GUI (Graphical User Interface)

As we've already learned Three.js for a while, you might have noticed how tweaking properties like positions, rotations, or colors can be a bit tedious.

That’s where come in handy. In this lesson, we’ll explore , specifically lil-gui, and learn how to integrate it into your projects to make development smoother and more interactive.

What is a GUI Library and Why Use One ?

A provides an interface that allows you to adjust values and settings in real time, instead of manually changing them in your code. This is especially useful in when fine-tuning parameters like:

• (color, opacity, shininess).
• (zoom, rotation, movement).
• (size, rotation, position).

Popular GUI Libraries for Three.js Some of the most widely used GUI libraries include:

• dat.gui - (Older, but still widely used).
• lil-gui - (Lightweight and modern replacement for dat.gui).
• Tweakpane - (Advanced UI with plugin support).
• Leva (React only) - (Best for React Three.js projects).

Among these, lil-gui is the easiest and most lightweight solution.

lil-gui is a modern, lightweight GUI library designed to replace the older dat.gui. It’s simple to use, highly customizable, and perfect for projects.

Here’s why you should consider using it:

• Lightweight: It won’t bloat your project.
• Easy to Use: The API is straightforward and intuitive.
• Customizable: You can create folders, sliders, color pickers, and more.
• Real-Time Updates: Changes in the GUI instantly reflect in your scene.

In the next lessons, we will learn one by one to see how useful and easy to use the lil-gui