<!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：
总结：
使用光斑效果时要先把Lensflare.js文件加入进来，否则不生效。
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