I am working with three.js right now and have a 3D cube rendered in HTML. The HTML code looks like this:
<div id="render" class="center-block">
<script>
var camera;
var scene;
var renderer;
var mesh;
var geometry;
var material1;
var material2;
var material3;
var material4;
var material5;
var material6;
var materials;
var meshFaceMaterial;
init();
animate();
function init() {
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera( 20, window.innerWidth / window.innerHeight, 0.1, 1000);
camera.position.set( 0, 0, 0 );
var light = new THREE.DirectionalLight( 0xffffff );
light.position.set( 0, 1, 1 ).normalize();
scene.add(light);
geometry = new THREE.CubeGeometry( 10, 10, 10);
material1 = new THREE.MeshPhongMaterial( { map: THREE.ImageUtils.loadTexture('http://vignette1.wikia.nocookie.net/scifiminibuilders/images/8/88/Your_Picture_Here.png/revision/latest?cb=20130507015051') } );
material2 = new THREE.MeshPhongMaterial( { map: THREE.ImageUtils.loadTexture('http://vignette1.wikia.nocookie.net/scifiminibuilders/images/8/88/Your_Picture_Here.png/revision/latest?cb=20130507015051') } );
material3 = new THREE.MeshPhongMaterial( { map: THREE.ImageUtils.loadTexture('http://vignette1.wikia.nocookie.net/scifiminibuilders/images/8/88/Your_Picture_Here.png/revision/latest?cb=20130507015051') } );
material4 = new THREE.MeshPhongMaterial( { map: THREE.ImageUtils.loadTexture('http://vignette1.wikia.nocookie.net/scifiminibuilders/images/8/88/Your_Picture_Here.png/revision/latest?cb=20130507015051') } );
material5 = new THREE.MeshPhongMaterial( { map: THREE.ImageUtils.loadTexture('http://vignette1.wikia.nocookie.net/scifiminibuilders/images/8/88/Your_Picture_Here.png/revision/latest?cb=20130507015051') } );
material6 = new THREE.MeshPhongMaterial( { map: THREE.ImageUtils.loadTexture('http://vignette1.wikia.nocookie.net/scifiminibuilders/images/8/88/Your_Picture_Here.png/revision/latest?cb=20130507015051') } );
materials = [material1, material2, material3, material4, material5, material6];
meshFaceMaterial = new THREE.MeshFaceMaterial( materials );
mesh = new THREE.Mesh(geometry, meshFaceMaterial );
mesh.position.z = -50;
scene.add( mesh );
renderer = new THREE.WebGLRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
document.getElementById('render').appendChild( renderer.domElement );
window.addEventListener( 'resize', onWindowResize, false );
render();
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
render();
}
function animate() {
mesh.rotation.x += .016;
mesh.rotation.y += .015;
mesh.rotation.y += .014;
render();
requestAnimationFrame( animate );
}
function render() {
renderer.render( scene, camera );
}
</script>
</div>
You just need to add a reference to the other .js file. You've already got a reference on your page for THREE.js, I assume. So you can just copy that and reference that second file.
<script src="THREE.js"></script>
<script src="other_script.js"></script>
And put all your extra code into other_script.js (or whatever filename you use).