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Manual 1.0 Manual 0.9.23
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Particle Event

Particle Event

Updated: 18 Feb 2025

Modify particles using a dynamic per particle event.

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Example .dfx

Method #

Particle Events are used to affect change in a particle system when something happens to an individual particle; for example, when a collision occurs between the particle and a collision surface, new particles may be emitted at that point; or when a particle reaches a certain age, it may change size and colour. Events are specified as a cause, set via the Cause Type parameter, and effect, set by the Event Type parameter. Particles are monitored for occurrence of the cause; when it occurs, the event is executed.

The Particle Use Amount parameter may be used to restrict the set of the particles so that not every particle for whom the cause occurs will trigger the event. For events which emit new particles or change particle materials there must be a Particle Emitter connected to the Target Emitter input.

The child of this node is the emitter which will be used to emit new particles from.

Parameters

These properties control the 3D transforms of the node. Transforms will generally be inherited by child nodes, although they can be ignored through the Inherit Transform Channels attributes.

ParameterDetails
Position X The objects position along the local x-axis.
Position Y The objects position along the local y-axis.
Position Z The objects position along the local z-axis.
Rotation Heading The objects rotation around the local y-axis.
Rotation Pitch The objects rotation around the local x-axis.
Rotation Bank The objects rotation around the local z-axis.
Scale X The objects scale along the local x-axis.
Scale Y The objects scale along the local y-axis.
Scale Z The objects scale along the local z-axis.

Control the inheritance of the transforms from the parent.

ParameterDetails
Position Toggle inheritance of the Position from the parent.
Rotation Toggle inheritance of the Rotation from the parent.
Scale Toggle inheritance of the Scale from the parent.
World Position Only Inherit the world position from the parent only, rotation and scale will be ignored. Overrides above properties.
Inherit Time Toggle inheritance of time from the parent.

These properties control the core behaviours of the node.

ParameterDetails
Cause Type What kind of event triggers the node.
  • Collision : A collision occured between the particle and a collision surface such as an Collision Affector.
  • Particle Life : The particle reached a certain remaining life time.
  • Particle Time : The particle reached a certain time since birth.
  • Event Node Time : The event node reached a certain point on the timeline.
  • Layer Time : The layer reached a certain point on the timeline.
  • Velocity : The particle’s velocity reached a certain magnitude.
Event Type What kind of event is triggered.
  • None : No event is triggered
  • Change Emitter Material : The particle’s emitter is changed, causing it to take on a new material - which can be used to change size or colour
  • Emit New Particles : New particles are emitted at the particle’s location
  • Emit New Particles And Kill : New particles are emitted at the particle’s location and the particle itself is killed.
Particle Use Amount Percentage of particles that can be used by the node.
Time Value The time value used for cause types Particle Time, Event Node Time and Layer Time.
Particle Life Amount The life value used for cause type Particle Life.
Num New Particles How many new particles are generated with cause types Emit New Particles and Emit New Particles And Kill.
Trigger Value Value needed to trigger the particle event.

Inputs

NameDescriptionTypical Input
Target EmitterThe new emitter to use, for cause types Change Emitter Material, Emit New Particles and Emit New Particles And Kill.Primitive Emitter
Affected EmittersChoose which particle emitters can be affected by the affector.Primitive Emitter
Transform ModifiersApply the transforms of another node to this node.Null
Target NodeModifiy the rotations of the node to always direct the z axis towards the input.Null
Local Transform OverrideApply the transforms of another node to this node, relative to its parent.Null