Node Reference
Signal Nodes
Mathematical operations, waveform generation, and signal timing/shape manipulation nodes.
Signal processing nodes perform mathematical operations, generate waveforms, and manipulate signal timing and shape.
| Field | Value |
|---|
| Type ID | math |
| Category | Signal Processing |
| Description | Element-wise binary math operations with broadcasting. |
| Port | Type | Required |
|---|
a | Signal | Yes |
b | Signal | Yes |
| Name | Type | Default | Description |
|---|
operation | string | -- | One of the operations listed below |
| Operation | Formula | Description |
|---|
add | a + b | Addition |
subtract | a - b | Subtraction |
multiply | a * b | Multiplication |
divide | a / b | Division |
max | max(a, b) | Element-wise maximum |
min | min(a, b) | Element-wise minimum |
abs_diff | |a - b| | Absolute difference |
abs | |a| | Absolute value (only uses input a) |
modulo | a % b | Modulo |
circular_distance | min(|a-b|, 1-|a-b|) | Shortest distance on a [0,1] ring |
- Full broadcasting: output shape is
max(a, b) per dimension (N, T, C).
circular_distance is useful for angular/cyclic patterns where 0.0 and 1.0 are adjacent.
| Field | Value |
|---|
| Type ID | round |
| Category | Signal Processing |
| Description | Rounding operations. |
| Port | Type | Required |
|---|
in | Signal | Yes |
| Name | Type | Default | Description |
|---|
operation | string | -- | One of: floor, ceil, round |
floor: rounds toward negative infinity.ceil: rounds toward positive infinity.round: rounds to nearest integer (half rounds away from zero).
| Field | Value |
|---|
| Type ID | threshold |
| Category | Signal Processing |
| Description | Binary threshold (step function). |
| Port | Type | Required |
|---|
in | Signal | Yes |
| Name | Type | Default | Description |
|---|
threshold | float | 0.5 | Threshold value |
- Output is 1.0 if input >= threshold, else 0.0.
- Useful for converting continuous envelopes into binary triggers.
| Field | Value |
|---|
| Type ID | normalize |
| Category | Signal Processing |
| Description | Min-max normalization to [0, 1]. |
| Port | Type | Required |
|---|
in | Signal | Yes |
None.
- Formula:
(value - min) / (max - min).
- If all values are equal (max == min), outputs 0.0 to avoid division by zero.
- Min and max are computed across all dimensions of the input signal.
| Field | Value |
|---|
| Type ID | falloff |
| Category | Signal Processing |
| Description | Non-linear attenuation with adjustable width and curve shape. |
| Port | Type | Required |
|---|
in | Signal (values 0-1) | Yes |
| Name | Type | Default | Description |
|---|
width | float | 1.0 | Controls spread of the falloff |
curve | float | 0.0 | Shape: -1=snappy/sharp, 0=linear, +1=gentle/swell |
- Processing pipeline: clamp to [0, 1], scale by width, apply shape curve (exponential).
- Essential for creating sharp vs. soft spatial transitions in chase patterns.
- A narrow width with a snappy curve creates a tight "spotlight" effect; wide width with a gentle curve creates a broad wash.
| Field | Value |
|---|
| Type ID | invert |
| Category | Signal Processing |
| Description | Reflects values around the midpoint of the observed range. |
| Port | Type | Required |
|---|
in | Signal | Yes |
None.
- Formula:
reflected = 2 * midpoint - value, where midpoint is (min + max) / 2.
- Result is clamped to [min, max] of the input range.
- For a signal in the 0.0-1.0 range, this is equivalent to
1.0 - value.
| Field | Value |
|---|
| Type ID | scalar |
| Category | Signal Processing |
| Description | Constant scalar value. |
None.
| Port | Type |
|---|
out | Signal (N=1, T=1, C=1) |
| Name | Type | Default | Description |
|---|
value | float | 1.0 | The constant value |
- Broadcasts to any shape when connected to nodes that expect larger signals.
| Field | Value |
|---|
| Type ID | ramp |
| Category | Signal Processing |
| Description | Linear beat counter from 0 to total beats. |
| Port | Type | Required |
|---|
grid | BeatGrid | Yes |
| Port | Type |
|---|
out | Signal (N=1, T=SIMULATION_RATE x duration, C=1) |
None.
