godot-docs/classes/class_particlesmaterial.rst

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.. _class_ParticlesMaterial:

ParticlesMaterial
=================

**Inherits:** :ref:`Material<class_Material>` **<** :ref:`Resource<class_Resource>` **<** :ref:`RefCounted<class_RefCounted>` **<** :ref:`Object<class_Object>`

Particle properties for :ref:`GPUParticles3D<class_GPUParticles3D>` and :ref:`GPUParticles2D<class_GPUParticles2D>` nodes.

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

ParticlesMaterial defines particle properties and behavior. It is used in the ``process_material`` of :ref:`GPUParticles3D<class_GPUParticles3D>` and :ref:`GPUParticles2D<class_GPUParticles2D>` emitter nodes.

Some of this material's properties are applied to each particle when emitted, while others can have a :ref:`CurveTexture<class_CurveTexture>` applied to vary values over the lifetime of the particle.

When a randomness ratio is applied to a property it is used to scale that property by a random amount. The random ratio is used to interpolate between ``1.0`` and a random number less than one, the result is multiplied by the property to obtain the randomized property. For example a random ratio of ``0.4`` would scale the original property between ``0.4-1.0`` of its original value.

Properties
----------

+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Texture2D<class_Texture2D>`                            | :ref:`angle_curve<class_ParticlesMaterial_property_angle_curve>`                                     |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`angle_max<class_ParticlesMaterial_property_angle_max>`                                         | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`angle_min<class_ParticlesMaterial_property_angle_min>`                                         | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Texture2D<class_Texture2D>`                            | :ref:`angular_velocity_curve<class_ParticlesMaterial_property_angular_velocity_curve>`               |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`angular_velocity_max<class_ParticlesMaterial_property_angular_velocity_max>`                   | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`angular_velocity_min<class_ParticlesMaterial_property_angular_velocity_min>`                   | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Texture2D<class_Texture2D>`                            | :ref:`anim_offset_curve<class_ParticlesMaterial_property_anim_offset_curve>`                         |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`anim_offset_max<class_ParticlesMaterial_property_anim_offset_max>`                             | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`anim_offset_min<class_ParticlesMaterial_property_anim_offset_min>`                             | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Texture2D<class_Texture2D>`                            | :ref:`anim_speed_curve<class_ParticlesMaterial_property_anim_speed_curve>`                           |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`anim_speed_max<class_ParticlesMaterial_property_anim_speed_max>`                               | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`anim_speed_min<class_ParticlesMaterial_property_anim_speed_min>`                               | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`bool<class_bool>`                                      | :ref:`attractor_interaction_enabled<class_ParticlesMaterial_property_attractor_interaction_enabled>` | ``true``                |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`collision_bounce<class_ParticlesMaterial_property_collision_bounce>`                           | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`bool<class_bool>`                                      | :ref:`collision_enabled<class_ParticlesMaterial_property_collision_enabled>`                         | ``false``               |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`collision_friction<class_ParticlesMaterial_property_collision_friction>`                       | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`bool<class_bool>`                                      | :ref:`collision_use_scale<class_ParticlesMaterial_property_collision_use_scale>`                     | ``false``               |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Color<class_Color>`                                    | :ref:`color<class_ParticlesMaterial_property_color>`                                                 | ``Color(1, 1, 1, 1)``   |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Texture2D<class_Texture2D>`                            | :ref:`color_ramp<class_ParticlesMaterial_property_color_ramp>`                                       |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Texture2D<class_Texture2D>`                            | :ref:`damping_curve<class_ParticlesMaterial_property_damping_curve>`                                 |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`damping_max<class_ParticlesMaterial_property_damping_max>`                                     | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`damping_min<class_ParticlesMaterial_property_damping_min>`                                     | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Vector3<class_Vector3>`                                | :ref:`direction<class_ParticlesMaterial_property_direction>`                                         | ``Vector3(1, 0, 0)``    |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Vector3<class_Vector3>`                                | :ref:`emission_box_extents<class_ParticlesMaterial_property_emission_box_extents>`                   |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Texture2D<class_Texture2D>`                            | :ref:`emission_color_texture<class_ParticlesMaterial_property_emission_color_texture>`               |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Texture2D<class_Texture2D>`                            | :ref:`emission_normal_texture<class_ParticlesMaterial_property_emission_normal_texture>`             |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`int<class_int>`                                        | :ref:`emission_point_count<class_ParticlesMaterial_property_emission_point_count>`                   |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Texture2D<class_Texture2D>`                            | :ref:`emission_point_texture<class_ParticlesMaterial_property_emission_point_texture>`               |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Vector3<class_Vector3>`                                | :ref:`emission_ring_axis<class_ParticlesMaterial_property_emission_ring_axis>`                       |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`emission_ring_height<class_ParticlesMaterial_property_emission_ring_height>`                   |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`emission_ring_inner_radius<class_ParticlesMaterial_property_emission_ring_inner_radius>`       |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`emission_ring_radius<class_ParticlesMaterial_property_emission_ring_radius>`                   |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`EmissionShape<enum_ParticlesMaterial_EmissionShape>`   | :ref:`emission_shape<class_ParticlesMaterial_property_emission_shape>`                               | ``0``                   |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`emission_sphere_radius<class_ParticlesMaterial_property_emission_sphere_radius>`               |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`flatness<class_ParticlesMaterial_property_flatness>`                                           | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Vector3<class_Vector3>`                                | :ref:`gravity<class_ParticlesMaterial_property_gravity>`                                             | ``Vector3(0, -9.8, 0)`` |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Texture2D<class_Texture2D>`                            | :ref:`hue_variation_curve<class_ParticlesMaterial_property_hue_variation_curve>`                     |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`hue_variation_max<class_ParticlesMaterial_property_hue_variation_max>`                         | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`hue_variation_min<class_ParticlesMaterial_property_hue_variation_min>`                         | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`initial_velocity_max<class_ParticlesMaterial_property_initial_velocity_max>`                   | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`initial_velocity_min<class_ParticlesMaterial_property_initial_velocity_min>`                   | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`lifetime_randomness<class_ParticlesMaterial_property_lifetime_randomness>`                     | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Texture2D<class_Texture2D>`                            | :ref:`linear_accel_curve<class_ParticlesMaterial_property_linear_accel_curve>`                       |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`linear_accel_max<class_ParticlesMaterial_property_linear_accel_max>`                           | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`linear_accel_min<class_ParticlesMaterial_property_linear_accel_min>`                           | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Texture2D<class_Texture2D>`                            | :ref:`orbit_velocity_curve<class_ParticlesMaterial_property_orbit_velocity_curve>`                   |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`orbit_velocity_max<class_ParticlesMaterial_property_orbit_velocity_max>`                       |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`orbit_velocity_min<class_ParticlesMaterial_property_orbit_velocity_min>`                       |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`bool<class_bool>`                                      | :ref:`particle_flag_align_y<class_ParticlesMaterial_property_particle_flag_align_y>`                 | ``false``               |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`bool<class_bool>`                                      | :ref:`particle_flag_disable_z<class_ParticlesMaterial_property_particle_flag_disable_z>`             | ``false``               |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`bool<class_bool>`                                      | :ref:`particle_flag_rotate_y<class_ParticlesMaterial_property_particle_flag_rotate_y>`               | ``false``               |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Texture2D<class_Texture2D>`                            | :ref:`radial_accel_curve<class_ParticlesMaterial_property_radial_accel_curve>`                       |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`radial_accel_max<class_ParticlesMaterial_property_radial_accel_max>`                           | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`radial_accel_min<class_ParticlesMaterial_property_radial_accel_min>`                           | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Texture2D<class_Texture2D>`                            | :ref:`scale_curve<class_ParticlesMaterial_property_scale_curve>`                                     |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`scale_max<class_ParticlesMaterial_property_scale_max>`                                         | ``1.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`scale_min<class_ParticlesMaterial_property_scale_min>`                                         | ``1.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`spread<class_ParticlesMaterial_property_spread>`                                               | ``45.0``                |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`int<class_int>`                                        | :ref:`sub_emitter_amount_at_end<class_ParticlesMaterial_property_sub_emitter_amount_at_end>`         |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`sub_emitter_frequency<class_ParticlesMaterial_property_sub_emitter_frequency>`                 |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`bool<class_bool>`                                      | :ref:`sub_emitter_keep_velocity<class_ParticlesMaterial_property_sub_emitter_keep_velocity>`         | ``false``               |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`SubEmitterMode<enum_ParticlesMaterial_SubEmitterMode>` | :ref:`sub_emitter_mode<class_ParticlesMaterial_property_sub_emitter_mode>`                           | ``0``                   |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`Texture2D<class_Texture2D>`                            | :ref:`tangential_accel_curve<class_ParticlesMaterial_property_tangential_accel_curve>`               |                         |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`tangential_accel_max<class_ParticlesMaterial_property_tangential_accel_max>`                   | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+
| :ref:`float<class_float>`                                    | :ref:`tangential_accel_min<class_ParticlesMaterial_property_tangential_accel_min>`                   | ``0.0``                 |
+--------------------------------------------------------------+------------------------------------------------------------------------------------------------------+-------------------------+

