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<?xml version="1.0" encoding="UTF-8" ?>
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<class name= "ParticlesMaterial" inherits= "Material" version= "4.0" >
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<brief_description >
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Particle properties for [GPUParticles3D] and [GPUParticles2D] nodes.
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</brief_description>
<description >
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ParticlesMaterial defines particle properties and behavior. It is used in the [code]process_material[/code] of [GPUParticles3D] and [GPUParticles2D] emitter nodes.
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Some of this material's properties are applied to each particle when emitted, while others can have a [CurveTexture] applied to vary values over the lifetime of the particle.
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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 [code]1.0[/code] 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 [code]0.4[/code] would scale the original property between [code]0.4-1.0[/code] of its original value.
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</description>
<tutorials >
</tutorials>
<methods >
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<method name= "get_param" qualifiers= "const" >
<return type= "float" >
</return>
<argument index= "0" name= "param" type= "int" enum= "ParticlesMaterial.Parameter" >
</argument>
<description >
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Returns the value of the specified parameter.
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</description>
</method>
<method name= "get_param_randomness" qualifiers= "const" >
<return type= "float" >
</return>
<argument index= "0" name= "param" type= "int" enum= "ParticlesMaterial.Parameter" >
</argument>
<description >
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Returns the randomness ratio associated with the specified parameter.
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</description>
</method>
<method name= "get_param_texture" qualifiers= "const" >
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<return type= "Texture2D" >
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</return>
<argument index= "0" name= "param" type= "int" enum= "ParticlesMaterial.Parameter" >
</argument>
<description >
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Returns the [Texture2D] used by the specified parameter.
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</description>
</method>
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<method name= "get_particle_flag" qualifiers= "const" >
<return type= "bool" >
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</return>
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<argument index= "0" name= "particle_flag" type= "int" enum= "ParticlesMaterial.ParticleFlags" >
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</argument>
<description >
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Returns [code]true[/code] if the specified particle flag is enabled. See [enum ParticleFlags] for options.
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</description>
</method>
<method name= "set_param" >
<return type= "void" >
</return>
<argument index= "0" name= "param" type= "int" enum= "ParticlesMaterial.Parameter" >
</argument>
<argument index= "1" name= "value" type= "float" >
</argument>
<description >
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Sets the specified [enum Parameter].
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</description>
</method>
<method name= "set_param_randomness" >
<return type= "void" >
</return>
<argument index= "0" name= "param" type= "int" enum= "ParticlesMaterial.Parameter" >
</argument>
<argument index= "1" name= "randomness" type= "float" >
</argument>
<description >
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Sets the randomness ratio for the specified [enum Parameter].
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</description>
</method>
<method name= "set_param_texture" >
<return type= "void" >
</return>
<argument index= "0" name= "param" type= "int" enum= "ParticlesMaterial.Parameter" >
</argument>
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<argument index= "1" name= "texture" type= "Texture2D" >
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</argument>
<description >
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Sets the [Texture2D] for the specified [enum Parameter].
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</description>
</method>
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<method name= "set_particle_flag" >
<return type= "void" >
</return>
<argument index= "0" name= "particle_flag" type= "int" enum= "ParticlesMaterial.ParticleFlags" >
</argument>
<argument index= "1" name= "enable" type= "bool" >
</argument>
<description >
If [code]true[/code], enables the specified particle flag. See [enum ParticleFlags] for options.
</description>
</method>
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</methods>
<members >
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<member name= "angle" type= "float" setter= "set_param" getter= "get_param" default= "0.0" >
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Initial rotation applied to each particle, in degrees.
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Only applied when [member particle_flag_disable_z] or [member particle_flag_rotate_y] are [code]true[/code] or the [BaseMaterial3D] being used to draw the particle is using [constant BaseMaterial3D.BILLBOARD_PARTICLES].
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</member>
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<member name= "angle_curve" type= "Texture2D" setter= "set_param_texture" getter= "get_param_texture" >
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Each particle's rotation will be animated along this [CurveTexture].
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</member>
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<member name= "angle_random" type= "float" setter= "set_param_randomness" getter= "get_param_randomness" default= "0.0" >
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Rotation randomness ratio.
