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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgpu - selective lights</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> webgpu - selective lights<br />
			<b style="color:red">Left: Red lights</b> - <b>Center: All lights</b> - <b style="color:blue">Right: blue light</b>
		</div>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.webgpu.js",
					"three/tsl": "../build/three.webgpu.js",
					"three/addons/": "./jsm/"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three';
			import { rangeFog, color, lights, texture, normalMap } from 'three/tsl';

			import Stats from 'three/addons/libs/stats.module.js';

			import { GUI } from 'three/addons/libs/lil-gui.module.min.js';

			import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
			import { TeapotGeometry } from 'three/addons/geometries/TeapotGeometry.js';

			let camera, scene, renderer,
				light1, light2, light3, light4,
				stats, controls;

			init();

			function init() {

				camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.01, 100 );
				camera.position.z = 7;

				scene = new THREE.Scene();
				scene.fogNode = rangeFog( color( 0xFF00FF ), 12, 30 );

				const sphereGeometry = new THREE.SphereGeometry( 0.1, 16, 8 );

				//textures

				const textureLoader = new THREE.TextureLoader();

				const normalMapTexture = textureLoader.load( './textures/water/Water_1_M_Normal.jpg' );
				normalMapTexture.wrapS = THREE.RepeatWrapping;
				normalMapTexture.wrapT = THREE.RepeatWrapping;

				const alphaTexture = textureLoader.load( './textures/roughness_map.jpg' );
				alphaTexture.wrapS = THREE.RepeatWrapping;
				alphaTexture.wrapT = THREE.RepeatWrapping;

				//lights

				const addLight = ( hexColor, power = 1700, distance = 100 ) => {

					const material = new THREE.MeshStandardNodeMaterial();
					material.colorNode = color( hexColor );
					material.lights = false;

					const mesh = new THREE.Mesh( sphereGeometry, material );

					const light = new THREE.PointLight( hexColor, 1, distance );
					light.power = power;
					light.add( mesh );

					scene.add( light );

					return light;

				};

				light1 = addLight( 0xff0040 );
				light2 = addLight( 0x0040ff );
				light3 = addLight( 0x80ff80 );
				light4 = addLight( 0xffaa00 );

				//light nodes ( selective lights )

				const redLightsNode = lights( [ light1 ] );
				const blueLightsNode = lights( [ light2 ] );

				//models

				const geometryTeapot = new TeapotGeometry( .8, 18 );

				const leftObject = new THREE.Mesh( geometryTeapot, new THREE.MeshStandardNodeMaterial( { color: 0x555555 } ) );
				leftObject.material.lightsNode = redLightsNode;
				leftObject.material.roughnessNode = texture( alphaTexture );
				leftObject.material.metalness = 0;
				leftObject.position.x = - 3;
				scene.add( leftObject );

				const centerObject = new THREE.Mesh( geometryTeapot, new THREE.MeshStandardNodeMaterial( { color: 0x555555 } ) );
				centerObject.material.normalNode = normalMap( texture( normalMapTexture ) );
				centerObject.material.metalness = .5;
				centerObject.material.roughness = .5;
				scene.add( centerObject );

				const rightObject = new THREE.Mesh( geometryTeapot, new THREE.MeshStandardNodeMaterial( { color: 0x555555 } ) );
				rightObject.material.lightsNode = blueLightsNode;
				rightObject.material.metalnessNode = texture( alphaTexture );
				rightObject.position.x = 3;
				scene.add( rightObject );

				leftObject.rotation.y = centerObject.rotation.y = rightObject.rotation.y = Math.PI * - 0.5;
				leftObject.position.y = centerObject.position.y = rightObject.position.y = - 1;

				//renderer

				renderer = new THREE.WebGPURenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.setAnimationLoop( animate );
				document.body.appendChild( renderer.domElement );

				//controls

				controls = new OrbitControls( camera, renderer.domElement );
				controls.minDistance = 3;
				controls.maxDistance = 25;

				//stats

				stats = new Stats();
				document.body.appendChild( stats.dom );

				window.addEventListener( 'resize', onWindowResize );

				//gui

				const gui = new GUI();

				gui.add( centerObject.material, 'roughness', 0, 1, 0.01 );
				gui.add( centerObject.material, 'metalness', 0, 1, 0.01 );

			}

			function onWindowResize() {

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

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

			}

			function animate() {

				const time = performance.now() / 1000;
				const lightTime = time * 0.5;

				light1.position.x = Math.sin( lightTime * 0.7 ) * 3;
				light1.position.y = Math.cos( lightTime * 0.5 ) * 4;
				light1.position.z = Math.cos( lightTime * 0.3 ) * 3;

				light2.position.x = Math.cos( lightTime * 0.3 ) * 3;
				light2.position.y = Math.sin( lightTime * 0.5 ) * 4;
				light2.position.z = Math.sin( lightTime * 0.7 ) * 3;

				light3.position.x = Math.sin( lightTime * 0.7 ) * 3;
				light3.position.y = Math.cos( lightTime * 0.3 ) * 4;
				light3.position.z = Math.sin( lightTime * 0.5 ) * 3;

				light4.position.x = Math.sin( lightTime * 0.3 ) * 3;
				light4.position.y = Math.cos( lightTime * 0.7 ) * 4;
				light4.position.z = Math.sin( lightTime * 0.5 ) * 3;
				/*
				@TODO: Used to test scene light change ( currently unavailable )

				if ( time > 2.0 && light1.parent === null ) scene.add( light1 );
				if ( time > 2.5 && light2.parent === null ) scene.add( light2 );
				if ( time > 3.0 && light3.parent === null ) scene.add( light3 );
				if ( time > 3.5 && light4.parent === null ) scene.add( light4 );
				*/
				renderer.render( scene, camera );

				stats.update();

			}

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