Methods
-------

+-----------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`float<class_float>`         | :ref:`get_param_max<class_ParticlesMaterial_method_get_param_max>` **(** :ref:`Parameter<enum_ParticlesMaterial_Parameter>` param **)** |const|                                                 |
+-----------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`float<class_float>`         | :ref:`get_param_min<class_ParticlesMaterial_method_get_param_min>` **(** :ref:`Parameter<enum_ParticlesMaterial_Parameter>` param **)** |const|                                                 |
+-----------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Texture2D<class_Texture2D>` | :ref:`get_param_texture<class_ParticlesMaterial_method_get_param_texture>` **(** :ref:`Parameter<enum_ParticlesMaterial_Parameter>` param **)** |const|                                         |
+-----------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`           | :ref:`get_particle_flag<class_ParticlesMaterial_method_get_particle_flag>` **(** :ref:`ParticleFlags<enum_ParticlesMaterial_ParticleFlags>` particle_flag **)** |const|                         |
+-----------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                              | :ref:`set_param_max<class_ParticlesMaterial_method_set_param_max>` **(** :ref:`Parameter<enum_ParticlesMaterial_Parameter>` param, :ref:`float<class_float>` value **)**                        |
+-----------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                              | :ref:`set_param_min<class_ParticlesMaterial_method_set_param_min>` **(** :ref:`Parameter<enum_ParticlesMaterial_Parameter>` param, :ref:`float<class_float>` value **)**                        |
+-----------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                              | :ref:`set_param_texture<class_ParticlesMaterial_method_set_param_texture>` **(** :ref:`Parameter<enum_ParticlesMaterial_Parameter>` param, :ref:`Texture2D<class_Texture2D>` texture **)**      |
+-----------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                              | :ref:`set_particle_flag<class_ParticlesMaterial_method_set_particle_flag>` **(** :ref:`ParticleFlags<enum_ParticlesMaterial_ParticleFlags>` particle_flag, :ref:`bool<class_bool>` enable **)** |
+-----------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

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

.. _enum_ParticlesMaterial_Parameter:

.. _class_ParticlesMaterial_constant_PARAM_INITIAL_LINEAR_VELOCITY:

.. _class_ParticlesMaterial_constant_PARAM_ANGULAR_VELOCITY:

.. _class_ParticlesMaterial_constant_PARAM_ORBIT_VELOCITY:

.. _class_ParticlesMaterial_constant_PARAM_LINEAR_ACCEL:

.. _class_ParticlesMaterial_constant_PARAM_RADIAL_ACCEL:

.. _class_ParticlesMaterial_constant_PARAM_TANGENTIAL_ACCEL:

.. _class_ParticlesMaterial_constant_PARAM_DAMPING:

.. _class_ParticlesMaterial_constant_PARAM_ANGLE:

.. _class_ParticlesMaterial_constant_PARAM_SCALE:

.. _class_ParticlesMaterial_constant_PARAM_HUE_VARIATION:

.. _class_ParticlesMaterial_constant_PARAM_ANIM_SPEED:

.. _class_ParticlesMaterial_constant_PARAM_ANIM_OFFSET:

.. _class_ParticlesMaterial_constant_PARAM_MAX:

enum **Parameter**:

- **PARAM_INITIAL_LINEAR_VELOCITY** = **0** --- Use with :ref:`set_param_min<class_ParticlesMaterial_method_set_param_min>`, :ref:`set_param_max<class_ParticlesMaterial_method_set_param_max>`, and :ref:`set_param_texture<class_ParticlesMaterial_method_set_param_texture>` to set initial velocity properties.