- Formula:
beat_count = (current_time - start_time) * (BPM / 60).
- Output is monotonically increasing over the pattern duration.
- Commonly used with
modulo and math(subtract) to create repeating spatial chases.
| Field | Value |
|---|
| Type ID | ramp_between |
| Category | Signal Processing |
| Description | Linear interpolation from start value to end value over the pattern duration. |
| Port | Type | Required |
|---|
grid | BeatGrid | Yes |
start | Signal | Yes |
end | Signal | Yes |
| Port | Type |
|---|
out | Signal (N=1, T=SIMULATION_RATE x duration, C=1) |
None.
- Formula:
output = start + (end - start) * (beats / total_beats).
- At the first beat, output equals
start; at the last beat, output equals end.
- Useful for creating gradual transitions (e.g., increasing intensity, shifting color over a section).
| Field | Value |
|---|
| Type ID | modulo |
| Category | Signal Processing |
| Description | Modulo operation (positive remainder). |
| Port | Type | Required |
|---|
in | Signal | Yes |
| Name | Type | Default | Description |
|---|
divisor | float | 1.0 | The divisor for the modulo operation |
- Uses Euclidean mod:
((value % divisor) + divisor) % divisor (always positive).
- With
divisor=1.0, wraps any value into the [0, 1) range.
- Essential for creating repeating patterns from monotonically increasing ramps.
| Field | Value |
|---|
| Type ID | sine_wave |
| Category | Generator |
| Description | Beat-synced sinusoidal oscillator. |
| Port | Type | Required |
|---|
grid | BeatGrid | Yes |
| Port | Type |
|---|
out | Signal (N=1, T=sim, C=1) |
| Name | Type | Default | Description |
|---|
subdivision | float | 1.0 | Cycles per beat (1 = one full cycle per beat, 0.5 = every 2 beats, 2 = twice per beat) |
phase_deg | float | 0 | Phase offset in degrees |
amplitude | float | 1.0 | Output amplitude |
offset | float | 0.0 | DC offset added to output |
- Derives frequency from the beat grid:
freq_hz = subdivision * (bpm / 60).
- Formula:
output = offset + amplitude * sin(2 * pi * freq_hz * t + phase_rad).
- Output range (with defaults): [-1.0, 1.0].
- Useful for beat-synced LFO effects (e.g., breathing at 0.25 = every 4 beats, color cycling at 0.5 = every 2 beats).
| Field | Value |
|---|
| Type ID | remap |
| Category | Signal Processing |
| Description | Linear range remapping (like Arduino's map() function). |
| Port | Type | Required |
|---|
in | Signal | Yes |
| Port | Type |
|---|
out | Signal (same N and T as input, C=1) |
| Name | Type | Default | Description |
|---|
in_min | float | -1.0 | Input range minimum |
in_max | float | 1.0 | Input range maximum |
out_min | float | 0.0 | Output range minimum |
out_max | float | 180.0 | Output range maximum |
clamp | bool | false | Whether to clamp output to [out_min, out_max] |
- Formula:
output = out_min + (input - in_min) / (in_max - in_min) * (out_max - out_min).
- When
clamp is false, values outside the input range will extrapolate beyond the output range.
- Useful for converting signal ranges (e.g., sine wave [-1, 1] to pan angle [0, 360]).
| Field | Value |
|---|
| Type ID | noise |
| Category | Signal Processing |
| Description | 3D fractal Perlin-like value noise with octaves. |
| Port | Type | Required |
|---|
time | Signal | Yes |
x | Signal | Yes |
y | Signal | Yes |
| Port | Type |
|---|
out | Signal (N=max(x.N, y.N), T=max inputs, C=1) |
| Name | Type | Default | Description |
|---|
scale | float | -- | Spatial/temporal frequency multiplier |
octaves | int (1-8) | -- | Fractal detail layers |
amplitude | float | -- | Output scale |
offset | float | -- | Output offset |
- Uses smoothstep-interpolated value noise with fractal octave composition.
