godot-docs/classes/class_cpuparticles2d.rst

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.. _class_CPUParticles2D:

CPUParticles2D
==============

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

A CPU-based 2D particle emitter.

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

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

CPU-based 2D particle node used to create a variety of particle systems and effects.

See also :ref:`GPUParticles2D<class_GPUParticles2D>`, which provides the same functionality with hardware acceleration, but may not run on older devices.

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

Tutorials
---------

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

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

Properties
----------

.. table::
   :widths: auto

   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`int<class_int>`                                   | :ref:`amount<class_CPUParticles2D_property_amount>`                                 | ``8``                 |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Curve<class_Curve>`                               | :ref:`angle_curve<class_CPUParticles2D_property_angle_curve>`                       |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`angle_max<class_CPUParticles2D_property_angle_max>`                           | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`angle_min<class_CPUParticles2D_property_angle_min>`                           | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Curve<class_Curve>`                               | :ref:`angular_velocity_curve<class_CPUParticles2D_property_angular_velocity_curve>` |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`angular_velocity_max<class_CPUParticles2D_property_angular_velocity_max>`     | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`angular_velocity_min<class_CPUParticles2D_property_angular_velocity_min>`     | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Curve<class_Curve>`                               | :ref:`anim_offset_curve<class_CPUParticles2D_property_anim_offset_curve>`           |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`anim_offset_max<class_CPUParticles2D_property_anim_offset_max>`               | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`anim_offset_min<class_CPUParticles2D_property_anim_offset_min>`               | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Curve<class_Curve>`                               | :ref:`anim_speed_curve<class_CPUParticles2D_property_anim_speed_curve>`             |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`anim_speed_max<class_CPUParticles2D_property_anim_speed_max>`                 | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`anim_speed_min<class_CPUParticles2D_property_anim_speed_min>`                 | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Color<class_Color>`                               | :ref:`color<class_CPUParticles2D_property_color>`                                   | ``Color(1, 1, 1, 1)`` |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Gradient<class_Gradient>`                         | :ref:`color_initial_ramp<class_CPUParticles2D_property_color_initial_ramp>`         |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Gradient<class_Gradient>`                         | :ref:`color_ramp<class_CPUParticles2D_property_color_ramp>`                         |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Curve<class_Curve>`                               | :ref:`damping_curve<class_CPUParticles2D_property_damping_curve>`                   |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`damping_max<class_CPUParticles2D_property_damping_max>`                       | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`damping_min<class_CPUParticles2D_property_damping_min>`                       | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Vector2<class_Vector2>`                           | :ref:`direction<class_CPUParticles2D_property_direction>`                           | ``Vector2(1, 0)``     |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`DrawOrder<enum_CPUParticles2D_DrawOrder>`         | :ref:`draw_order<class_CPUParticles2D_property_draw_order>`                         | ``0``                 |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`PackedColorArray<class_PackedColorArray>`         | :ref:`emission_colors<class_CPUParticles2D_property_emission_colors>`               |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`PackedVector2Array<class_PackedVector2Array>`     | :ref:`emission_normals<class_CPUParticles2D_property_emission_normals>`             |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`PackedVector2Array<class_PackedVector2Array>`     | :ref:`emission_points<class_CPUParticles2D_property_emission_points>`               |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Vector2<class_Vector2>`                           | :ref:`emission_rect_extents<class_CPUParticles2D_property_emission_rect_extents>`   |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`EmissionShape<enum_CPUParticles2D_EmissionShape>` | :ref:`emission_shape<class_CPUParticles2D_property_emission_shape>`                 | ``0``                 |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`emission_sphere_radius<class_CPUParticles2D_property_emission_sphere_radius>` |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`bool<class_bool>`                                 | :ref:`emitting<class_CPUParticles2D_property_emitting>`                             | ``true``              |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`explosiveness<class_CPUParticles2D_property_explosiveness>`                   | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`int<class_int>`                                   | :ref:`fixed_fps<class_CPUParticles2D_property_fixed_fps>`                           | ``0``                 |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`bool<class_bool>`                                 | :ref:`fract_delta<class_CPUParticles2D_property_fract_delta>`                       | ``true``              |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Vector2<class_Vector2>`                           | :ref:`gravity<class_CPUParticles2D_property_gravity>`                               | ``Vector2(0, 980)``   |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Curve<class_Curve>`                               | :ref:`hue_variation_curve<class_CPUParticles2D_property_hue_variation_curve>`       |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`hue_variation_max<class_CPUParticles2D_property_hue_variation_max>`           | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`hue_variation_min<class_CPUParticles2D_property_hue_variation_min>`           | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`initial_velocity_max<class_CPUParticles2D_property_initial_velocity_max>`     | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`initial_velocity_min<class_CPUParticles2D_property_initial_velocity_min>`     | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`lifetime<class_CPUParticles2D_property_lifetime>`                             | ``1.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`lifetime_randomness<class_CPUParticles2D_property_lifetime_randomness>`       | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Curve<class_Curve>`                               | :ref:`linear_accel_curve<class_CPUParticles2D_property_linear_accel_curve>`         |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`linear_accel_max<class_CPUParticles2D_property_linear_accel_max>`             | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`linear_accel_min<class_CPUParticles2D_property_linear_accel_min>`             | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`bool<class_bool>`                                 | :ref:`local_coords<class_CPUParticles2D_property_local_coords>`                     | ``false``             |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`bool<class_bool>`                                 | :ref:`one_shot<class_CPUParticles2D_property_one_shot>`                             | ``false``             |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Curve<class_Curve>`                               | :ref:`orbit_velocity_curve<class_CPUParticles2D_property_orbit_velocity_curve>`     |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`orbit_velocity_max<class_CPUParticles2D_property_orbit_velocity_max>`         | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`orbit_velocity_min<class_CPUParticles2D_property_orbit_velocity_min>`         | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`bool<class_bool>`                                 | :ref:`particle_flag_align_y<class_CPUParticles2D_property_particle_flag_align_y>`   | ``false``             |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`preprocess<class_CPUParticles2D_property_preprocess>`                         | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Curve<class_Curve>`                               | :ref:`radial_accel_curve<class_CPUParticles2D_property_radial_accel_curve>`         |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`radial_accel_max<class_CPUParticles2D_property_radial_accel_max>`             | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`radial_accel_min<class_CPUParticles2D_property_radial_accel_min>`             | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`randomness<class_CPUParticles2D_property_randomness>`                         | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Curve<class_Curve>`                               | :ref:`scale_amount_curve<class_CPUParticles2D_property_scale_amount_curve>`         |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`scale_amount_max<class_CPUParticles2D_property_scale_amount_max>`             | ``1.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`scale_amount_min<class_CPUParticles2D_property_scale_amount_min>`             | ``1.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Curve<class_Curve>`                               | :ref:`scale_curve_x<class_CPUParticles2D_property_scale_curve_x>`                   |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Curve<class_Curve>`                               | :ref:`scale_curve_y<class_CPUParticles2D_property_scale_curve_y>`                   |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`int<class_int>`                                   | :ref:`seed<class_CPUParticles2D_property_seed>`                                     | ``0``                 |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`speed_scale<class_CPUParticles2D_property_speed_scale>`                       | ``1.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`bool<class_bool>`                                 | :ref:`split_scale<class_CPUParticles2D_property_split_scale>`                       | ``false``             |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`spread<class_CPUParticles2D_property_spread>`                                 | ``45.0``              |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Curve<class_Curve>`                               | :ref:`tangential_accel_curve<class_CPUParticles2D_property_tangential_accel_curve>` |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`tangential_accel_max<class_CPUParticles2D_property_tangential_accel_max>`     | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`float<class_float>`                               | :ref:`tangential_accel_min<class_CPUParticles2D_property_tangential_accel_min>`     | ``0.0``               |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`Texture2D<class_Texture2D>`                       | :ref:`texture<class_CPUParticles2D_property_texture>`                               |                       |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+
   | :ref:`bool<class_bool>`                                 | :ref:`use_fixed_seed<class_CPUParticles2D_property_use_fixed_seed>`                 | ``false``             |
   +---------------------------------------------------------+-------------------------------------------------------------------------------------+-----------------------+