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</member>
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<member name= "angular_velocity" type= "float" setter= "set_param" getter= "get_param" default= "0.0" >
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Initial angular velocity applied to each particle. Sets the speed of rotation of the particle.
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Only applied when [member particle_flag_disable_z] or [member particle_flag_rotate_y] are [code]true[/code] or the [BaseMaterial3D] being used to draw the particle is using [constant BaseMaterial3D.BILLBOARD_PARTICLES].
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</member>
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<member name= "angular_velocity_curve" type= "Texture2D" setter= "set_param_texture" getter= "get_param_texture" >
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Each particle's angular velocity will vary along this [CurveTexture].
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</member>
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<member name= "angular_velocity_random" type= "float" setter= "set_param_randomness" getter= "get_param_randomness" default= "0.0" >
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Angular velocity randomness ratio.
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</member>
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<member name= "anim_offset" type= "float" setter= "set_param" getter= "get_param" default= "0.0" >
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Particle animation offset.
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</member>
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<member name= "anim_offset_curve" type= "Texture2D" setter= "set_param_texture" getter= "get_param_texture" >
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Each particle's animation offset will vary along this [CurveTexture].
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</member>
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<member name= "anim_offset_random" type= "float" setter= "set_param_randomness" getter= "get_param_randomness" default= "0.0" >
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Animation offset randomness ratio.
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</member>
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<member name= "anim_speed" type= "float" setter= "set_param" getter= "get_param" default= "0.0" >
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Particle animation speed.
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</member>
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<member name= "anim_speed_curve" type= "Texture2D" setter= "set_param_texture" getter= "get_param_texture" >
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Each particle's animation speed will vary along this [CurveTexture].
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</member>
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<member name= "anim_speed_random" type= "float" setter= "set_param_randomness" getter= "get_param_randomness" default= "0.0" >
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Animation speed randomness ratio.
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</member>
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<member name= "attractor_interaction_enabled" type= "bool" setter= "set_attractor_interaction_enabled" getter= "is_attractor_interaction_enabled" default= "true" >
</member>
<member name= "collision_bounce" type= "float" setter= "set_collision_bounce" getter= "get_collision_bounce" default= "0.0" >
</member>
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<member name= "collision_enabled" type= "bool" setter= "set_collision_enabled" getter= "is_collision_enabled" default= "false" >
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</member>
<member name= "collision_friction" type= "float" setter= "set_collision_friction" getter= "get_collision_friction" default= "0.0" >
</member>
<member name= "collision_use_scale" type= "bool" setter= "set_collision_use_scale" getter= "is_collision_using_scale" default= "false" >
</member>
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<member name= "color" type= "Color" setter= "set_color" getter= "get_color" default= "Color(1, 1, 1, 1)" >
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Each particle's initial color. If the [GPUParticles2D]'s [code]texture[/code] is defined, it will be multiplied by this color. To have particle display color in a [BaseMaterial3D] make sure to set [member BaseMaterial3D.vertex_color_use_as_albedo] to [code]true[/code].
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</member>
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<member name= "color_ramp" type= "Texture2D" setter= "set_color_ramp" getter= "get_color_ramp" >
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Each particle's color will vary along this [GradientTexture] over its lifetime (multiplied with [member color]).
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</member>
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<member name= "damping" type= "float" setter= "set_param" getter= "get_param" default= "0.0" >
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The rate at which particles lose velocity.
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</member>
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<member name= "damping_curve" type= "Texture2D" setter= "set_param_texture" getter= "get_param_texture" >
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Damping will vary along this [CurveTexture].
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</member>
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<member name= "damping_random" type= "float" setter= "set_param_randomness" getter= "get_param_randomness" default= "0.0" >
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Damping randomness ratio.
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</member>
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<member name= "direction" type= "Vector3" setter= "set_direction" getter= "get_direction" default= "Vector3(1, 0, 0)" >
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Unit vector specifying the particles' emission direction.
</member>
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<member name= "emission_box_extents" type= "Vector3" setter= "set_emission_box_extents" getter= "get_emission_box_extents" >
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The box's extents if [code]emission_shape[/code] is set to [constant EMISSION_SHAPE_BOX].
