光斑
作者: Codifier | 来源:发表于2019-11-12 09:44 被阅读0次
光斑
光斑
光斑
光斑
光斑
光斑
光斑
光斑天鹅
光斑女孩
许你一生
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Lens Flare</title>
    <script src="../../three-part/threejs/three.js"></script>
    <script src="../../three-part/threejs/Lensflare.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 textureGrass = new THREE.TextureLoader().load("../assets/textures/ground/grasslight-big.jpg");
        textureGrass.wrapS = THREE.RepeatWrapping;
        textureGrass.wrapT = THREE.RepeatWrapping;
        textureGrass.repeat.set(10, 10);

        let planeGeometry = new THREE.PlaneGeometry(1000, 1000, 20, 20);
        let planeMaterial = new THREE.MeshLambertMaterial({
            map: textureGrass
        });
        let plane = new THREE.Mesh(planeGeometry, planeMaterial);
        plane.receiveShadow = true;
        plane.rotation.x = -0.5 * Math.PI;
        plane.position.x = 15;
        plane.position.y = 0;
        plane.position.z = 0;
        scene.add(plane);

        // create a cube
        let cubeGeometry = new THREE.BoxGeometry(4, 4, 4);
        let cubeMaterial = new THREE.MeshLambertMaterial({
            color: 0xff3333
        });
        let cube = new THREE.Mesh(cubeGeometry, cubeMaterial);
        cube.castShadow = true;
        cube.position.x = -4;
        cube.position.y = 3;
        cube.position.z = 0;
        scene.add(cube);

        let sphereGeometry = new THREE.SphereGeometry(4, 25, 25);
        let sphereMaterial = new THREE.MeshLambertMaterial({
            color: 0x7777ff
        });
        let sphere = new THREE.Mesh(sphereGeometry, sphereMaterial);
        sphere.position.x = 10;
        sphere.position.y = 5;
        sphere.position.z = 10;
        sphere.castShadow = true;
        scene.add(sphere);

        let directionalLight = new THREE.DirectionalLight("#ffffff");
        directionalLight.position.set(30, 30, -50);
        directionalLight.castShadow = true;
        directionalLight.intensity = 3;
        directionalLight.target = plane;
        directionalLight.distance = 0;
        directionalLight.shadow.camera.near = 2;
        directionalLight.shadow.camera.far = 200;
        directionalLight.shadow.camera.left = -100;
        directionalLight.shadow.camera.right = 100;
        directionalLight.shadow.camera.top = 100;
        directionalLight.shadow.camera.bottom = -100;
        directionalLight.shadow.mapSize.width = 2048;
        directionalLight.shadow.mapSize.height = 2048;
        scene.add(directionalLight);

        let textureFlare0 = new THREE.TextureLoader().load("../assets/textures/flares/lensflare0.png");
        let textureFlare3 = new THREE.TextureLoader().load("../assets/textures/flares/lensflare3.png");
        let flareColor = new THREE.Color(0xffaacc);

        let lensFlare = new THREE.Lensflare();
        /**
         * LensflareElement( texture : Texture, size : Float, distance : Float, color : Color )
         * texture - THREE.Texture to use for the flare.
         * size - (optional) size in pixels
         * distance - (optional) (0-1) from light source (0 = at light source)
         * color - (optional) the Color of the lens flare
         * @type {THREE.LensflareElement}
         */
        lensFlare.addElement(new THREE.LensflareElement(textureFlare0, 350, 0.0, flareColor));
        lensFlare.addElement(new THREE.LensflareElement(textureFlare3, 60, 0.6, flareColor));
        lensFlare.addElement(new THREE.LensflareElement(textureFlare3, 70, 0.7, flareColor));
        lensFlare.addElement(new THREE.LensflareElement(textureFlare3, 120, 0.9, flareColor));
        lensFlare.addElement(new THREE.LensflareElement(textureFlare3, 70, 1.0, flareColor));
        directionalLight.add(lensFlare);

        // attributes which can be modified in GUI
        const controls = {

        };
        // init GUI
        initGUI();

        renderScene();

        function initGUI(){
            let gui = new dat.GUI();
        }

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

        function renderScene(){
            trackballControls.update(clock.getDelta());
            stats.update();
            requestAnimationFrame(renderScene);
            renderer.render(scene, camera);
        }
    }
</script>
</body>
</html>
运行结果：