电影后期效果

作者: Codifier | 来源:发表于2019-11-21 11:18 被阅读0次

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Film Post Effect</title>
    <script src="../../three-part/threejs/three.js"></script>
    <script src="../../three-part/threejs/post/EffectComposer.js"></script>
    <script src="../../three-part/threejs/post/FilmPass.js"></script>
    <script src="../../three-part/threejs/post/FilmShader.js"></script>
    <script src="../../three-part/threejs/post/RenderPass.js"></script>
    <script src="../../three-part/threejs/post/ShaderPass.js"></script>
    <script src="../../three-part/threejs/post/CopyShader.js"></script>
    <script src="../../three-part/utils/stats.min.js"></script>
    <script src="../../three-part/utils/dat.gui.min.js"></script>
    <script src="../controls/TrackballControls.js"></script>
    <script src="../util/util.js"></script>
    <style>
        body {
            margin: 0;
            overflow: hidden;
        }
    </style>
</head>
<body>
<div id="container"></div>
<script type="text/javascript">
    init();
    function init() {
        // show FPS
        let stats = initStats();
        // resize
        window.addEventListener('resize', onResize, false);

        let scene = new THREE.Scene();
        let camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);
        camera.position.x = -30;
        camera.position.y = 40;
        camera.position.z = 30;
        camera.lookAt(scene.position);

        let renderer = new THREE.WebGLRenderer();
        renderer.setClearColor(new THREE.Color(0x000000));
        renderer.setSize(window.innerWidth, window.innerHeight);
        renderer.shadowMap.enabled = true;
        document.getElementById("container").appendChild(renderer.domElement);

        // init trackball control
        let trackballControls = initTrackballControls(camera, renderer);
        let clock = new THREE.Clock();

        let textureLoader = new THREE.TextureLoader();

        let sphereMaterial = new THREE.MeshPhongMaterial({
            map: textureLoader.load("../assets/textures/earth/Earth.png"),
            normalMap: textureLoader.load("../assets/textures/earth/EarthNormal.png"),
            specularMap: textureLoader.load("../assets/textures/earth/EarthSpec.png"),
            normalScale: new THREE.Vector2(6,6)
        });

        let sphereGeometry = new THREE.SphereGeometry(10, 50, 50);
        let sphere = new THREE.Mesh(sphereGeometry, sphereMaterial);
        scene.add(sphere);

        let ambientLight = new THREE.AmbientLight(0x343434);
        scene.add(ambientLight);

        let spotLight = new THREE.SpotLight(0xffffff);
        spotLight.position.set(-10, 30, 40);
        spotLight.shadow.mapSize.width = 2048;
        spotLight.shadow.mapSize.height = 2048;
        spotLight.shadow.camera.fov = 15;
        spotLight.castShadow = true;
        spotLight.decay = 2;
        spotLight.penumbra = 0.05;
        scene.add(spotLight);

        let renderPass = new THREE.RenderPass(scene, camera);
        let effectFilm = new THREE.FilmPass(0.8, 0.325, 256, false);

        let composer = new THREE.EffectComposer(renderer);
        composer.addPass(renderPass);
        composer.addPass(effectFilm);

        // attributes which can be modified in GUI
        const controls = {
            "grayScale" : effectFilm.uniforms.grayscale.value,
            "noiseIntensity" : effectFilm.uniforms.nIntensity.value,
            "scanlinesIntensity" : effectFilm.uniforms.sIntensity.value,
            "scanlinesCount" : effectFilm.uniforms.sCount.value
        };
        // init GUI
        initGUI();

        renderScene();

        function initGUI(){
            let gui = new dat.GUI();
            gui.add(controls, "grayScale").onChange(function(e){
                effectFilm.uniforms.grayscale.value = e;
            });
            gui.add(controls, "noiseIntensity", 0, 1, 0.01).onChange(function(e){
                effectFilm.uniforms.nIntensity.value = e;
            });
            gui.add(controls, "scanlinesIntensity", 0, 1, 0.01).onChange(function(e){
                effectFilm.uniforms.sIntensity.value = e;
            });
            gui.add(controls, "scanlinesCount", 0, 500, 1).onChange(function(e){
                effectFilm.uniforms.sCount.value = e;
            });
        }

        function onResize() {
            camera.aspect = window.innerWidth / window.innerHeight;
            camera.updateProjectionMatrix();
            renderer.setSize(window.innerWidth, window.innerHeight);
        }

        function renderScene(){
            trackballControls.update(clock.getDelta());
            stats.update();
            sphere.rotation.y -= 0.01;
            requestAnimationFrame(renderScene);
            composer.render(clock.getDelta());
        }
    }
</script>
</body>
</html>

运行结果：