javascript
/
three.js
镜像来自 https://github.com/tazdij/three.js.git


			
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - postprocessing - depth-of-field</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="http://threejs.org" target="_blank" rel="noopener">three.js</a> - webgl realistic depth-of-field bokeh example<br/>
			shader ported from <a href="http://blenderartists.org/forum/showthread.php?237488-GLSL-depth-of-field-with-bokeh-v2-4-(update)">Martins Upitis</a>
		</div>

		<script type="module">
			import {
				AmbientLight,
				BackSide,
				BoxBufferGeometry,
				BufferGeometryLoader,
				CubeTextureLoader,
				DirectionalLight,
				DoubleSide,
				LinearFilter,
				Mesh,
				MeshPhongMaterial,
				OrthographicCamera,
				PerspectiveCamera,
				PlaneBufferGeometry,
				Raycaster,
				RGBFormat,
				Scene,
				ShaderLib,
				ShaderMaterial,
				SphereBufferGeometry,
				UniformsUtils,
				Vector2,
				Vector3,
				WebGLRenderer,
				WebGLRenderTarget
			} from "../build/three.module.js";

			import Stats from './jsm/libs/stats.module.js';
			import { GUI } from './jsm/libs/dat.gui.module.js';

			import { BokehShader, BokehDepthShader } from './jsm/shaders/BokehShader2.js';

			var container, stats;
			var camera, scene, renderer, materialDepth;

			var windowHalfX = window.innerWidth / 2;
			var windowHalfY = window.innerHeight / 2;

			var postprocessing = { enabled: true };

			var shaderSettings = {
				rings: 3,
				samples: 4
			};

			var mouse = new Vector2();
			var raycaster = new Raycaster();
			var distance = 100;
			var target = new Vector3( 0, 20, - 50 );
			var effectController;
			var planes = [];
			var leaves = 100;

			init();
			animate();

			function init() {

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

				camera = new PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 3000 );

				camera.position.y = 150;
				camera.position.z = 450;

				scene = new Scene();
				scene.add( camera );

				renderer = new WebGLRenderer();
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.autoClear = false;
				container.appendChild( renderer.domElement );

				var depthShader = BokehDepthShader;

				materialDepth = new ShaderMaterial( {
					uniforms: depthShader.uniforms,
					vertexShader: depthShader.vertexShader,
					fragmentShader: depthShader.fragmentShader
				} );

				materialDepth.uniforms[ 'mNear' ].value = camera.near;
				materialDepth.uniforms[ 'mFar' ].value = camera.far;

				// skybox

				var r = 'textures/cube/Bridge2/';
				var urls = [ r + 'posx.jpg', r + 'negx.jpg',
							 r + 'posy.jpg', r + 'negy.jpg',
							 r + 'posz.jpg', r + 'negz.jpg' ];

				var textureCube = new CubeTextureLoader().load( urls );
				textureCube.format = RGBFormat;

				var shader = ShaderLib[ 'cube' ];
				shader.uniforms[ 'tCube' ].value = textureCube;

				var skyMaterial = new ShaderMaterial( {

					fragmentShader: shader.fragmentShader,
					vertexShader: shader.vertexShader,
					uniforms: shader.uniforms,
					depthWrite: false,
					side: BackSide

				} );

				var sky = new Mesh( new BoxBufferGeometry( 1000, 1000, 1000 ), skyMaterial );
				scene.add( sky );

				// plane particles

				var planePiece = new PlaneBufferGeometry( 10, 10, 1, 1 );

				var planeMat = new MeshPhongMaterial( {
					color: 0xffffff * 0.4,
					shininess: 0.5,
					specular: 0xffffff,
					envMap: textureCube,
					side: DoubleSide
				} );

				var rand = Math.random;

				for ( var i = 0; i < leaves; i ++ ) {

					var plane = new Mesh( planePiece, planeMat );
					plane.rotation.set( rand(), rand(), rand() );
					plane.rotation.dx = rand() * 0.1;
					plane.rotation.dy = rand() * 0.1;
					plane.rotation.dz = rand() * 0.1;

					plane.position.set( rand() * 150, 0 + rand() * 300, rand() * 150 );
					plane.position.dx = ( rand() - 0.5 );
					plane.position.dz = ( rand() - 0.5 );
					scene.add( plane );
					planes.push( plane );

