ParticlesMaterial

ParticlesMaterial

Inherits: Material < Resource < Reference < Object

Category: Core

Brief Description

Particle properties for Particles and Particles2D nodes.

Properties

float	angle
Texture	angle_curve
float	angle_random
float	angular_velocity
Texture	angular_velocity_curve
float	angular_velocity_random
float	anim_offset
Texture	anim_offset_curve
float	anim_offset_random
float	anim_speed
Texture	anim_speed_curve
float	anim_speed_random
Color	color
Texture	color_ramp
float	damping
Texture	damping_curve
float	damping_random
Vector3	emission_box_extents
Texture	emission_color_texture
Texture	emission_normal_texture
int	emission_point_count
Texture	emission_point_texture
EmissionShape	emission_shape
float	emission_sphere_radius
bool	flag_align_y
bool	flag_disable_z
bool	flag_rotate_y
float	flatness
Vector3	gravity
float	hue_variation
Texture	hue_variation_curve
float	hue_variation_random
float	initial_velocity
float	initial_velocity_random
float	linear_accel
Texture	linear_accel_curve
float	linear_accel_random
float	orbit_velocity
Texture	orbit_velocity_curve
float	orbit_velocity_random
float	radial_accel
Texture	radial_accel_curve
float	radial_accel_random
float	scale
Texture	scale_curve
float	scale_random
float	spread
float	tangential_accel
Texture	tangential_accel_curve
float	tangential_accel_random
GradientTexture	trail_color_modifier
int	trail_divisor
CurveTexture	trail_size_modifier

Enumerations

enum Parameter:

PARAM_INITIAL_LINEAR_VELOCITY = 0 — Use with set_param, set_param_randomness, and set_param_texture to set initial velocity properties.
PARAM_ANGULAR_VELOCITY = 1 — Use with set_param, set_param_randomness, and set_param_texture to set angular velocity properties.
PARAM_ORBIT_VELOCITY = 2 — Use with set_param, set_param_randomness, and set_param_texture to set orbital velocity properties.
PARAM_LINEAR_ACCEL = 3 — Use with set_param, set_param_randomness, and set_param_texture to set linear acceleration properties.
PARAM_RADIAL_ACCEL = 4 — Use with set_param, set_param_randomness, and set_param_texture to set radial acceleration properties.
PARAM_TANGENTIAL_ACCEL = 5 — Use with set_param, set_param_randomness, and set_param_texture to set tangential acceleration properties.
PARAM_DAMPING = 6 — Use with set_param, set_param_randomness, and set_param_texture to set damping properties.
PARAM_ANGLE = 7 — Use with set_param, set_param_randomness, and set_param_texture to set angle properties.
PARAM_SCALE = 8 — Use with set_param, set_param_randomness, and set_param_texture to set scale properties.
PARAM_HUE_VARIATION = 9 — Use with set_param, set_param_randomness, and set_param_texture to set hue variation properties.
PARAM_ANIM_SPEED = 10 — Use with set_param, set_param_randomness, and set_param_texture to set animation speed properties.
PARAM_ANIM_OFFSET = 11 — Use with set_param, set_param_randomness, and set_param_texture to set animation offset properties.
PARAM_MAX = 12 — Represents the size of the Parameter enum.

enum Flags:

FLAG_ALIGN_Y_TO_VELOCITY = 0 — Use with set_flag to set flag_align_y.
FLAG_ROTATE_Y = 1 — Use with set_flag to set flag_rotate_y.
FLAG_DISABLE_Z = 2 — Use with set_flag to set flag_disable_z.
FLAG_MAX = 3 — Represents the size of the Flags enum.

enum EmissionShape:

EMISSION_SHAPE_POINT = 0 — All particles will be emitted from a single point.
EMISSION_SHAPE_SPHERE = 1 — Particles will be emitted in the volume of a sphere.
EMISSION_SHAPE_BOX = 2 — Particles will be emitted in the volume of a box.
EMISSION_SHAPE_POINTS = 3 — Particles will be emitted at a position determined by sampling a random point on the emission_point_texture. Particle color will be modulated by emission_color_texture.
EMISSION_SHAPE_DIRECTED_POINTS = 4 — Particles will be emitted at a position determined by sampling a random point on the emission_point_texture. Particle velocity and rotation will be set based on emission_normal_texture. Particle color will be modulated by emission_color_texture.

