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<?xml version="1.0" encoding="UTF-8" ?>
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<class name= "CPUParticles2D" inherits= "Node2D" version= "3.5" >
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<brief_description >
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CPU-based 2D particle emitter.
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</brief_description>
<description >
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CPU-based 2D particle node used to create a variety of particle systems and effects.
See also [Particles2D], which provides the same functionality with hardware acceleration, but may not run on older devices.
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[b]Note:[/b] Unlike [Particles2D], the visibility rect is generated on-the-fly and doesn't need to be configured by the user.
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</description>
<tutorials >
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<link > $DOCS_URL/tutorials/2d/particle_systems_2d.html</link>
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</tutorials>
<methods >
<method name= "convert_from_particles" >
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<return type= "void" />
<argument index= "0" name= "particles" type= "Node" />
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<description >
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Sets this node's properties to match a given [Particles2D] node with an assigned [ParticlesMaterial].
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</description>
</method>
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<method name= "get_param" qualifiers= "const" >
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<return type= "float" />
<argument index= "0" name= "param" type= "int" enum= "CPUParticles2D.Parameter" />
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<description >
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Returns the base value of the parameter specified by [enum Parameter].
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</description>
</method>
<method name= "get_param_curve" qualifiers= "const" >
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<return type= "Curve" />
<argument index= "0" name= "param" type= "int" enum= "CPUParticles2D.Parameter" />
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<description >
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Returns the [Curve] of the parameter specified by [enum Parameter].
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</description>
</method>
<method name= "get_param_randomness" qualifiers= "const" >
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<return type= "float" />
<argument index= "0" name= "param" type= "int" enum= "CPUParticles2D.Parameter" />
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<description >
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Returns the randomness factor of the parameter specified by [enum Parameter].
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</description>
</method>
<method name= "get_particle_flag" qualifiers= "const" >
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<return type= "bool" />
<argument index= "0" name= "flag" type= "int" enum= "CPUParticles2D.Flags" />
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<description >
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Returns the enabled state of the given flag (see [enum Flags] for options).
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</description>
</method>
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<method name= "restart" >
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<return type= "void" />
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<description >
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Restarts the particle emitter.
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</description>
</method>
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<method name= "set_param" >
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<return type= "void" />
<argument index= "0" name= "param" type= "int" enum= "CPUParticles2D.Parameter" />
<argument index= "1" name= "value" type= "float" />
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<description >
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Sets the base value of the parameter specified by [enum Parameter].
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</description>
</method>
<method name= "set_param_curve" >
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<return type= "void" />
<argument index= "0" name= "param" type= "int" enum= "CPUParticles2D.Parameter" />
<argument index= "1" name= "curve" type= "Curve" />
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<description >
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Sets the [Curve] of the parameter specified by [enum Parameter].
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</description>
</method>
<method name= "set_param_randomness" >
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<return type= "void" />
<argument index= "0" name= "param" type= "int" enum= "CPUParticles2D.Parameter" />
<argument index= "1" name= "randomness" type= "float" />
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<description >
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Sets the randomness factor of the parameter specified by [enum Parameter].
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</description>
</method>
<method name= "set_particle_flag" >
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<return type= "void" />
<argument index= "0" name= "flag" type= "int" enum= "CPUParticles2D.Flags" />
<argument index= "1" name= "enable" type= "bool" />
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<description >
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Enables or disables the given flag (see [enum Flags] for options).
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</description>
</method>
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</methods>
<members >
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<member name= "amount" type= "int" setter= "set_amount" getter= "get_amount" default= "8" >
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The number of particles emitted in one emission cycle (corresponding to the [member lifetime]).
[b]Note:[/b] Changing [member amount] will reset the particle emission, therefore removing all particles that were already emitted before changing [member amount].
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</member>
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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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</member>
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<member name= "angle_curve" type= "Curve" setter= "set_param_curve" getter= "get_param_curve" >
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Each particle's rotation will be animated along this [Curve].
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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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</member>
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<member name= "angular_velocity_curve" type= "Curve" setter= "set_param_curve" getter= "get_param_curve" >
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Each particle's angular velocity will vary along this [Curve].
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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= "Curve" setter= "set_param_curve" getter= "get_param_curve" >
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Each particle's animation offset will vary along this [Curve].
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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= "Curve" setter= "set_param_curve" getter= "get_param_curve" >
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Each particle's animation speed will vary along this [Curve].
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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= "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 [member texture] is defined, it will be multiplied by this color.
