At my new job I’m taking a look at WebGL for various prototype visualisations. Having tried a number of frameworks, I’ve found ThreeJS to be the easiest of them to get up and running quickly.
WebGL cube via ThreeJS
var container, stats;
var camera, scene, renderer;
var cube;
var targetRotationX = 10;
var targetRotationY = 10;
var targetRotationZ = 10;
var targetRotationOnMouseDown = 0;
var mouseX = 0;
var mouseXOnMouseDown = 10;
var mouseY = 0;
var mouseYOnMouseDown = 10;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
$(function() {
init();
animate();
})
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 1000 );
camera.position.y = 150;
camera.position.z = 500;
scene.add( camera );
// LIGHT IN FRONT
var light = new THREE.PointLight( 0xffffff, 2.0 );
light.position.set( 0, 500, 1000 );
light.castShadow = false;
scene.add( light );
var materials = [];
for ( var i = 0; i < 6; i ++ ) {
materials.push( new THREE.MeshPhongMaterial( {
color: 0x9CDB79,
opacity: 0.5,
transparent:true
} ) );
}
cube = new THREE.Mesh( new THREE.CubeGeometry( 200, 200, 200, 1, 1, 1, materials ), new THREE.MeshFaceMaterial() );
cube.position.x = 0;
cube.position.y = 150;
cube.position.z = 0;
cube.rotation.x = 5;
cube.rotation.y = 5;
cube.rotation.z = 5;
cube.doubleSided = true;
cube.flipSided = false;
cube.overdraw = true;
cube.dynamic = false;
cube.overdraw = true;
scene.add( cube );
renderer = new THREE.WebGLRenderer({ antialias: true });
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );
stats = new Stats();
$("#stats").append( stats.domElement )
document.addEventListener( 'mousedown', onDocumentMouseDown, false );
}
function onDocumentMouseDown( event ) {
event.preventDefault();
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
document.addEventListener( 'mouseup', onDocumentMouseUp, false );
document.addEventListener( 'mouseout', onDocumentMouseOut, false );
mouseXOnMouseDown = event.clientX - windowHalfX;
mouseYOnMouseDown = event.clientY - windowHalfY;
targetRotationOnMouseDown = 5;
}
function onDocumentMouseMove( event ) {
mouseX = event.clientX - windowHalfX;
targetRotationY = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.02;
mouseY = event.clientY - windowHalfY;
targetRotationX = targetRotationOnMouseDown + ( mouseY - mouseYOnMouseDown ) * 0.02;
}
function onDocumentMouseUp( event ) {
document.removeEventListener( 'mousemove', onDocumentMouseMove, false );
document.removeEventListener( 'mouseup', onDocumentMouseUp, false );
document.removeEventListener( 'mouseout', onDocumentMouseOut, false );
}
function onDocumentMouseOut( event ) {
document.removeEventListener( 'mousemove', onDocumentMouseMove, false );
document.removeEventListener( 'mouseup', onDocumentMouseUp, false );
document.removeEventListener( 'mouseout', onDocumentMouseOut, false );
}
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
cube.rotation.x += ( targetRotationX - cube.rotation.x ) * 0.05;
cube.rotation.y += ( targetRotationY - cube.rotation.y ) * 0.05;
renderer.render( scene, camera );
}
Click here to view the demo in action.