Description

ParticlesMaterial defines particle properties and behavior. It is used in the process_material 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 1.0 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 0.4 would scale the original property between 0.4-1.0 of its original value.

Property Descriptions

float angle

Setter	set_param(value)
Getter	get_param()

Initial rotation applied to each particle, in degrees.

Only applied when flag_disable_z or flag_rotate_y are true or the SpatialMaterial being used to draw the particle is using BillboardMode.BILLBOARD_PARTICLES.

Texture angle_curve

Setter	set_param_texture(value)
Getter	get_param_texture()

Each particle’s rotation will be animated along this CurveTexture.

float angle_random

Setter	set_param_randomness(value)
Getter	get_param_randomness()

Rotation randomness ratio. Default value: 0.

float angular_velocity

Setter	set_param(value)
Getter	get_param()

Initial angular velocity applied to each particle. Sets the speed of rotation of the particle.

Only applied when flag_disable_z or flag_rotate_y are true or the SpatialMaterial being used to draw the particle is using BillboardMode.BILLBOARD_PARTICLES.

Texture angular_velocity_curve

Setter	set_param_texture(value)
Getter	get_param_texture()

Each particle’s angular velocity will vary along this CurveTexture.

float angular_velocity_random

Setter	set_param_randomness(value)
Getter	get_param_randomness()

Angular velocity randomness ratio. Default value: 0.

float anim_offset

Setter	set_param(value)
Getter	get_param()

Particle animation offset.

Texture anim_offset_curve

Setter	set_param_texture(value)
Getter	get_param_texture()

Each particle’s animation offset will vary along this CurveTexture.

float anim_offset_random

Setter	set_param_randomness(value)
Getter	get_param_randomness()

Animation offset randomness ratio. Default value: 0.

float anim_speed

Setter	set_param(value)
Getter	get_param()

Particle animation speed.

Texture anim_speed_curve

Setter	set_param_texture(value)
Getter	get_param_texture()

Each particle’s animation speed will vary along this CurveTexture.

float anim_speed_random

Setter	set_param_randomness(value)
Getter	get_param_randomness()

Animation speed randomness ratio. Default value: 0.

Color color

Setter	set_color(value)
Getter	get_color()

Each particle’s initial color. If the Particles2D’s texture is defined, it will be multiplied by this color. To have particle display color in a SpatialMaterial make sure to set SpatialMaterial.vertex_color_use_as_albedo to true.

Texture color_ramp

Setter	set_color_ramp(value)
Getter	get_color_ramp()

Each particle’s color will vary along this GradientTexture.

float damping

Setter	set_param(value)
Getter	get_param()

The rate at which particles lose velocity.

Texture damping_curve

Setter	set_param_texture(value)
Getter	get_param_texture()

Damping will vary along this CurveTexture.

float damping_random

Setter	set_param_randomness(value)
Getter	get_param_randomness()

Damping randomness ratio. Default value: 0.

Vector3 emission_box_extents

Setter	set_emission_box_extents(value)
Getter	get_emission_box_extents()

The box’s extents if emission_shape is set to EMISSION_SHAPE_BOX.

Texture emission_color_texture

Setter	set_emission_color_texture(value)
Getter	get_emission_color_texture()

Particle color will be modulated by color determined by sampling this texture at the same point as the emission_point_texture.

Texture emission_normal_texture

Setter	set_emission_normal_texture(value)
Getter	get_emission_normal_texture()

Particle velocity and rotation will be set by sampling this texture at the same point as the emission_point_texture. Used only in 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.

int emission_point_count

Setter	set_emission_point_count(value)
Getter	get_emission_point_count()

The number of emission points if emission_shape is set to EMISSION_SHAPE_POINTS or EMISSION_SHAPE_DIRECTED_POINTS.

Texture emission_point_texture

Setter	set_emission_point_texture(value)
Getter	get_emission_point_texture()

Particles will be emitted at positions determined by sampling this texture at a random position. Used with EMISSION_SHAPE_POINTS and 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.