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</member>
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<member name= "color_ramp" type= "Gradient" setter= "set_color_ramp" getter= "get_color_ramp" >
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Each particle's color will vary along this [Gradient] (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= "Curve" setter= "set_param_curve" getter= "get_param_curve" >
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Damping will vary along this [Curve].
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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= "Vector2" setter= "set_direction" getter= "get_direction" default= "Vector2( 1, 0 )" >
Unit vector specifying the particles' emission direction.
</member>
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<member name= "draw_order" type= "int" setter= "set_draw_order" getter= "get_draw_order" enum= "CPUParticles2D.DrawOrder" default= "0" >
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Particle draw order. Uses [enum DrawOrder] values.
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</member>
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<member name= "emission_colors" type= "PoolColorArray" setter= "set_emission_colors" getter= "get_emission_colors" >
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Sets the [Color]s to modulate particles by when using [constant EMISSION_SHAPE_POINTS] or [constant EMISSION_SHAPE_DIRECTED_POINTS].
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</member>
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<member name= "emission_normals" type= "PoolVector2Array" setter= "set_emission_normals" getter= "get_emission_normals" >
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Sets the direction the particles will be emitted in when using [constant EMISSION_SHAPE_DIRECTED_POINTS].
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</member>
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<member name= "emission_points" type= "PoolVector2Array" setter= "set_emission_points" getter= "get_emission_points" >
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Sets the initial positions to spawn particles when using [constant EMISSION_SHAPE_POINTS] or [constant EMISSION_SHAPE_DIRECTED_POINTS].
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</member>
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<member name= "emission_rect_extents" type= "Vector2" setter= "set_emission_rect_extents" getter= "get_emission_rect_extents" >
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The rectangle's extents if [member emission_shape] is set to [constant EMISSION_SHAPE_RECTANGLE].
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</member>
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<member name= "emission_shape" type= "int" setter= "set_emission_shape" getter= "get_emission_shape" enum= "CPUParticles2D.EmissionShape" default= "0" >
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Particles will be emitted inside this region. See [enum EmissionShape] for possible 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 [member emission_shape] is set to [constant EMISSION_SHAPE_SPHERE].
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</member>
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<member name= "emitting" type= "bool" setter= "set_emitting" getter= "is_emitting" default= "true" >
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If [code]true[/code], particles are being emitted.
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</member>
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<member name= "explosiveness" type= "float" setter= "set_explosiveness_ratio" getter= "get_explosiveness_ratio" default= "0.0" >
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How rapidly particles in an emission cycle are emitted. If greater than [code]0[/code], there will be a gap in emissions before the next cycle begins.
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</member>
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<member name= "fixed_fps" type= "int" setter= "set_fixed_fps" getter= "get_fixed_fps" default= "0" >
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The particle system's frame rate is fixed to a value. For instance, changing the value to 2 will make the particles render at 2 frames per second. Note this does not slow down the simulation of the particle system itself.
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</member>
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<member name= "flag_align_y" type= "bool" setter= "set_particle_flag" getter= "get_particle_flag" default= "false" >
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Align Y axis of particle with the direction of its velocity.
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</member>
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<member name= "fract_delta" type= "bool" setter= "set_fractional_delta" getter= "get_fractional_delta" default= "true" >
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If [code]true[/code], results in fractional delta calculation which has a smoother particles display effect.
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</member>
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<member name= "gravity" type= "Vector2" setter= "set_gravity" getter= "get_gravity" default= "Vector2( 0, 98 )" >
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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= "Curve" setter= "set_param_curve" getter= "get_param_curve" >
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Each particle's hue will vary along this [Curve].
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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" type= "float" setter= "set_lifetime" getter= "get_lifetime" default= "1.0" >
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The amount of time each particle will exist (in seconds).
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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= "Curve" setter= "set_param_curve" getter= "get_param_curve" >
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Each particle's linear acceleration will vary along this [Curve].
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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= "local_coords" type= "bool" setter= "set_use_local_coordinates" getter= "get_use_local_coordinates" default= "true" >
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If [code]true[/code], particles use the parent node's coordinate space. If [code]false[/code], they use global coordinates.
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</member>
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<member name= "normalmap" type= "Texture" setter= "set_normalmap" getter= "get_normalmap" >
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Normal map to be used for the [member texture] property.
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[b]Note:[/b] Godot expects the normal map to use X+, Y-, and Z+ coordinates. See [url=http://wiki.polycount.com/wiki/Normal_Map_Technical_Details#Common_Swizzle_Coordinates]this page[/url] for a comparison of normal map coordinates expected by popular engines.
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</member>
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<member name= "one_shot" type= "bool" setter= "set_one_shot" getter= "get_one_shot" default= "false" >
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If [code]true[/code], only one emission cycle occurs. If set [code]true[/code] during a cycle, emission will stop at the cycle's end.