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

Methods
-------

.. table::
   :widths: auto

   +---------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | |void|                    | :ref:`convert_from_particles<class_CPUParticles2D_method_convert_from_particles>`\ (\ particles\: :ref:`Node<class_Node>`\ )                                                             |
   +---------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`Curve<class_Curve>` | :ref:`get_param_curve<class_CPUParticles2D_method_get_param_curve>`\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|                                               |
   +---------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`float<class_float>` | :ref:`get_param_max<class_CPUParticles2D_method_get_param_max>`\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|                                                   |
   +---------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`float<class_float>` | :ref:`get_param_min<class_CPUParticles2D_method_get_param_min>`\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|                                                   |
   +---------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`bool<class_bool>`   | :ref:`get_particle_flag<class_CPUParticles2D_method_get_particle_flag>`\ (\ particle_flag\: :ref:`ParticleFlags<enum_CPUParticles2D_ParticleFlags>`\ ) |const|                           |
   +---------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | |void|                    | :ref:`request_particles_process<class_CPUParticles2D_method_request_particles_process>`\ (\ process_time\: :ref:`float<class_float>`\ )                                                  |
   +---------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | |void|                    | :ref:`restart<class_CPUParticles2D_method_restart>`\ (\ keep_seed\: :ref:`bool<class_bool>` = false\ )                                                                                   |
   +---------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | |void|                    | :ref:`set_param_curve<class_CPUParticles2D_method_set_param_curve>`\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, curve\: :ref:`Curve<class_Curve>`\ )                    |
   +---------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | |void|                    | :ref:`set_param_max<class_CPUParticles2D_method_set_param_max>`\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )                        |
   +---------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | |void|                    | :ref:`set_param_min<class_CPUParticles2D_method_set_param_min>`\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )                        |
   +---------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | |void|                    | :ref:`set_particle_flag<class_CPUParticles2D_method_set_particle_flag>`\ (\ particle_flag\: :ref:`ParticleFlags<enum_CPUParticles2D_ParticleFlags>`, enable\: :ref:`bool<class_bool>`\ ) |
   +---------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

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

----

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

Signals
-------

.. _class_CPUParticles2D_signal_finished:

.. rst-class:: classref-signal

**finished**\ (\ ) :ref:`🔗<class_CPUParticles2D_signal_finished>`

Emitted when all active particles have finished processing. When :ref:`one_shot<class_CPUParticles2D_property_one_shot>` is disabled, particles will process continuously, so this is never emitted.

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

----

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

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

.. _enum_CPUParticles2D_DrawOrder:

.. rst-class:: classref-enumeration

enum **DrawOrder**: :ref:`🔗<enum_CPUParticles2D_DrawOrder>`

.. _class_CPUParticles2D_constant_DRAW_ORDER_INDEX:

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

:ref:`DrawOrder<enum_CPUParticles2D_DrawOrder>` **DRAW_ORDER_INDEX** = ``0``

Particles are drawn in the order emitted.

.. _class_CPUParticles2D_constant_DRAW_ORDER_LIFETIME:

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

:ref:`DrawOrder<enum_CPUParticles2D_DrawOrder>` **DRAW_ORDER_LIFETIME** = ``1``

Particles are drawn in order of remaining lifetime. In other words, the particle with the highest lifetime is drawn at the front.

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

----

.. _enum_CPUParticles2D_Parameter:

.. rst-class:: classref-enumeration

enum **Parameter**: :ref:`🔗<enum_CPUParticles2D_Parameter>`

.. _class_CPUParticles2D_constant_PARAM_INITIAL_LINEAR_VELOCITY:

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

:ref:`Parameter<enum_CPUParticles2D_Parameter>` **PARAM_INITIAL_LINEAR_VELOCITY** = ``0``

Use with :ref:`set_param_min<class_CPUParticles2D_method_set_param_min>`, :ref:`set_param_max<class_CPUParticles2D_method_set_param_max>`, and :ref:`set_param_curve<class_CPUParticles2D_method_set_param_curve>` to set initial velocity properties.

.. _class_CPUParticles2D_constant_PARAM_ANGULAR_VELOCITY:

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

:ref:`Parameter<enum_CPUParticles2D_Parameter>` **PARAM_ANGULAR_VELOCITY** = ``1``

Use with :ref:`set_param_min<class_CPUParticles2D_method_set_param_min>`, :ref:`set_param_max<class_CPUParticles2D_method_set_param_max>`, and :ref:`set_param_curve<class_CPUParticles2D_method_set_param_curve>` to set angular velocity properties.

.. _class_CPUParticles2D_constant_PARAM_ORBIT_VELOCITY:

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

:ref:`Parameter<enum_CPUParticles2D_Parameter>` **PARAM_ORBIT_VELOCITY** = ``2``

Use with :ref:`set_param_min<class_CPUParticles2D_method_set_param_min>`, :ref:`set_param_max<class_CPUParticles2D_method_set_param_max>`, and :ref:`set_param_curve<class_CPUParticles2D_method_set_param_curve>` to set orbital velocity properties.

.. _class_CPUParticles2D_constant_PARAM_LINEAR_ACCEL:

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

:ref:`Parameter<enum_CPUParticles2D_Parameter>` **PARAM_LINEAR_ACCEL** = ``3``

Use with :ref:`set_param_min<class_CPUParticles2D_method_set_param_min>`, :ref:`set_param_max<class_CPUParticles2D_method_set_param_max>`, and :ref:`set_param_curve<class_CPUParticles2D_method_set_param_curve>` to set linear acceleration properties.

.. _class_CPUParticles2D_constant_PARAM_RADIAL_ACCEL:

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

:ref:`Parameter<enum_CPUParticles2D_Parameter>` **PARAM_RADIAL_ACCEL** = ``4``

Use with :ref:`set_param_min<class_CPUParticles2D_method_set_param_min>`, :ref:`set_param_max<class_CPUParticles2D_method_set_param_max>`, and :ref:`set_param_curve<class_CPUParticles2D_method_set_param_curve>` to set radial acceleration properties.

