Node Catalog

This page is the complete catalog of node types GLIDER supports, grouped by what they do.

Library palette vs. the full catalog

The Node Library palette you drag from is a focused set for building common experiments — Start/End Experiment and Delay (Flow), Start/End Function (Functions), Loop and Wait For Input (Control), Output and Input (I/O), plus Audio, Video, and dynamic sections for your custom devices, functions, and camera zones. The remaining node types below (math, comparison, PID, and the interface widgets) are part of experiments loaded from .glider files. Hardware is driven through the Output/Input nodes and the generic Device Action/Device Read nodes rather than a node per device.

Ports at a glance

Most nodes have an exec input and output (the "go" pulse that decides order) plus some data ports (values in and out). See How GLIDER Works for the exec-vs-data distinction.

Flow control

The backbone of every experiment — where it starts, ends, repeats, and waits.

Node	What it does
StartExperiment	Entry point — begins the experiment flow.
EndExperiment	Exit point — ends the experiment.
Loop	Repeats its body a set number of times, then continues.
Sequence	Fires its outputs one after another, in order.
Delay	Waits for a set duration, then continues.
Timer	Triggers execution at a regular interval.
WaitForInput	Pauses until an input condition is met — a digital signal, a threshold, or a target number of encoder revolutions/counts.
StartFunction	Entry point for a reusable function.
EndFunction	Exit point for a function.
FunctionCall	Runs a defined function from elsewhere in the graph.

Hardware

Drive and read physical devices. Most bind to a device in their Properties panel.

Node	What it does
Output	Writes to a bound device — digital HIGH/LOW or a PWM value.
Input	Reads from a bound device (digital or analog).
Digital Write	Writes HIGH or LOW to a digital output pin.
Digital Read	Reads HIGH or LOW from a digital input pin.
Analog Read	Reads an analog value from a device.
PWM Write	Writes a PWM value (range set by the device).
Device Action	Executes a named action on a device (e.g. a Bluetooth write).
Device Read	Reads a value from a device.
MotorGovernor	Controls a motor governor — up, down, or stop.

Logic & math

Compute, compare, and shape values that flow along data wires.

Node	What it does
Add	A + B
Subtract	A − B
Multiply	A × B
Divide	A ÷ B
Clamp	Constrains a value between a min and max.
Map Range	Rescales a value from an input range to an output range.
In Range	Tests whether a value falls within a min/max range.
Threshold	Tests whether a value crosses a threshold, with optional hysteresis.
PID Controller	Proportional–Integral–Derivative control loop.
Toggle	Flips its state each time it's triggered.

Interface

On-screen controls and readouts for the dashboard.

Node	What it does
Button	A clickable button that triggers execution.
Slider	A slider for continuous value input.
Toggle Switch	An on/off switch.
Numeric Input	A numeric field with virtual-keypad support (touch-friendly).
Chart	A real-time chart of values.
Gauge	Shows a value as a gauge/meter.
Label	Displays a value as text.
LED Indicator	An on/off indicator light.
Zone Input	Monitors camera-zone occupancy and triggers on enter/exit.
VideoPlayback	Plays a video clip.
AudioPlayback	Plays an audio clip.

New device types add nodes automatically

Custom and plugin devices expose their actions through the generic Device Action and Device Read nodes — you don't need a bespoke node per device.