`int<class_int>` **get_fixed_fps** **(** **)**

The particle system's frame rate is fixed to a value. For example, changing the value to 2 will make the particles render at 2 frames per second. Note this does not slow down the simulation of the particle system itself.

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

----

.. _class_GPUParticles2D_property_fract_delta:

.. rst-class:: classref-property

:ref:`bool<class_bool>` **fract_delta** = ``true``

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

- void **set_fractional_delta** **(** :ref:`bool<class_bool>` value **)**
- :ref:`bool<class_bool>` **get_fractional_delta** **(** **)**

If ``true``, results in fractional delta calculation which has a smoother particles display effect.

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

----

.. _class_GPUParticles2D_property_interpolate:

.. rst-class:: classref-property

:ref:`bool<class_bool>` **interpolate** = ``true``

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

- void **set_interpolate** **(** :ref:`bool<class_bool>` value **)**
- :ref:`bool<class_bool>` **get_interpolate** **(** **)**

Enables particle interpolation, which makes the particle movement smoother when their :ref:`fixed_fps<class_GPUParticles2D_property_fixed_fps>` is lower than the screen refresh rate.

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

----

.. _class_GPUParticles2D_property_lifetime:

.. rst-class:: classref-property

:ref:`float<class_float>` **lifetime** = ``1.0``

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

- void **set_lifetime** **(** :ref:`float<class_float>` value **)**
- :ref:`float<class_float>` **get_lifetime** **(** **)**

Amount of time each particle will exist.

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

----

.. _class_GPUParticles2D_property_local_coords:

.. rst-class:: classref-property

:ref:`bool<class_bool>` **local_coords** = ``false``

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

- void **set_use_local_coordinates** **(** :ref:`bool<class_bool>` value **)**
- :ref:`bool<class_bool>` **get_use_local_coordinates** **(** **)**

If ``true``, particles use the parent node's coordinate space (known as local coordinates). This will cause particles to move and rotate along the **GPUParticles2D** node (and its parents) when it is moved or rotated. If ``false``, particles use global coordinates; they will not move or rotate along the **GPUParticles2D** node (and its parents) when it is moved or rotated.

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

----

.. _class_GPUParticles2D_property_one_shot:

.. rst-class:: classref-property

:ref:`bool<class_bool>` **one_shot** = ``false``

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

- void **set_one_shot** **(** :ref:`bool<class_bool>` value **)**
- :ref:`bool<class_bool>` **get_one_shot** **(** **)**

If ``true``, only one emission cycle occurs. If set ``true`` during a cycle, emission will stop at the cycle's end.

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

----

.. _class_GPUParticles2D_property_preprocess:

.. rst-class:: classref-property

:ref:`float<class_float>` **preprocess** = ``0.0``

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

- void **set_pre_process_time** **(** :ref:`float<class_float>` value **)**
- :ref:`float<class_float>` **get_pre_process_time** **(** **)**

Particle system starts as if it had already run for this many seconds.

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

----

.. _class_GPUParticles2D_property_process_material:

.. rst-class:: classref-property

:ref:`Material<class_Material>` **process_material**

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

- void **set_process_material** **(** :ref:`Material<class_Material>` value **)**
- :ref:`Material<class_Material>` **get_process_material** **(** **)**

:ref:`Material<class_Material>` for processing particles. Can be a :ref:`ParticleProcessMaterial<class_ParticleProcessMaterial>` or a :ref:`ShaderMaterial<class_ShaderMaterial>`.

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

----

.. _class_GPUParticles2D_property_randomness:

.. rst-class:: classref-property

:ref:`float<class_float>` **randomness** = ``0.0``

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

- void **set_randomness_ratio** **(** :ref:`float<class_float>` value **)**
- :ref:`float<class_float>` **get_randomness_ratio** **(** **)**

Emission lifetime randomness ratio.

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

----

.. _class_GPUParticles2D_property_speed_scale:

.. rst-class:: classref-property

:ref:`float<class_float>` **speed_scale** = ``1.0``

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

- void **set_speed_scale** **(** :ref:`float<class_float>` value **)**
- :ref:`float<class_float>` **get_speed_scale** **(** **)**

Particle system's running speed scaling ratio. A value of ``0`` can be used to pause the particles.

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

----

.. _class_GPUParticles2D_property_sub_emitter:

.. rst-class:: classref-property

:ref:`NodePath<class_NodePath>` **sub_emitter** = ``NodePath("")``

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

- void **set_sub_emitter** **(** :ref:`NodePath<class_NodePath>` value **)**
- :ref:`NodePath<class_NodePath>` **get_sub_emitter** **(** **)**

The :ref:`NodePath<class_NodePath>` to the **GPUParticles2D** used for sub-emissions.

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

----

.. _class_GPUParticles2D_property_texture:

.. rst-class:: classref-property

:ref:`Texture2D<class_Texture2D>` **texture**

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

- void **set_texture** **(** :ref:`Texture2D<class_Texture2D>` value **)**
- :ref:`Texture2D<class_Texture2D>` **get_texture** **(** **)**

Particle texture. If ``null``, particles will be squares.

