> modifiers

Filter

modifiers/filter·v1.4.0

IN:1 OUT:1

SUMMARY

The Filter smooths incoming values per instance using a history buffer. Unlike the Spring Modifier - which rebounds - the Filter purely reduces jitter and noise without overshooting. Works on position, rotation, scale, or any custom float attribute.

Six filter types: Gaussian and Box blend a window of frames with different weighting curves, their Left Half variants use only past frames for causal smoothing, De-spike replaces single-frame outliers, and One Euro adapts its strength based on signal speed.

Effect blends between raw and filtered output. Do Falloff lets each instance receive a different filter strength via a float attribute. Use Initialize to clear history after a position jump, Start to begin a fresh pass.

PARAMETERS

PAGEFilter

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.
Target Points Update POP	Pointsupdatepop	Reference to a POP node downstream in the network when Solver Mode is set to Advect. This reference will cause a feedback loop and re-injects the points next frame.
Do Falloff	Dofalloff	Enables falloff-based attenuation of filter effects.
Falloff Attribute	Falloffattr	Specifies which attribute to use for falloff values that attenuate filter intensity.
Position	Position	Applies filter smoothing to instance position.
Rotation	Rotation	Applies filter smoothing to instance rotation.
Scale	Scale	Applies filter smoothing to instance scale.
Other	Other	Enables filter smoothing for a custom float attribute.
Attribute (Float)	Attr	Specifies which float attribute to apply filter smoothing to when Other is enabled.
[+]Filter Type	Filtertype	Algorithm used to combine history buffer samples. Each type trades off smoothness, lag, and transient handling differently.
Effect	Effect	Blends between raw input (0) and fully filtered output (1). Intermediate values mix the two.
Filter Width (Seconds)	Width	History window size in seconds. Larger = smoother but more lag. Try 0.05-0.1s for light cleanup, 0.2-0.5s for strong smoothing.
Gaussian Sigma	Sigma	Bell curve spread as a fraction of filter width. Low (0.1-0.2) = subtle, minimal lag. High (0.4-0.5) = strong smoothing, more lag. Gaussian and Left Half Gaussian only.
Spike Tolerance	Spike	Max deviation before a sample is classified as a spike. Units match the attribute (world units for position, degrees for rotation). De-spike only.
Cutoff Frequency (Hz)	Cutoff	Minimum low-pass cutoff in Hz when the signal is stationary. Lower = heavier smoothing at rest. Try 1-5 Hz for tracking data. One Euro only.
Speed Coefficient	Speedcoeff	How aggressively the cutoff opens as the signal speeds up. 0 = always maximum smoothing. Higher (0.5-2.0) = less smoothing during fast movement. One Euro only.
Slope Cutoff Frequency (Hz)	Slopecutoff	Cutoff Hz for the internal speed estimator. Lower = smoother speed estimate, slower adaptation. Higher = faster response to motion onset. One Euro only.
Initialize	Initializepulse	Resets the filter history to initial conditions.
Start	Startpulse	Begins filtering from the current state.
Play	Play	Toggles filter playback on or off.

PAGEFalloff

Preview Falloff	Previewfalloff	Visualizes the Other float attribute as colors when Other is enabled.
[+]Falloff Ramp	Fallofframp	Color ramp used to visualize the Other float attribute when Preview Falloff is active.
Open Custom Ramp Editor	Opencustomrampeditor	Opens the editor for creating a custom visualization gradient.
Reset Custom Ramp	Resetcustomramp	Resets the custom ramp to default gradient values.

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