> falloffs

Spread Falloff

falloffs/spread-falloff·v1.3.0

IN:2 OUT:1

SUMMARY

The Spread Falloff creates falloff patterns that propagate outward from seed points through neighboring point connections, creating organic wave-like patterns that respect the structure of your mesh.

This operator is very similar to the Infection Falloff, but unlike Infection, it is not a simulation. The spread behavior is directly controlled by the Spread parameter. You can choose between radius or connectivity methods like the Infection Falloff.

Multiple Seed Fields: Seeds can be specified via the Seed POP parameter or Input 1, where each point defines a separate seed field - one point per seed. The attributes of the seed POP are named the same as parameter tokens in the Spread Falloff operator, and override the parameters for each seed. You need only to create a Point POP with attributes named as the Spread Falloff parameters, and then add a point per seed, and set their values. (An attribute P will override the Position parameter, and an attribute radius will override the Radius parameter.) Alternately you can generate points procedurally with attributes that match the Spread Falloff parameter names.

PARAMETERS

PAGESpread

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.
[+]Spread By	Spreadby	Determines how the operator identifies neighboring points for spread propagation.
[+]Distribution	Distribution	Controls how neighboring points are selected when using radius-based search.
Search Radius	Searchradius	The maximum distance within which points are considered neighbors for spread propagation.
Max Connections	Maxconnections	Limits the maximum number of neighboring connections each point can have.
Falloff Width	Falloffwidth	Controls how quickly the falloff strength diminishes as it spreads from the seed points.
Spread	Spreadamount	Adds randomization to the spread pattern, creating more organic and varied falloff.

PAGESeed

Display Seed Selection	Displayseed	Visualize the seed selection region for infection starting points.
Threshold	Seedthreshold	Minimum value required for a point to become a seed.
Use Seed Attribute	Useseedattr	Use an existing point attribute to define seed values instead of spatial selection.
Seed Attribute	Seedattr	Name of the attribute to use for seed values (when Use Seed Attribute is enabled).
Seed POP	Seedpop	Reference to a POP containing points to use as seeds when no second input is connected.
[+]Position	Position	Center position of the seed selection region. Can be overridden per-seed using a P point attribute.
Radius	Radius	Size of the seed selection region. Can be overridden per-seed using a radius point attribute.
Transition Range	Transitionrange	Determines a transition range for seed fields. Can be overridden per-seed using a transitionrange point attribute.
Transition Align	Transitionalign	Determines a transition offset for seed fields. Can be overridden per-seed using a transitionalign point attribute.
[+]Transition Type	Transitiontype	Determines a transition function for seed fields. Can be overridden per-seed using a transitiontype point attribute.
Output Seed Attribute	Outputseedattr	Write the seed selection values to an output attribute.

PAGENoise

[+]Combine Operation

Combineop

Mathematical operation used to combine this falloff with existing falloff values.

PAGEFalloff

Combine Falloff Attribute	Combattrscope	Specifies which falloff attribute to combine with when Combine Operation is not set to Set.
Swap Operation Order	Swaporder	Reverses the order of operands in the combine operation (A op B becomes B op A).
Combine Strength	Combstrength	Blending factor for the combine operation, ranging from 0 (no effect) to 1 (full effect).
Output Falloff Attribute	Outputfalloffattr	Name of the attribute where the final falloff values will be stored.
Preview Falloff	Previewfalloff	When enabled, visualizes falloff values using a color ramp.
[+]Falloff Ramp	Fallofframp	Color ramp preset used for visualizing falloff values when Preview Falloff is enabled.
Open Custom Ramp Editor	Opencustumrampeditor	Opens the custom color ramp editor for defining a custom falloff visualization gradient.
Reset Custom Ramp	Resetcustomramp	Resets the custom color ramp to its default state.

PAGENoise

Apply Noise

Applynoise

When enabled, adds procedural noise to the falloff values for organic variation.

[+]Combine Operation

Combineopnoise

How noise values are combined with the base falloff (Add or Multiply).

PAGENoise

[+]Type	Type	Noise algorithm type (Perlin, Simplex, etc.).
Seed	Seed	Numerical value that initializes the randomization.
Period	Period	Period (scale) of the noise field.
Harmonics	Harmon	The number of higher frequency components to layer on top of the base frequency. 0 harmonics give the base shape.
Harmonic Spread	Spread	The factor by which the frequency of a harmonic increases relative to the previous harmonic.
Harmonic Gain	Gain	Amplitude of the Harmonics layered on top of the base frequency.
Amplitude	Amp	The noise values amplitude (a scale on the values output).
Exponent	Exp	Sets the exponent. The internal value is raised by the power of the exponent.
Offset	Offset	Adds an offset to the resulting value.
[+]Transform Order	Xordnoise	Sets the overall transform order for the transformations.
[+]Rotate Order	Rordnoise	Sets the order of the rotations within the overall transform order.
Translate	Tnoise	Translate the points through the noise space.
Rotate	Rnoise	Rotate the points around the corresponding X, Y and Z axes. Angles are given in degrees.
Scale	Snoise	These three fields scale the Source geometry in the three axes.
Pivot	Pnoise	The pivot point for the transform rotates and scales.
Translate 4D	T4dnoise	Translates the points through the 4th noise dimension.

PAGERemap

Enable Remap	Remap	Enables remapping controls for adjusting falloff value range and distribution.
Clamp	Clamp	When enabled, constrains falloff values to the 0-1 range.
Fit	Fit	Enables remapping of falloff values from an input range to an output range.
Auto Input Min Max	Auto	Automatically determines input range from actual min/max falloff values.
Input Min	Inputmin	Minimum value of the input range for remapping.
Input Max	Inputmax	Maximum value of the input range for remapping.
Output Min	Outputmin	Minimum value of the output range for remapping.
Output Max	Outputmax	Maximum value of the output range for remapping.
Invert	Invert	Reverses the falloff values (1 - value).
Enable Ramp Remap	Enablerampremap	Applies a custom curve defined by a ramp to remap the falloff values.
Open Ramp Editor	Openrampeditor	Opens the ramp editor for defining the custom remapping curve.
Reset Ramp	Resetramp	Resets the remap ramp editor.
Custom Ramp TOP	Customramptop	Reference to an external TOP for remap control. When specified, overrides the internal ramp editor.

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 – Seed

OUTPUTS

Output 0 POP – POPX_out1