				}

				// adding Monkeys

				var loader2 = new BufferGeometryLoader();
				loader2.load( 'models/json/suzanne_buffergeometry.json', function ( geometry ) {

					geometry.computeVertexNormals();

					var material = new MeshPhongMaterial( {
						specular: 0xffffff,
						envMap: textureCube,
						shininess: 50,
						reflectivity: 1.0,
						flatShading: true
					} );

					var monkeys = 20;

					for ( var i = 0; i < monkeys; i ++ ) {

						var mesh = new Mesh( geometry, material );

						mesh.position.z = Math.cos( i / monkeys * Math.PI * 2 ) * 200;
						mesh.position.y = Math.sin( i / monkeys * Math.PI * 3 ) * 20;
						mesh.position.x = Math.sin( i / monkeys * Math.PI * 2 ) * 200;

						mesh.rotation.y = i / monkeys * Math.PI * 2;

						mesh.scale.setScalar( 30 );

						scene.add( mesh );

					}

				} );

				// add balls

				var geometry = new SphereBufferGeometry( 1, 20, 20 );

				for ( var i = 0; i < 20; i ++ ) {

					var ballmaterial = new MeshPhongMaterial( {
						color: 0xffffff * Math.random(),
						shininess: 0.5,
						specular: 0xffffff,
						envMap: textureCube } );

					var mesh = new Mesh( geometry, ballmaterial );

					mesh.position.x = ( Math.random() - 0.5 ) * 200;
					mesh.position.y = Math.random() * 50;
					mesh.position.z = ( Math.random() - 0.5 ) * 200;
					mesh.scale.multiplyScalar( 10 );
					scene.add( mesh );

				}

				// lights

				scene.add( new AmbientLight( 0x222222 ) );

				var directionalLight = new DirectionalLight( 0xffffff, 2 );
				directionalLight.position.set( 2, 1.2, 10 ).normalize();
				scene.add( directionalLight );

				var directionalLight = new DirectionalLight( 0xffffff, 1 );
				directionalLight.position.set( - 2, 1.2, - 10 ).normalize();
				scene.add( directionalLight );

				initPostprocessing();

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

				document.addEventListener( 'mousemove', onDocumentMouseMove, false );
				document.addEventListener( 'touchstart', onDocumentTouchStart, false );
				document.addEventListener( 'touchmove', onDocumentTouchMove, false );

				effectController = {

					enabled: true,
					jsDepthCalculation: true,
					shaderFocus: false,

					fstop: 2.2,
					maxblur: 1.0,

					showFocus: false,
					focalDepth: 2.8,
					manualdof: false,
					vignetting: false,
					depthblur: false,

					threshold: 0.5,
					gain: 2.0,
					bias: 0.5,
					fringe: 0.7,

					focalLength: 35,
					noise: true,
					pentagon: false,

					dithering: 0.0001

				};

				var matChanger = function () {

					for ( var e in effectController ) {

						if ( e in postprocessing.bokeh_uniforms ) {

							postprocessing.bokeh_uniforms[ e ].value = effectController[ e ];

						}

					}

					postprocessing.enabled = effectController.enabled;
					postprocessing.bokeh_uniforms[ 'znear' ].value = camera.near;
					postprocessing.bokeh_uniforms[ 'zfar' ].value = camera.far;
					camera.setFocalLength( effectController.focalLength );

