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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - physically based shading</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<link type="text/css" rel="stylesheet" href="main.css">
	</head>

	<body>
		<div id="info">
			<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - webgl physically based shading testbed
		</div>

		<script type="module">

			import * as THREE from '../build/three.module.js';

			import Stats from './jsm/libs/stats.module.js';

			import { GUI } from './jsm/libs/dat.gui.module.js';
			import { TrackballControls } from './jsm/controls/TrackballControls.js';
			import { GLTFLoader } from './jsm/loaders/GLTFLoader.js';

			let stats;

			let camera, scene, renderer;

			let mesh;

			let controls;

			let cubeCamera;

			let sunLight, pointLight, ambientLight;

			let mixer;

			const clock = new THREE.Clock();

			let gui, shadowCameraHelper;

			const shadowConfig = {

				shadowCameraVisible: false,
				shadowCameraNear: 750,
				shadowCameraFar: 4000,
				shadowBias: - 0.0002

			};

			init();
			animate();

			function init() {

				const container = document.createElement( 'div' );
				document.body.appendChild( container );

				// CAMERA

				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 2, 10000 );
				camera.position.set( 500, 400, 1200 );

				// SCENE

				scene = new THREE.Scene();
				scene.fog = new THREE.Fog( 0, 1000, 10000 );

				// CUBE CAMERA

				const cubeRenderTarget = new THREE.WebGLCubeRenderTarget( 128, {
					format: THREE.RGBFormat,
					generateMipmaps: true,
					minFilter: THREE.LinearMipmapLinearFilter,
					encoding: THREE.sRGBEncoding
				} );
				cubeCamera = new THREE.CubeCamera( 1, 10000, cubeRenderTarget );

				// TEXTURES
				const textureLoader = new THREE.TextureLoader();

				const textureSquares = textureLoader.load( "textures/patterns/bright_squares256.png" );
				textureSquares.repeat.set( 50, 50 );
				textureSquares.wrapS = textureSquares.wrapT = THREE.RepeatWrapping;
				textureSquares.magFilter = THREE.NearestFilter;
				textureSquares.encoding = THREE.sRGBEncoding;

				const textureNoiseColor = textureLoader.load( "textures/disturb.jpg" );
				textureNoiseColor.repeat.set( 1, 1 );
				textureNoiseColor.wrapS = textureNoiseColor.wrapT = THREE.RepeatWrapping;
				textureNoiseColor.encoding = THREE.sRGBEncoding;

				const textureLava = textureLoader.load( "textures/lava/lavatile.jpg" );
				textureLava.repeat.set( 6, 2 );
				textureLava.wrapS = textureLava.wrapT = THREE.RepeatWrapping;
				textureLava.encoding = THREE.sRGBEncoding;

				// GROUND

				const groundMaterial = new THREE.MeshPhongMaterial( {
					shininess: 80,
					color: 0xffffff,
					specular: 0xffffff,
					map: textureSquares
				} );

				const planeGeometry = new THREE.PlaneGeometry( 100, 100 );

				const ground = new THREE.Mesh( planeGeometry, groundMaterial );
				ground.position.set( 0, 0, 0 );
				ground.rotation.x = - Math.PI / 2;
				ground.scale.set( 1000, 1000, 1000 );
				ground.receiveShadow = true;
				scene.add( ground );

				// MATERIALS

				const materialLambert = new THREE.MeshPhongMaterial( { shininess: 50, color: 0xffffff, map: textureNoiseColor } );
				const materialPhong = new THREE.MeshPhongMaterial( { shininess: 50, color: 0xffffff, specular: 0x999999, map: textureLava } );
				const materialPhongCube = new THREE.MeshPhongMaterial( { shininess: 50, color: 0xffffff, specular: 0x999999, envMap: cubeRenderTarget.texture } );

				// OBJECTS

				const sphereGeometry = new THREE.SphereGeometry( 100, 64, 32 );
				const torusGeometry = new THREE.TorusGeometry( 240, 60, 32, 64 );
				const cubeGeometry = new THREE.BoxGeometry( 150, 150, 150 );

				addObject( torusGeometry, materialPhong, 0, 100, 0, 0 );
				addObject( cubeGeometry, materialLambert, 350, 75, 300, 0 );

				mesh = addObject( sphereGeometry, materialPhongCube, 350, 100, - 350, 0 );
				mesh.add( cubeCamera );

				function addObjectColor( geometry, color, x, y, z, ry ) {

					const material = new THREE.MeshPhongMaterial( { color: 0xffffff } );

					return addObject( geometry, material, x, y, z, ry );

				}

				function addObject( geometry, material, x, y, z, ry ) {

					const tmpMesh = new THREE.Mesh( geometry, material );

					tmpMesh.material.color.offsetHSL( 0.1, - 0.1, 0 );

					tmpMesh.position.set( x, y, z );

					tmpMesh.rotation.y = ry;

					tmpMesh.castShadow = true;
					tmpMesh.receiveShadow = true;

					scene.add( tmpMesh );

					return tmpMesh;

