Notch Notch Manual 0.9.23
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Procedural Emitter

Procedural Emitter

Emit particles from a Procedural system.

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Method #

This node is used to emit particles from a Procedural system, using the Signed Distance Field to indicate where to emit the particles and modulate their alpha.

The transformation values of this node will be inherited by its children. Furthermore, Affectors, Shading, and Rendering nodes will only be effective to the particles emit by this emitter.

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 XMove along the local x-axis.
Position YMove along the local y-axis.
Position ZMove along the local z-axis.
Rotation HeadingRotate around the local y-axis.
Rotation PitchRotate around the local x-axis.
Rotation BankRotate around the local z-axis.
Scale XScale along the local x-axis.
Scale YScale along the local y-axis.
Scale ZScale along the local z-axis.

Toggle which transform channels should be inherited from the parent node. By default, all transforms will be inherited.

ParameterDetails
Position XToggle inheritance of the X Position from the parent.
Position YToggle inheritance of the Y Position from the parent.
Position ZToggle inheritance of the Z Position from the parent.
Rotation HeadingToggle inheritance of the Rotation Heading from the parent.
Rotation PitchToggle inheritance of the Rotation Pitch from the parent.
Rotation BankToggle inheritance of the Rotation Bank from the parent.
Scale XToggle inheritance of the X Scale from the parent.
Scale YToggle inheritance of the Y Scale from the parent.
Scale ZToggle inheritance of the Z Scale from the parent.
World Position OnlyInherit the world position from the parent only, rotation and scale will be ignored. Overrides above properties.
Inherit TimeToggle inheritance of time from the parent.

These properties control the core behaviours of the node.

ParameterDetails
RandomnessHow much randomness is added in the particles movement.
LifeControl the randomness for the life of each particle.
Life RandomnessControl the randomness for the life of each particle.
Emission RateWhat percentage of the particles are emitted from the emitter per second.
Max Particle CountSet a maximum particle count for the emitter.
Respawn EnabledToggle whether a particle can respawn.

These properties control how the procedural system is sourced for particle emission.

ParameterDetails
Distance To Alpha ScaleScale the alpha of the particles based on distance from the procedural surface.
Distance To ScaleScale the size of the particles based on distance from the procedural surface.
Min DistanceMinimum distance away from the surface to spawn particles, facing inwards. Particles closer to the surface than this value will not be spawned.
Max DistanceMaximum distance away from the surface to spawn particles, facing inwards. Particles further away from to the surface than this value will not be spawned.
Cull Overlapping ParticlesRemove particles which are too spawned close to each other.
Cull Overlapping Particles ScaleScale the radius used to select which particles should be removed.
Min ScaleThe minimum scale of the particles, if the Distance To Scale is not 0.
Max ScaleThe maximum scale fo the particles, if the Distance To Scale is not 0
Use Procedural ColoursAllow the particles to pick up colours from the procedural system.
Grid SizeThe number of voxels on one axis used to spawn the particles. High resolutions will result in a denser generation of particles, relative to the size of the bounding box.

Tints the particles colours from the emitter. To enable, add an colour ramp input to this node.

ParameterDetails
Colour Selection ModeChoose how the input colour affects the particles.
  • Input Colour : the first colour input is the only colour output.
  • Selected Single Colour : Uses the Colour selection parameter to decide which colour to use from the input ramp.
  • Emission Time : colour is selected based on time at which the particle is emitted.
  • Random Colour : the colour is selected randomly at the particles creation.
Colour Selection ParametersA number used to select the colour output.

These properties control the material the particles use for emission.

ParameterDetails
ColourRGB colour of particles.
DiffuseControl how much the light is scattered from the surface of the object.
EmissivenessControl how much light is emitted by the particle.
Life Colour Affecter WeightControls how much the result of any Life Colour Shading nodes are blended with the particle’s colour.
Particle ScaleScale the size of the particle.
Dof AmountHow much depth of field effects the particles material.
DensityThe density, for use in some simulations.
TemperatureThe density, for use in some simulations.
Cooling RateThe cooling rate, for thermal dynamics simulations.
Density DecayControl the rate of decay in the density.
Fade In TimeWhat percentage through the particles life span the particle fades in.
Fade Out TimeWhat percentage through the particles life span the particle fades out.

Inputs

NameDescriptionTypical Input
Procedural RootConnect a source procedural node.Procedural Root
Bounding BoxLimits the area that the procedural emitter will use.Bounding Box
Colour Control NodesControl the colours of the particles on emission.Colour Ramp
Transform ModifierApply 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

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