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<?xml version="1.0" encoding="UTF-8" ?>
<class name="Particles" inherits="GeometryInstance" category="Core" version="3.2">
<brief_description>
3D particle emitter.
</brief_description>
<description>
3D particle node used to create a variety of particle systems and effects. [Particles] features an emitter that generates some number of particles at a given rate.
Use the [code]process_material[/code] property to add a [ParticlesMaterial] to configure particle appearance and behavior. Alternatively, you can add a [ShaderMaterial] which will be applied to all particles.
</description>
<tutorials>
<link>http://docs.godotengine.org/en/latest/tutorials/3d/vertex_animation/controlling_thousands_of_fish.html</link>
</tutorials>
<methods>
<method name="capture_aabb" qualifiers="const">
<return type="AABB">
</return>
<description>
Returns the bounding box that contains all the particles that are active in the current frame.
</description>
</method>
<method name="restart">
<return type="void">
</return>
<description>
Restarts the particle emission, clearing existing particles.
</description>
</method>
</methods>
<members>
<member name="amount" type="int" setter="set_amount" getter="get_amount">
Number of particles to emit.
</member>
<member name="draw_order" type="int" setter="set_draw_order" getter="get_draw_order" enum="Particles.DrawOrder">
Particle draw order. Uses [code]DRAW_ORDER_*[/code] values. Default value: [code]DRAW_ORDER_INDEX[/code].
</member>
<member name="draw_pass_1" type="Mesh" setter="set_draw_pass_mesh" getter="get_draw_pass_mesh">
[Mesh] that is drawn for the first draw pass.
</member>
<member name="draw_pass_2" type="Mesh" setter="set_draw_pass_mesh" getter="get_draw_pass_mesh">
[Mesh] that is drawn for the second draw pass.
</member>
<member name="draw_pass_3" type="Mesh" setter="set_draw_pass_mesh" getter="get_draw_pass_mesh">
[Mesh] that is drawn for the third draw pass.
</member>
<member name="draw_pass_4" type="Mesh" setter="set_draw_pass_mesh" getter="get_draw_pass_mesh">
[Mesh] that is drawn for the fourth draw pass.
</member>
<member name="draw_passes" type="int" setter="set_draw_passes" getter="get_draw_passes">
The number of draw passes when rendering particles.
</member>
<member name="emitting" type="bool" setter="set_emitting" getter="is_emitting">
If [code]true[/code], particles are being emitted. Default value: [code]true[/code].
</member>
<member name="explosiveness" type="float" setter="set_explosiveness_ratio" getter="get_explosiveness_ratio">
Time ratio between each emission. If [code]0[/code] particles are emitted continuously. If [code]1[/code] all particles are emitted simultaneously. Default value: [code]0[/code].
</member>
<member name="fixed_fps" type="int" setter="set_fixed_fps" getter="get_fixed_fps">
</member>
<member name="fract_delta" type="bool" setter="set_fractional_delta" getter="get_fractional_delta">
</member>
<member name="lifetime" type="float" setter="set_lifetime" getter="get_lifetime">
Amount of time each particle will exist. Default value: [code]1[/code].
</member>
<member name="local_coords" type="bool" setter="set_use_local_coordinates" getter="get_use_local_coordinates">
If [code]true[/code], particles use the parent node's coordinate space. If [code]false[/code], they use global coordinates. Default value: [code]true[/code].
</member>
<member name="one_shot" type="bool" setter="set_one_shot" getter="get_one_shot">
If [code]true[/code], only [code]amount[/code] particles will be emitted. Default value: [code]false[/code].
</member>
<member name="preprocess" type="float" setter="set_pre_process_time" getter="get_pre_process_time">
Amount of time to preprocess the particles before animation starts. Lets you start the animation some time after particles have started emitting.
</member>
<member name="process_material" type="Material" setter="set_process_material" getter="get_process_material">
[Material] for processing particles. Can be a [ParticlesMaterial] or a [ShaderMaterial].
</member>
<member name="randomness" type="float" setter="set_randomness_ratio" getter="get_randomness_ratio">
Emission randomness ratio. Default value: [code]0[/code].
</member>
<member name="speed_scale" type="float" setter="set_speed_scale" getter="get_speed_scale">
Speed scaling ratio. Default value: [code]1[/code]. A value of [code]0[/code] can be used to pause the particles.
</member>
<member name="visibility_aabb" type="AABB" setter="set_visibility_aabb" getter="get_visibility_aabb">
The [AABB] that determines the area of the world part of which needs to be visible on screen for the particle system to be active.
</member>
</members>
<constants>
<constant name="DRAW_ORDER_INDEX" value="0" enum="DrawOrder">
Particles are drawn in the order emitted.
</constant>
<constant name="DRAW_ORDER_LIFETIME" value="1" enum="DrawOrder">
Particles are drawn in order of remaining lifetime.
</constant>
<constant name="DRAW_ORDER_VIEW_DEPTH" value="2" enum="DrawOrder">
Particles are drawn in order of depth.
</constant>
<constant name="MAX_DRAW_PASSES" value="4">
Maximum number of draw passes supported.
</constant>
</constants>
</class>
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