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but0n/webgl_lights_spotlight.html

Created August 18, 2018 17:54
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webgl_lights_spotlight.html
<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - lights - spotlight</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-color: #000;
margin: 0px;
overflow: hidden;
}
#info {
position: absolute;
top: 0px; width: 100%;
color: #ffffff;
padding: 5px;
font-family: Monospace;
font-size: 13px;
text-align: center;
}
a {
color: #ff0080;
text-decoration: none;
}
a:hover {
color: #0080ff;
}
</style>
</head>
<body>
<div id="info">
<a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - spotlight by <a href="http://master-domain.com" target="_blank" rel="noopener">Master James</a><br />
</div>
<script src="../build/three.js"></script>
<script src="js/controls/OrbitControls.js"></script>
<script src="js/controls/TransformControls.js"></script>
<script src="js/libs/dat.gui.min.js"></script>
<script src="js/Detector.js"></script>
<script>
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
var renderer, scene, camera;
var spotLight, lightHelper, shadowCameraHelper;
var gui;
function init() {
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
renderer.shadowMap.enabled = true;
renderer.shadowMap.type = THREE.PCFSoftShadowMap;
renderer.gammaInput = true;
renderer.gammaOutput = true;
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera( 35, window.innerWidth / window.innerHeight, 1, 1000 );
camera.position.set( 65, 8, - 10 );
var controls = new THREE.OrbitControls( camera, renderer.domElement );
controls.addEventListener( 'change', render );
controls.minDistance = 20;
controls.maxDistance = 500;
controls.enablePan = false;
var ambient = new THREE.AmbientLight( 0xffffff, 0.1 );
scene.add( ambient );
spotLight = new THREE.SpotLight( 0xffffff, 1 );
spotLight.angle = Math.PI / 4;
spotLight.penumbra = 0.05;
spotLight.decay = 2;
spotLight.distance = 200;
spotLight.castShadow = true;
spotLight.shadow.mapSize.width = 1024;
spotLight.shadow.mapSize.height = 1024;
spotLight.shadow.camera.near = 10;
spotLight.shadow.camera.far = 200;
target = new THREE.Object3D();
target.position.set( 0, 0, 0 );
spotLight.target = target;
spotLightGroup = new THREE.Group();
spotLightGroup.name = 'spotLight';
spotLightGroup.position.set( 15, 40, 35 );
spotLightGroup.updateMatrixWorld();
spotLightGroup.add( spotLight );
spotLightGroup.add( target );
scene.add( spotLightGroup );
transControls = new THREE.TransformControls( camera, renderer.domElement );
transControls.setSpace( "local" );
transControls.setMode( "rotate" );
transControls.attach( spotLightGroup )
scene.add( transControls );
lightHelper = new THREE.SpotLightHelper( spotLight );
scene.add( lightHelper );
shadowCameraHelper = new THREE.CameraHelper( spotLight.shadow.camera );
scene.add( shadowCameraHelper );
scene.add( new THREE.AxesHelper( 10 ) );
var material = new THREE.MeshPhongMaterial( { color: 0x808080, dithering: true } );
var geometry = new THREE.PlaneBufferGeometry( 2000, 2000 );
var mesh = new THREE.Mesh( geometry, material );
mesh.position.set( 0, - 1, 0 );
mesh.rotation.x = - Math.PI * 0.5;
mesh.receiveShadow = true;
scene.add( mesh );
var material = new THREE.MeshPhongMaterial( { color: 0x4080ff, dithering: true } );
var geometry = new THREE.BoxBufferGeometry( 3, 1, 2 );
var mesh = new THREE.Mesh( geometry, material );
mesh.position.set( 40, 2, 0 );
mesh.castShadow = true;
scene.add( mesh );
controls.target.copy( mesh.position );
controls.update();
window.addEventListener( 'resize', onResize, false );
}
function onResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
function render() {
lightHelper.update();
shadowCameraHelper.update();
renderer.render( scene, camera );
}
function buildGui() {
gui = new dat.GUI();
var params = {
'light color': spotLight.color.getHex(),
intensity: spotLight.intensity,
distance: spotLight.distance,
angle: spotLight.angle,
penumbra: spotLight.penumbra,
decay: spotLight.decay
}
gui.addColor( params, 'light color' ).onChange( function ( val ) {
spotLight.color.setHex( val );
render();
} );
gui.add( params, 'intensity', 0, 2 ).onChange( function ( val ) {
spotLight.intensity = val;
render();
} );
gui.add( params, 'distance', 50, 200 ).onChange( function ( val ) {
spotLight.distance = val;
render();
} );
gui.add( params, 'angle', 0, Math.PI / 3 ).onChange( function ( val ) {
spotLight.angle = val;
render();
} );
gui.add( params, 'penumbra', 0, 1 ).onChange( function ( val ) {
spotLight.penumbra = val;
render();
} );
gui.add( params, 'decay', 1, 2 ).onChange( function ( val ) {
spotLight.decay = val;
render();
} );
gui.open();
}
init();
buildGui();
render();
</script>
</body>
</html>
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