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virtualx-engine/doc/classes/ParticlesMaterial.xml
Hugo Locurcio b087538119
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.
2022-03-16 23:01:02 +01:00

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<?xml version="1.0" encoding="UTF-8" ?>
<class name="ParticlesMaterial" inherits="Material" version="3.5" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
<brief_description>
Particle properties for [Particles] and [Particles2D] nodes.
</brief_description>
<description>
ParticlesMaterial defines particle properties and behavior. It is used in the [code]process_material[/code] of [Particles] and [Particles2D] emitter nodes.
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.
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.
</description>
<tutorials>
</tutorials>
<methods>
<method name="get_flag" qualifiers="const">
<return type="bool" />
<argument index="0" name="flag" type="int" enum="ParticlesMaterial.Flags" />
<description>
Returns [code]true[/code] if the specified flag is enabled.
</description>
</method>
<method name="get_param" qualifiers="const">
<return type="float" />
<argument index="0" name="param" type="int" enum="ParticlesMaterial.Parameter" />
<description>
Returns the value of the specified parameter.
</description>
</method>
<method name="get_param_randomness" qualifiers="const">
<return type="float" />
<argument index="0" name="param" type="int" enum="ParticlesMaterial.Parameter" />
<description>
Returns the randomness ratio associated with the specified parameter.
</description>
</method>
<method name="get_param_texture" qualifiers="const">
<return type="Texture" />
<argument index="0" name="param" type="int" enum="ParticlesMaterial.Parameter" />
<description>
Returns the [Texture] used by the specified parameter.
</description>
</method>
<method name="set_flag">
<return type="void" />
<argument index="0" name="flag" type="int" enum="ParticlesMaterial.Flags" />
<argument index="1" name="enable" type="bool" />
<description>
If [code]true[/code], enables the specified flag. See [enum Flags] for options.
</description>
</method>
<method name="set_param">
<return type="void" />
<argument index="0" name="param" type="int" enum="ParticlesMaterial.Parameter" />
<argument index="1" name="value" type="float" />
<description>
Sets the specified [enum Parameter].
</description>
</method>
<method name="set_param_randomness">
<return type="void" />
<argument index="0" name="param" type="int" enum="ParticlesMaterial.Parameter" />
<argument index="1" name="randomness" type="float" />
<description>
Sets the randomness ratio for the specified [enum Parameter].
</description>
</method>
<method name="set_param_texture">
<return type="void" />
<argument index="0" name="param" type="int" enum="ParticlesMaterial.Parameter" />
<argument index="1" name="texture" type="Texture" />
<description>
Sets the [Texture] for the specified [enum Parameter].
</description>
</method>
</methods>
<members>
<member name="angle" type="float" setter="set_param" getter="get_param" default="0.0">
Initial rotation applied to each particle, in degrees.
[b]Note:[/b] Only applied when [member flag_disable_z] or [member flag_rotate_y] are [code]true[/code] or the [SpatialMaterial] being used to draw the particle is using [constant SpatialMaterial.BILLBOARD_PARTICLES].
</member>
<member name="angle_curve" type="Texture" setter="set_param_texture" getter="get_param_texture">
Each particle's rotation will be animated along this [CurveTexture].
</member>
<member name="angle_random" type="float" setter="set_param_randomness" getter="get_param_randomness" default="0.0">
Rotation randomness ratio.
</member>
<member name="angular_velocity" type="float" setter="set_param" getter="get_param" default="0.0">
Initial angular velocity applied to each particle in [i]degrees[/i] per second. Sets the speed of rotation of the particle.
[b]Note:[/b] Only applied when [member flag_disable_z] or [member flag_rotate_y] are [code]true[/code] or the [SpatialMaterial] being used to draw the particle is using [constant SpatialMaterial.BILLBOARD_PARTICLES].
</member>
<member name="angular_velocity_curve" type="Texture" setter="set_param_texture" getter="get_param_texture">
Each particle's angular velocity will vary along this [CurveTexture].
</member>
<member name="angular_velocity_random" type="float" setter="set_param_randomness" getter="get_param_randomness" default="0.0">
Angular velocity randomness ratio.
</member>
<member name="anim_offset" type="float" setter="set_param" getter="get_param" default="0.0">
Particle animation offset.
