samien
/
three.js
zrcadlo https://github.com/mrdoob/three.js.git


			
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - postprocessing - godrays</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 god-rays example - <a href="https://github.com/Ameobea/three-good-godrays" target="_blank" rel="noopener">three-good-godrays extension</a>
		</div>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.module.js",
					"three/addons/": "./jsm/",
					"postprocessing": "https://unpkg.com/postprocessing@6.38.2/build/index.js",
					"goodrays": "https://unpkg.com/three-good-godrays@0.8.1/build/three-good-godrays.esm.js"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three';

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

			import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
			import { OrbitControls } from 'three/addons/controls/OrbitControls.js';

			import { EffectComposer, RenderPass } from 'postprocessing';
			import { GodraysPass } from 'goodrays';

			let camera, scene, renderer, composer;
			let controls, stats;

			init();

			async function init() {

				camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 0.1, 1000 );
				camera.position.set( - 175, 50, 0 );

				scene = new THREE.Scene();
				scene.background = new THREE.Color( 0x000000 );

				// asset

				const loader = new GLTFLoader();
				const gltf = await loader.loadAsync( 'models/gltf/godrays_demo.glb' );
				scene.add( gltf.scene );

				const pillars = gltf.scene.getObjectByName( 'concrete' );
				pillars.material = new THREE.MeshStandardMaterial( {
					color: 0x333333,
				} );

				const base = gltf.scene.getObjectByName( 'base' );
				base.material = new THREE.MeshStandardMaterial( {
					color: 0x333333,
					side: THREE.DoubleSide,
				} );

				setupBackdrop();

				// lights

				const lightPos = new THREE.Vector3( 0, 50, 0 );
				const lightSphereMaterial = new THREE.MeshBasicMaterial( {
					color: 0xffffff,
				} );
				const lightSphere = new THREE.Mesh( new THREE.SphereGeometry( 0.5, 16, 16 ), lightSphereMaterial );
				lightSphere.position.copy( lightPos );
				scene.add( lightSphere );

				scene.add( new THREE.AmbientLight( 0xcccccc, 0.4 ) );

				const pointLight = new THREE.PointLight( 0xf6287d, 10000 );
				pointLight.castShadow = true;
				pointLight.shadow.bias = - 0.001;
				pointLight.shadow.mapSize.width = 1024;
				pointLight.shadow.mapSize.height = 1024;
				pointLight.position.copy( lightPos );
				scene.add( pointLight );

				// shadow setup

				scene.traverse( obj => {

					if ( obj.isMesh === true ) {

						obj.castShadow = true;
						obj.receiveShadow = true;

					}

				} );

				lightSphere.castShadow = false;
				lightSphere.receiveShadow = false;

				//

				renderer = new THREE.WebGLRenderer();
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.setAnimationLoop( animate );
				renderer.shadowMap.enabled = true;
				document.body.appendChild( renderer.domElement );

				//

				composer = new EffectComposer( renderer, { frameBufferType: THREE.HalfFloatType } );

				const renderPass = new RenderPass( scene, camera );
    			composer.addPass( renderPass );

				const params = {
					density: 1 / 128,
					maxDensity: 0.5,
					edgeStrength: 2,
					edgeRadius: 2,
					distanceAttenuation: 2,
					color: new THREE.Color( 0xf6287d ),
					raymarchSteps: 60,
					blur: true,
					gammaCorrection: true,
				};


				const godraysPass = new GodraysPass( pointLight, camera, params );
				godraysPass.renderToScreen = true;
				composer.addPass( godraysPass );

				//

				controls = new OrbitControls( camera, renderer.domElement );
				controls.target.set( 0, 0.5, 0 );
				controls.enableDamping = true;
				controls.maxDistance = 200;
				controls.update();

				//

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

				//

				window.addEventListener( 'resize', onWindowResize );


			}

			//

			function onWindowResize() {

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

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

			}

			function setupBackdrop() {

				 const backdropDistance = 200;
				// Add backdrop walls `backdropDistance` units away from the origin
				const backdropGeometry = new THREE.PlaneGeometry( 400, 200 );
				const backdropMaterial = new THREE.MeshBasicMaterial( {
					color: 0x200808,
					side: THREE.DoubleSide,
				} );
				const backdropLeft = new THREE.Mesh( backdropGeometry, backdropMaterial );
				backdropLeft.position.set( - backdropDistance, 100, 0 );
				backdropLeft.rotateY( Math.PI / 2 );
				scene.add( backdropLeft );
			
				const backdropRight = new THREE.Mesh( backdropGeometry, backdropMaterial );
				backdropRight.position.set( backdropDistance, 100, 0 );
				backdropRight.rotateY( Math.PI / 2 );
				scene.add( backdropRight );
			
				const backdropFront = new THREE.Mesh( backdropGeometry, backdropMaterial );
				backdropFront.position.set( 0, 100, - backdropDistance );
				scene.add( backdropFront );
			
				const backdropBack = new THREE.Mesh( backdropGeometry, backdropMaterial );
				backdropBack.position.set( 0, 100, backdropDistance );
				scene.add( backdropBack );
			
				const backdropTop = new THREE.Mesh( backdropGeometry, backdropMaterial );
				backdropTop.position.set( 0, 200, 0 );
				backdropTop.rotateX( Math.PI / 2 );
				backdropTop.scale.set( 3, 6, 1 );
				scene.add( backdropTop );

			}

			function animate() {

				controls.update();

				stats.begin();

				composer.render();

				//renderer.render( scene, camera );
			
				stats.end();

			}

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