<!DOCTYPE html> <html lang="en"> <head> <title>three.js misc - lookAt</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 { color: #404040; font-family:Monospace; font-size:13px; text-align:center; background-color: #ffffff; margin: 0px; overflow: hidden; } #info { position: absolute; top: 0px; width: 100%; padding: 5px; } a { color: #0080bb; } </style> </head> <body> <div id="info"><a href="http://threejs.org" target="_blank">three.js</a> - Object3D::lookAt() demo</div> <script src="../build/three.min.js"></script> <script src="js/libs/stats.min.js"></script> <script> var container, stats; var camera, scene, renderer; var mesh, geometry, sphere; var mouseX = 0, mouseY = 0; var windowHalfX = window.innerWidth / 2; var windowHalfY = window.innerHeight / 2; document.addEventListener( 'mousemove', onDocumentMouseMove, false ); init(); animate(); function init() { container = document.createElement( 'div' ); document.body.appendChild( container ); camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 15000 ); camera.position.z = 3200; scene = new THREE.Scene(); sphere = new THREE.Mesh( new THREE.SphereGeometry( 100, 20, 20 ), new THREE.MeshNormalMaterial( { shading: THREE.SmoothShading } ) ); scene.add( sphere ); var geometry = new THREE.CylinderGeometry( 0, 10, 100, 3 ); geometry.applyMatrix( new THREE.Matrix4().makeRotationFromEuler( new THREE.Euler( Math.PI / 2, Math.PI, 0 ) ) ); var material = new THREE.MeshNormalMaterial(); for ( var i = 0; i < 1000; i ++ ) { var mesh = new THREE.Mesh( geometry, material ); mesh.position.x = Math.random() * 4000 - 2000; mesh.position.y = Math.random() * 4000 - 2000; mesh.position.z = Math.random() * 4000 - 2000; mesh.scale.x = mesh.scale.y = mesh.scale.z = Math.random() * 4 + 2; scene.add( mesh ); } scene.matrixAutoUpdate = false; renderer = new THREE.WebGLRenderer( { antialias: true } ); renderer.setClearColor( 0xffffff ); renderer.setPixelRatio( window.devicePixelRatio ); renderer.setSize( window.innerWidth, window.innerHeight ); renderer.sortObjects = false; container.appendChild( renderer.domElement ); stats = new Stats(); stats.domElement.style.position = 'absolute'; stats.domElement.style.top = '0px'; stats.domElement.style.zIndex = 100; container.appendChild( stats.domElement ); // window.addEventListener( 'resize', onWindowResize, false ); } function onWindowResize() { windowHalfX = window.innerWidth / 2; windowHalfY = window.innerHeight / 2; camera.aspect = window.innerWidth / window.innerHeight; camera.updateProjectionMatrix(); renderer.setSize( window.innerWidth, window.innerHeight ); } function onDocumentMouseMove(event) { mouseX = ( event.clientX - windowHalfX ) * 10; mouseY = ( event.clientY - windowHalfY ) * 10; } // function animate() { requestAnimationFrame( animate ); render(); stats.update(); } function render() { var time = Date.now() * 0.0005; sphere.position.x = Math.sin( time * 0.7 ) * 2000; sphere.position.y = Math.cos( time * 0.5 ) * 2000; sphere.position.z = Math.cos( time * 0.3 ) * 2000; for ( var i = 1, l = scene.children.length; i < l; i ++ ) { scene.children[ i ].lookAt( sphere.position ); } camera.position.x += ( mouseX - camera.position.x ) * .05; camera.position.y += ( - mouseY - camera.position.y ) * .05; camera.lookAt( scene.position ); renderer.render( scene, camera ); } </script> </body> </html>