.. _class_CPUParticles2D_constant_PARAM_TANGENTIAL_ACCEL:

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

:ref:`Parameter<enum_CPUParticles2D_Parameter>` **PARAM_TANGENTIAL_ACCEL** = ``5``

Use with :ref:`set_param_min<class_CPUParticles2D_method_set_param_min>`, :ref:`set_param_max<class_CPUParticles2D_method_set_param_max>`, and :ref:`set_param_curve<class_CPUParticles2D_method_set_param_curve>` to set tangential acceleration properties.

.. _class_CPUParticles2D_constant_PARAM_DAMPING:

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

:ref:`Parameter<enum_CPUParticles2D_Parameter>` **PARAM_DAMPING** = ``6``

Use with :ref:`set_param_min<class_CPUParticles2D_method_set_param_min>`, :ref:`set_param_max<class_CPUParticles2D_method_set_param_max>`, and :ref:`set_param_curve<class_CPUParticles2D_method_set_param_curve>` to set damping properties.

.. _class_CPUParticles2D_constant_PARAM_ANGLE:

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

:ref:`Parameter<enum_CPUParticles2D_Parameter>` **PARAM_ANGLE** = ``7``

Use with :ref:`set_param_min<class_CPUParticles2D_method_set_param_min>`, :ref:`set_param_max<class_CPUParticles2D_method_set_param_max>`, and :ref:`set_param_curve<class_CPUParticles2D_method_set_param_curve>` to set angle properties.

.. _class_CPUParticles2D_constant_PARAM_SCALE:

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

:ref:`Parameter<enum_CPUParticles2D_Parameter>` **PARAM_SCALE** = ``8``

Use with :ref:`set_param_min<class_CPUParticles2D_method_set_param_min>`, :ref:`set_param_max<class_CPUParticles2D_method_set_param_max>`, and :ref:`set_param_curve<class_CPUParticles2D_method_set_param_curve>` to set scale properties.

.. _class_CPUParticles2D_constant_PARAM_HUE_VARIATION:

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

:ref:`Parameter<enum_CPUParticles2D_Parameter>` **PARAM_HUE_VARIATION** = ``9``

Use with :ref:`set_param_min<class_CPUParticles2D_method_set_param_min>`, :ref:`set_param_max<class_CPUParticles2D_method_set_param_max>`, and :ref:`set_param_curve<class_CPUParticles2D_method_set_param_curve>` to set hue variation properties.

.. _class_CPUParticles2D_constant_PARAM_ANIM_SPEED:

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

:ref:`Parameter<enum_CPUParticles2D_Parameter>` **PARAM_ANIM_SPEED** = ``10``

Use with :ref:`set_param_min<class_CPUParticles2D_method_set_param_min>`, :ref:`set_param_max<class_CPUParticles2D_method_set_param_max>`, and :ref:`set_param_curve<class_CPUParticles2D_method_set_param_curve>` to set animation speed properties.

.. _class_CPUParticles2D_constant_PARAM_ANIM_OFFSET:

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

:ref:`Parameter<enum_CPUParticles2D_Parameter>` **PARAM_ANIM_OFFSET** = ``11``

Use with :ref:`set_param_min<class_CPUParticles2D_method_set_param_min>`, :ref:`set_param_max<class_CPUParticles2D_method_set_param_max>`, and :ref:`set_param_curve<class_CPUParticles2D_method_set_param_curve>` to set animation offset properties.

.. _class_CPUParticles2D_constant_PARAM_MAX:

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

:ref:`Parameter<enum_CPUParticles2D_Parameter>` **PARAM_MAX** = ``12``

Represents the size of the :ref:`Parameter<enum_CPUParticles2D_Parameter>` enum.

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

----

.. _enum_CPUParticles2D_ParticleFlags:

.. rst-class:: classref-enumeration

enum **ParticleFlags**: :ref:`🔗<enum_CPUParticles2D_ParticleFlags>`

.. _class_CPUParticles2D_constant_PARTICLE_FLAG_ALIGN_Y_TO_VELOCITY:

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

:ref:`ParticleFlags<enum_CPUParticles2D_ParticleFlags>` **PARTICLE_FLAG_ALIGN_Y_TO_VELOCITY** = ``0``

Use with :ref:`set_particle_flag<class_CPUParticles2D_method_set_particle_flag>` to set :ref:`particle_flag_align_y<class_CPUParticles2D_property_particle_flag_align_y>`.

.. _class_CPUParticles2D_constant_PARTICLE_FLAG_ROTATE_Y:

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

:ref:`ParticleFlags<enum_CPUParticles2D_ParticleFlags>` **PARTICLE_FLAG_ROTATE_Y** = ``1``

Present for consistency with 3D particle nodes, not used in 2D.

.. _class_CPUParticles2D_constant_PARTICLE_FLAG_DISABLE_Z:

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

:ref:`ParticleFlags<enum_CPUParticles2D_ParticleFlags>` **PARTICLE_FLAG_DISABLE_Z** = ``2``

Present for consistency with 3D particle nodes, not used in 2D.

.. _class_CPUParticles2D_constant_PARTICLE_FLAG_MAX:

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

:ref:`ParticleFlags<enum_CPUParticles2D_ParticleFlags>` **PARTICLE_FLAG_MAX** = ``3``

Represents the size of the :ref:`ParticleFlags<enum_CPUParticles2D_ParticleFlags>` enum.

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

----

.. _enum_CPUParticles2D_EmissionShape:

.. rst-class:: classref-enumeration

enum **EmissionShape**: :ref:`🔗<enum_CPUParticles2D_EmissionShape>`

.. _class_CPUParticles2D_constant_EMISSION_SHAPE_POINT:

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

:ref:`EmissionShape<enum_CPUParticles2D_EmissionShape>` **EMISSION_SHAPE_POINT** = ``0``

All particles will be emitted from a single point.

.. _class_CPUParticles2D_constant_EMISSION_SHAPE_SPHERE:

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

:ref:`EmissionShape<enum_CPUParticles2D_EmissionShape>` **EMISSION_SHAPE_SPHERE** = ``1``

Particles will be emitted in the volume of a sphere flattened to two dimensions.

.. _class_CPUParticles2D_constant_EMISSION_SHAPE_SPHERE_SURFACE:

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

:ref:`EmissionShape<enum_CPUParticles2D_EmissionShape>` **EMISSION_SHAPE_SPHERE_SURFACE** = ``2``

Particles will be emitted on the surface of a sphere flattened to two dimensions.

.. _class_CPUParticles2D_constant_EMISSION_SHAPE_RECTANGLE:

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

:ref:`EmissionShape<enum_CPUParticles2D_EmissionShape>` **EMISSION_SHAPE_RECTANGLE** = ``3``

Particles will be emitted in the area of a rectangle.

.. _class_CPUParticles2D_constant_EMISSION_SHAPE_POINTS:

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

:ref:`EmissionShape<enum_CPUParticles2D_EmissionShape>` **EMISSION_SHAPE_POINTS** = ``4``

Particles will be emitted at a position chosen randomly among :ref:`emission_points<class_CPUParticles2D_property_emission_points>`. Particle color will be modulated by :ref:`emission_colors<class_CPUParticles2D_property_emission_colors>`.