				}

				const bigCube = new THREE.BoxGeometry( 50, 500, 50 );
				const midCube = new THREE.BoxGeometry( 50, 200, 50 );
				const smallCube = new THREE.BoxGeometry( 100, 100, 100 );

				addObjectColor( bigCube, 0xff0000, - 500, 250, 0, 0 );
				addObjectColor( smallCube, 0xff0000, - 500, 50, - 150, 0 );

				addObjectColor( midCube, 0x00ff00, 500, 100, 0, 0 );
				addObjectColor( smallCube, 0x00ff00, 500, 50, - 150, 0 );

				addObjectColor( midCube, 0x0000ff, 0, 100, - 500, 0 );
				addObjectColor( smallCube, 0x0000ff, - 150, 50, - 500, 0 );

				addObjectColor( midCube, 0xff00ff, 0, 100, 500, 0 );
				addObjectColor( smallCube, 0xff00ff, - 150, 50, 500, 0 );

				addObjectColor( new THREE.BoxGeometry( 500, 10, 10 ), 0xffff00, 0, 600, 0, Math.PI / 4 );
				addObjectColor( new THREE.BoxGeometry( 250, 10, 10 ), 0xffff00, 0, 600, 0, 0 );

				addObjectColor( new THREE.SphereGeometry( 100, 32, 26 ), 0xffffff, - 300, 100, 300, 0 );

				// MORPHS

				const loader = new GLTFLoader();

				loader.load( "models/gltf/SittingBox.glb", function ( gltf ) {

					const mesh = gltf.scene.children[ 0 ];

					mixer = new THREE.AnimationMixer( mesh );

					mixer.clipAction( gltf.animations[ 0 ] ).setDuration( 10 ).play();

					const s = 200;
					mesh.scale.set( s, s, s );

					mesh.castShadow = true;
					mesh.receiveShadow = true;

					scene.add( mesh );

				} );

				// LIGHTS

				ambientLight = new THREE.AmbientLight( 0x3f2806 );
				scene.add( ambientLight );

				pointLight = new THREE.PointLight( 0xffaa00, 1, 5000 );
				scene.add( pointLight );

				sunLight = new THREE.DirectionalLight( 0xffffff, 0.3 );
				sunLight.position.set( 1000, 2000, 1000 );
				sunLight.castShadow = true;
				sunLight.shadow.camera.top = 750;
				sunLight.shadow.camera.bottom = - 750;
				sunLight.shadow.camera.left = - 750;
				sunLight.shadow.camera.right = 750;
				sunLight.shadow.camera.near = shadowConfig.shadowCameraNear;
				sunLight.shadow.camera.far = shadowConfig.shadowCameraFar;
				sunLight.shadow.mapSize.set( 1024, 1024 );
				sunLight.shadow.bias = shadowConfig.shadowBias;

				scene.add( sunLight );

				// SHADOW CAMERA HELPER

				shadowCameraHelper = new THREE.CameraHelper( sunLight.shadow.camera );
				shadowCameraHelper.visible = shadowConfig.shadowCameraVisible;
				scene.add( shadowCameraHelper );

				// RENDERER

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				container.appendChild( renderer.domElement );

				//

				renderer.shadowMap.enabled = true;
				renderer.shadowMap.type = THREE.PCFSoftShadowMap;
				renderer.outputEncoding = THREE.sRGBEncoding;

				//

				controls = new TrackballControls( camera, renderer.domElement );
				controls.target.set( 0, 120, 0 );

				controls.rotateSpeed = 1.0;
				controls.zoomSpeed = 1.2;
				controls.panSpeed = 0.8;

				controls.staticMoving = true;

				controls.keys = [ 65, 83, 68 ];


				// STATS

				stats = new Stats();
				container.appendChild( stats.dom );

				// EVENTS

				window.addEventListener( 'resize', onWindowResize );

				// GUI

				gui = new GUI( { width: 400 } );

				// SHADOW

				const shadowGUI = gui.addFolder( "Shadow" );

    		shadowGUI.add( shadowConfig, 'shadowCameraVisible' ).onChange( function () {

					shadowCameraHelper.visible = shadowConfig.shadowCameraVisible;

				} );

				shadowGUI.add( shadowConfig, 'shadowCameraNear', 1, 1500 ).onChange( function () {

					sunLight.shadow.camera.near = shadowConfig.shadowCameraNear;
					sunLight.shadow.camera.updateProjectionMatrix();
					shadowCameraHelper.update();

				} );

				shadowGUI.add( shadowConfig, 'shadowCameraFar', 1501, 5000 ).onChange( function () {

					sunLight.shadow.camera.far = shadowConfig.shadowCameraFar;
					sunLight.shadow.camera.updateProjectionMatrix();
					shadowCameraHelper.update();

				} );

				shadowGUI.add( shadowConfig, 'shadowBias', - 0.01, 0.01 ).onChange( function () {

					sunLight.shadow.bias = shadowConfig.shadowBias;

				} );

				shadowGUI.open();

			}

			//

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

				controls.handleResize();

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				stats.begin();
				render();
				stats.end();

			}

			function render() {

				// update

				const delta = clock.getDelta();

				controls.update();

				if ( mixer ) {

					mixer.update( delta );

				}

				// render cube map

				mesh.visible = false;
				cubeCamera.update( renderer, scene );
				mesh.visible = true;

				// render scene

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>