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webgl_effects_peppersghost.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - effects - peppers ghost</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 {
background: #777;
padding: 0;
margin: 0;
font-weight: bold;
overflow: hidden;
}
#info {
position: absolute;
top: 0px;
width: 100%;
color: #ffffff;
padding: 5px;
font-family: Monospace;
font-size: 13px;
text-align: center;
z-index: 1000;
}
a {
color: #ffffff;
}
#webglmessage a {
color: #da0
}
</style>
</head>
<body>
<div id="info"><a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - <a href="https://en.wikipedia.org/wiki/Pepper%27s_ghost">peppers ghost effect</a> demo <br />
<a href="http://www.instructables.com/id/Reflective-Prism/?ALLSTEPS" target="_blank" rel="noopener">basic instructions for building the reflective prism</a></div>
<script src="../build/three.js"></script>
<script src="js/effects/PeppersGhostEffect.js"></script>
<script src="js/WebGL.js"></script>
<script>
if ( WEBGL.isWebGLAvailable() === false ) {
document.body.appendChild( WEBGL.getWebGLErrorMessage() );
}
var container;
var camera, scene, renderer, effect;
var group;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 1, 100000 );
scene = new THREE.Scene();
group = new THREE.Group();
scene.add( group );
// Cube
var geometry = new THREE.BoxBufferGeometry( 1, 1, 1 );
geometry = geometry.toNonIndexed(); // ensure unique vertices for each triangle
var position = geometry.attributes.position;
var colors = [];
var color = new THREE.Color();
// generate for each side of the cube a different color
for ( var i = 0; i < position.count; i += 6 ) {
color.setHex( Math.random() * 0xffffff );
// first face
colors.push( color.r, color.g, color.b );
colors.push( color.r, color.g, color.b );
colors.push( color.r, color.g, color.b );
// second face
colors.push( color.r, color.g, color.b );
colors.push( color.r, color.g, color.b );
colors.push( color.r, color.g, color.b );
}
geometry.addAttribute( 'color', new THREE.Float32BufferAttribute( colors, 3 ) );
var material = new THREE.MeshBasicMaterial( { vertexColors: THREE.VertexColors } );
for ( var i = 0; i < 10; i ++ ) {
var cube = new THREE.Mesh( geometry, material );
cube.position.x = Math.random() * 2 - 1;
cube.position.y = Math.random() * 2 - 1;
cube.position.z = Math.random() * 2 - 1;
cube.scale.multiplyScalar( Math.random() + 0.5 );
group.add( cube );
}
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
container.appendChild( renderer.domElement );
effect = new THREE.PeppersGhostEffect( renderer );
effect.setSize( window.innerWidth, window.innerHeight );
effect.cameraDistance = 5;
window.addEventListener( 'resize', onWindowResize, false );
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
effect.setSize( window.innerWidth, window.innerHeight );
}
function animate() {
requestAnimationFrame( animate );
render();
}
function render() {
group.rotation.y += 0.01;
effect.render( scene, camera );
}
</script>
</body>
</html>