</member>
<member name="anim_offset_curve" type="Texture" setter="set_param_texture" getter="get_param_texture">
Each particle's animation offset will vary along this [CurveTexture].
</member>
<member name="anim_offset_random" type="float" setter="set_param_randomness" getter="get_param_randomness" default="0.0">
Animation offset randomness ratio.
</member>
<member name="anim_speed" type="float" setter="set_param" getter="get_param" default="0.0">
Particle animation speed.
</member>
<member name="anim_speed_curve" type="Texture" setter="set_param_texture" getter="get_param_texture">
Each particle's animation speed will vary along this [CurveTexture].
</member>
<member name="anim_speed_random" type="float" setter="set_param_randomness" getter="get_param_randomness" default="0.0">
Animation speed randomness ratio.
</member>
<member name="color" type="Color" setter="set_color" getter="get_color" default="Color( 1, 1, 1, 1 )">
Each particle's initial color. If the [Particles2D]'s [code]texture[/code] is defined, it will be multiplied by this color. To have particle display color in a [SpatialMaterial] make sure to set [member SpatialMaterial.vertex_color_use_as_albedo] to [code]true[/code].
</member>
<member name="color_initial_ramp" type="Texture" setter="set_color_initial_ramp" getter="get_color_initial_ramp">
Each particle's initial color will vary along this [GradientTexture] (multiplied with [member color]).
</member>
<member name="color_ramp" type="Texture" setter="set_color_ramp" getter="get_color_ramp">
Each particle's color will vary along this [GradientTexture] over its lifetime (multiplied with [member color]).
</member>
<member name="damping" type="float" setter="set_param" getter="get_param" default="0.0">
The rate at which particles lose velocity.
</member>
<member name="damping_curve" type="Texture" setter="set_param_texture" getter="get_param_texture">
Damping will vary along this [CurveTexture].
</member>
<member name="damping_random" type="float" setter="set_param_randomness" getter="get_param_randomness" default="0.0">
Damping randomness ratio.
</member>
<member name="direction" type="Vector3" setter="set_direction" getter="get_direction" default="Vector3( 1, 0, 0 )">
Unit vector specifying the particles' emission direction.
</member>
<member name="emission_box_extents" type="Vector3" setter="set_emission_box_extents" getter="get_emission_box_extents">
The box's extents if [code]emission_shape[/code] is set to [constant EMISSION_SHAPE_BOX].
</member>
<member name="emission_color_texture" type="Texture" setter="set_emission_color_texture" getter="get_emission_color_texture">
Particle color will be modulated by color determined by sampling this texture at the same point as the [member emission_point_texture].
</member>
<member name="emission_normal_texture" type="Texture" setter="set_emission_normal_texture" getter="get_emission_normal_texture">
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.
</member>
<member name="emission_point_count" type="int" setter="set_emission_point_count" getter="get_emission_point_count">
The number of emission points if [code]emission_shape[/code] is set to [constant EMISSION_SHAPE_POINTS] or [constant EMISSION_SHAPE_DIRECTED_POINTS].
</member>
<member name="emission_point_texture" type="Texture" setter="set_emission_point_texture" getter="get_emission_point_texture">
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.
</member>
<member name="emission_ring_axis" type="Vector3" setter="set_emission_ring_axis" getter="get_emission_ring_axis">
The axis of the ring when using the emitter [constant EMISSION_SHAPE_RING].
</member>
<member name="emission_ring_height" type="float" setter="set_emission_ring_height" getter="get_emission_ring_height">
The height of the ring when using the emitter [constant EMISSION_SHAPE_RING].
</member>
<member name="emission_ring_inner_radius" type="float" setter="set_emission_ring_inner_radius" getter="get_emission_ring_inner_radius">
The inner radius of the ring when using the emitter [constant EMISSION_SHAPE_RING].
</member>
<member name="emission_ring_radius" type="float" setter="set_emission_ring_radius" getter="get_emission_ring_radius">
The radius of the ring when using the emitter [constant EMISSION_SHAPE_RING].
</member>
<member name="emission_shape" type="int" setter="set_emission_shape" getter="get_emission_shape" enum="ParticlesMaterial.EmissionShape" default="0">
Particles will be emitted inside this region. Use [enum EmissionShape] constants for values.
</member>
<member name="emission_sphere_radius" type="float" setter="set_emission_sphere_radius" getter="get_emission_sphere_radius">
The sphere's radius if [code]emission_shape[/code] is set to [constant EMISSION_SHAPE_SPHERE].