.. _class_CPUParticles2D_constant_EMISSION_SHAPE_DIRECTED_POINTS:

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

:ref:`EmissionShape<enum_CPUParticles2D_EmissionShape>` **EMISSION_SHAPE_DIRECTED_POINTS** = ``5``

Particles will be emitted at a position chosen randomly among :ref:`emission_points<class_CPUParticles2D_property_emission_points>`. Particle velocity and rotation will be set based on :ref:`emission_normals<class_CPUParticles2D_property_emission_normals>`. Particle color will be modulated by :ref:`emission_colors<class_CPUParticles2D_property_emission_colors>`.

.. _class_CPUParticles2D_constant_EMISSION_SHAPE_MAX:

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

:ref:`EmissionShape<enum_CPUParticles2D_EmissionShape>` **EMISSION_SHAPE_MAX** = ``6``

Represents the size of the :ref:`EmissionShape<enum_CPUParticles2D_EmissionShape>` enum.

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

----

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

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

.. _class_CPUParticles2D_property_amount:

.. rst-class:: classref-property

:ref:`int<class_int>` **amount** = ``8`` :ref:`🔗<class_CPUParticles2D_property_amount>`

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

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

Number of particles emitted in one emission cycle.

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

----

.. _class_CPUParticles2D_property_angle_curve:

.. rst-class:: classref-property

:ref:`Curve<class_Curve>` **angle_curve** :ref:`🔗<class_CPUParticles2D_property_angle_curve>`

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

- |void| **set_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, curve\: :ref:`Curve<class_Curve>`\ )
- :ref:`Curve<class_Curve>` **get_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Each particle's rotation will be animated along this :ref:`Curve<class_Curve>`. Should be a unit :ref:`Curve<class_Curve>`.

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

----

.. _class_CPUParticles2D_property_angle_max:

.. rst-class:: classref-property

:ref:`float<class_float>` **angle_max** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_angle_max>`

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

- |void| **set_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Maximum initial rotation applied to each particle, in degrees.

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

----

.. _class_CPUParticles2D_property_angle_min:

.. rst-class:: classref-property

:ref:`float<class_float>` **angle_min** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_angle_min>`

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

- |void| **set_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Minimum equivalent of :ref:`angle_max<class_CPUParticles2D_property_angle_max>`.

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

----

.. _class_CPUParticles2D_property_angular_velocity_curve:

.. rst-class:: classref-property

:ref:`Curve<class_Curve>` **angular_velocity_curve** :ref:`🔗<class_CPUParticles2D_property_angular_velocity_curve>`

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

- |void| **set_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, curve\: :ref:`Curve<class_Curve>`\ )
- :ref:`Curve<class_Curve>` **get_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Each particle's angular velocity will vary along this :ref:`Curve<class_Curve>`. Should be a unit :ref:`Curve<class_Curve>`.

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

----

.. _class_CPUParticles2D_property_angular_velocity_max:

.. rst-class:: classref-property

:ref:`float<class_float>` **angular_velocity_max** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_angular_velocity_max>`

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

- |void| **set_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Maximum initial angular velocity (rotation speed) applied to each particle in *degrees* per second.

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

----

.. _class_CPUParticles2D_property_angular_velocity_min:

.. rst-class:: classref-property

:ref:`float<class_float>` **angular_velocity_min** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_angular_velocity_min>`

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

- |void| **set_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Minimum equivalent of :ref:`angular_velocity_max<class_CPUParticles2D_property_angular_velocity_max>`.

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

----

.. _class_CPUParticles2D_property_anim_offset_curve:

.. rst-class:: classref-property

:ref:`Curve<class_Curve>` **anim_offset_curve** :ref:`🔗<class_CPUParticles2D_property_anim_offset_curve>`

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

- |void| **set_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, curve\: :ref:`Curve<class_Curve>`\ )
- :ref:`Curve<class_Curve>` **get_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Each particle's animation offset will vary along this :ref:`Curve<class_Curve>`. Should be a unit :ref:`Curve<class_Curve>`.

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

----

.. _class_CPUParticles2D_property_anim_offset_max:

.. rst-class:: classref-property

:ref:`float<class_float>` **anim_offset_max** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_anim_offset_max>`

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

- |void| **set_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Maximum animation offset that corresponds to frame index in the texture. ``0`` is the first frame, ``1`` is the last one. See :ref:`CanvasItemMaterial.particles_animation<class_CanvasItemMaterial_property_particles_animation>`.

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

----

.. _class_CPUParticles2D_property_anim_offset_min:

.. rst-class:: classref-property

:ref:`float<class_float>` **anim_offset_min** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_anim_offset_min>`

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

- |void| **set_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Minimum equivalent of :ref:`anim_offset_max<class_CPUParticles2D_property_anim_offset_max>`.

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

----

.. _class_CPUParticles2D_property_anim_speed_curve:

.. rst-class:: classref-property

:ref:`Curve<class_Curve>` **anim_speed_curve** :ref:`🔗<class_CPUParticles2D_property_anim_speed_curve>`

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

- |void| **set_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, curve\: :ref:`Curve<class_Curve>`\ )
- :ref:`Curve<class_Curve>` **get_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Each particle's animation speed will vary along this :ref:`Curve<class_Curve>`. Should be a unit :ref:`Curve<class_Curve>`.

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

----

.. _class_CPUParticles2D_property_anim_speed_max:

.. rst-class:: classref-property

:ref:`float<class_float>` **anim_speed_max** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_anim_speed_max>`

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

- |void| **set_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Maximum particle animation speed. Animation speed of ``1`` means that the particles will make full ``0`` to ``1`` offset cycle during lifetime, ``2`` means ``2`` cycles etc.

With animation speed greater than ``1``, remember to enable :ref:`CanvasItemMaterial.particles_anim_loop<class_CanvasItemMaterial_property_particles_anim_loop>` property if you want the animation to repeat.

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

----

.. _class_CPUParticles2D_property_anim_speed_min:

.. rst-class:: classref-property

:ref:`float<class_float>` **anim_speed_min** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_anim_speed_min>`

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

- |void| **set_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Minimum equivalent of :ref:`anim_speed_max<class_CPUParticles2D_property_anim_speed_max>`.

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

----

.. _class_CPUParticles2D_property_color:

.. rst-class:: classref-property

:ref:`Color<class_Color>` **color** = ``Color(1, 1, 1, 1)`` :ref:`🔗<class_CPUParticles2D_property_color>`

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

- |void| **set_color**\ (\ value\: :ref:`Color<class_Color>`\ )
- :ref:`Color<class_Color>` **get_color**\ (\ )

Each particle's initial color. If :ref:`texture<class_CPUParticles2D_property_texture>` is defined, it will be multiplied by this color.

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

----

.. _class_CPUParticles2D_property_color_initial_ramp:

.. rst-class:: classref-property

:ref:`Gradient<class_Gradient>` **color_initial_ramp** :ref:`🔗<class_CPUParticles2D_property_color_initial_ramp>`

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

- |void| **set_color_initial_ramp**\ (\ value\: :ref:`Gradient<class_Gradient>`\ )
- :ref:`Gradient<class_Gradient>` **get_color_initial_ramp**\ (\ )

Each particle's initial color will vary along this :ref:`GradientTexture1D<class_GradientTexture1D>` (multiplied with :ref:`color<class_CPUParticles2D_property_color>`).