- **PARAM_ANGULAR_VELOCITY** = **1** --- Use with :ref:`set_param_min<class_ParticlesMaterial_method_set_param_min>`, :ref:`set_param_max<class_ParticlesMaterial_method_set_param_max>`, and :ref:`set_param_texture<class_ParticlesMaterial_method_set_param_texture>` to set angular velocity properties.

- **PARAM_ORBIT_VELOCITY** = **2** --- Use with :ref:`set_param_min<class_ParticlesMaterial_method_set_param_min>`, :ref:`set_param_max<class_ParticlesMaterial_method_set_param_max>`, and :ref:`set_param_texture<class_ParticlesMaterial_method_set_param_texture>` to set orbital velocity properties.

- **PARAM_LINEAR_ACCEL** = **3** --- Use with :ref:`set_param_min<class_ParticlesMaterial_method_set_param_min>`, :ref:`set_param_max<class_ParticlesMaterial_method_set_param_max>`, and :ref:`set_param_texture<class_ParticlesMaterial_method_set_param_texture>` to set linear acceleration properties.

- **PARAM_RADIAL_ACCEL** = **4** --- Use with :ref:`set_param_min<class_ParticlesMaterial_method_set_param_min>`, :ref:`set_param_max<class_ParticlesMaterial_method_set_param_max>`, and :ref:`set_param_texture<class_ParticlesMaterial_method_set_param_texture>` to set radial acceleration properties.

- **PARAM_TANGENTIAL_ACCEL** = **5** --- Use with :ref:`set_param_min<class_ParticlesMaterial_method_set_param_min>`, :ref:`set_param_max<class_ParticlesMaterial_method_set_param_max>`, and :ref:`set_param_texture<class_ParticlesMaterial_method_set_param_texture>` to set tangential acceleration properties.

- **PARAM_DAMPING** = **6** --- Use with :ref:`set_param_min<class_ParticlesMaterial_method_set_param_min>`, :ref:`set_param_max<class_ParticlesMaterial_method_set_param_max>`, and :ref:`set_param_texture<class_ParticlesMaterial_method_set_param_texture>` to set damping properties.

- **PARAM_ANGLE** = **7** --- Use with :ref:`set_param_min<class_ParticlesMaterial_method_set_param_min>`, :ref:`set_param_max<class_ParticlesMaterial_method_set_param_max>`, and :ref:`set_param_texture<class_ParticlesMaterial_method_set_param_texture>` to set angle properties.

- **PARAM_SCALE** = **8** --- Use with :ref:`set_param_min<class_ParticlesMaterial_method_set_param_min>`, :ref:`set_param_max<class_ParticlesMaterial_method_set_param_max>`, and :ref:`set_param_texture<class_ParticlesMaterial_method_set_param_texture>` to set scale properties.

- **PARAM_HUE_VARIATION** = **9** --- Use with :ref:`set_param_min<class_ParticlesMaterial_method_set_param_min>`, :ref:`set_param_max<class_ParticlesMaterial_method_set_param_max>`, and :ref:`set_param_texture<class_ParticlesMaterial_method_set_param_texture>` to set hue variation properties.

- **PARAM_ANIM_SPEED** = **10** --- Use with :ref:`set_param_min<class_ParticlesMaterial_method_set_param_min>`, :ref:`set_param_max<class_ParticlesMaterial_method_set_param_max>`, and :ref:`set_param_texture<class_ParticlesMaterial_method_set_param_texture>` to set animation speed properties.

- **PARAM_ANIM_OFFSET** = **11** --- Use with :ref:`set_param_min<class_ParticlesMaterial_method_set_param_min>`, :ref:`set_param_max<class_ParticlesMaterial_method_set_param_max>`, and :ref:`set_param_texture<class_ParticlesMaterial_method_set_param_texture>` to set animation offset properties.

- **PARAM_MAX** = **12** --- Represents the size of the :ref:`Parameter<enum_ParticlesMaterial_Parameter>` enum.

----

.. _enum_ParticlesMaterial_ParticleFlags:

.. _class_ParticlesMaterial_constant_PARTICLE_FLAG_ALIGN_Y_TO_VELOCITY:

.. _class_ParticlesMaterial_constant_PARTICLE_FLAG_ROTATE_Y:

.. _class_ParticlesMaterial_constant_PARTICLE_FLAG_DISABLE_Z:

.. _class_ParticlesMaterial_constant_PARTICLE_FLAG_MAX:

enum **ParticleFlags**:

- **PARTICLE_FLAG_ALIGN_Y_TO_VELOCITY** = **0** --- Use with :ref:`set_particle_flag<class_ParticlesMaterial_method_set_particle_flag>` to set :ref:`particle_flag_align_y<class_ParticlesMaterial_property_particle_flag_align_y>`.

- **PARTICLE_FLAG_ROTATE_Y** = **1** --- Use with :ref:`set_particle_flag<class_ParticlesMaterial_method_set_particle_flag>` to set :ref:`particle_flag_rotate_y<class_ParticlesMaterial_property_particle_flag_rotate_y>`.

- **PARTICLE_FLAG_DISABLE_Z** = **2** --- Use with :ref:`set_particle_flag<class_ParticlesMaterial_method_set_particle_flag>` to set :ref:`particle_flag_disable_z<class_ParticlesMaterial_property_particle_flag_disable_z>`.

- **PARTICLE_FLAG_MAX** = **3** --- Represents the size of the :ref:`ParticleFlags<enum_ParticlesMaterial_ParticleFlags>` enum.

----

.. _enum_ParticlesMaterial_EmissionShape:

.. _class_ParticlesMaterial_constant_EMISSION_SHAPE_POINT:

.. _class_ParticlesMaterial_constant_EMISSION_SHAPE_SPHERE:

.. _class_ParticlesMaterial_constant_EMISSION_SHAPE_BOX:

.. _class_ParticlesMaterial_constant_EMISSION_SHAPE_POINTS:

.. _class_ParticlesMaterial_constant_EMISSION_SHAPE_DIRECTED_POINTS:

.. _class_ParticlesMaterial_constant_EMISSION_SHAPE_RING:

.. _class_ParticlesMaterial_constant_EMISSION_SHAPE_MAX:

enum **EmissionShape**:

- **EMISSION_SHAPE_POINT** = **0** --- All particles will be emitted from a single point.