				};

				var gui = new GUI();

				gui.add( effectController, 'enabled' ).onChange( matChanger );
				gui.add( effectController, 'jsDepthCalculation' ).onChange( matChanger );
				gui.add( effectController, 'shaderFocus' ).onChange( matChanger );
				gui.add( effectController, 'focalDepth', 0.0, 200.0 ).listen().onChange( matChanger );

				gui.add( effectController, 'fstop', 0.1, 22, 0.001 ).onChange( matChanger );
				gui.add( effectController, 'maxblur', 0.0, 5.0, 0.025 ).onChange( matChanger );

				gui.add( effectController, 'showFocus' ).onChange( matChanger );
				gui.add( effectController, 'manualdof' ).onChange( matChanger );
				gui.add( effectController, 'vignetting' ).onChange( matChanger );

				gui.add( effectController, 'depthblur' ).onChange( matChanger );

				gui.add( effectController, 'threshold', 0, 1, 0.001 ).onChange( matChanger );
				gui.add( effectController, 'gain', 0, 100, 0.001 ).onChange( matChanger );
				gui.add( effectController, 'bias', 0, 3, 0.001 ).onChange( matChanger );
				gui.add( effectController, 'fringe', 0, 5, 0.001 ).onChange( matChanger );

				gui.add( effectController, 'focalLength', 16, 80, 0.001 ).onChange( matChanger );

				gui.add( effectController, 'noise' ).onChange( matChanger );

				gui.add( effectController, 'dithering', 0, 0.001, 0.0001 ).onChange( matChanger );

				gui.add( effectController, 'pentagon' ).onChange( matChanger );

				gui.add( shaderSettings, 'rings', 1, 8 ).step( 1 ).onChange( shaderUpdate );
				gui.add( shaderSettings, 'samples', 1, 13 ).step( 1 ).onChange( shaderUpdate );

				matChanger();

				window.addEventListener( 'resize', onWindowResize, false );

			}

			function onWindowResize() {

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

				windowHalfX = window.innerWidth / 2;
				windowHalfY = window.innerHeight / 2;

				postprocessing.rtTextureDepth.setSize( window.innerWidth, window.innerHeight );
				postprocessing.rtTextureColor.setSize( window.innerWidth, window.innerHeight );

				postprocessing.bokeh_uniforms[ 'textureWidth' ].value = window.innerWidth;
				postprocessing.bokeh_uniforms[ 'textureHeight' ].value = window.innerHeight;

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

			}

			function onDocumentMouseMove( event ) {

				mouse.x = ( event.clientX - windowHalfX ) / windowHalfX;
				mouse.y = - ( event.clientY - windowHalfY ) / windowHalfY;

				postprocessing.bokeh_uniforms[ 'focusCoords' ].value.set( event.clientX / window.innerWidth, 1 - ( event.clientY / window.innerHeight ) );

			}

			function onDocumentTouchStart( event ) {

				if ( event.touches.length == 1 ) {

					event.preventDefault();

					mouse.x = ( event.touches[ 0 ].pageX - windowHalfX ) / windowHalfX;
					mouse.y = - ( event.touches[ 0 ].pageY - windowHalfY ) / windowHalfY;

				}

			}

			function onDocumentTouchMove( event ) {

				if ( event.touches.length == 1 ) {

					event.preventDefault();

					mouse.x = ( event.touches[ 0 ].pageX - windowHalfX ) / windowHalfX;
					mouse.y = - ( event.touches[ 0 ].pageY - windowHalfY ) / windowHalfY;

				}

			}

			function initPostprocessing() {

				postprocessing.scene = new Scene();

				postprocessing.camera = new OrthographicCamera( window.innerWidth / - 2, window.innerWidth / 2, window.innerHeight / 2, window.innerHeight / - 2, - 10000, 10000 );
				postprocessing.camera.position.z = 100;

				postprocessing.scene.add( postprocessing.camera );

				var pars = { minFilter: LinearFilter, magFilter: LinearFilter, format: RGBFormat };
				postprocessing.rtTextureDepth = new WebGLRenderTarget( window.innerWidth, window.innerHeight, pars );
				postprocessing.rtTextureColor = new WebGLRenderTarget( window.innerWidth, window.innerHeight, pars );

				var bokeh_shader = BokehShader;

				postprocessing.bokeh_uniforms = UniformsUtils.clone( bokeh_shader.uniforms );