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

----

.. _class_CPUParticles2D_property_color_ramp:

.. rst-class:: classref-property

:ref:`Gradient<class_Gradient>` **color_ramp** :ref:`🔗<class_CPUParticles2D_property_color_ramp>`

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

- |void| **set_color_ramp**\ (\ value\: :ref:`Gradient<class_Gradient>`\ )
- :ref:`Gradient<class_Gradient>` **get_color_ramp**\ (\ )

Each particle's color will vary along this :ref:`Gradient<class_Gradient>` (multiplied with :ref:`color<class_CPUParticles2D_property_color>`).

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

----

.. _class_CPUParticles2D_property_damping_curve:

.. rst-class:: classref-property

:ref:`Curve<class_Curve>` **damping_curve** :ref:`🔗<class_CPUParticles2D_property_damping_curve>`

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

- |void| **set_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, curve\: :ref:`Curve<class_Curve>`\ )
- :ref:`Curve<class_Curve>` **get_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Damping will vary along this :ref:`Curve<class_Curve>`. Should be a unit :ref:`Curve<class_Curve>`.

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

----

.. _class_CPUParticles2D_property_damping_max:

.. rst-class:: classref-property

:ref:`float<class_float>` **damping_max** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_damping_max>`

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

- |void| **set_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

The maximum rate at which particles lose velocity. For example value of ``100`` means that the particle will go from ``100`` velocity to ``0`` in ``1`` second.

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

----

.. _class_CPUParticles2D_property_damping_min:

.. rst-class:: classref-property

:ref:`float<class_float>` **damping_min** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_damping_min>`

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

- |void| **set_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Minimum equivalent of :ref:`damping_max<class_CPUParticles2D_property_damping_max>`.

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

----

.. _class_CPUParticles2D_property_direction:

.. rst-class:: classref-property

:ref:`Vector2<class_Vector2>` **direction** = ``Vector2(1, 0)`` :ref:`🔗<class_CPUParticles2D_property_direction>`

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

- |void| **set_direction**\ (\ value\: :ref:`Vector2<class_Vector2>`\ )
- :ref:`Vector2<class_Vector2>` **get_direction**\ (\ )

Unit vector specifying the particles' emission direction.

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

----

.. _class_CPUParticles2D_property_draw_order:

.. rst-class:: classref-property

:ref:`DrawOrder<enum_CPUParticles2D_DrawOrder>` **draw_order** = ``0`` :ref:`🔗<class_CPUParticles2D_property_draw_order>`

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

- |void| **set_draw_order**\ (\ value\: :ref:`DrawOrder<enum_CPUParticles2D_DrawOrder>`\ )
- :ref:`DrawOrder<enum_CPUParticles2D_DrawOrder>` **get_draw_order**\ (\ )

Particle draw order. Uses :ref:`DrawOrder<enum_CPUParticles2D_DrawOrder>` values.

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

----

.. _class_CPUParticles2D_property_emission_colors:

.. rst-class:: classref-property

:ref:`PackedColorArray<class_PackedColorArray>` **emission_colors** :ref:`🔗<class_CPUParticles2D_property_emission_colors>`

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

- |void| **set_emission_colors**\ (\ value\: :ref:`PackedColorArray<class_PackedColorArray>`\ )
- :ref:`PackedColorArray<class_PackedColorArray>` **get_emission_colors**\ (\ )

Sets the :ref:`Color<class_Color>`\ s to modulate particles by when using :ref:`EMISSION_SHAPE_POINTS<class_CPUParticles2D_constant_EMISSION_SHAPE_POINTS>` or :ref:`EMISSION_SHAPE_DIRECTED_POINTS<class_CPUParticles2D_constant_EMISSION_SHAPE_DIRECTED_POINTS>`.

**Note:** The returned array is *copied* and any changes to it will not update the original property value. See :ref:`PackedColorArray<class_PackedColorArray>` for more details.

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

----

.. _class_CPUParticles2D_property_emission_normals:

.. rst-class:: classref-property

:ref:`PackedVector2Array<class_PackedVector2Array>` **emission_normals** :ref:`🔗<class_CPUParticles2D_property_emission_normals>`

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

- |void| **set_emission_normals**\ (\ value\: :ref:`PackedVector2Array<class_PackedVector2Array>`\ )
- :ref:`PackedVector2Array<class_PackedVector2Array>` **get_emission_normals**\ (\ )

Sets the direction the particles will be emitted in when using :ref:`EMISSION_SHAPE_DIRECTED_POINTS<class_CPUParticles2D_constant_EMISSION_SHAPE_DIRECTED_POINTS>`.

**Note:** The returned array is *copied* and any changes to it will not update the original property value. See :ref:`PackedVector2Array<class_PackedVector2Array>` for more details.

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

----

.. _class_CPUParticles2D_property_emission_points:

.. rst-class:: classref-property

:ref:`PackedVector2Array<class_PackedVector2Array>` **emission_points** :ref:`🔗<class_CPUParticles2D_property_emission_points>`

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

- |void| **set_emission_points**\ (\ value\: :ref:`PackedVector2Array<class_PackedVector2Array>`\ )
- :ref:`PackedVector2Array<class_PackedVector2Array>` **get_emission_points**\ (\ )

Sets the initial positions to spawn particles when using :ref:`EMISSION_SHAPE_POINTS<class_CPUParticles2D_constant_EMISSION_SHAPE_POINTS>` or :ref:`EMISSION_SHAPE_DIRECTED_POINTS<class_CPUParticles2D_constant_EMISSION_SHAPE_DIRECTED_POINTS>`.

**Note:** The returned array is *copied* and any changes to it will not update the original property value. See :ref:`PackedVector2Array<class_PackedVector2Array>` for more details.

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

----

.. _class_CPUParticles2D_property_emission_rect_extents:

.. rst-class:: classref-property

:ref:`Vector2<class_Vector2>` **emission_rect_extents** :ref:`🔗<class_CPUParticles2D_property_emission_rect_extents>`

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

- |void| **set_emission_rect_extents**\ (\ value\: :ref:`Vector2<class_Vector2>`\ )
- :ref:`Vector2<class_Vector2>` **get_emission_rect_extents**\ (\ )

The rectangle's extents if :ref:`emission_shape<class_CPUParticles2D_property_emission_shape>` is set to :ref:`EMISSION_SHAPE_RECTANGLE<class_CPUParticles2D_constant_EMISSION_SHAPE_RECTANGLE>`.

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

----

.. _class_CPUParticles2D_property_emission_shape:

.. rst-class:: classref-property

:ref:`EmissionShape<enum_CPUParticles2D_EmissionShape>` **emission_shape** = ``0`` :ref:`🔗<class_CPUParticles2D_property_emission_shape>`

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

- |void| **set_emission_shape**\ (\ value\: :ref:`EmissionShape<enum_CPUParticles2D_EmissionShape>`\ )
- :ref:`EmissionShape<enum_CPUParticles2D_EmissionShape>` **get_emission_shape**\ (\ )

Particles will be emitted inside this region. See :ref:`EmissionShape<enum_CPUParticles2D_EmissionShape>` for possible values.

