Notch Notch Manual 0.9.23
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Velocity Affector

Velocity Affector

Applies a directional velocity to a field.



Method #

This node applies a directional velocity to the movement vectors of the field, pushing everything in the field along one direction.

The outputs from this node are just its transforms, useful for having multiple nodes follow the same motions without controlling each of their transforms individually.


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.

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.

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.

Velocity AmountScale the generated affector velocities.
Spread AngleControls how much the spread there is from the field velocities generated.
RadiusThe outer radius for which the affector is active.
Inner RadiusEdit the size of the inner area the affector can affect.
RandomnessThe randomness of the new velocities added to the simulation.
ModeChange how the velocity affects the field.
  • Directional Velocity : Pushes the field along the local z axis.
  • Repel : Pushes the fields away from the affector origin point.
  • Attract : Pulls the field towards the affectors origin point.
Falloff ShapeThe shape of the affector falloff.
  • Point : The affector falls off in distance from a point.
  • Line : The affector falls off in distance from a line.
  • Plane : The affector falls off in distance from a 2D plane.


NameDescriptionTypical Input
Velocity NodeA transform node that overrides the velocity direction and source position.Null
Mask NodeMasks the areas in which the affector won’t apply.Image Plane
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