</member>
<member name="flag_align_y" type="bool" setter="set_flag" getter="get_flag" default="false">
Align Y axis of particle with the direction of its velocity.
</member>
<member name="flag_disable_z" type="bool" setter="set_flag" getter="get_flag" default="false">
If [code]true[/code], particles will not move on the z axis.
</member>
<member name="flag_rotate_y" type="bool" setter="set_flag" getter="get_flag" default="false">
If [code]true[/code], particles rotate around Y axis by [member angle].
</member>
<member name="flatness" type="float" setter="set_flatness" getter="get_flatness" default="0.0">
Amount of [member spread] along the Y axis.
</member>
<member name="gravity" type="Vector3" setter="set_gravity" getter="get_gravity" default="Vector3( 0, -9.8, 0 )">
Gravity applied to every particle.
</member>
<member name="hue_variation" type="float" setter="set_param" getter="get_param" default="0.0">
Initial hue variation applied to each particle.
</member>
<member name="hue_variation_curve" type="Texture" setter="set_param_texture" getter="get_param_texture">
Each particle's hue will vary along this [CurveTexture].
</member>
<member name="hue_variation_random" type="float" setter="set_param_randomness" getter="get_param_randomness" default="0.0">
Hue variation randomness ratio.
</member>
<member name="initial_velocity" type="float" setter="set_param" getter="get_param" default="0.0">
Initial velocity magnitude for each particle. Direction comes from [member spread] and the node's orientation.
</member>
<member name="initial_velocity_random" type="float" setter="set_param_randomness" getter="get_param_randomness" default="0.0">
Initial velocity randomness ratio.
</member>
<member name="lifetime_randomness" type="float" setter="set_lifetime_randomness" getter="get_lifetime_randomness" default="0.0">
Particle lifetime randomness ratio.
</member>
<member name="linear_accel" type="float" setter="set_param" getter="get_param" default="0.0">
Linear acceleration applied to each particle in the direction of motion.
</member>
<member name="linear_accel_curve" type="Texture" setter="set_param_texture" getter="get_param_texture">
Each particle's linear acceleration will vary along this [CurveTexture].
</member>
<member name="linear_accel_random" type="float" setter="set_param_randomness" getter="get_param_randomness" default="0.0">
Linear acceleration randomness ratio.
</member>
<member name="orbit_velocity" type="float" setter="set_param" getter="get_param">
Orbital velocity applied to each particle. Makes the particles circle around origin. Specified in number of full rotations around origin per second.
[b]Note:[/b] Only available when [member flag_disable_z] is [code]true[/code].
</member>
<member name="orbit_velocity_curve" type="Texture" setter="set_param_texture" getter="get_param_texture">
Each particle's orbital velocity will vary along this [CurveTexture].
</member>
<member name="orbit_velocity_random" type="float" setter="set_param_randomness" getter="get_param_randomness">
Orbital velocity randomness ratio.
</member>
<member name="radial_accel" type="float" setter="set_param" getter="get_param" default="0.0">
Radial acceleration applied to each particle. Makes particle accelerate away from origin.
</member>
<member name="radial_accel_curve" type="Texture" setter="set_param_texture" getter="get_param_texture">
Each particle's radial acceleration will vary along this [CurveTexture].
</member>
<member name="radial_accel_random" type="float" setter="set_param_randomness" getter="get_param_randomness" default="0.0">
Radial acceleration randomness ratio.
</member>
<member name="scale" type="float" setter="set_param" getter="get_param" default="1.0">
Initial scale applied to each particle.
</member>
<member name="scale_curve" type="Texture" setter="set_param_texture" getter="get_param_texture">
Each particle's scale will vary along this [CurveTexture].
</member>
<member name="scale_random" type="float" setter="set_param_randomness" getter="get_param_randomness" default="0.0">
Scale randomness ratio.
</member>
<member name="spread" type="float" setter="set_spread" getter="get_spread" default="45.0">
Each particle's initial direction range from [code]+spread[/code] to [code]-spread[/code] degrees.
</member>
<member name="tangential_accel" type="float" setter="set_param" getter="get_param" default="0.0">
Tangential acceleration applied to each particle. Tangential acceleration is perpendicular to the particle's velocity giving the particles a swirling motion.