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

----

.. _class_CPUParticles2D_property_emission_sphere_radius:

.. rst-class:: classref-property

:ref:`float<class_float>` **emission_sphere_radius** :ref:`🔗<class_CPUParticles2D_property_emission_sphere_radius>`

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

- |void| **set_emission_sphere_radius**\ (\ value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_emission_sphere_radius**\ (\ )

The sphere's radius if :ref:`emission_shape<class_CPUParticles2D_property_emission_shape>` is set to :ref:`EMISSION_SHAPE_SPHERE<class_CPUParticles2D_constant_EMISSION_SHAPE_SPHERE>`.

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

----

.. _class_CPUParticles2D_property_emitting:

.. rst-class:: classref-property

:ref:`bool<class_bool>` **emitting** = ``true`` :ref:`🔗<class_CPUParticles2D_property_emitting>`

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

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

If ``true``, particles are being emitted. :ref:`emitting<class_CPUParticles2D_property_emitting>` can be used to start and stop particles from emitting. However, if :ref:`one_shot<class_CPUParticles2D_property_one_shot>` is ``true`` setting :ref:`emitting<class_CPUParticles2D_property_emitting>` to ``true`` will not restart the emission cycle until after all active particles finish processing. You can use the :ref:`finished<class_CPUParticles2D_signal_finished>` signal to be notified once all active particles finish processing.

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

----

.. _class_CPUParticles2D_property_explosiveness:

.. rst-class:: classref-property

:ref:`float<class_float>` **explosiveness** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_explosiveness>`

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

- |void| **set_explosiveness_ratio**\ (\ value\: :ref:`float<class_float>`\ )
- :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_CPUParticles2D_property_fixed_fps:

.. rst-class:: classref-property

:ref:`int<class_int>` **fixed_fps** = ``0`` :ref:`🔗<class_CPUParticles2D_property_fixed_fps>`

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

- |void| **set_fixed_fps**\ (\ value\: :ref:`int<class_int>`\ )
- :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_CPUParticles2D_property_fract_delta:

.. rst-class:: classref-property

:ref:`bool<class_bool>` **fract_delta** = ``true`` :ref:`🔗<class_CPUParticles2D_property_fract_delta>`

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

- |void| **set_fractional_delta**\ (\ value\: :ref:`bool<class_bool>`\ )
- :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_CPUParticles2D_property_gravity:

.. rst-class:: classref-property

:ref:`Vector2<class_Vector2>` **gravity** = ``Vector2(0, 980)`` :ref:`🔗<class_CPUParticles2D_property_gravity>`

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

- |void| **set_gravity**\ (\ value\: :ref:`Vector2<class_Vector2>`\ )
- :ref:`Vector2<class_Vector2>` **get_gravity**\ (\ )

Gravity applied to every particle.

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

----

.. _class_CPUParticles2D_property_hue_variation_curve:

.. rst-class:: classref-property

:ref:`Curve<class_Curve>` **hue_variation_curve** :ref:`🔗<class_CPUParticles2D_property_hue_variation_curve>`

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

- |void| **set_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, curve\: :ref:`Curve<class_Curve>`\ )
- :ref:`Curve<class_Curve>` **get_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Each particle's hue will vary along this :ref:`Curve<class_Curve>`. Should be a unit :ref:`Curve<class_Curve>`.

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

----

.. _class_CPUParticles2D_property_hue_variation_max:

.. rst-class:: classref-property

:ref:`float<class_float>` **hue_variation_max** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_hue_variation_max>`

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

- |void| **set_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Maximum initial hue variation applied to each particle. It will shift the particle color's hue.

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

----

.. _class_CPUParticles2D_property_hue_variation_min:

.. rst-class:: classref-property

:ref:`float<class_float>` **hue_variation_min** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_hue_variation_min>`

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

- |void| **set_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Minimum equivalent of :ref:`hue_variation_max<class_CPUParticles2D_property_hue_variation_max>`.

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

----

.. _class_CPUParticles2D_property_initial_velocity_max:

.. rst-class:: classref-property

:ref:`float<class_float>` **initial_velocity_max** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_initial_velocity_max>`

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

- |void| **set_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Maximum initial velocity magnitude for each particle. Direction comes from :ref:`direction<class_CPUParticles2D_property_direction>` and :ref:`spread<class_CPUParticles2D_property_spread>`.

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

----

.. _class_CPUParticles2D_property_initial_velocity_min:

.. rst-class:: classref-property

:ref:`float<class_float>` **initial_velocity_min** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_initial_velocity_min>`

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

- |void| **set_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Minimum equivalent of :ref:`initial_velocity_max<class_CPUParticles2D_property_initial_velocity_max>`.

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

----

.. _class_CPUParticles2D_property_lifetime:

.. rst-class:: classref-property

:ref:`float<class_float>` **lifetime** = ``1.0`` :ref:`🔗<class_CPUParticles2D_property_lifetime>`

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

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

Amount of time each particle will exist.

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

----

.. _class_CPUParticles2D_property_lifetime_randomness:

.. rst-class:: classref-property

:ref:`float<class_float>` **lifetime_randomness** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_lifetime_randomness>`

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

- |void| **set_lifetime_randomness**\ (\ value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_lifetime_randomness**\ (\ )

Particle lifetime randomness ratio.

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

----

.. _class_CPUParticles2D_property_linear_accel_curve:

.. rst-class:: classref-property

:ref:`Curve<class_Curve>` **linear_accel_curve** :ref:`🔗<class_CPUParticles2D_property_linear_accel_curve>`

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

- |void| **set_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, curve\: :ref:`Curve<class_Curve>`\ )
- :ref:`Curve<class_Curve>` **get_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Each particle's linear acceleration will vary along this :ref:`Curve<class_Curve>`. Should be a unit :ref:`Curve<class_Curve>`.

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

----

.. _class_CPUParticles2D_property_linear_accel_max:

.. rst-class:: classref-property

:ref:`float<class_float>` **linear_accel_max** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_linear_accel_max>`

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

- |void| **set_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Maximum linear acceleration applied to each particle in the direction of motion.

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

----

.. _class_CPUParticles2D_property_linear_accel_min:

.. rst-class:: classref-property

:ref:`float<class_float>` **linear_accel_min** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_linear_accel_min>`

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

- |void| **set_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Minimum equivalent of :ref:`linear_accel_max<class_CPUParticles2D_property_linear_accel_max>`.

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

----

.. _class_CPUParticles2D_property_local_coords:

.. rst-class:: classref-property

:ref:`bool<class_bool>` **local_coords** = ``false`` :ref:`🔗<class_CPUParticles2D_property_local_coords>`

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

- |void| **set_use_local_coordinates**\ (\ value\: :ref:`bool<class_bool>`\ )
- :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 **CPUParticles2D** node (and its parents) when it is moved or rotated. If ``false``, particles use global coordinates; they will not move or rotate along the **CPUParticles2D** node (and its parents) when it is moved or rotated.

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

----

.. _class_CPUParticles2D_property_one_shot:

.. rst-class:: classref-property

:ref:`bool<class_bool>` **one_shot** = ``false`` :ref:`🔗<class_CPUParticles2D_property_one_shot>`

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

- |void| **set_one_shot**\ (\ value\: :ref:`bool<class_bool>`\ )
- :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_CPUParticles2D_property_orbit_velocity_curve:

.. rst-class:: classref-property

:ref:`Curve<class_Curve>` **orbit_velocity_curve** :ref:`🔗<class_CPUParticles2D_property_orbit_velocity_curve>`

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

- |void| **set_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, curve\: :ref:`Curve<class_Curve>`\ )
- :ref:`Curve<class_Curve>` **get_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Each particle's orbital velocity will vary along this :ref:`Curve<class_Curve>`. Should be a unit :ref:`Curve<class_Curve>`.