- **EMISSION_SHAPE_SPHERE** = **1** --- Particles will be emitted in the volume of a sphere.

- **EMISSION_SHAPE_BOX** = **2** --- Particles will be emitted in the volume of a box.

- **EMISSION_SHAPE_POINTS** = **3** --- Particles will be emitted at a position determined by sampling a random point on the :ref:`emission_point_texture<class_ParticlesMaterial_property_emission_point_texture>`. Particle color will be modulated by :ref:`emission_color_texture<class_ParticlesMaterial_property_emission_color_texture>`.

- **EMISSION_SHAPE_DIRECTED_POINTS** = **4** --- Particles will be emitted at a position determined by sampling a random point on the :ref:`emission_point_texture<class_ParticlesMaterial_property_emission_point_texture>`. Particle velocity and rotation will be set based on :ref:`emission_normal_texture<class_ParticlesMaterial_property_emission_normal_texture>`. Particle color will be modulated by :ref:`emission_color_texture<class_ParticlesMaterial_property_emission_color_texture>`.

- **EMISSION_SHAPE_RING** = **5** --- Particles will be emitted in a ring or cylinder.

- **EMISSION_SHAPE_MAX** = **6** --- Represents the size of the :ref:`EmissionShape<enum_ParticlesMaterial_EmissionShape>` enum.

----

.. _enum_ParticlesMaterial_SubEmitterMode:

.. _class_ParticlesMaterial_constant_SUB_EMITTER_DISABLED:

.. _class_ParticlesMaterial_constant_SUB_EMITTER_CONSTANT:

.. _class_ParticlesMaterial_constant_SUB_EMITTER_AT_END:

.. _class_ParticlesMaterial_constant_SUB_EMITTER_AT_COLLISION:

.. _class_ParticlesMaterial_constant_SUB_EMITTER_MAX:

enum **SubEmitterMode**:

- **SUB_EMITTER_DISABLED** = **0**

- **SUB_EMITTER_CONSTANT** = **1**

- **SUB_EMITTER_AT_END** = **2**

- **SUB_EMITTER_AT_COLLISION** = **3**

- **SUB_EMITTER_MAX** = **4**

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

.. _class_ParticlesMaterial_property_angle_curve:

- :ref:`Texture2D<class_Texture2D>` **angle_curve**

+----------+--------------------------+
| *Setter* | set_param_texture(value) |
+----------+--------------------------+
| *Getter* | get_param_texture()      |
+----------+--------------------------+

Each particle's rotation will be animated along this :ref:`CurveTexture<class_CurveTexture>`.

----

.. _class_ParticlesMaterial_property_angle_max:

- :ref:`float<class_float>` **angle_max**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_max(value) |
+-----------+----------------------+
| *Getter*  | get_param_max()      |
+-----------+----------------------+

Maximum angle.

----

.. _class_ParticlesMaterial_property_angle_min:

- :ref:`float<class_float>` **angle_min**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_min(value) |
+-----------+----------------------+
| *Getter*  | get_param_min()      |
+-----------+----------------------+

Minimum angle.

----

.. _class_ParticlesMaterial_property_angular_velocity_curve:

- :ref:`Texture2D<class_Texture2D>` **angular_velocity_curve**

+----------+--------------------------+
| *Setter* | set_param_texture(value) |
+----------+--------------------------+
| *Getter* | get_param_texture()      |
+----------+--------------------------+

Each particle's angular velocity will vary along this :ref:`CurveTexture<class_CurveTexture>`.

----

.. _class_ParticlesMaterial_property_angular_velocity_max:

- :ref:`float<class_float>` **angular_velocity_max**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_max(value) |
+-----------+----------------------+
| *Getter*  | get_param_max()      |
+-----------+----------------------+

Maximum angular velocity.

----

.. _class_ParticlesMaterial_property_angular_velocity_min:

- :ref:`float<class_float>` **angular_velocity_min**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_min(value) |
+-----------+----------------------+
| *Getter*  | get_param_min()      |
+-----------+----------------------+

Minimum angular velocity.

----

.. _class_ParticlesMaterial_property_anim_offset_curve:

- :ref:`Texture2D<class_Texture2D>` **anim_offset_curve**

+----------+--------------------------+
| *Setter* | set_param_texture(value) |
+----------+--------------------------+
| *Getter* | get_param_texture()      |
+----------+--------------------------+

Each particle's animation offset will vary along this :ref:`CurveTexture<class_CurveTexture>`.

----

.. _class_ParticlesMaterial_property_anim_offset_max:

- :ref:`float<class_float>` **anim_offset_max**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_max(value) |
+-----------+----------------------+
| *Getter*  | get_param_max()      |
+-----------+----------------------+

Maximum animation offset.

----

.. _class_ParticlesMaterial_property_anim_offset_min:

- :ref:`float<class_float>` **anim_offset_min**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_min(value) |
+-----------+----------------------+
| *Getter*  | get_param_min()      |
+-----------+----------------------+

Minimum animation offset.

----

.. _class_ParticlesMaterial_property_anim_speed_curve:

- :ref:`Texture2D<class_Texture2D>` **anim_speed_curve**

+----------+--------------------------+
| *Setter* | set_param_texture(value) |
+----------+--------------------------+
| *Getter* | get_param_texture()      |
+----------+--------------------------+

Each particle's animation speed will vary along this :ref:`CurveTexture<class_CurveTexture>`.

----

.. _class_ParticlesMaterial_property_anim_speed_max:

- :ref:`float<class_float>` **anim_speed_max**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_max(value) |
+-----------+----------------------+
| *Getter*  | get_param_max()      |
+-----------+----------------------+

Maximum particle animation speed.

----

.. _class_ParticlesMaterial_property_anim_speed_min:

- :ref:`float<class_float>` **anim_speed_min**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_min(value) |
+-----------+----------------------+
| *Getter*  | get_param_min()      |
+-----------+----------------------+

Minimum particle animation speed.

