mirror of
https://github.com/jiawanlong/Cesium-Examples.git
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109 lines
3.4 KiB
HTML
109 lines
3.4 KiB
HTML
<!--********************************************************************
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* by jiawanlong
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*********************************************************************-->
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8" />
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<style>
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* {
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margin: 0;
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padding: 0;
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overflow: hidden;
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}
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</style>
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</head>
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<body>
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<script type="importmap">
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{
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"imports": {
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"three": "./../../libs/three/build/three.module.js",
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"three/addons/": "./../../libs/three/examples/jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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const scene = new THREE.Scene();
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// 网格模型Mesh其实就一个一个三角形(面)拼接构成
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const geometry = new THREE.BufferGeometry();
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const vertices = new Float32Array([
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0, 0, 0,
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50, 0, 0,
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50, 0, 50,
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0, 0, 0,
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0, 0, 50,
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50, 0, 50,
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]);
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geometry.attributes.position = new THREE.BufferAttribute(vertices, 3);
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// 点渲染模式
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const material2 = new THREE.PointsMaterial({
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color: 0xffff00,
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size: 10.0 //点对象像素尺寸
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});
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const points = new THREE.Points(geometry, material2); //点模型对象
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scene.add(points);
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// 线材质对象
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const material1 = new THREE.LineBasicMaterial({
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color: 0xff0000 //线条颜色
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});
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// 创建线模型对象
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const line = new THREE.Line(geometry, material1);
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scene.add(line);
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// 网格
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const material = new THREE.MeshBasicMaterial({
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color: 0x0000ff,
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side: THREE.DoubleSide,
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});
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const mesh = new THREE.Mesh(geometry, material);
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scene.add(mesh);
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// 几何体xyz三个方向都放大2倍
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geometry.scale(2, 2, 2);
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// 几何体沿着x轴平移50
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geometry.translate(50, 0, 0);
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// 几何体绕着x轴旋转45度
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geometry.rotateX(Math.PI / 4);
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// 居中：已经偏移的几何体居中，执行.center()，你可以看到几何体重新与坐标原点重合
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geometry.center();
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// 几何体旋转、缩放或平移之后，查看几何体顶点位置坐标的变化
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// BufferGeometry的旋转、缩放、平移等方法本质上就是改变顶点的位置坐标
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console.log('顶点位置数据', geometry.attributes.position);
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// AxesHelper
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const axesHelper = new THREE.AxesHelper(150);
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scene.add(axesHelper);
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// 相机
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const camera = new THREE.PerspectiveCamera(); //相机
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camera.position.set(200, 200, 200); //相机位置
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camera.lookAt(0, 0, 0); //相机观察位置
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// 渲染器
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const renderer = new THREE.WebGLRenderer(); // 创建渲染器
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renderer.setSize(window.innerWidth, window.innerHeight); //渲染区域
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renderer.render(scene, camera); //执行渲染
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document.body.appendChild(renderer.domElement);
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const controls = new OrbitControls(camera, renderer.domElement);
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controls.addEventListener('change', function () {
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renderer.render(scene, camera);
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});
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</script>
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</body>
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</html> |