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godot/doc/classes/GPUParticles3D.xml
Hugo Locurcio b68dd2e189
Add an XML schema for documentation 
This makes it easier to spot syntax errors when editing the
class reference. The schema is referenced locally so validation
can still work offline.

Each class XML's schema conformance is also checked on GitHub Actions.
2022-02-15 00:03:31 +01:00

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<?xml version="1.0" encoding="UTF-8" ?>
<class name="GPUParticles3D" inherits="GeometryInstance3D" version="4.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
<brief_description>
3D particle emitter.
</brief_description>
<description>
3D particle node used to create a variety of particle systems and effects. [GPUParticles3D] 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 title="Controlling thousands of fish with Particles">$DOCS_URL/tutorials/performance/vertex_animation/controlling_thousands_of_fish.html</link>
<link title="Third Person Shooter Demo">https://godotengine.org/asset-library/asset/678</link>
</tutorials>
<methods>
<method name="capture_aabb" qualifiers="const">
<return type="AABB" />
<description>
Returns the axis-aligned bounding box that contains all the particles that are active in the current frame.
</description>
</method>
<method name="emit_particle">
<return type="void" />
<argument index="0" name="xform" type="Transform3D" />
<argument index="1" name="velocity" type="Vector3" />
<argument index="2" name="color" type="Color" />
<argument index="3" name="custom" type="Color" />
<argument index="4" name="flags" type="int" />
<description>
Emits a single particle. Whether [code]xform[/code], [code]velocity[/code], [code]color[/code] and [code]custom[/code] are applied depends on the value of [code]flags[/code]. See [enum EmitFlags].
</description>
</method>
<method name="get_draw_pass_mesh" qualifiers="const">
<return type="Mesh" />
<argument index="0" name="pass" type="int" />
<description>
Returns the [Mesh] that is drawn at index [code]pass[/code].
</description>
</method>
<method name="restart">
<return type="void" />
<description>
Restarts the particle emission, clearing existing particles.
</description>
</method>
<method name="set_draw_pass_mesh">
<return type="void" />
<argument index="0" name="pass" type="int" />
<argument index="1" name="mesh" type="Mesh" />
<description>
Sets the [Mesh] that is drawn at index [code]pass[/code].
</description>
</method>
</methods>
<members>
<member name="amount" type="int" setter="set_amount" getter="get_amount" default="8">
Number of particles to emit.
</member>
<member name="collision_base_size" type="float" setter="set_collision_base_size" getter="get_collision_base_size" default="0.01">
</member>
<member name="draw_order" type="int" setter="set_draw_order" getter="get_draw_order" enum="GPUParticles3D.DrawOrder" default="0">
Particle draw order. Uses [enum DrawOrder] values.
</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" default="1">
The number of draw passes when rendering particles.
</member>
<member name="draw_skin" type="Skin" setter="set_skin" getter="get_skin">
</member>
<member name="emitting" type="bool" setter="set_emitting" getter="is_emitting" default="true">
If [code]true[/code], particles are being emitted.
</member>
<member name="explosiveness" type="float" setter="set_explosiveness_ratio" getter="get_explosiveness_ratio" default="0.0">
Time ratio between each emission. If [code]0[/code], particles are emitted continuously. If [code]1[/code], all particles are emitted simultaneously.
</member>
<member name="fixed_fps" type="int" setter="set_fixed_fps" getter="get_fixed_fps" default="30">
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.
</member>
<member name="fract_delta" type="bool" setter="set_fractional_delta" getter="get_fractional_delta" default="true">
If [code]true[/code], results in fractional delta calculation which has a smoother particles display effect.
</member>
<member name="interpolate" type="bool" setter="set_interpolate" getter="get_interpolate" default="true">
</member>
<member name="lifetime" type="float" setter="set_lifetime" getter="get_lifetime" default="1.0">
Amount of time each particle will exist.
</member>
<member name="local_coords" type="bool" setter="set_use_local_coordinates" getter="get_use_local_coordinates" default="true">
If [code]true[/code], particles use the parent node's coordinate space. If [code]false[/code], they use global coordinates.
</member>
<member name="one_shot" type="bool" setter="set_one_shot" getter="get_one_shot" default="false">
If [code]true[/code], only [code]amount[/code] particles will be emitted.
</member>
<member name="preprocess" type="float" setter="set_pre_process_time" getter="get_pre_process_time" default="0.0">
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" default="0.0">
Emission randomness ratio.
</member>
<member name="speed_scale" type="float" setter="set_speed_scale" getter="get_speed_scale" default="1.0">
Speed scaling ratio. A value of [code]0[/code] can be used to pause the particles.
</member>
<member name="sub_emitter" type="NodePath" setter="set_sub_emitter" getter="get_sub_emitter" default="NodePath(&quot;&quot;)">
</member>
<member name="trail_enabled" type="bool" setter="set_trail_enabled" getter="is_trail_enabled" default="false">
</member>
<member name="trail_length_secs" type="float" setter="set_trail_length" getter="get_trail_length" default="0.3">
</member>
<member name="transform_align" type="int" setter="set_transform_align" getter="get_transform_align" enum="GPUParticles3D.TransformAlign" default="0">
</member>
<member name="visibility_aabb" type="AABB" setter="set_visibility_aabb" getter="get_visibility_aabb" default="AABB(-4, -4, -4, 8, 8, 8)">
The [AABB] that determines the node's region which needs to be visible on screen for the particle system to be active.
Grow the box if particles suddenly appear/disappear when the node enters/exits the screen. The [AABB] can be grown via code or with the [b]Particles → Generate AABB[/b] editor tool.
</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_REVERSE_LIFETIME" value="2" enum="DrawOrder">
</constant>
<constant name="DRAW_ORDER_VIEW_DEPTH" value="3" enum="DrawOrder">
Particles are drawn in order of depth.
</constant>
<constant name="EMIT_FLAG_POSITION" value="1" enum="EmitFlags">
Particle starts at the specified position.
</constant>
<constant name="EMIT_FLAG_ROTATION_SCALE" value="2" enum="EmitFlags">
Particle starts with specified rotation and scale.
</constant>
<constant name="EMIT_FLAG_VELOCITY" value="4" enum="EmitFlags">
Particle starts with the specified velocity vector, which defines the emission direction and speed.
</constant>
<constant name="EMIT_FLAG_COLOR" value="8" enum="EmitFlags">
Particle starts with specified color.
</constant>
<constant name="EMIT_FLAG_CUSTOM" value="16" enum="EmitFlags">
Particle starts with specified [code]CUSTOM[/code] data.
</constant>
<constant name="MAX_DRAW_PASSES" value="4">
Maximum number of draw passes supported.
</constant>
<constant name="TRANSFORM_ALIGN_DISABLED" value="0" enum="TransformAlign">
</constant>
<constant name="TRANSFORM_ALIGN_Z_BILLBOARD" value="1" enum="TransformAlign">
</constant>
<constant name="TRANSFORM_ALIGN_Y_TO_VELOCITY" value="2" enum="TransformAlign">
</constant>
<constant name="TRANSFORM_ALIGN_Z_BILLBOARD_Y_TO_VELOCITY" value="3" enum="TransformAlign">
</constant>
</constants>
</class>
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