				postprocessing.bokeh_uniforms[ 'tColor' ].value = postprocessing.rtTextureColor.texture;
				postprocessing.bokeh_uniforms[ 'tDepth' ].value = postprocessing.rtTextureDepth.texture;
				postprocessing.bokeh_uniforms[ 'textureWidth' ].value = window.innerWidth;
				postprocessing.bokeh_uniforms[ 'textureHeight' ].value = window.innerHeight;

				postprocessing.materialBokeh = new ShaderMaterial( {

					uniforms: postprocessing.bokeh_uniforms,
					vertexShader: bokeh_shader.vertexShader,
					fragmentShader: bokeh_shader.fragmentShader,
					defines: {
						RINGS: shaderSettings.rings,
						SAMPLES: shaderSettings.samples
					}

				} );

				postprocessing.quad = new Mesh( new PlaneBufferGeometry( window.innerWidth, window.innerHeight ), postprocessing.materialBokeh );
				postprocessing.quad.position.z = - 500;
				postprocessing.scene.add( postprocessing.quad );

			}

			function shaderUpdate() {

				postprocessing.materialBokeh.defines.RINGS = shaderSettings.rings;
				postprocessing.materialBokeh.defines.SAMPLES = shaderSettings.samples;
				postprocessing.materialBokeh.needsUpdate = true;

			}

			function animate() {

				requestAnimationFrame( animate, renderer.domElement );

				render();
				stats.update();

			}

			function linearize( depth ) {

				var zfar = camera.far;
				var znear = camera.near;
				return - zfar * znear / ( depth * ( zfar - znear ) - zfar );

			}

			function smoothstep( near, far, depth ) {

				var x = saturate( ( depth - near ) / ( far - near ) );
				return x * x * ( 3 - 2 * x );

			}

			function saturate( x ) {

				return Math.max( 0, Math.min( 1, x ) );

			}

			function render() {

				var time = Date.now() * 0.00015;

				camera.position.x = Math.cos( time ) * 400;
				camera.position.z = Math.sin( time ) * 500;
				camera.position.y = Math.sin( time / 1.4 ) * 100;

				camera.lookAt( target );

				camera.updateMatrixWorld();

				if ( effectController.jsDepthCalculation ) {

					raycaster.setFromCamera( mouse, camera );

					var intersects = raycaster.intersectObjects( scene.children, true );


					if ( intersects.length > 0 ) {

						var targetDistance = intersects[ 0 ].distance;

						distance += ( targetDistance - distance ) * 0.03;

						var sdistance = smoothstep( camera.near, camera.far, distance );

						var ldistance = linearize( 1 - sdistance );

						postprocessing.bokeh_uniforms[ 'focalDepth' ].value = ldistance;

						effectController[ 'focalDepth' ] = ldistance;

					}

				}

				for ( var i = 0; i < leaves; i ++ ) {

					var plane = planes[ i ];
					plane.rotation.x += plane.rotation.dx;
					plane.rotation.y += plane.rotation.dy;
					plane.rotation.z += plane.rotation.dz;
					plane.position.y -= 2;
					plane.position.x += plane.position.dx;
					plane.position.z += plane.position.dz;

					if ( plane.position.y < 0 ) plane.position.y += 300;

				}


				if ( postprocessing.enabled ) {

					renderer.clear();

					// render scene into texture

					renderer.setRenderTarget( postprocessing.rtTextureColor );
					renderer.clear();
					renderer.render( scene, camera );

					// render depth into texture

					scene.overrideMaterial = materialDepth;
					renderer.setRenderTarget( postprocessing.rtTextureDepth );
					renderer.clear();
					renderer.render( scene, camera );
					scene.overrideMaterial = null;

					// render bokeh composite

					renderer.setRenderTarget( null );
					renderer.render( postprocessing.scene, postprocessing.camera );


				} else {

					scene.overrideMaterial = null;

					renderer.setRenderTarget( null );
					renderer.clear();
					renderer.render( scene, camera );

				}

			}

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