Error message: It appears that DAT is not defined when attempting to utilize DAT.gui() within the context

Having some trouble implementing DAT.gui into my code for camera control in three.js

Included the following line in my index.html file.

<script type='text/javascript' src='../_libs/DAT.GUI.min.js'></script>

Made sure to retrieve files from the build folder.

However, when I added the below code snippet to my my.js file:

var gui = new DAT.GUI();
    gui.add(camera.position, 'x', -500,500).step(5);
    gui.add(camera.position, 'y', -500,500).step(5);
    gui.add(camera.position, 'z', 1000,5000).step(5);

An error message popped up saying TypeError: DAT is undefined. Even after attempting to switch to dat.GUI with lowercase letters, the issue persisted. It appears that my.js cannot locate DAT.GUI.min.js, despite being able to find other necessary files. Why might this be happening?

javascriptthree.jsdat.gui

Answer №1

It's supposed to be in lower case like this..

var gui = new dat.GUI();
    gui.add(camera.position, 'x', -500, 500).step(5);
    gui.add(camera.position, 'y', -500, 500).step(5);
    gui.add(camera.position, 'z', 1000, 5000).step(5);

Now in upper case like you did:

var gui = new DAT.GUI();
    gui.add(camera.position, 'x', -500, 500).step(5);
    gui.add(camera.position, 'y', -500, 500).step(5);
    gui.add(camera.position, 'z', 1000, 5000).step(5);

That's why it said DAT is undefined. Hope this helped!

EDIT

Um, I just saw you tried lowercase for dat... Well, the problem here might be with minified versions of JavaScript files. I really don't recommend using min.js... Can you try using .js instead?

EDIT2

This time, can you check by formatting all your code like this:

var params = {
    z: 100
}

gui.add(params, 'z', -500, 500).step(5).onChange(function(value) {
    camera.position.z = value;
});

If that doesn't work, I'll need to see a plunker.

Answer №2

After experiencing a similar problem, I discovered that the order in which I was loading my scripts in the index.html file was causing issues. Specifically, placing the dat.gui library script tag after my main javascript file was causing conflicts. Once I rearranged my script tags so that the dat.gui source was loaded before my main.js source, the issue was resolved.

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