> falloffs

Noise Falloff

falloffs/noise-falloff·v1.4.0

IN:1 OUT:1

SUMMARY

The Noise Falloff generates a Falloff Attribute from a procedural noise field, allowing you to sculpt organic variation across POPX or regular POP geometry. It supports 2D/3D/4D Perlin and Simplex noise with full harmonic, amplitude, exponent, and offset controls.

A full transform stack (Translate, Rotate, Scale, Pivot) positions the noise field in world space, and the 4D modes expose a Translate 4D parameter for animating through the additional dimension.

Falloff combine operations, remap controls, and an optional preview ramp match the rest of the falloff family so this operator drops cleanly into any falloff chain.

PARAMETERS

PAGENoise

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.
Use Rest Attribute	Userestattr	When enabled, evaluates noise using rest positions instead of current positions, preserving the noise pattern during deformations.
[+]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.
Normalized Noise	Normalizednoise	When enabled, automatically normalizes noise output to 0-1 range.
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.

PAGETransform

[+]Transform Order	Xord	Sets the overall transform order for the transformations.
[+]Rotate Order	Rord	Sets the order of the rotations within the overall transform order.
[+]Translate	T	Translate the points through the noise space.
[+]Rotate	R	Rotate the points around the corresponding X, Y and Z axes. Angles are given in degrees.
[+]Scale	S	These three fields scale the Source geometry in the three axes.
[+]Pivot	P	The pivot point for the transform rotates and scales.
Translate 4D	T4d	Translates the points through the 4th noise dimension.

PAGEFalloff

[+]Combine Operation	Combineop	Mathematical operation used to combine this falloff with existing falloff values.
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	Opencustomrampeditor	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.

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

OUTPUTS

Output 0 POP – POPX_out1