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</member>
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<member name= "emission_color_texture" type= "Texture2D" setter= "set_emission_color_texture" getter= "get_emission_color_texture" >
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Particle color will be modulated by color determined by sampling this texture at the same point as the [member emission_point_texture].
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</member>
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<member name= "emission_normal_texture" type= "Texture2D" setter= "set_emission_normal_texture" getter= "get_emission_normal_texture" >
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Particle velocity and rotation will be set by sampling this texture at the same point as the [member emission_point_texture]. Used only in [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.
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</member>
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<member name= "emission_point_count" type= "int" setter= "set_emission_point_count" getter= "get_emission_point_count" >
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The number of emission points if [code]emission_shape[/code] is set to [constant EMISSION_SHAPE_POINTS] or [constant EMISSION_SHAPE_DIRECTED_POINTS].
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</member>
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<member name= "emission_point_texture" type= "Texture2D" setter= "set_emission_point_texture" getter= "get_emission_point_texture" >
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Particles will be emitted at positions determined by sampling this texture at a random position. Used with [constant EMISSION_SHAPE_POINTS] and [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.
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</member>
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<member name= "emission_shape" type= "int" setter= "set_emission_shape" getter= "get_emission_shape" enum= "ParticlesMaterial.EmissionShape" default= "0" >
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Particles will be emitted inside this region. Use [enum EmissionShape] constants for values.
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</member>
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<member name= "emission_sphere_radius" type= "float" setter= "set_emission_sphere_radius" getter= "get_emission_sphere_radius" >
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The sphere's radius if [code]emission_shape[/code] is set to [constant EMISSION_SHAPE_SPHERE].
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</member>
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<member name= "flatness" type= "float" setter= "set_flatness" getter= "get_flatness" default= "0.0" >
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Amount of [member spread] along the Y axis.
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</member>
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<member name= "gravity" type= "Vector3" setter= "set_gravity" getter= "get_gravity" default= "Vector3(0, -9.8, 0)" >
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Gravity applied to every particle.
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</member>
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<member name= "hue_variation" type= "float" setter= "set_param" getter= "get_param" default= "0.0" >
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Initial hue variation applied to each particle.
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</member>
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<member name= "hue_variation_curve" type= "Texture2D" setter= "set_param_texture" getter= "get_param_texture" >
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Each particle's hue will vary along this [CurveTexture].
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</member>
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<member name= "hue_variation_random" type= "float" setter= "set_param_randomness" getter= "get_param_randomness" default= "0.0" >
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Hue variation randomness ratio.
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</member>
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<member name= "initial_velocity" type= "float" setter= "set_param" getter= "get_param" default= "0.0" >
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Initial velocity magnitude for each particle. Direction comes from [member spread] and the node's orientation.
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</member>
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<member name= "initial_velocity_random" type= "float" setter= "set_param_randomness" getter= "get_param_randomness" default= "0.0" >
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Initial velocity randomness ratio.
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</member>
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<member name= "lifetime_randomness" type= "float" setter= "set_lifetime_randomness" getter= "get_lifetime_randomness" default= "0.0" >
Particle lifetime randomness ratio.
</member>
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<member name= "linear_accel" type= "float" setter= "set_param" getter= "get_param" default= "0.0" >
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Linear acceleration applied to each particle in the direction of motion.
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</member>
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<member name= "linear_accel_curve" type= "Texture2D" setter= "set_param_texture" getter= "get_param_texture" >
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Each particle's linear acceleration will vary along this [CurveTexture].
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</member>
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<member name= "linear_accel_random" type= "float" setter= "set_param_randomness" getter= "get_param_randomness" default= "0.0" >
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Linear acceleration randomness ratio.
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</member>
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<member name= "orbit_velocity" type= "float" setter= "set_param" getter= "get_param" >
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Orbital velocity applied to each particle. Makes the particles circle around origin. Specified in number of full rotations around origin per second.
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Only available when [member particle_flag_disable_z] is [code]true[/code].