EmissionShape emission_shape

Setter	set_emission_shape(value)
Getter	get_emission_shape()

Particles will be emitted inside this region. Use EMISSION_SHAPE_* constants for values. Default value: EMISSION_SHAPE_POINT.

float emission_sphere_radius

Setter	set_emission_sphere_radius(value)
Getter	get_emission_sphere_radius()

The sphere’s radius if emission_shape is set to EMISSION_SHAPE_SPHERE.

bool flag_align_y

Setter	set_flag(value)
Getter	get_flag()

Align y-axis of particle with the direction of its velocity.

bool flag_disable_z

Setter	set_flag(value)
Getter	get_flag()

If true, particles will not move on the z axis. Default value: true for Particles2D, false for Particles.

bool flag_rotate_y

Setter	set_flag(value)
Getter	get_flag()

If true, particles rotate around y-axis by angle.

float flatness

Setter	set_flatness(value)
Getter	get_flatness()

Amount of spread in Y/Z plane. A value of 1 restricts particles to X/Z plane. Default 0.

Vector3 gravity

Setter	set_gravity(value)
Getter	get_gravity()

Gravity applied to every particle. Default value: (0, -9.8, 0).

float hue_variation

Setter	set_param(value)
Getter	get_param()

Initial hue variation applied to each particle.

Texture hue_variation_curve

Setter	set_param_texture(value)
Getter	get_param_texture()

Each particle’s hue will vary along this CurveTexture.

float hue_variation_random

Setter	set_param_randomness(value)
Getter	get_param_randomness()

Hue variation randomness ratio. Default value: 0.

float initial_velocity

Setter	set_param(value)
Getter	get_param()

Initial velocity magnitude for each particle. Direction comes from spread and the node’s orientation.

float initial_velocity_random

Setter	set_param_randomness(value)
Getter	get_param_randomness()

Initial velocity randomness ratio. Default value: 0.

float linear_accel

Setter	set_param(value)
Getter	get_param()

Linear acceleration applied to each particle in the direction of motion.

Texture linear_accel_curve

Setter	set_param_texture(value)
Getter	get_param_texture()

Each particle’s linear acceleration will vary along this CurveTexture.

float linear_accel_random

Setter	set_param_randomness(value)
Getter	get_param_randomness()

Linear acceleration randomness ratio. Default value: 0.

float orbit_velocity

Setter	set_param(value)
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.

Only available when flag_disable_z is true.

Texture orbit_velocity_curve

Setter	set_param_texture(value)
Getter	get_param_texture()

Each particle’s orbital velocity will vary along this CurveTexture.

float orbit_velocity_random

Setter	set_param_randomness(value)
Getter	get_param_randomness()

Orbital velocity randomness ratio. Default value: 0.

float radial_accel

Setter	set_param(value)
Getter	get_param()

Radial acceleration applied to each particle. Makes particle accelerate away from origin.

Texture radial_accel_curve

Setter	set_param_texture(value)
Getter	get_param_texture()

Each particle’s radial acceleration will vary along this CurveTexture.

float radial_accel_random

Setter	set_param_randomness(value)
Getter	get_param_randomness()

Radial acceleration randomness ratio. Default value: 0.

float scale

Setter	set_param(value)
Getter	get_param()

Initial scale applied to each particle.

Texture scale_curve

Setter	set_param_texture(value)
Getter	get_param_texture()

Each particle’s scale will vary along this CurveTexture.

float scale_random

Setter	set_param_randomness(value)
Getter	get_param_randomness()

Scale randomness ratio. Default value: 0.

float spread

Setter	set_spread(value)
Getter	get_spread()

Each particle’s initial direction range from +spread to -spread degrees. Default value: 45. Applied to X/Z plane and Y/Z planes.

float tangential_accel

Setter	set_param(value)
Getter	get_param()

Tangential acceleration applied to each particle. Tangential acceleration is perpendicular to the particle’s velocity giving the particles a swirling motion.

Texture tangential_accel_curve

Setter	set_param_texture(value)
Getter	get_param_texture()

Each particle’s tangential acceleration will vary along this CurveTexture.

float tangential_accel_random

Setter	set_param_randomness(value)
Getter	get_param_randomness()

Tangential acceleration randomness ratio. Default value: 0.

GradientTexture trail_color_modifier

Setter	set_trail_color_modifier(value)
Getter	get_trail_color_modifier()

Trail particles’ color will vary along this GradientTexture.

int trail_divisor

Setter	set_trail_divisor(value)
Getter	get_trail_divisor()

Emitter will emit amount divided by trail_divisor particles. The remaining particles will be used as trail(s).

CurveTexture trail_size_modifier

Setter	set_trail_size_modifier(value)
Getter	get_trail_size_modifier()

Trail particles’ size will vary along this CurveTexture.