> modifiers

Advect

modifiers/advect·v1.3.0

IN:2 OUT:1

SUMMARY

The Advect operator moves instances along vector fields. It reads velocity or direction data from point attributes or reference geometry and applies continuous movement based on the sampled vectors.

The operator includes options for rotation alignment, allowing instances to automatically orient themselves in the direction of motion.

PARAMETERS

PAGEAdvect

Group	Group	If there are input groups, specifying a group name in this field will cause this POPX to act only upon the group specified.
Do Falloff	Dofalloff	Enables falloff-based advection intensity control.
Falloff Attribute	Falloffattr	Specifies which attribute to use for falloff values that attenuate advection strength.
[+]Advect Source	Advectsource	Determines whether to read advection vectors from point attributes or reference geometry.
Advect Attribute	Advectattr	Name of the vector attribute to use for advection direction and speed.
Max Search Distance	Maxdistance	Maximum distance to search for nearest neighbor points on reference geometry.
[+]Lookup Mode	Lookupmode	Determines how advection vectors are sampled from reference geometry.
[+]Distribution	Distribution	Method for selecting neighbor points when using reference geometry.
Max Points for Average	Maxptsavg	Maximum number of points to include when averaging vectors in Average lookup mode.
Time Step	Timestep	Controls the integration step size for advection movement. Higher values result in faster movement.
Rotate to Vector (Forward Direction)	Rotateto	Enables automatic rotation of instances to align with the advection vector direction.
Feedback POP	Feedbackpop	Reference to the feedback POP that drives the advection simulation.
Passthrough Attributes	Passthroughattrs	Attributes to pass through from the initial POP connected to the feedback POP.
Enable Life	Enablelife	Enables lifespan-based particle death when using feedback loop advection.
Seed	Lifeseed	Numerical value that initializes the randomization for life variance.
Life Span	Lifespan	Base duration in seconds that particles exist before being removed.
Life Variance	Lifevariance	Random variation added to the life span for each particle.

PAGECommon

Bypass	Bypass	Pass through the first input to the output unchanged.
Free Extra GPU Memory	Freeextragpumem	Free memory that has accumulated when output memory has grown and shrunk.
Render Primitives	Renderprimitives	Toggles rendering of POPX Geometry or shows it as point instances only.
Convert to Point Primitives	Converttoptprim	Converts points to primitive points when Render Primitives is toggled off.
SRT / RST	Srtrst	Sets the transform order when using POPX Geometry as built-in TouchDesigner instances.

INPUTS

Input 0 POP – POPX/POP Geometry

Input 1 POP – Reference Geometry

OUTPUTS

Output 0 POP – POPX_out1