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</member>
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<member name= "orbit_velocity_curve" type= "Texture2D" setter= "set_param_texture" getter= "get_param_texture" >
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Each particle's orbital velocity will vary along this [CurveTexture].
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</member>
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<member name= "orbit_velocity_random" type= "float" setter= "set_param_randomness" getter= "get_param_randomness" >
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Orbital velocity randomness ratio.
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</member>
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<member name= "particle_flag_align_y" type= "bool" setter= "set_particle_flag" getter= "get_particle_flag" default= "false" >
Align Y axis of particle with the direction of its velocity.
</member>
<member name= "particle_flag_disable_z" type= "bool" setter= "set_particle_flag" getter= "get_particle_flag" default= "false" >
If [code]true[/code], particles will not move on the z axis.
</member>
<member name= "particle_flag_rotate_y" type= "bool" setter= "set_particle_flag" getter= "get_particle_flag" default= "false" >
If [code]true[/code], particles rotate around Y axis by [member angle].
</member>
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<member name= "radial_accel" type= "float" setter= "set_param" getter= "get_param" default= "0.0" >
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Radial acceleration applied to each particle. Makes particle accelerate away from origin.
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</member>
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<member name= "radial_accel_curve" type= "Texture2D" setter= "set_param_texture" getter= "get_param_texture" >
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Each particle's radial acceleration will vary along this [CurveTexture].
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</member>
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<member name= "radial_accel_random" type= "float" setter= "set_param_randomness" getter= "get_param_randomness" default= "0.0" >
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Radial acceleration randomness ratio.
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</member>
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<member name= "scale" type= "float" setter= "set_param" getter= "get_param" default= "1.0" >
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Initial scale applied to each particle.
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</member>
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<member name= "scale_curve" type= "Texture2D" setter= "set_param_texture" getter= "get_param_texture" >
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Each particle's scale will vary along this [CurveTexture].
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</member>
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<member name= "scale_random" type= "float" setter= "set_param_randomness" getter= "get_param_randomness" default= "0.0" >
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Scale randomness ratio.
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</member>
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<member name= "spread" type= "float" setter= "set_spread" getter= "get_spread" default= "45.0" >
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Each particle's initial direction range from [code]+spread[/code] to [code]-spread[/code] degrees.
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</member>
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<member name= "sub_emitter_amount_at_end" type= "int" setter= "set_sub_emitter_amount_at_end" getter= "get_sub_emitter_amount_at_end" >
</member>
<member name= "sub_emitter_frequency" type= "float" setter= "set_sub_emitter_frequency" getter= "get_sub_emitter_frequency" >
</member>
<member name= "sub_emitter_keep_velocity" type= "bool" setter= "set_sub_emitter_keep_velocity" getter= "get_sub_emitter_keep_velocity" default= "false" >
</member>
<member name= "sub_emitter_mode" type= "int" setter= "set_sub_emitter_mode" getter= "get_sub_emitter_mode" enum= "ParticlesMaterial.SubEmitterMode" default= "0" >
</member>
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<member name= "tangential_accel" type= "float" setter= "set_param" getter= "get_param" default= "0.0" >
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Tangential acceleration applied to each particle. Tangential acceleration is perpendicular to the particle's velocity giving the particles a swirling motion.
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</member>
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<member name= "tangential_accel_curve" type= "Texture2D" setter= "set_param_texture" getter= "get_param_texture" >
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Each particle's tangential acceleration will vary along this [CurveTexture].
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</member>
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<member name= "tangential_accel_random" type= "float" setter= "set_param_randomness" getter= "get_param_randomness" default= "0.0" >
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Tangential acceleration randomness ratio.
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</member>
</members>
<constants >
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<constant name= "PARAM_INITIAL_LINEAR_VELOCITY" value= "0" enum= "Parameter" >
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Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set initial velocity properties.
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</constant>
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<constant name= "PARAM_ANGULAR_VELOCITY" value= "1" enum= "Parameter" >
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Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set angular velocity properties.
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</constant>
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<constant name= "PARAM_ORBIT_VELOCITY" value= "2" enum= "Parameter" >
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Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set orbital velocity properties.