- Each octave doubles frequency and halves amplitude (standard fBm).
- The 3D input (time, x, y) allows spatially and temporally varying noise.
- Useful for organic, non-repeating effects like flickering, turbulence, or natural movement.
| Field | Value |
|---|
| Type ID | time_delay |
| Category | Signal Processing |
| Description | Per-fixture time offset with interpolation. |
| Port | Type | Required |
|---|
in | Signal | Yes |
delay | Signal | No (per-N delay values) |
None.
- For each fixture n:
sample_time = current_time - delay[n].
- Creates chase effects when combined with spatial attributes (e.g.,
get_attribute(normalized_index) as delay values).
- Linear interpolation between samples for smooth sub-frame offsets.
| Field | Value |
|---|
| Type ID | orbit |
| Category | Signal Processing |
| Description | Elliptical 3D circular motion (for moving light targets). |
| Port | Type | Required |
|---|
grid | BeatGrid | Yes |
phase | Signal | No (per-N phase offsets) |
| Port | Type |
|---|
x | Signal (N=phase.N or 1, T=256, C=1) |
y | Signal (N=phase.N or 1, T=256, C=1) |
z | Signal (N=phase.N or 1, T=256, C=1) |
| Name | Type | Default | Description |
|---|
center_x | float | -- | Center point X coordinate |
center_y | float | -- | Center point Y coordinate |
center_z | float | -- | Center point Z coordinate |
radius_x | float | -- | Ellipse radius along X axis |
radius_z | float | -- | Ellipse radius along Z axis |
speed | float | -- | Rotations per beat cycle |
tilt_deg | float | -- | Plane tilt angle in degrees |
- Full 3D orbit with tilt applied to the orbital plane.
- The
phase input enables per-fixture offset for staggered orbits (e.g., fixtures tracing the same circle but at different positions).
- Produces three separate coordinate outputs for use with
look_at_position or apply_position.
| Field | Value |
|---|
| Type ID | random_position |
| Category | Signal Processing |
| Description | Random 3D point in bounding box, held until trigger changes. |
| Port | Type | Required |
|---|
trigger | Signal | Yes |
| Port | Type |
|---|
x | Signal (N=1, T=trigger.T, C=1) |
y | Signal (N=1, T=trigger.T, C=1) |
z | Signal (N=1, T=trigger.T, C=1) |
| Name | Type | Default | Description |
|---|
min_x | float | -- | Bounding box minimum X |
max_x | float | -- | Bounding box maximum X |
min_y | float | -- | Bounding box minimum Y |
max_y | float | -- | Bounding box maximum Y |
min_z | float | -- | Bounding box minimum Z |
max_z | float | -- | Bounding box maximum Z |
- Hash-seeded randomness ensures deterministic output per trigger value.
- Position is held constant until the trigger signal changes value (e.g., on a beat pulse).
- Useful for making moving lights jump to random positions on each beat.
| Field | Value |
|---|
| Type ID | smooth_movement |
| Category | Signal Processing |
| Description | Rate-limited pan/tilt movement simulating physical motor speed. |
| Port | Type | Required |
|---|
pan_in | Signal | Yes |
tilt_in | Signal | Yes |
| Port | Type |
|---|
pan | Signal |
tilt | Signal |
| Name | Type | Default | Description |
|---|
pan_max_deg_per_s | float | 360 | Maximum pan speed in degrees per second |
tilt_max_deg_per_s | float | 180 | Maximum tilt speed in degrees per second |
- Clamps the delta per time step to the maximum speed.
- Prevents unrealistic instant movement that would not be physically achievable by real fixtures.
- Place between position-generating nodes and
apply_position for realistic motion.