----

.. _class_ParticlesMaterial_property_attractor_interaction_enabled:

- :ref:`bool<class_bool>` **attractor_interaction_enabled**

+-----------+------------------------------------------+
| *Default* | ``true``                                 |
+-----------+------------------------------------------+
| *Setter*  | set_attractor_interaction_enabled(value) |
+-----------+------------------------------------------+
| *Getter*  | is_attractor_interaction_enabled()       |
+-----------+------------------------------------------+

True if the interaction with particle attractors is enabled.

----

.. _class_ParticlesMaterial_property_collision_bounce:

- :ref:`float<class_float>` **collision_bounce**

+-----------+-----------------------------+
| *Default* | ``0.0``                     |
+-----------+-----------------------------+
| *Setter*  | set_collision_bounce(value) |
+-----------+-----------------------------+
| *Getter*  | get_collision_bounce()      |
+-----------+-----------------------------+

Collision bouncyness.

----

.. _class_ParticlesMaterial_property_collision_enabled:

- :ref:`bool<class_bool>` **collision_enabled**

+-----------+------------------------------+
| *Default* | ``false``                    |
+-----------+------------------------------+
| *Setter*  | set_collision_enabled(value) |
+-----------+------------------------------+
| *Getter*  | is_collision_enabled()       |
+-----------+------------------------------+

True if collisions are enabled for this particle system.

----

.. _class_ParticlesMaterial_property_collision_friction:

- :ref:`float<class_float>` **collision_friction**

+-----------+-------------------------------+
| *Default* | ``0.0``                       |
+-----------+-------------------------------+
| *Setter*  | set_collision_friction(value) |
+-----------+-------------------------------+
| *Getter*  | get_collision_friction()      |
+-----------+-------------------------------+

Collision friction.

----

.. _class_ParticlesMaterial_property_collision_use_scale:

- :ref:`bool<class_bool>` **collision_use_scale**

+-----------+--------------------------------+
| *Default* | ``false``                      |
+-----------+--------------------------------+
| *Setter*  | set_collision_use_scale(value) |
+-----------+--------------------------------+
| *Getter*  | is_collision_using_scale()     |
+-----------+--------------------------------+

Should collision take scale into account.

----

.. _class_ParticlesMaterial_property_color:

- :ref:`Color<class_Color>` **color**

+-----------+-----------------------+
| *Default* | ``Color(1, 1, 1, 1)`` |
+-----------+-----------------------+
| *Setter*  | set_color(value)      |
+-----------+-----------------------+
| *Getter*  | get_color()           |
+-----------+-----------------------+

Each particle's initial color. If the :ref:`GPUParticles2D<class_GPUParticles2D>`'s ``texture`` is defined, it will be multiplied by this color. To have particle display color in a :ref:`BaseMaterial3D<class_BaseMaterial3D>` make sure to set :ref:`BaseMaterial3D.vertex_color_use_as_albedo<class_BaseMaterial3D_property_vertex_color_use_as_albedo>` to ``true``.

----

.. _class_ParticlesMaterial_property_color_ramp:

- :ref:`Texture2D<class_Texture2D>` **color_ramp**

+----------+-----------------------+
| *Setter* | set_color_ramp(value) |
+----------+-----------------------+
| *Getter* | get_color_ramp()      |
+----------+-----------------------+

Each particle's color will vary along this :ref:`GradientTexture1D<class_GradientTexture1D>` over its lifetime (multiplied with :ref:`color<class_ParticlesMaterial_property_color>`).

----

.. _class_ParticlesMaterial_property_damping_curve:

- :ref:`Texture2D<class_Texture2D>` **damping_curve**

+----------+--------------------------+
| *Setter* | set_param_texture(value) |
+----------+--------------------------+
| *Getter* | get_param_texture()      |
+----------+--------------------------+

Damping will vary along this :ref:`CurveTexture<class_CurveTexture>`.

----

.. _class_ParticlesMaterial_property_damping_max:

- :ref:`float<class_float>` **damping_max**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_max(value) |
+-----------+----------------------+
| *Getter*  | get_param_max()      |
+-----------+----------------------+

----

.. _class_ParticlesMaterial_property_damping_min:

- :ref:`float<class_float>` **damping_min**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_min(value) |
+-----------+----------------------+
| *Getter*  | get_param_min()      |
+-----------+----------------------+

----

.. _class_ParticlesMaterial_property_direction:

- :ref:`Vector3<class_Vector3>` **direction**

+-----------+----------------------+
| *Default* | ``Vector3(1, 0, 0)`` |
+-----------+----------------------+
| *Setter*  | set_direction(value) |
+-----------+----------------------+
| *Getter*  | get_direction()      |
+-----------+----------------------+

Unit vector specifying the particles' emission direction.

----

.. _class_ParticlesMaterial_property_emission_box_extents:

- :ref:`Vector3<class_Vector3>` **emission_box_extents**

+----------+---------------------------------+
| *Setter* | set_emission_box_extents(value) |
+----------+---------------------------------+
| *Getter* | get_emission_box_extents()      |
+----------+---------------------------------+

The box's extents if ``emission_shape`` is set to :ref:`EMISSION_SHAPE_BOX<class_ParticlesMaterial_constant_EMISSION_SHAPE_BOX>`.

----

.. _class_ParticlesMaterial_property_emission_color_texture:

- :ref:`Texture2D<class_Texture2D>` **emission_color_texture**

+----------+-----------------------------------+
| *Setter* | set_emission_color_texture(value) |
+----------+-----------------------------------+
| *Getter* | get_emission_color_texture()      |
+----------+-----------------------------------+

Particle color will be modulated by color determined by sampling this texture at the same point as the :ref:`emission_point_texture<class_ParticlesMaterial_property_emission_point_texture>`.

----

.. _class_ParticlesMaterial_property_emission_normal_texture:

- :ref:`Texture2D<class_Texture2D>` **emission_normal_texture**

+----------+------------------------------------+
| *Setter* | set_emission_normal_texture(value) |
+----------+------------------------------------+
| *Getter* | get_emission_normal_texture()      |
+----------+------------------------------------+

Particle velocity and rotation will be set by sampling this texture at the same point as the :ref:`emission_point_texture<class_ParticlesMaterial_property_emission_point_texture>`. Used only in :ref:`EMISSION_SHAPE_DIRECTED_POINTS<class_ParticlesMaterial_constant_EMISSION_SHAPE_DIRECTED_POINTS>`. Can be created automatically from mesh or node by selecting "Create Emission Points from Mesh/Node" under the "Particles" tool in the toolbar.

