10-raycaster-select-click.html
<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - raycaster</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<style>
body {
margin: 0px;
overflow: hidden;
}
</style>
<script src="../frameworks/three.js"></script>
<script src="../frameworks/stats.js"></script>
</head>
<body>
<script>
var container, stats;
var camera, scene, raycaster, renderer;
var mouse = new THREE.Vector2(), SELECTED;
var radius = 100, theta = 0;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 10000 );
scene = new THREE.Scene();
var light = new THREE.DirectionalLight( 0xffffff, 1 );
light.position.set( 1, 1, 1 ).normalize();
scene.add( light );
var geometry = new THREE.BoxBufferGeometry( 20, 20, 20 );
for ( var i = 0; i < 1000; i ++ ) {
var grey=Math.random();
var object = new THREE.Mesh( geometry, new THREE.MeshLambertMaterial( { color: new THREE.Color( grey, grey , grey ) } ) );
object.position.x = Math.random() * 800 - 400;
object.position.y = Math.random() * 800 - 400;
object.position.z = Math.random() * 800 - 400;
object.rotation.x = Math.random() * 2 * Math.PI;
object.rotation.y = Math.random() * 2 * Math.PI;
object.rotation.z = Math.random() * 2 * Math.PI;
object.scale.x = Math.random() + 0.5;
object.scale.y = Math.random() + 0.5;
object.scale.z = Math.random() + 0.5;
scene.add( object );
}
renderer = new THREE.WebGLRenderer();
renderer.setClearColor( 0xf0f0f0 );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.sortObjects = false;
container.appendChild(renderer.domElement);
stats = new Stats();
container.appendChild( stats.dom );
raycaster = new THREE.Raycaster();
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
container.addEventListener( 'mousedown', onDocumentMouseDown, false );
window.addEventListener( 'resize', onWindowResize, false );
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
function onDocumentMouseMove( event ) {
event.preventDefault();
mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
mouse.y = - ( event.clientY / window.innerHeight ) * 2 + 1;
}
function onDocumentMouseDown( event ) {
event.preventDefault();
if ( SELECTED ){
SELECTED.currentHex = 0x00ff00*Math.random();
SELECTED.material.emissive.setHex( SELECTED.currentHex );
}
}
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
// find intersections
raycaster.setFromCamera( mouse, camera );
var intersects = raycaster.intersectObjects( scene.children );
if ( intersects.length > 0 ) {
if ( SELECTED != intersects[ 0 ].object ) {
if ( SELECTED ) SELECTED.material.emissive.setHex( SELECTED.currentHex );
SELECTED = intersects[ 0 ].object;
SELECTED.currentHex = SELECTED.material.emissive.getHex();
SELECTED.material.emissive.setHex( 0xff0000 );
container.style.cursor = 'pointer';
}
} else {
if ( SELECTED ) {
SELECTED.material.emissive.setHex( SELECTED.currentHex );
SELECTED = null;
container.style.cursor = 'auto';
}
}
renderer.render( scene, camera );
}
</script>
</body>
</html>