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

----

.. _class_CPUParticles2D_property_orbit_velocity_max:

.. rst-class:: classref-property

:ref:`float<class_float>` **orbit_velocity_max** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_orbit_velocity_max>`

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

- |void| **set_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Maximum orbital velocity applied to each particle. Makes the particles circle around origin. Specified in number of full rotations around origin per second.

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

----

.. _class_CPUParticles2D_property_orbit_velocity_min:

.. rst-class:: classref-property

:ref:`float<class_float>` **orbit_velocity_min** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_orbit_velocity_min>`

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

- |void| **set_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Minimum equivalent of :ref:`orbit_velocity_max<class_CPUParticles2D_property_orbit_velocity_max>`.

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

----

.. _class_CPUParticles2D_property_particle_flag_align_y:

.. rst-class:: classref-property

:ref:`bool<class_bool>` **particle_flag_align_y** = ``false`` :ref:`🔗<class_CPUParticles2D_property_particle_flag_align_y>`

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

- |void| **set_particle_flag**\ (\ particle_flag\: :ref:`ParticleFlags<enum_CPUParticles2D_ParticleFlags>`, enable\: :ref:`bool<class_bool>`\ )
- :ref:`bool<class_bool>` **get_particle_flag**\ (\ particle_flag\: :ref:`ParticleFlags<enum_CPUParticles2D_ParticleFlags>`\ ) |const|

Align Y axis of particle with the direction of its velocity.

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

----

.. _class_CPUParticles2D_property_preprocess:

.. rst-class:: classref-property

:ref:`float<class_float>` **preprocess** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_preprocess>`

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

- |void| **set_pre_process_time**\ (\ value\: :ref:`float<class_float>`\ )
- :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_CPUParticles2D_property_radial_accel_curve:

.. rst-class:: classref-property

:ref:`Curve<class_Curve>` **radial_accel_curve** :ref:`🔗<class_CPUParticles2D_property_radial_accel_curve>`

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

- |void| **set_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, curve\: :ref:`Curve<class_Curve>`\ )
- :ref:`Curve<class_Curve>` **get_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Each particle's radial acceleration will vary along this :ref:`Curve<class_Curve>`. Should be a unit :ref:`Curve<class_Curve>`.

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

----

.. _class_CPUParticles2D_property_radial_accel_max:

.. rst-class:: classref-property

:ref:`float<class_float>` **radial_accel_max** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_radial_accel_max>`

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

- |void| **set_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Maximum radial acceleration applied to each particle. Makes particle accelerate away from the origin or towards it if negative.

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

----

.. _class_CPUParticles2D_property_radial_accel_min:

.. rst-class:: classref-property

:ref:`float<class_float>` **radial_accel_min** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_radial_accel_min>`

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

- |void| **set_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Minimum equivalent of :ref:`radial_accel_max<class_CPUParticles2D_property_radial_accel_max>`.

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

----

.. _class_CPUParticles2D_property_randomness:

.. rst-class:: classref-property

:ref:`float<class_float>` **randomness** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_randomness>`

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

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

Emission lifetime randomness ratio.

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

----

.. _class_CPUParticles2D_property_scale_amount_curve:

.. rst-class:: classref-property

:ref:`Curve<class_Curve>` **scale_amount_curve** :ref:`🔗<class_CPUParticles2D_property_scale_amount_curve>`

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

- |void| **set_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, curve\: :ref:`Curve<class_Curve>`\ )
- :ref:`Curve<class_Curve>` **get_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Each particle's scale will vary along this :ref:`Curve<class_Curve>`. Should be a unit :ref:`Curve<class_Curve>`.

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

----

.. _class_CPUParticles2D_property_scale_amount_max:

.. rst-class:: classref-property

:ref:`float<class_float>` **scale_amount_max** = ``1.0`` :ref:`🔗<class_CPUParticles2D_property_scale_amount_max>`

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

- |void| **set_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Maximum initial scale applied to each particle.

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

----

.. _class_CPUParticles2D_property_scale_amount_min:

.. rst-class:: classref-property

:ref:`float<class_float>` **scale_amount_min** = ``1.0`` :ref:`🔗<class_CPUParticles2D_property_scale_amount_min>`

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

- |void| **set_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Minimum equivalent of :ref:`scale_amount_max<class_CPUParticles2D_property_scale_amount_max>`.

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

----

.. _class_CPUParticles2D_property_scale_curve_x:

.. rst-class:: classref-property

:ref:`Curve<class_Curve>` **scale_curve_x** :ref:`🔗<class_CPUParticles2D_property_scale_curve_x>`

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

- |void| **set_scale_curve_x**\ (\ value\: :ref:`Curve<class_Curve>`\ )
- :ref:`Curve<class_Curve>` **get_scale_curve_x**\ (\ )

Each particle's horizontal scale will vary along this :ref:`Curve<class_Curve>`. Should be a unit :ref:`Curve<class_Curve>`.

\ :ref:`split_scale<class_CPUParticles2D_property_split_scale>` must be enabled.

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

----

.. _class_CPUParticles2D_property_scale_curve_y:

.. rst-class:: classref-property

:ref:`Curve<class_Curve>` **scale_curve_y** :ref:`🔗<class_CPUParticles2D_property_scale_curve_y>`

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

- |void| **set_scale_curve_y**\ (\ value\: :ref:`Curve<class_Curve>`\ )
- :ref:`Curve<class_Curve>` **get_scale_curve_y**\ (\ )

Each particle's vertical scale will vary along this :ref:`Curve<class_Curve>`. Should be a unit :ref:`Curve<class_Curve>`.

\ :ref:`split_scale<class_CPUParticles2D_property_split_scale>` must be enabled.

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

----

.. _class_CPUParticles2D_property_seed:

.. rst-class:: classref-property

:ref:`int<class_int>` **seed** = ``0`` :ref:`🔗<class_CPUParticles2D_property_seed>`

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

- |void| **set_seed**\ (\ value\: :ref:`int<class_int>`\ )
- :ref:`int<class_int>` **get_seed**\ (\ )

Sets the random seed used by the particle system. Only effective if :ref:`use_fixed_seed<class_CPUParticles2D_property_use_fixed_seed>` is ``true``.

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

----

.. _class_CPUParticles2D_property_speed_scale:

.. rst-class:: classref-property

:ref:`float<class_float>` **speed_scale** = ``1.0`` :ref:`🔗<class_CPUParticles2D_property_speed_scale>`

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

- |void| **set_speed_scale**\ (\ value\: :ref:`float<class_float>`\ )
- :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_CPUParticles2D_property_split_scale:

.. rst-class:: classref-property

:ref:`bool<class_bool>` **split_scale** = ``false`` :ref:`🔗<class_CPUParticles2D_property_split_scale>`

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

- |void| **set_split_scale**\ (\ value\: :ref:`bool<class_bool>`\ )
- :ref:`bool<class_bool>` **get_split_scale**\ (\ )

If ``true``, the scale curve will be split into x and y components. See :ref:`scale_curve_x<class_CPUParticles2D_property_scale_curve_x>` and :ref:`scale_curve_y<class_CPUParticles2D_property_scale_curve_y>`.