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</member>
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<member name= "orbit_velocity" type= "float" setter= "set_param" getter= "get_param" default= "0.0" >
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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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</member>
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<member name= "orbit_velocity_curve" type= "Curve" setter= "set_param_curve" getter= "get_param_curve" >
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Each particle's orbital velocity will vary along this [Curve].
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</member>
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<member name= "orbit_velocity_random" type= "float" setter= "set_param_randomness" getter= "get_param_randomness" default= "0.0" >
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Orbital velocity randomness ratio.
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</member>
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<member name= "preprocess" type= "float" setter= "set_pre_process_time" getter= "get_pre_process_time" default= "0.0" >
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Particle system starts as if it had already run for this many seconds.
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</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= "Curve" setter= "set_param_curve" getter= "get_param_curve" >
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Each particle's radial acceleration will vary along this [Curve].
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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= "randomness" type= "float" setter= "set_randomness_ratio" getter= "get_randomness_ratio" default= "0.0" >
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Emission lifetime randomness ratio.
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</member>
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<member name= "scale_amount" 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_amount_curve" type= "Curve" setter= "set_param_curve" getter= "get_param_curve" >
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Each particle's scale will vary along this [Curve].
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</member>
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<member name= "scale_amount_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= "speed_scale" type= "float" setter= "set_speed_scale" getter= "get_speed_scale" default= "1.0" >
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Particle system's running speed scaling ratio. A value of [code]0[/code] can be used to pause the particles.
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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= "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= "Curve" setter= "set_param_curve" getter= "get_param_curve" >
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Each particle's tangential acceleration will vary along this [Curve].
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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>
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<member name= "texture" type= "Texture" setter= "set_texture" getter= "get_texture" >
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Particle texture. If [code]null[/code], particles will be squares.
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</member>
</members>
<constants >
<constant name= "DRAW_ORDER_INDEX" value= "0" enum= "DrawOrder" >
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Particles are drawn in the order emitted.
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</constant>
<constant name= "DRAW_ORDER_LIFETIME" value= "1" enum= "DrawOrder" >
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Particles are drawn in order of remaining lifetime.
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</constant>
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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_curve] to set initial velocity properties.
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</constant>
<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_curve] to set angular velocity properties.
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</constant>
<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_curve] to set orbital velocity properties.
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</constant>
<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_curve] to set linear acceleration properties.
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</constant>
<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_curve] to set radial acceleration properties.
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</constant>
<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_curve] to set tangential acceleration properties.
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</constant>
<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_curve] to set damping properties.
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</constant>
<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_curve] to set angle properties.
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</constant>
<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_curve] to set scale properties.
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</constant>
<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_curve] to set hue variation properties.
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</constant>
<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_curve] to set animation speed properties.
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</constant>
<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_curve] to set animation offset properties.
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</constant>
<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>
<constant name= "FLAG_ALIGN_Y_TO_VELOCITY" value= "0" enum= "Flags" >
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Use with [method set_particle_flag] to set [member flag_align_y].
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</constant>
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<constant name= "FLAG_ROTATE_Y" value= "1" enum= "Flags" >
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Present for consistency with 3D particle nodes, not used in 2D.
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</constant>
<constant name= "FLAG_DISABLE_Z" value= "2" enum= "Flags" >
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Present for consistency with 3D particle nodes, not used in 2D.
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</constant>
<constant name= "FLAG_MAX" value= "3" enum= "Flags" >
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Represents the size of the [enum Flags] enum.
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</constant>
<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 on the surface of a sphere flattened to two dimensions.
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</constant>
<constant name= "EMISSION_SHAPE_RECTANGLE" value= "2" enum= "EmissionShape" >
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Particles will be emitted in the area of a rectangle.
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</constant>
<constant name= "EMISSION_SHAPE_POINTS" value= "3" enum= "EmissionShape" >
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Particles will be emitted at a position chosen randomly among [member emission_points]. Particle color will be modulated by [member emission_colors].
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</constant>
<constant name= "EMISSION_SHAPE_DIRECTED_POINTS" value= "4" enum= "EmissionShape" >
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Particles will be emitted at a position chosen randomly among [member emission_points]. Particle velocity and rotation will be set based on [member emission_normals]. Particle color will be modulated by [member emission_colors].
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</constant>
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<constant name= "EMISSION_SHAPE_MAX" value= "5" enum= "EmissionShape" >
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Represents the size of the [enum EmissionShape] enum.
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</constant>
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</constants>
</class>