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webgl_camera.html
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<!doctype html>
<html lang="en">
<head>
<title>three.js webgl - cameras</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: #808080;
font-family:Monospace;
font-size:13px;
text-align:center;
background-color: #000;
margin: 0px;
overflow: hidden;
}
#info {
position: absolute;
top: 0px; width: 100%;
padding: 5px;
z-index: 100;
}
a {
color: #0080ff;
}
b { color: lightgreen }
</style>
</head>
<body>
<div id="container"></div>
<div id="info"><a href="http://github.com/mrdoob/three.js" target="_blank">three.js</a> - cameras<br/>
<b>O</b> orthographic <b>P</b> perspective
</div>
<script src="../build/Three.js"></script>
<script src="js/Stats.js"></script>
<script>
var SCREEN_WIDTH = window.innerWidth;
var SCREEN_HEIGHT = window.innerHeight;
var container, stats;
var camera, scene, renderer, mesh;
var cameraRig, activeCamera;
var cameraPerspective, cameraOrtho;
var cameraPerspectiveHelper, cameraOrthoHelper;
var r = 0;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
scene = new THREE.Scene();
//
camera = new THREE.PerspectiveCamera( 50, 0.5 * SCREEN_WIDTH / SCREEN_HEIGHT, 1, 10000 );
camera.position.z = 2500;
scene.add( camera );
cameraPerspective = new THREE.PerspectiveCamera( 50, 0.5 * SCREEN_WIDTH / SCREEN_HEIGHT, 150, 1000 );
cameraPerspectiveHelper = new THREE.CameraHelper( cameraPerspective );
cameraPerspective.add( cameraPerspectiveHelper );
//
cameraOrtho = new THREE.OrthographicCamera( 0.5 * SCREEN_WIDTH / - 2, 0.5 * SCREEN_WIDTH / 2, SCREEN_HEIGHT / 2, SCREEN_HEIGHT / - 2, 150, 1000 );
cameraOrthoHelper = new THREE.CameraHelper( cameraOrtho );
cameraOrtho.add( cameraOrthoHelper );
//
activeCamera = cameraPerspective;
// counteract different front orientation of cameras vs rig
cameraOrtho.rotation.y = Math.PI;
cameraPerspective.rotation.y = Math.PI;
cameraRig = new THREE.Object3D();
cameraRig.add( cameraPerspective );
cameraRig.add( cameraOrtho );
scene.add( cameraRig );
//
mesh = new THREE.Mesh( new THREE.SphereGeometry( 100, 16, 8 ), new THREE.MeshBasicMaterial( { color: 0xffffff, wireframe: true } ) );
scene.add( mesh );
var mesh2 = new THREE.Mesh( new THREE.SphereGeometry( 50, 16, 8 ), new THREE.MeshBasicMaterial( { color: 0x00ff00, wireframe: true } ) );
mesh2.position.y = 150;
mesh.add( mesh2 );
var mesh3 = new THREE.Mesh( new THREE.SphereGeometry( 5, 16, 8 ), new THREE.MeshBasicMaterial( { color: 0x0000ff, wireframe: true } ) );
mesh3.position.z = 150;
cameraRig.add( mesh3 );
//
var geometry = new THREE.Geometry();
for ( var i = 0; i < 10000; i ++ ) {
var vertex = new THREE.Vector3();
vertex.x = THREE.Math.randFloatSpread( 2000 );
vertex.y = THREE.Math.randFloatSpread( 2000 );
vertex.z = THREE.Math.randFloatSpread( 2000 );
geometry.vertices.push( vertex );
}
var particles = new THREE.ParticleSystem( geometry, new THREE.ParticleBasicMaterial( { color: 0x888888 } ) );
scene.add( particles );
//
renderer = new THREE.WebGLRenderer( { antialias: true, clearColor: 0x000000, clearAlpha: 1 } );
renderer.setSize( SCREEN_WIDTH, SCREEN_HEIGHT );
renderer.domElement.style.position = "relative";
container.appendChild( renderer.domElement );
renderer.autoClear = false;
//
stats = new Stats();
stats.domElement.style.position = 'absolute';
stats.domElement.style.top = '0px';
stats.domElement.style.zIndex = 100;
stats.domElement.children[ 0 ].children[ 0 ].style.color = "#666";
stats.domElement.children[ 0 ].style.background = "transparent";
stats.domElement.children[ 0 ].children[ 1 ].style.display = "none";
container.appendChild( stats.domElement );
//
window.addEventListener( 'resize', onWindowResize, false );
document.addEventListener( 'keydown', onKeyDown, false );
}
//
function onKeyDown ( event ) {
switch( event.keyCode ) {
case 79: /*O*/ activeCamera = cameraOrtho; break;
case 80: /*P*/ activeCamera = cameraPerspective; break;
}
};
//
function onWindowResize( event ) {
SCREEN_WIDTH = window.innerWidth;
SCREEN_HEIGHT = window.innerHeight;
renderer.setSize( SCREEN_WIDTH, SCREEN_HEIGHT );
camera.aspect = 0.5 * SCREEN_WIDTH / SCREEN_HEIGHT;
camera.updateProjectionMatrix();
cameraPerspective.aspect = 0.5 * SCREEN_WIDTH / SCREEN_HEIGHT;
cameraPerspective.updateProjectionMatrix();
cameraOrtho.left = - 0.5 * SCREEN_WIDTH / 2;
cameraOrtho.right = 0.5 * SCREEN_WIDTH / 2;
cameraOrtho.top = SCREEN_HEIGHT / 2;
cameraOrtho.bottom = - SCREEN_HEIGHT / 2;
cameraOrtho.updateProjectionMatrix();
}
//
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
mesh.position.x = 700 * Math.cos( r );
mesh.position.z = 700 * Math.sin( r );
mesh.position.y = 700 * Math.sin( r );
mesh.children[ 0 ].position.x = 70 * Math.cos( 2 * r );
mesh.children[ 0 ].position.z = 70 * Math.sin( r );
if ( activeCamera === cameraPerspective ) {
cameraPerspective.fov = 35 + 30 * Math.sin( 0.5 * r );
cameraPerspective.far = mesh.position.length();
cameraPerspective.updateProjectionMatrix();
cameraPerspectiveHelper.update();
cameraPerspectiveHelper.lines.visible = true;
cameraOrthoHelper.lines.visible = false;
} else {
cameraOrtho.far = mesh.position.length();
cameraOrtho.updateProjectionMatrix();
cameraOrthoHelper.update();
cameraOrthoHelper.lines.visible = true;
cameraPerspectiveHelper.lines.visible = false;
}
cameraRig.lookAt( mesh.position );
renderer.clear();
renderer.setViewport( 0, 0, SCREEN_WIDTH/2, SCREEN_HEIGHT );
renderer.render( scene, activeCamera );
renderer.setViewport( SCREEN_WIDTH/2, 0, SCREEN_WIDTH/2, SCREEN_HEIGHT );
renderer.render( scene, camera );
r += 0.01;
}
</script>
</body>
</html>