javascript
/
three.js
zrcadlo https://github.com/tazdij/three.js.git


			
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - lights - spot light</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="container"></div>
		<div id="info">
			<a href="http://threejs.org" target="_blank">three.js</a> - Just to show the spot light and it's edge - by <a href="http://master-domain.com" target="_blank">Master James</a><br />
			Right click and drag to move OrbitControls, center across the edge of the shadow.<br />
			Click to set random color CTRL-Click for White.<br />
		</div>

		<script src="../build/three.js"></script>
		<script src="../examples/js/libs/dat.gui.min.js"></script>
		<script src="../examples/js/controls/OrbitControls.js"></script>
		<script src="js/Detector.js"></script>

		<script>
			var container = document.getElementById( 'container' );

			if ( ! Detector.webgl ) Detector.addGetWebGLMessage();

			var rnd = new THREE.WebGLRenderer();
			var cam = new THREE.PerspectiveCamera(34, window.innerWidth / window.innerHeight, 0.1, 20000);
			var orb = new THREE.OrbitControls(cam, rnd.domElement);

			var scn = new THREE.Scene();
			var matFloor = new THREE.MeshPhongMaterial();
			var matBox = new THREE.MeshPhongMaterial();
			var geoFloor = new THREE.BoxGeometry(2000, 0.1, 2000);
			var geoBox = new THREE.BoxGeometry(Math.PI, Math.sqrt(2), Math.E);
			var mshFloor = new THREE.Mesh(geoFloor, matFloor);
			var mshBox = new THREE.Mesh(geoBox, matBox);
			var amb = new THREE.AmbientLight(0x121422);
			var spt = new THREE.SpotLight(0xFFFFFF);
			var lightHelper;
			var ray = new THREE.Raycaster();
			var mouseDown = new THREE.Vector2();
			var mouse = new THREE.Vector2();


			var gui, guiElements, param = { color: '0xffffff' };

			function init() {
				rnd.shadowMap.enabled = true;
				rnd.shadowMap.type = THREE.PCFSoftShadowMap;
				rnd.gammaInput = true;
				rnd.gammaOutput = true;
				rnd.antialias = true;
				rnd.domElement.addEventListener('mousedown', onDocumentClick);
				rnd.domElement.addEventListener('mouseup', onDocumentClick);

				cam.position.set(65, 8, -10);

				spt.position.set(15, 40, 35);
				spt.castShadow = true;
				spt.angle = 0.75;
				spt.exponent = 2.0;
				spt.penumbra = 0.05;
				spt.decay = 2;
				spt.distance = 500;
				spt.shadow.mapSize.width = 8192;
				spt.shadow.mapSize.height = 8192;
				// shadow camera helper
				spt.shadowCameraHelper = new THREE.CameraHelper( spt.shadow.camera ); // colored lines
				spt.shadow.camera.near = 0.1;
				spt.shadow.camera.far = 20000;
				//spt.shadow.camera.fov = (spt.angle * (360 / Math.PI));

				lightHelper = new THREE.SpotLightHelper( spt );

				matFloor.color.set( 0x808080 );
				randomColor( matBox );

				mshFloor.receiveShadow = true;
				mshFloor.position.set(0, -0.05, 0);

				mshBox.castShadow = true;
				mshBox.receiveShadow = true;
				mshBox.position.set(40, 1.8, 0);

				scn.add(cam);
				scn.add(mshFloor);
				scn.add(mshBox);
				scn.add(amb);
				scn.add(spt);
				scn.add( spt.shadowCameraHelper );
				scn.add( new THREE.AxisHelper( 10 ) );
				scn.add( lightHelper );

				document.body.appendChild(rnd.domElement);
				onResize();
				window.addEventListener('resize', onResize, false);

				orb.addEventListener('change', render);
				//orb.maxPolarAngle = (Math.PI / 2);
				orb.update();
			}

			function onResize() {
				rnd.setSize(window.innerWidth, window.innerHeight);
				cam.aspect = (window.innerWidth / window.innerHeight);
				cam.updateProjectionMatrix();
				orb.target = mshBox.position;
			}

			function render() {
				lightHelper.update(); // required
				if ( spt.shadowCameraHelper ) spt.shadowCameraHelper.update();

				rnd.render(scn, cam);
			}

			function clearGui() {
				if ( gui ) gui.destroy();

				gui = new dat.GUI();

				gui.width = 178;
				
				var gStyle = gui.domElement.style;
				
				gStyle.position = "absolute";
				
				gStyle.top = "48px";
				
				gStyle.height = "220px";

				gui.open();
			}

			function buildGui() {

				clearGui();

				addGui( 'light color', spt.color.getHex(), function( val ) {
					spt.color.setHex( val );
					render();
				}, true );

				addGui( 'intensity', spt.intensity, function( val ) {
					spt.intensity = val;
					render();
				}, false, 0, 10 );

				addGui( 'distance', spt.distance, function( val ) {
					spt.distance = val;
					render();
				}, false, 0, 1000 );

				addGui( 'angle', spt.angle, function( val ) {
					spt.angle = val;
					render();
				}, false, 0, 1.56 );

				addGui( 'penumbra', spt.penumbra, function( val ) {
					spt.penumbra = val;
					render();
				}, false, 0, 1 );

				addGui( 'decay', spt.decay, function( val ) {
					spt.decay = val;
					render();
				}, false, 0, 100 );

			}

			function addGui( name, value, callback, isColor, min, max ) {
				var node;
				param[ name ] = value;
				if ( isColor ) {
					node = gui.addColor( param, name ).onChange( function() {
						callback( param[ name ] );
					} );
				}
				else if ( typeof value == 'object' ) {
					node = gui.add( param, name, value ).onChange( function() {
						callback( param[ name ] );
					} );
				}
				else {
					node = gui.add( param, name, min, max ).onChange( function() {
						callback( param[ name ] );
					} );
				}
				return node;
			}

			function onDocumentClick( event ) {

				event.preventDefault();

				var rndDom = rnd.domElement;

				if( event.type === 'mousedown' ) {

					mouseDown.x = ( event.clientX / rndDom.clientWidth ) * 2 - 1;
					
					mouseDown.y = - ( event.clientY / rndDom.clientHeight ) * 2 + 1;

				}
				else {

					mouse.x = ( event.clientX / rndDom.clientWidth ) * 2 - 1;

					mouse.y = - ( event.clientY / rndDom.clientHeight ) * 2 + 1;

					if (mouseDown.distanceTo(mouse) < 0.0075) {

						ray.setFromCamera( mouse, cam );

						var found = ray.intersectObjects( [ mshBox, mshFloor ] );

						if ( found.length > 0 ) {

							if( event.ctrlKey === false ) randomColor( found[0].object );

							else found[0].object.material.color.set( 0xffffff );

							render();
							
						}

					}

				}

			}

			function randomColor( target ) {

				if ( target !== undefined ) {

					if ( target.material !== undefined ) target = target.material;

					if ( target.color !== undefined ) {

						target.color.setHex( 0xffffff * Math.random() );

					}
				}

			}

			init();

			buildGui();

			render();

		</script>
	</body>
</html>