</member>
<member name="tangential_accel_curve" type="Texture" setter="set_param_texture" getter="get_param_texture">
Each particle's tangential acceleration will vary along this [CurveTexture].
</member>
<member name="tangential_accel_random" type="float" setter="set_param_randomness" getter="get_param_randomness" default="0.0">
Tangential acceleration randomness ratio.
</member>
<member name="trail_color_modifier" type="GradientTexture" setter="set_trail_color_modifier" getter="get_trail_color_modifier">
Trail particles' color will vary along this [GradientTexture].
</member>
<member name="trail_divisor" type="int" setter="set_trail_divisor" getter="get_trail_divisor" default="1">
Emitter will emit [code]amount[/code] divided by [code]trail_divisor[/code] particles. The remaining particles will be used as trail(s).
</member>
<member name="trail_size_modifier" type="CurveTexture" setter="set_trail_size_modifier" getter="get_trail_size_modifier">
Trail particles' size will vary along this [CurveTexture].
</member>
</members>
<constants>
<constant name="PARAM_INITIAL_LINEAR_VELOCITY" value="0" enum="Parameter">
Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set initial velocity properties.
</constant>
<constant name="PARAM_ANGULAR_VELOCITY" value="1" enum="Parameter">
Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set angular velocity properties.
</constant>
<constant name="PARAM_ORBIT_VELOCITY" value="2" enum="Parameter">
Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set orbital velocity properties.
</constant>
<constant name="PARAM_LINEAR_ACCEL" value="3" enum="Parameter">
Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set linear acceleration properties.
</constant>
<constant name="PARAM_RADIAL_ACCEL" value="4" enum="Parameter">
Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set radial acceleration properties.
</constant>
<constant name="PARAM_TANGENTIAL_ACCEL" value="5" enum="Parameter">
Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set tangential acceleration properties.
</constant>
<constant name="PARAM_DAMPING" value="6" enum="Parameter">
Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set damping properties.
</constant>
<constant name="PARAM_ANGLE" value="7" enum="Parameter">
Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set angle properties.
</constant>
<constant name="PARAM_SCALE" value="8" enum="Parameter">
Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set scale properties.
</constant>
<constant name="PARAM_HUE_VARIATION" value="9" enum="Parameter">
Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set hue variation properties.
</constant>
<constant name="PARAM_ANIM_SPEED" value="10" enum="Parameter">
Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set animation speed properties.
</constant>
<constant name="PARAM_ANIM_OFFSET" value="11" enum="Parameter">
Use with [method set_param], [method set_param_randomness], and [method set_param_texture] to set animation offset properties.
</constant>
<constant name="PARAM_MAX" value="12" enum="Parameter">
Represents the size of the [enum Parameter] enum.
</constant>
<constant name="FLAG_ALIGN_Y_TO_VELOCITY" value="0" enum="Flags">
Use with [method set_flag] to set [member flag_align_y].
</constant>
<constant name="FLAG_ROTATE_Y" value="1" enum="Flags">
Use with [method set_flag] to set [member flag_rotate_y].
</constant>
<constant name="FLAG_DISABLE_Z" value="2" enum="Flags">
Use with [method set_flag] to set [member flag_disable_z].
</constant>
<constant name="FLAG_MAX" value="3" enum="Flags">
Represents the size of the [enum Flags] enum.
</constant>
<constant name="EMISSION_SHAPE_POINT" value="0" enum="EmissionShape">
All particles will be emitted from a single point.
</constant>
<constant name="EMISSION_SHAPE_SPHERE" value="1" enum="EmissionShape">
Particles will be emitted in the volume of a sphere.
</constant>
<constant name="EMISSION_SHAPE_BOX" value="2" enum="EmissionShape">
Particles will be emitted in the volume of a box.
</constant>
<constant name="EMISSION_SHAPE_POINTS" value="3" enum="EmissionShape">
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].
</constant>
<constant name="EMISSION_SHAPE_DIRECTED_POINTS" value="4" enum="EmissionShape">
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].
</constant>
<constant name="EMISSION_SHAPE_RING" value="5" enum="EmissionShape">
Particles will be emitted in a ring or cylinder.
</constant>
<constant name="EMISSION_SHAPE_MAX" value="6" enum="EmissionShape">
Represents the size of the [enum EmissionShape] enum.
</constant>
</constants>
</class>
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