----

.. _class_ParticlesMaterial_property_emission_point_count:

- :ref:`int<class_int>` **emission_point_count**

+----------+---------------------------------+
| *Setter* | set_emission_point_count(value) |
+----------+---------------------------------+
| *Getter* | get_emission_point_count()      |
+----------+---------------------------------+

The number of emission points if ``emission_shape`` is set to :ref:`EMISSION_SHAPE_POINTS<class_ParticlesMaterial_constant_EMISSION_SHAPE_POINTS>` or :ref:`EMISSION_SHAPE_DIRECTED_POINTS<class_ParticlesMaterial_constant_EMISSION_SHAPE_DIRECTED_POINTS>`.

----

.. _class_ParticlesMaterial_property_emission_point_texture:

- :ref:`Texture2D<class_Texture2D>` **emission_point_texture**

+----------+-----------------------------------+
| *Setter* | set_emission_point_texture(value) |
+----------+-----------------------------------+
| *Getter* | get_emission_point_texture()      |
+----------+-----------------------------------+

Particles will be emitted at positions determined by sampling this texture at a random position. Used with :ref:`EMISSION_SHAPE_POINTS<class_ParticlesMaterial_constant_EMISSION_SHAPE_POINTS>` and :ref:`EMISSION_SHAPE_DIRECTED_POINTS<class_ParticlesMaterial_constant_EMISSION_SHAPE_DIRECTED_POINTS>`. Can be created automatically from mesh or node by selecting "Create Emission Points from Mesh/Node" under the "Particles" tool in the toolbar.

----

.. _class_ParticlesMaterial_property_emission_ring_axis:

- :ref:`Vector3<class_Vector3>` **emission_ring_axis**

+----------+-------------------------------+
| *Setter* | set_emission_ring_axis(value) |
+----------+-------------------------------+
| *Getter* | get_emission_ring_axis()      |
+----------+-------------------------------+

The axis of the ring when using the emitter :ref:`EMISSION_SHAPE_RING<class_ParticlesMaterial_constant_EMISSION_SHAPE_RING>`.

----

.. _class_ParticlesMaterial_property_emission_ring_height:

- :ref:`float<class_float>` **emission_ring_height**

+----------+---------------------------------+
| *Setter* | set_emission_ring_height(value) |
+----------+---------------------------------+
| *Getter* | get_emission_ring_height()      |
+----------+---------------------------------+

The height of the ring when using the emitter :ref:`EMISSION_SHAPE_RING<class_ParticlesMaterial_constant_EMISSION_SHAPE_RING>`.

----

.. _class_ParticlesMaterial_property_emission_ring_inner_radius:

- :ref:`float<class_float>` **emission_ring_inner_radius**

+----------+---------------------------------------+
| *Setter* | set_emission_ring_inner_radius(value) |
+----------+---------------------------------------+
| *Getter* | get_emission_ring_inner_radius()      |
+----------+---------------------------------------+

The inner radius of the ring when using the emitter :ref:`EMISSION_SHAPE_RING<class_ParticlesMaterial_constant_EMISSION_SHAPE_RING>`.

----

.. _class_ParticlesMaterial_property_emission_ring_radius:

- :ref:`float<class_float>` **emission_ring_radius**

+----------+---------------------------------+
| *Setter* | set_emission_ring_radius(value) |
+----------+---------------------------------+
| *Getter* | get_emission_ring_radius()      |
+----------+---------------------------------+

The radius of the ring when using the emitter :ref:`EMISSION_SHAPE_RING<class_ParticlesMaterial_constant_EMISSION_SHAPE_RING>`.

----

.. _class_ParticlesMaterial_property_emission_shape:

- :ref:`EmissionShape<enum_ParticlesMaterial_EmissionShape>` **emission_shape**

+-----------+---------------------------+
| *Default* | ``0``                     |
+-----------+---------------------------+
| *Setter*  | set_emission_shape(value) |
+-----------+---------------------------+
| *Getter*  | get_emission_shape()      |
+-----------+---------------------------+

Particles will be emitted inside this region. Use :ref:`EmissionShape<enum_ParticlesMaterial_EmissionShape>` constants for values.

----

.. _class_ParticlesMaterial_property_emission_sphere_radius:

- :ref:`float<class_float>` **emission_sphere_radius**

+----------+-----------------------------------+
| *Setter* | set_emission_sphere_radius(value) |
+----------+-----------------------------------+
| *Getter* | get_emission_sphere_radius()      |
+----------+-----------------------------------+

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

----

.. _class_ParticlesMaterial_property_flatness:

- :ref:`float<class_float>` **flatness**

+-----------+---------------------+
| *Default* | ``0.0``             |
+-----------+---------------------+
| *Setter*  | set_flatness(value) |
+-----------+---------------------+
| *Getter*  | get_flatness()      |
+-----------+---------------------+

Amount of :ref:`spread<class_ParticlesMaterial_property_spread>` along the Y axis.

----

.. _class_ParticlesMaterial_property_gravity:

- :ref:`Vector3<class_Vector3>` **gravity**

+-----------+-------------------------+
| *Default* | ``Vector3(0, -9.8, 0)`` |
+-----------+-------------------------+
| *Setter*  | set_gravity(value)      |
+-----------+-------------------------+
| *Getter*  | get_gravity()           |
+-----------+-------------------------+

Gravity applied to every particle.

----

.. _class_ParticlesMaterial_property_hue_variation_curve:

- :ref:`Texture2D<class_Texture2D>` **hue_variation_curve**

+----------+--------------------------+
| *Setter* | set_param_texture(value) |
+----------+--------------------------+
| *Getter* | get_param_texture()      |
+----------+--------------------------+

Each particle's hue will vary along this :ref:`CurveTexture<class_CurveTexture>`.

----

.. _class_ParticlesMaterial_property_hue_variation_max:

- :ref:`float<class_float>` **hue_variation_max**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_max(value) |
+-----------+----------------------+
| *Getter*  | get_param_max()      |
+-----------+----------------------+

Maximum hue variation.