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</constant>
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<constant name= "PARAM_LINEAR_ACCEL" value= "3" enum= "Parameter" >
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Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set linear acceleration properties.
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</constant>
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<constant name= "PARAM_RADIAL_ACCEL" value= "4" enum= "Parameter" >
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Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set radial acceleration properties.
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</constant>
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<constant name= "PARAM_TANGENTIAL_ACCEL" value= "5" enum= "Parameter" >
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Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set tangential acceleration properties.
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</constant>
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<constant name= "PARAM_DAMPING" value= "6" enum= "Parameter" >
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Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set damping properties.
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</constant>
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<constant name= "PARAM_ANGLE" value= "7" enum= "Parameter" >
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Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set angle properties.
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</constant>
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<constant name= "PARAM_SCALE" value= "8" enum= "Parameter" >
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Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set scale properties.
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</constant>
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<constant name= "PARAM_HUE_VARIATION" value= "9" enum= "Parameter" >
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Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set hue variation properties.
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</constant>
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<constant name= "PARAM_ANIM_SPEED" value= "10" enum= "Parameter" >
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Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set animation speed properties.
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</constant>
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<constant name= "PARAM_ANIM_OFFSET" value= "11" enum= "Parameter" >
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Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set animation offset properties.
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</constant>
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<constant name= "PARAM_MAX" value= "12" enum= "Parameter" >
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Represents the size of the [enum Parameter] enum.
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</constant>
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<constant name= "PARTICLE_FLAG_ALIGN_Y_TO_VELOCITY" value= "0" enum= "ParticleFlags" >
Use with [method set_particle_flag] to set [member particle_flag_align_y].
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</constant>
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<constant name= "PARTICLE_FLAG_ROTATE_Y" value= "1" enum= "ParticleFlags" >
Use with [method set_particle_flag] to set [member particle_flag_rotate_y].
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</constant>
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<constant name= "PARTICLE_FLAG_DISABLE_Z" value= "2" enum= "ParticleFlags" >
Use with [method set_particle_flag] to set [member particle_flag_disable_z].
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</constant>
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<constant name= "PARTICLE_FLAG_MAX" value= "3" enum= "ParticleFlags" >
Represents the size of the [enum ParticleFlags] enum.
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</constant>
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<constant name= "EMISSION_SHAPE_POINT" value= "0" enum= "EmissionShape" >
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All particles will be emitted from a single point.
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</constant>
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<constant name= "EMISSION_SHAPE_SPHERE" value= "1" enum= "EmissionShape" >
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Particles will be emitted in the volume of a sphere.
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</constant>
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<constant name= "EMISSION_SHAPE_BOX" value= "2" enum= "EmissionShape" >
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Particles will be emitted in the volume of a box.
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</constant>
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<constant name= "EMISSION_SHAPE_POINTS" value= "3" enum= "EmissionShape" >
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Particles will be emitted at a position determined by sampling a random point on the [member emission_point_texture]. Particle color will be modulated by [member emission_color_texture].
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</constant>
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<constant name= "EMISSION_SHAPE_DIRECTED_POINTS" value= "4" enum= "EmissionShape" >
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Particles will be emitted at a position determined by sampling a random point on the [member emission_point_texture]. Particle velocity and rotation will be set based on [member emission_normal_texture]. Particle color will be modulated by [member emission_color_texture].
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</constant>
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<constant name= "EMISSION_SHAPE_MAX" value= "5" enum= "EmissionShape" >
Represents the size of the [enum EmissionShape] enum.
</constant>
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<constant name= "SUB_EMITTER_DISABLED" value= "0" enum= "SubEmitterMode" >
</constant>
<constant name= "SUB_EMITTER_CONSTANT" value= "1" enum= "SubEmitterMode" >
</constant>
<constant name= "SUB_EMITTER_AT_END" value= "2" enum= "SubEmitterMode" >
</constant>
<constant name= "SUB_EMITTER_AT_COLLISION" value= "3" enum= "SubEmitterMode" >
</constant>
<constant name= "SUB_EMITTER_MAX" value= "4" enum= "SubEmitterMode" >
</constant>
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</constants>
</class>