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

----

.. _class_GPUParticles2D_property_trail_enabled:

.. rst-class:: classref-property

:ref:`bool<class_bool>` **trail_enabled** = ``false``

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

- void **set_trail_enabled** **(** :ref:`bool<class_bool>` value **)**
- :ref:`bool<class_bool>` **is_trail_enabled** **(** **)**

If ``true``, enables particle trails using a mesh skinning system.

\ **Note:** Unlike :ref:`GPUParticles3D<class_GPUParticles3D>`, the number of trail sections and subdivisions is set with the :ref:`trail_sections<class_GPUParticles2D_property_trail_sections>` and :ref:`trail_section_subdivisions<class_GPUParticles2D_property_trail_section_subdivisions>` properties.

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

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.. _class_GPUParticles2D_property_trail_lifetime:

.. rst-class:: classref-property

:ref:`float<class_float>` **trail_lifetime** = ``0.3``

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

- void **set_trail_lifetime** **(** :ref:`float<class_float>` value **)**
- :ref:`float<class_float>` **get_trail_lifetime** **(** **)**

The amount of time the particle's trail should represent (in seconds). Only effective if :ref:`trail_enabled<class_GPUParticles2D_property_trail_enabled>` is ``true``.

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

----

.. _class_GPUParticles2D_property_trail_section_subdivisions:

.. rst-class:: classref-property

:ref:`int<class_int>` **trail_section_subdivisions** = ``4``

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

- void **set_trail_section_subdivisions** **(** :ref:`int<class_int>` value **)**
- :ref:`int<class_int>` **get_trail_section_subdivisions** **(** **)**

The number of subdivisions to use for the particle trail rendering. Higher values can result in smoother trail curves, at the cost of performance due to increased mesh complexity. See also :ref:`trail_sections<class_GPUParticles2D_property_trail_sections>`. Only effective if :ref:`trail_enabled<class_GPUParticles2D_property_trail_enabled>` is ``true``.

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

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.. _class_GPUParticles2D_property_trail_sections:

.. rst-class:: classref-property

:ref:`int<class_int>` **trail_sections** = ``8``

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

- void **set_trail_sections** **(** :ref:`int<class_int>` value **)**
- :ref:`int<class_int>` **get_trail_sections** **(** **)**

The number of sections to use for the particle trail rendering. Higher values can result in smoother trail curves, at the cost of performance due to increased mesh complexity. See also :ref:`trail_section_subdivisions<class_GPUParticles2D_property_trail_section_subdivisions>`. Only effective if :ref:`trail_enabled<class_GPUParticles2D_property_trail_enabled>` is ``true``.

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

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.. _class_GPUParticles2D_property_visibility_rect:

.. rst-class:: classref-property

:ref:`Rect2<class_Rect2>` **visibility_rect** = ``Rect2(-100, -100, 200, 200)``

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

- void **set_visibility_rect** **(** :ref:`Rect2<class_Rect2>` value **)**
- :ref:`Rect2<class_Rect2>` **get_visibility_rect** **(** **)**

The :ref:`Rect2<class_Rect2>` that determines the node's region which needs to be visible on screen for the particle system to be active.

Grow the rect if particles suddenly appear/disappear when the node enters/exits the screen. The :ref:`Rect2<class_Rect2>` can be grown via code or with the **Particles → Generate Visibility Rect** editor tool.

.. rst-class:: classref-section-separator

----

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

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

.. _class_GPUParticles2D_method_capture_rect:

.. rst-class:: classref-method

:ref:`Rect2<class_Rect2>` **capture_rect** **(** **)** |const|

Returns a rectangle containing the positions of all existing particles.

\ **Note:** When using threaded rendering this method synchronizes the rendering thread. Calling it often may have a negative impact on performance.

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

----

.. _class_GPUParticles2D_method_convert_from_particles:

.. rst-class:: classref-method

void **convert_from_particles** **(** :ref:`Node<class_Node>` particles **)**

Sets this node's properties to match a given :ref:`CPUParticles2D<class_CPUParticles2D>` node.

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

----

.. _class_GPUParticles2D_method_emit_particle:

.. rst-class:: classref-method

void **emit_particle** **(** :ref:`Transform2D<class_Transform2D>` xform, :ref:`Vector2<class_Vector2>` velocity, :ref:`Color<class_Color>` color, :ref:`Color<class_Color>` custom, :ref:`int<class_int>` flags **)**

Emits a single particle. Whether ``xform``, ``velocity``, ``color`` and ``custom`` are applied depends on the value of ``flags``. See :ref:`EmitFlags<enum_GPUParticles2D_EmitFlags>`.

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

----

.. _class_GPUParticles2D_method_restart:

.. rst-class:: classref-method

void **restart** **(** **)**

Restarts all the existing particles.

.. |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.)`