----

.. _class_ParticlesMaterial_property_hue_variation_min:

- :ref:`float<class_float>` **hue_variation_min**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_min(value) |
+-----------+----------------------+
| *Getter*  | get_param_min()      |
+-----------+----------------------+

Minimum hue variation.

----

.. _class_ParticlesMaterial_property_initial_velocity_max:

- :ref:`float<class_float>` **initial_velocity_max**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_max(value) |
+-----------+----------------------+
| *Getter*  | get_param_max()      |
+-----------+----------------------+

Maximum initial velocity.

----

.. _class_ParticlesMaterial_property_initial_velocity_min:

- :ref:`float<class_float>` **initial_velocity_min**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_min(value) |
+-----------+----------------------+
| *Getter*  | get_param_min()      |
+-----------+----------------------+

Minimum initial velocity.

----

.. _class_ParticlesMaterial_property_lifetime_randomness:

- :ref:`float<class_float>` **lifetime_randomness**

+-----------+--------------------------------+
| *Default* | ``0.0``                        |
+-----------+--------------------------------+
| *Setter*  | set_lifetime_randomness(value) |
+-----------+--------------------------------+
| *Getter*  | get_lifetime_randomness()      |
+-----------+--------------------------------+

Particle lifetime randomness ratio.

----

.. _class_ParticlesMaterial_property_linear_accel_curve:

- :ref:`Texture2D<class_Texture2D>` **linear_accel_curve**

+----------+--------------------------+
| *Setter* | set_param_texture(value) |
+----------+--------------------------+
| *Getter* | get_param_texture()      |
+----------+--------------------------+

Each particle's linear acceleration will vary along this :ref:`CurveTexture<class_CurveTexture>`.

----

.. _class_ParticlesMaterial_property_linear_accel_max:

- :ref:`float<class_float>` **linear_accel_max**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_max(value) |
+-----------+----------------------+
| *Getter*  | get_param_max()      |
+-----------+----------------------+

Maximum linear acceleration.

----

.. _class_ParticlesMaterial_property_linear_accel_min:

- :ref:`float<class_float>` **linear_accel_min**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_min(value) |
+-----------+----------------------+
| *Getter*  | get_param_min()      |
+-----------+----------------------+

Minimum linear acceleration.

----

.. _class_ParticlesMaterial_property_orbit_velocity_curve:

- :ref:`Texture2D<class_Texture2D>` **orbit_velocity_curve**

+----------+--------------------------+
| *Setter* | set_param_texture(value) |
+----------+--------------------------+
| *Getter* | get_param_texture()      |
+----------+--------------------------+

Each particle's orbital velocity will vary along this :ref:`CurveTexture<class_CurveTexture>`.

----

.. _class_ParticlesMaterial_property_orbit_velocity_max:

- :ref:`float<class_float>` **orbit_velocity_max**

+----------+----------------------+
| *Setter* | set_param_max(value) |
+----------+----------------------+
| *Getter* | get_param_max()      |
+----------+----------------------+

Maximum orbit velocity.

----

.. _class_ParticlesMaterial_property_orbit_velocity_min:

- :ref:`float<class_float>` **orbit_velocity_min**

+----------+----------------------+
| *Setter* | set_param_min(value) |
+----------+----------------------+
| *Getter* | get_param_min()      |
+----------+----------------------+

Minimum orbit velocity.

----

.. _class_ParticlesMaterial_property_particle_flag_align_y:

- :ref:`bool<class_bool>` **particle_flag_align_y**

+-----------+--------------------------+
| *Default* | ``false``                |
+-----------+--------------------------+
| *Setter*  | set_particle_flag(value) |
+-----------+--------------------------+
| *Getter*  | get_particle_flag()      |
+-----------+--------------------------+

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

----

.. _class_ParticlesMaterial_property_particle_flag_disable_z:

- :ref:`bool<class_bool>` **particle_flag_disable_z**

+-----------+--------------------------+
| *Default* | ``false``                |
+-----------+--------------------------+
| *Setter*  | set_particle_flag(value) |
+-----------+--------------------------+
| *Getter*  | get_particle_flag()      |
+-----------+--------------------------+

If ``true``, particles will not move on the z axis.

----

.. _class_ParticlesMaterial_property_particle_flag_rotate_y:

- :ref:`bool<class_bool>` **particle_flag_rotate_y**

+-----------+--------------------------+
| *Default* | ``false``                |
+-----------+--------------------------+
| *Setter*  | set_particle_flag(value) |
+-----------+--------------------------+
| *Getter*  | get_particle_flag()      |
+-----------+--------------------------+

If ``true``, particles rotate around Y axis by :ref:`angle_min<class_ParticlesMaterial_property_angle_min>`.

----

.. _class_ParticlesMaterial_property_radial_accel_curve:

- :ref:`Texture2D<class_Texture2D>` **radial_accel_curve**

+----------+--------------------------+
| *Setter* | set_param_texture(value) |
+----------+--------------------------+
| *Getter* | get_param_texture()      |
+----------+--------------------------+

Each particle's radial acceleration will vary along this :ref:`CurveTexture<class_CurveTexture>`.

----

.. _class_ParticlesMaterial_property_radial_accel_max:

- :ref:`float<class_float>` **radial_accel_max**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_max(value) |
+-----------+----------------------+
| *Getter*  | get_param_max()      |
+-----------+----------------------+

Maximum radial acceleration.

----

.. _class_ParticlesMaterial_property_radial_accel_min:

- :ref:`float<class_float>` **radial_accel_min**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_min(value) |
+-----------+----------------------+
| *Getter*  | get_param_min()      |
+-----------+----------------------+

Minimum radial acceleration.

----

.. _class_ParticlesMaterial_property_scale_curve:

- :ref:`Texture2D<class_Texture2D>` **scale_curve**

+----------+--------------------------+
| *Setter* | set_param_texture(value) |
+----------+--------------------------+
| *Getter* | get_param_texture()      |
+----------+--------------------------+

Each particle's scale will vary along this :ref:`CurveTexture<class_CurveTexture>`. If a :ref:`CurveXYZTexture<class_CurveXYZTexture>` is supplied instead, the scale will be separated per-axis.