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

----

.. _class_CPUParticles2D_property_spread:

.. rst-class:: classref-property

:ref:`float<class_float>` **spread** = ``45.0`` :ref:`🔗<class_CPUParticles2D_property_spread>`

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

- |void| **set_spread**\ (\ value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_spread**\ (\ )

Each particle's initial direction range from ``+spread`` to ``-spread`` degrees.

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

----

.. _class_CPUParticles2D_property_tangential_accel_curve:

.. rst-class:: classref-property

:ref:`Curve<class_Curve>` **tangential_accel_curve** :ref:`🔗<class_CPUParticles2D_property_tangential_accel_curve>`

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

- |void| **set_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, curve\: :ref:`Curve<class_Curve>`\ )
- :ref:`Curve<class_Curve>` **get_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Each particle's tangential acceleration will vary along this :ref:`Curve<class_Curve>`. Should be a unit :ref:`Curve<class_Curve>`.

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

----

.. _class_CPUParticles2D_property_tangential_accel_max:

.. rst-class:: classref-property

:ref:`float<class_float>` **tangential_accel_max** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_tangential_accel_max>`

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

- |void| **set_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Maximum tangential acceleration applied to each particle. Tangential acceleration is perpendicular to the particle's velocity giving the particles a swirling motion.

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

----

.. _class_CPUParticles2D_property_tangential_accel_min:

.. rst-class:: classref-property

:ref:`float<class_float>` **tangential_accel_min** = ``0.0`` :ref:`🔗<class_CPUParticles2D_property_tangential_accel_min>`

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

- |void| **set_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const|

Minimum equivalent of :ref:`tangential_accel_max<class_CPUParticles2D_property_tangential_accel_max>`.

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

----

.. _class_CPUParticles2D_property_texture:

.. rst-class:: classref-property

:ref:`Texture2D<class_Texture2D>` **texture** :ref:`🔗<class_CPUParticles2D_property_texture>`

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

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

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

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

----

.. _class_CPUParticles2D_property_use_fixed_seed:

.. rst-class:: classref-property

:ref:`bool<class_bool>` **use_fixed_seed** = ``false`` :ref:`🔗<class_CPUParticles2D_property_use_fixed_seed>`

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

- |void| **set_use_fixed_seed**\ (\ value\: :ref:`bool<class_bool>`\ )
- :ref:`bool<class_bool>` **get_use_fixed_seed**\ (\ )

If ``true``, particles will use the same seed for every simulation using the seed defined in :ref:`seed<class_CPUParticles2D_property_seed>`. This is useful for situations where the visual outcome should be consistent across replays, for example when using Movie Maker mode.

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

----

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

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

.. _class_CPUParticles2D_method_convert_from_particles:

.. rst-class:: classref-method

|void| **convert_from_particles**\ (\ particles\: :ref:`Node<class_Node>`\ ) :ref:`🔗<class_CPUParticles2D_method_convert_from_particles>`

Sets this node's properties to match a given :ref:`GPUParticles2D<class_GPUParticles2D>` node with an assigned :ref:`ParticleProcessMaterial<class_ParticleProcessMaterial>`.

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

----

.. _class_CPUParticles2D_method_get_param_curve:

.. rst-class:: classref-method

:ref:`Curve<class_Curve>` **get_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const| :ref:`🔗<class_CPUParticles2D_method_get_param_curve>`

Returns the :ref:`Curve<class_Curve>` of the parameter specified by :ref:`Parameter<enum_CPUParticles2D_Parameter>`.

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

----

.. _class_CPUParticles2D_method_get_param_max:

.. rst-class:: classref-method

:ref:`float<class_float>` **get_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const| :ref:`🔗<class_CPUParticles2D_method_get_param_max>`

Returns the maximum value range for the given parameter.

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.. _class_CPUParticles2D_method_get_param_min:

.. rst-class:: classref-method

:ref:`float<class_float>` **get_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`\ ) |const| :ref:`🔗<class_CPUParticles2D_method_get_param_min>`

Returns the minimum value range for the given parameter.

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.. _class_CPUParticles2D_method_get_particle_flag:

.. rst-class:: classref-method

:ref:`bool<class_bool>` **get_particle_flag**\ (\ particle_flag\: :ref:`ParticleFlags<enum_CPUParticles2D_ParticleFlags>`\ ) |const| :ref:`🔗<class_CPUParticles2D_method_get_particle_flag>`

Returns the enabled state of the given particle flag (see :ref:`ParticleFlags<enum_CPUParticles2D_ParticleFlags>` for options).

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.. _class_CPUParticles2D_method_request_particles_process:

.. rst-class:: classref-method

|void| **request_particles_process**\ (\ process_time\: :ref:`float<class_float>`\ ) :ref:`🔗<class_CPUParticles2D_method_request_particles_process>`

Requests the particles to process for extra process time during a single frame.

Useful for particle playback, if used in combination with :ref:`use_fixed_seed<class_CPUParticles2D_property_use_fixed_seed>` or by calling :ref:`restart<class_CPUParticles2D_method_restart>` with parameter ``keep_seed`` set to ``true``.

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.. _class_CPUParticles2D_method_restart:

.. rst-class:: classref-method

|void| **restart**\ (\ keep_seed\: :ref:`bool<class_bool>` = false\ ) :ref:`🔗<class_CPUParticles2D_method_restart>`

Restarts the particle emitter.

If ``keep_seed`` is ``true``, the current random seed will be preserved. Useful for seeking and playback.

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.. _class_CPUParticles2D_method_set_param_curve:

.. rst-class:: classref-method

|void| **set_param_curve**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, curve\: :ref:`Curve<class_Curve>`\ ) :ref:`🔗<class_CPUParticles2D_method_set_param_curve>`

Sets the :ref:`Curve<class_Curve>` of the parameter specified by :ref:`Parameter<enum_CPUParticles2D_Parameter>`. Should be a unit :ref:`Curve<class_Curve>`.

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.. _class_CPUParticles2D_method_set_param_max:

.. rst-class:: classref-method

|void| **set_param_max**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ ) :ref:`🔗<class_CPUParticles2D_method_set_param_max>`

Sets the maximum value for the given parameter.

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.. _class_CPUParticles2D_method_set_param_min:

.. rst-class:: classref-method

|void| **set_param_min**\ (\ param\: :ref:`Parameter<enum_CPUParticles2D_Parameter>`, value\: :ref:`float<class_float>`\ ) :ref:`🔗<class_CPUParticles2D_method_set_param_min>`

Sets the minimum value for the given parameter.

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.. _class_CPUParticles2D_method_set_particle_flag:

.. rst-class:: classref-method

|void| **set_particle_flag**\ (\ particle_flag\: :ref:`ParticleFlags<enum_CPUParticles2D_ParticleFlags>`, enable\: :ref:`bool<class_bool>`\ ) :ref:`🔗<class_CPUParticles2D_method_set_particle_flag>`

Enables or disables the given flag (see :ref:`ParticleFlags<enum_CPUParticles2D_ParticleFlags>` for options).

.. |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.)`