Three 光源和外部光3-投影 - W3xue在线HTML/CSS/JS运行工具

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <style>
    body {
      margin: 0;
      overflow: hidden;
      /* 隐藏body窗口区域滚动条 */
    }
  </style>
  
  <script src="/js/threejs/threer92.js"></script>
  <script src="/example/threejs/solarsystem/files/OrbitControls.js"></script>
</head>

<body>
  <script>
	//创建场景
    var scene = new THREE.Scene();

var geometry = new THREE.BoxGeometry(40, 100, 40);
var material = new THREE.MeshLambertMaterial({
  color: 0x0000ff
});
var mesh = new THREE.Mesh(geometry, material);
// mesh.position.set(0,0,0)
scene.add(mesh);

// 设置产生投影的网格模型
mesh.castShadow = true;

//创建一个平面几何体作为投影面
var planeGeometry = new THREE.PlaneGeometry(300, 300);
var planeMaterial = new THREE.MeshLambertMaterial({
  color: 0x999999
});
// 平面网格模型作为投影面
var planeMesh = new THREE.Mesh(planeGeometry, planeMaterial);
scene.add(planeMesh); //网格模型添加到场景中
planeMesh.rotateX(-Math.PI / 2); //旋转网格模型
planeMesh.position.y = -50; //设置网格模型y坐标
// 设置接收阴影的投影面
planeMesh.receiveShadow = true;

// 方向光
var directionalLight = new THREE.DirectionalLight(0xffffff, 1);
// 设置光源位置
directionalLight.position.set(60, 100, 40);
scene.add(directionalLight);
// 设置用于计算阴影的光源对象
directionalLight.castShadow = true;
// 设置计算阴影的区域，最好刚好紧密包围在对象周围
// 计算阴影的区域过大：模糊  过小：看不到或显示不完整
directionalLight.shadow.camera.near = 0.5;
directionalLight.shadow.camera.far = 300;
directionalLight.shadow.camera.left = -50;
directionalLight.shadow.camera.right = 50;
directionalLight.shadow.camera.top = 200;
directionalLight.shadow.camera.bottom = -100;
// 设置mapSize属性可以使阴影更清晰，不那么模糊
// directionalLight.shadow.mapSize.set(1024,1024)
console.log(directionalLight.shadow.camera);
	  
	  // 聚光光源
var spotLight = new THREE.SpotLight(0xffffff);
// 设置聚光光源位置
spotLight.position.set(50, 90, 50);
// 设置聚光光源发散角度
spotLight.angle = Math.PI /6
scene.add(spotLight); //光对象添加到scene场景中
// 设置用于计算阴影的光源对象
spotLight.castShadow = true;
// 设置计算阴影的区域，注意包裹对象的周围
spotLight.shadow.camera.near = 1;
spotLight.shadow.camera.far = 300;
spotLight.shadow.camera.fov = 20;
	  
	 
	  
	//添加坐标系
	var axisHelper = new THREE.AxisHelper(350);
	scene.add(axisHelper);

/**
     * 相机设置
     */
    var width = window.innerWidth; //窗口宽度
    var height = window.innerHeight; //窗口高度
    var k = width / height; //窗口宽高比
    var s = 200; //三维场景显示范围控制系数，系数越大，显示的范围越大
    //创建相机对象
    var camera = new THREE.OrthographicCamera(-s * k, s * k, s, -s, 1, 1000);
    camera.position.set(200, 300, 200); //设置相机位置
    camera.lookAt(scene.position); //设置相机方向(指向的场景对象)
    /**
     * 创建渲染器对象
     */
    var renderer = new THREE.WebGLRenderer();
    renderer.shadowMap.enabled = true; //设置渲染阴影，重要！
    renderer.setSize(width, height);//设置渲染区域尺寸
    renderer.setClearColor(0xb9d3ff, 1); //设置背景颜色
    document.body.appendChild(renderer.domElement); //body元素中插入canvas对象
    //执行渲染操作   指定场景、相机作为参数
    renderer.render(scene, camera);

let T0 = new Date();//上次时间
function render() {
        let T1 = new Date();//本次时间
        let t = T1-T0;//时间差
        T0 = T1;//把本次时间赋值给上次时间
        requestAnimationFrame(render);
        renderer.render(scene,camera);//执行渲染操作
        //mesh1.rotateY(0.001*t);//旋转角速度0.001弧度每毫秒
    }
render();
	  
var controls = new THREE.OrbitControls(camera,renderer.domElement);//创建控件对象

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

​x
 
<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <style>
    body {
      margin: 0;
      overflow: hidden;
      /* 隐藏body窗口区域滚动条 */
    }
  </style>
  <!--引入three.js三维引擎-->
  <script src="/js/threejs/threer92.js"></script>
  <script src="/example/threejs/solarsystem/files/OrbitControls.js"></script>
</head>
​
<body>
  <script>
    //创建场景
    var scene = new THREE.Scene();
​
    
      var geometry = new THREE.BoxGeometry(40, 100, 40);
var material = new THREE.MeshLambertMaterial({
  color: 0x0000ff
});
var mesh = new THREE.Mesh(geometry, material);
// mesh.position.set(0,0,0)
scene.add(mesh);
​
// 设置产生投影的网格模型
mesh.castShadow = true;
​
​
//创建一个平面几何体作为投影面
var planeGeometry = new THREE.PlaneGeometry(300, 300);
var planeMaterial = new THREE.MeshLambertMaterial({
  color: 0x999999
});
// 平面网格模型作为投影面
var planeMesh = new THREE.Mesh(planeGeometry, planeMaterial);
scene.add(planeMesh); //网格模型添加到场景中
planeMesh.rotateX(-Math.PI / 2); //旋转网格模型
planeMesh.position.y = -50; //设置网格模型y坐标
// 设置接收阴影的投影面
planeMesh.receiveShadow = true;
​
// 方向光