----

.. _class_ParticlesMaterial_property_scale_max:

- :ref:`float<class_float>` **scale_max**

+-----------+----------------------+
| *Default* | ``1.0``              |
+-----------+----------------------+
| *Setter*  | set_param_max(value) |
+-----------+----------------------+
| *Getter*  | get_param_max()      |
+-----------+----------------------+

Maximum scale.

----

.. _class_ParticlesMaterial_property_scale_min:

- :ref:`float<class_float>` **scale_min**

+-----------+----------------------+
| *Default* | ``1.0``              |
+-----------+----------------------+
| *Setter*  | set_param_min(value) |
+-----------+----------------------+
| *Getter*  | get_param_min()      |
+-----------+----------------------+

Minimum scale.

----

.. _class_ParticlesMaterial_property_spread:

- :ref:`float<class_float>` **spread**

+-----------+-------------------+
| *Default* | ``45.0``          |
+-----------+-------------------+
| *Setter*  | set_spread(value) |
+-----------+-------------------+
| *Getter*  | get_spread()      |
+-----------+-------------------+

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

----

.. _class_ParticlesMaterial_property_sub_emitter_amount_at_end:

- :ref:`int<class_int>` **sub_emitter_amount_at_end**

+----------+--------------------------------------+
| *Setter* | set_sub_emitter_amount_at_end(value) |
+----------+--------------------------------------+
| *Getter* | get_sub_emitter_amount_at_end()      |
+----------+--------------------------------------+

----

.. _class_ParticlesMaterial_property_sub_emitter_frequency:

- :ref:`float<class_float>` **sub_emitter_frequency**

+----------+----------------------------------+
| *Setter* | set_sub_emitter_frequency(value) |
+----------+----------------------------------+
| *Getter* | get_sub_emitter_frequency()      |
+----------+----------------------------------+

----

.. _class_ParticlesMaterial_property_sub_emitter_keep_velocity:

- :ref:`bool<class_bool>` **sub_emitter_keep_velocity**

+-----------+--------------------------------------+
| *Default* | ``false``                            |
+-----------+--------------------------------------+
| *Setter*  | set_sub_emitter_keep_velocity(value) |
+-----------+--------------------------------------+
| *Getter*  | get_sub_emitter_keep_velocity()      |
+-----------+--------------------------------------+

----

.. _class_ParticlesMaterial_property_sub_emitter_mode:

- :ref:`SubEmitterMode<enum_ParticlesMaterial_SubEmitterMode>` **sub_emitter_mode**

+-----------+-----------------------------+
| *Default* | ``0``                       |
+-----------+-----------------------------+
| *Setter*  | set_sub_emitter_mode(value) |
+-----------+-----------------------------+
| *Getter*  | get_sub_emitter_mode()      |
+-----------+-----------------------------+

----

.. _class_ParticlesMaterial_property_tangential_accel_curve:

- :ref:`Texture2D<class_Texture2D>` **tangential_accel_curve**

+----------+--------------------------+
| *Setter* | set_param_texture(value) |
+----------+--------------------------+
| *Getter* | get_param_texture()      |
+----------+--------------------------+

Each particle's tangential acceleration will vary along this :ref:`CurveTexture<class_CurveTexture>`.

----

.. _class_ParticlesMaterial_property_tangential_accel_max:

- :ref:`float<class_float>` **tangential_accel_max**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_max(value) |
+-----------+----------------------+
| *Getter*  | get_param_max()      |
+-----------+----------------------+

Maximum tangential acceleration.

----

.. _class_ParticlesMaterial_property_tangential_accel_min:

- :ref:`float<class_float>` **tangential_accel_min**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_param_min(value) |
+-----------+----------------------+
| *Getter*  | get_param_min()      |
+-----------+----------------------+

Minimum tangential acceleration.

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

.. _class_ParticlesMaterial_method_get_param_max:

- :ref:`float<class_float>` **get_param_max** **(** :ref:`Parameter<enum_ParticlesMaterial_Parameter>` param **)** |const|

Return the maximum value range for the given prameter.

----

.. _class_ParticlesMaterial_method_get_param_min:

- :ref:`float<class_float>` **get_param_min** **(** :ref:`Parameter<enum_ParticlesMaterial_Parameter>` param **)** |const|

Return the minimum value range for the given parameter.

----

.. _class_ParticlesMaterial_method_get_param_texture:

- :ref:`Texture2D<class_Texture2D>` **get_param_texture** **(** :ref:`Parameter<enum_ParticlesMaterial_Parameter>` param **)** |const|

Returns the :ref:`Texture2D<class_Texture2D>` used by the specified parameter.

----

.. _class_ParticlesMaterial_method_get_particle_flag:

- :ref:`bool<class_bool>` **get_particle_flag** **(** :ref:`ParticleFlags<enum_ParticlesMaterial_ParticleFlags>` particle_flag **)** |const|

Returns ``true`` if the specified particle flag is enabled. See :ref:`ParticleFlags<enum_ParticlesMaterial_ParticleFlags>` for options.

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.. _class_ParticlesMaterial_method_set_param_max:

- void **set_param_max** **(** :ref:`Parameter<enum_ParticlesMaterial_Parameter>` param, :ref:`float<class_float>` value **)**

Sets the maximum value range for the given parameter.

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.. _class_ParticlesMaterial_method_set_param_min:

- void **set_param_min** **(** :ref:`Parameter<enum_ParticlesMaterial_Parameter>` param, :ref:`float<class_float>` value **)**

Sets the minimum value range for the given parameter.

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.. _class_ParticlesMaterial_method_set_param_texture:

- void **set_param_texture** **(** :ref:`Parameter<enum_ParticlesMaterial_Parameter>` param, :ref:`Texture2D<class_Texture2D>` texture **)**

Sets the :ref:`Texture2D<class_Texture2D>` for the specified :ref:`Parameter<enum_ParticlesMaterial_Parameter>`.

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.. _class_ParticlesMaterial_method_set_particle_flag:

- void **set_particle_flag** **(** :ref:`ParticleFlags<enum_ParticlesMaterial_ParticleFlags>` particle_flag, :ref:`bool<class_bool>` enable **)**

If ``true``, enables the specified particle flag. See :ref:`ParticleFlags<enum_ParticlesMaterial_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.)`