UI Knob

A rotary knob control driven by drag input.

Input input knob rotary

Controls demonstrated: UI Knob

Overview

This scene demonstrates the UI Knob, a rotary dial control that behaves like a knob on a stereo or amplifier. It shows reading the knob’s live value, displaying it on screen, and driving the knob to a specific value from script. Use it when you need a rotational input rather than a linear slider.

Controls Featured

• UI Knob — the rotary knob the user drags to set a value, with its value read back and set programmatically.

Scene Setup

1. Add the UI Extensions Samples sample to your project (open the package in the Unity Package Manager and import UI Extensions Samples), or copy Examples~/UIKnobExample/ into your project’s Assets/ folder.
2. Open the UIKnobExample scene in that folder.
3. Press Play.

What to Expect

Drag the knob with the mouse (or touch) to rotate it. A text label continuously updates to show the knob’s current KnobValue. An input field plus button let you type a target value and apply it; pressing the button rotates the knob to that value via SetKnobValue. The knob’s range, direction, loops and snapping are configured on the UI_Knob component in the inspector.

Key Code Patterns

public class KnobManagement : MonoBehaviour
{
    public Text KnobValue;
    public InputField SetKnobValue;
    public UI_Knob Knob;

    public void UpdateKnobValue()
    {
        Knob.SetKnobValue(float.Parse(SetKnobValue.text));
    }

    void Update()
    {
        KnobValue.text = Knob.KnobValue.ToString();
    }
}