【前端知识】Three 学习日志（五）—

【前端知识】Three 学习日志（五）—— 点光源辅助观察

news2024/10/1 23:45:59

Three 学习日志（五）—— 点光源辅助观察

一、引入点光源辅助观察

// 光源辅助观察
const pointLightHelper = new THREE.PointLightHelper(pointLight, 10);
scene.add(pointLightHelper);

在这里插入图片描述

二、改变点光源位置

// 点光源位置
pointLight.position.set(200, 200, 200);
// 改变点光源位置
pointLight.position.set(-100, -100, -100);
scene.add(pointLight); //点光源添加到场景中

在这里插入图片描述

三、完整代码

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Learn Three</title>
    <!-- 引入three，下载地址参考：http://www.webgl3d.cn/pages/aac9ab/#%E7%89%B9%E5%AE%9A%E7%89%88%E6%9C%ACthree-js%E6%96%87%E4%BB%B6%E5%8C%85%E4%B8%8B%E8%BD%BD -->
    <script src="../build/three.js"></script>
    <!-- 引入相机控件 -->
    <script type="importmap">
        {
            "imports": {
                "three": "../build/three.module.js",
                "three/addons/": "../examples/jsm/"
            }
        }
    </script>
</head>

<body>
    <script type="module">
        // 引入轨道控制器扩展库OrbitControls.js
        import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
        // 创建3D场景对象Scene
        const scene = new THREE.Scene();
        const axesHelper = new THREE.AxesHelper(150);
        scene.add(axesHelper);
        const geometry = new THREE.BoxGeometry(100, 100, 100);
        const material = new THREE.MeshLambertMaterial();
        const pointLight = new THREE.PointLight(0xffffff, 1.0);

        // 点光源位置
        pointLight.position.set(200, 200, 200);
        // 改变点光源位置
        pointLight.position.set(-100, -100, -100);
        scene.add(pointLight); //点光源添加到场景中
        // 光源辅助观察
        const pointLightHelper = new THREE.PointLightHelper(pointLight, 10);
        scene.add(pointLightHelper);

        const mesh = new THREE.Mesh(geometry, material); //网格模型对象Mesh
        mesh.position.set(0, 0, 0);
        scene.add(mesh);
        const camera = new THREE.PerspectiveCamera();
        camera.position.set(200, 200, 200);
        camera.lookAt(0, 0, 0);
        const width = 800; //宽度
        const height = 500; //高度
        const renderer = new THREE.WebGLRenderer();
        renderer.setSize(width, height);
        renderer.render(scene, camera); //执行渲染操作
        document.body.appendChild(renderer.domElement);
        // 设置相机控件轨道控制器
        const controls = new OrbitControls(camera, renderer.domElement);
        // 如果OrbitControls改变了相机参数，重新调用渲染器渲染三维场景
        controls.addEventListener('change', function () {
            renderer.render(scene, camera); //执行渲染操作
        });//监听鼠标、键盘事件

    </script>
</body>

</html>