<!DOCTYPE html>
<html>
<head>
<title></title>
<script src="https://cdn.bootcss.com/three.js/r67/three.js"></script>
<script src="https://cdn.bootcss.com/stats.js/r10/Stats.min.js"></script>
<script type="text/javascript" src="https://cdn.bootcss.com/dat-gui/0.7.3/dat.gui.js"></script>
<style>
body {
margin: 0;
overflow: hidden;
}
</style>
</head>
<body>
<div id="Stats-output">
</div>
<div id="WebGL-output">
</div>
<script type="text/javascript">
//初始化
function init() {
var stats = initStats();
// 创建一个场景
var scene = new THREE.Scene();
// 创建一个相机
var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);
// 创建一个渲染器
var renderer = new THREE.WebGLRenderer();
renderer.setClearColor(new THREE.Color(0xEEEEEE, 1.0));
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.shadowMapEnabled = true;
// 创建一个地板
var planeGeometry = new THREE.PlaneGeometry(600, 200, 20, 20);
var planeMaterial = new THREE.MeshLambertMaterial({color: 0xffffff});
var plane = new THREE.Mesh(planeGeometry, planeMaterial);
plane.receiveShadow = true;
// 让地板保持水平
plane.rotation.x = -0.5 * Math.PI;
plane.position.x = 15;
plane.position.y = -5;
plane.position.z = 0;
// 把地板添加到场景中去
scene.add(plane);
// 创建一个正方体
var cubeGeometry = new THREE.BoxGeometry(4, 4, 4);
var cubeMaterial = new THREE.MeshLambertMaterial({color: 0xff3333});
var cube = new THREE.Mesh(cubeGeometry, cubeMaterial);
cube.castShadow = true;
// 给正方体坐标
cube.position.x = -4;
cube.position.y = 3;
cube.position.z = 0;
// 添加正方体到场景中去
scene.add(cube);
var sphereGeometry = new THREE.SphereGeometry(4, 20, 20);
var sphereMaterial = new THREE.MeshLambertMaterial({color: 0x7777ff});
var sphere = new THREE.Mesh(sphereGeometry, sphereMaterial);
// 正方体坐标
sphere.position.x = 20;
sphere.position.y = 0;
sphere.position.z = 2;
sphere.castShadow = true;
// 把正方体添加到场景中去
scene.add(sphere);
// 设置相机的坐标
camera.position.x = -35;
camera.position.y = 30;
camera.position.z = 25;
camera.lookAt(new THREE.Vector3(10, 0, 0));
// 添加自然光
var ambiColor = "#1c1c1c";
var ambientLight = new THREE.AmbientLight(ambiColor);
scene.add(ambientLight);
var target = new THREE.Object3D();
target.position = new THREE.Vector3(5, 0, 0);
//添加方向光
var pointColor = "#ff5808";
var directionalLight = new THREE.DirectionalLight(pointColor);
directionalLight.position.set(-40, 60, -10);
directionalLight.castShadow = true;
directionalLight.shadowCameraNear = 2;
directionalLight.shadowCameraFar = 200;
directionalLight.shadowCameraLeft = -50;
directionalLight.shadowCameraRight = 50;
directionalLight.shadowCameraTop = 50;
directionalLight.shadowCameraBottom = -50;
directionalLight.distance = 0;
directionalLight.intensity = 0.5;
directionalLight.shadowMapHeight = 1024;
directionalLight.shadowMapWidth = 1024;
scene.add(directionalLight);
// 添加一个小圆形作为光点
var sphereLight = new THREE.SphereGeometry(0.2);
var sphereLightMaterial = new THREE.MeshBasicMaterial({color: 0xac6c25});
var sphereLightMesh = new THREE.Mesh(sphereLight, sphereLightMaterial);
sphereLightMesh.castShadow = true;
sphereLightMesh.position = new THREE.Vector3(3, 20, 3);
scene.add(sphereLightMesh);
// 渲染效果放到DOM元素中去
document.getElementById("WebGL-output").appendChild(renderer.domElement);
var step = 0;
var invert = 1;
var phase = 0;
var controls = new function () {
this.rotationSpeed = 0.03;
this.bouncingSpeed = 0.03;
this.ambientColor = ambiColor;
this.pointColor = pointColor;
this.intensity = 0.5;
this.distance = 0;
this.exponent = 30;
this.angle = 0.1;
this.debug = false;
this.castShadow = true;
this.onlyShadow = false;
this.target = "Plane";
};
var gui = new dat.GUI();
gui.addColor(controls, 'ambientColor').onChange(function (e) {
ambientLight.color = new THREE.Color(e);
});
gui.addColor(controls, 'pointColor').onChange(function (e) {
directionalLight.color = new THREE.Color(e);
});
gui.add(controls, 'intensity', 0, 5).onChange(function (e) {
directionalLight.intensity = e;
});
gui.add(controls, 'distance', 0, 200).onChange(function (e) {
directionalLight.distance = e;
});
gui.add(controls, 'debug').onChange(function (e) {
directionalLight.shadowCameraVisible = e;
});
gui.add(controls, 'castShadow').onChange(function (e) {
directionalLight.castShadow = e;
});
gui.add(controls, 'onlyShadow').onChange(function (e) {
directionalLight.onlyShadow = e;
});
gui.add(controls, 'target', ['Plane', 'Sphere', 'Cube']).onChange(function (e) {
console.log(e);
switch (e) {
case "Plane":
directionalLight.target = plane;
break;
case "Sphere":
directionalLight.target = sphere;
break;
case "Cube":
directionalLight.target = cube;
break;
}
});
render();
function render() {
stats.update();
//旋转正方形
cube.rotation.x += controls.rotationSpeed;
cube.rotation.y += controls.rotationSpeed;
cube.rotation.z += controls.rotationSpeed;
// 滚动球体
step += controls.bouncingSpeed;
sphere.position.x = 20 + ( 10 * (Math.cos(step)));
sphere.position.y = 2 + ( 10 * Math.abs(Math.sin(step)));
sphereLightMesh.position.z = -8;
sphereLightMesh.position.y = +(27 * (Math.sin(step / 3)));
sphereLightMesh.position.x = 10 + (26 * (Math.cos(step / 3)));
directionalLight.position.copy(sphereLightMesh.position);
requestAnimationFrame(render);
renderer.render(scene, camera);
}
function initStats() {
var stats = new Stats();
stats.setMode(0); // 0: fps, 1: ms
stats.domElement.style.position = 'absolute';
stats.domElement.style.left = '0px';
stats.domElement.style.top = '0px';
document.getElementById("Stats-output").appendChild(stats.domElement);
return stats;
}
}
window.onload = init
</script>
</body>
</html>
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