Unreal Engine 4.26 Documentation

Unreal Engine 4.27 Documentation

Unreal Engine 5.0 Documentation

Unreal Engine 5.1 Documentation

Unreal Engine 5.2 Documentation

Unreal Engine 5.3 Documentation

> Unreal Engine API Reference > Runtime > Engine > FParticleEmitterBuildInfo

Light Theme

Dark Theme

FParticleEmitterBuildInfo

Choose your operating system:

Windows

macOS

Linux

References

Module	Engine
Header	/Engine/Source/Runtime/Engine/Public/ParticleEmitterInstances.h
Include	#include "ParticleEmitterInstances.h"

Syntax

struct FParticleEmitterBuildInfo

Variables

	Name	Description
FComposableFloa...	AlphaScale	The alpha scale of a particle over time.
bool	bEnableCollision	Enable collision?
uint32: 1	bLocalVectorFieldIgnoreComponentTransform	If true, local vector fields ignore the component transform.
uint32: 1	bLocalVectorFieldTileX	Tile vector field in x axis?
uint32: 1	bLocalVectorFieldTileY	Tile vector field in y axis?
uint32: 1	bLocalVectorFieldTileZ	Tile vector field in z axis?
uint32: 1	bLocalVectorFieldUseFixDT	Use fix delta time in the simulation?
uint32: 1	bRemoveHMDRoll	Particle alignment overrides
uint8	CollisionMode
float	CollisionRadiusBias	Bias applied to the collision radius.
float	CollisionRadiusScale	Radius scale applied to friction.
float	CollisionRandomDistribution	Random distribution across the reflection spreading cone when colliding.
float	CollisionRandomSpread	Factor reflection spreading cone when colliding.
uint8	CollisionResponse	How particles respond to collision.
FComposableVect...	ColorScale	The color scale of a particle over time.
FVector	ConstantAcceleration	Constant acceleration to apply to particles.
FComposableFloa...	DragCoefficient	Drag coefficient.
FComposableFloa...	DragScale	Drag scale over life.
FRawDistributio...	DynamicAlpha	An additional alpha scale for allowing parameters to be used for ColorOverLife modules.
FRawDistributio...	DynamicAlphaScale	An additional alpha scale for allowing parameters to be used for ColorScaleOverLife modules.
FRawDistributio...	DynamicColor	An additional color scale for allowing parameters to be used for ColorOverLife modules.
FRawDistributio...	DynamicColorScale	An additional color scale for allowing parameters to be used for ColorScaleOverLife modules.
int32	EstimatedMaxActiveParticleCount	The estimated maximum number of particles for this emitter.
float	Friction	Friction.
float	GlobalVectorFieldScale	Global vector field scale.
float	GlobalVectorFieldTightness	Global vector field tightness.
UVectorField &#...	LocalVectorField	Local vector field.
float	LocalVectorFieldIntensity	Local vector field intensity.
FVector	LocalVectorFieldMaxInitialRotation	Maximum initial rotation applied to local vector fields.
FVector	LocalVectorFieldMinInitialRotation	Minimum initial rotation applied to local vector fields.
FVector	LocalVectorFieldRotationRate	Local vector field rotation rate.
float	LocalVectorFieldTightness	Tightness tweak for local vector fields.
FTransform	LocalVectorFieldTransform	Local vector field transform.
float	MaxFacingCameraBlendDistance
float	MaxLifetime	The maximum lifetime of any particle that will spawn.
float	MaxRotationRate	The maximum rotation rate of particles.
FVector2D	MaxSize	The maximum size of a particle.
FVector2D	MaxSizeScaleBySpeed	The maximum amount by which to scale a particle based on its speed.
float	MinFacingCameraBlendDistance
FComposableVect...	OrbitInitialRotation	The accumulated orbit initial rotation.
FComposableVect...	OrbitOffset	The accumulated orbit offset.
FComposableVect...	OrbitRotationRate	The accumulated orbit rotation rate.
FVector2D	PivotOffset	An offset in UV space for the positioning of a sprites verticies.
FVector	PointAttractorPosition	Location of a point source attractor.
float	PointAttractorRadius	Radius of the point source attractor.
FComposableFloa...	PointAttractorStrength	Strength of the point attractor.
UParticleModule...	RequiredModule	The required module.
FComposableFloa...	Resilience	Collision damping factor.
FComposableFloa...	ResilienceScaleOverLife	Collision damping factor scale over life.
int32	ScreenAlignment
FComposableVect...	SizeScale	How to scale a particle's size over time.
FVector2D	SizeScaleBySpeed	How much to scale a particle's size based on its speed.
UParticleModule...	SpawnModule	The spawn module.
TArray< class U...	SpawnModules	List of spawn modules that need to be invoked at runtime.
UParticleModule...	SpawnPerUnitModule	The spawn-per-unit module.
FComposableFloa...	SubImageIndex	The sub-image index over the particle's life time.
FComposableFloa...	VectorFieldScale	The per-particle vector field scale.
FComposableFloa...	VectorFieldScaleOverLife	The per-particle vector field scale-over-life.

Constructors

	Name	Description
	FParticleEmitterBuildInfo()	Default constructor.