mirror of
https://github.com/jiawanlong/Cesium-Examples.git
synced 2025-11-04 01:04:17 +00:00
103 lines
4.1 KiB
HTML
103 lines
4.1 KiB
HTML
<!--********************************************************************
|
||
* by jiawanlong
|
||
*********************************************************************-->
|
||
<!DOCTYPE html>
|
||
<html>
|
||
|
||
<head>
|
||
<meta charset="UTF-8" />
|
||
<style>
|
||
* {
|
||
margin: 0;
|
||
padding: 0;
|
||
overflow: hidden;
|
||
}
|
||
</style>
|
||
</head>
|
||
|
||
<body>
|
||
<script type="importmap">
|
||
{
|
||
"imports": {
|
||
"three": "./../../three/build/three.module.js",
|
||
"three/addons/": "./../../three/examples/jsm/"
|
||
}
|
||
}
|
||
</script>
|
||
|
||
|
||
<script type="module">
|
||
import * as THREE from 'three';
|
||
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
|
||
|
||
const getColor = () => '#' + Math.floor(Math.random() * 0xffffff).toString(16).padStart(6, '0')
|
||
|
||
// 场景
|
||
const scene = new THREE.Scene();// 创建场景
|
||
const geometry = new THREE.BoxGeometry(5, 5, 5);
|
||
for (let i = 0; i < 10; i++) {
|
||
for (let j = 0; j < 10; j++) {
|
||
for (let k = 0; k < 10; k++) {
|
||
const material = new THREE.MeshBasicMaterial({ color: getColor() }); //材质
|
||
const mesh = new THREE.Mesh(geometry, material);
|
||
mesh.position.set(i * 20, k * 20, j * 20);
|
||
scene.add(mesh);
|
||
}
|
||
}
|
||
}
|
||
|
||
// AxesHelper
|
||
const axesHelper = new THREE.AxesHelper(300);
|
||
scene.add(axesHelper);
|
||
|
||
|
||
// 透视投影可以模拟人眼观察世界的视觉效果，人在场景中漫游，或是在高处俯瞰整个园区或工厂
|
||
// 正投影相机可以做 中国地图的效果，或者一个2D可视化的效果
|
||
|
||
/*
|
||
1、透视投影相机 PerspectiveCamera（远小近大投影规律）
|
||
fov (Field of View)：垂直视野角度，通常以度为单位。
|
||
aspect：宽高比，通常是渲染器的宽度除以高度。
|
||
near：近裁剪面距离，小于这个距离的物体将不可见。
|
||
far：远裁剪面距离，大于这个距离的物体将不可见。
|
||
*/
|
||
// const camera = new THREE.PerspectiveCamera(); //相机
|
||
// const camera = new THREE.PerspectiveCamera(75, document.body.clientWidth / document.body.clientHeight, 0.1, 3000)
|
||
// camera.position.set(500, 500, 500);
|
||
// camera.lookAt(0, 0, 0);
|
||
|
||
/*
|
||
2、正投影相机 OrthographicCamera( left, right, top, bottom, near, far )
|
||
left 渲染空间的左边界
|
||
right 渲染空间的右边界
|
||
top 渲染空间的上边界
|
||
bottom 渲染空间的下边界
|
||
near near属性表示的是从距离相机多远的位置开始渲染，一般情况会设置一个很小的值。 默认值0.1
|
||
far far属性表示的是距离相机多远的位置截止渲染，如果设置的值偏小小，会有部分场景看不到。 默认值2000
|
||
*/
|
||
const width = window.innerWidth; //canvas画布宽度
|
||
const height = window.innerHeight; //canvas画布高度
|
||
const k = width / height; //canvas画布宽高比
|
||
const s = 600;//控制left, right, top, bottom范围大小
|
||
const camera = new THREE.OrthographicCamera(-s * k, s * k, s, -s, 1, 8000);
|
||
camera.position.set(500, 500, 500);//相机放在了y轴上
|
||
camera.lookAt(0, 0, 0);//指向坐标原点
|
||
|
||
// 渲染器
|
||
const renderer = new THREE.WebGLRenderer(); // 创建渲染器
|
||
renderer.setSize(window.innerWidth, window.innerHeight); //渲染区域
|
||
renderer.render(scene, camera); //执行渲染
|
||
document.body.appendChild(renderer.domElement);
|
||
|
||
// 设置相机控件轨道控制器OrbitControls
|
||
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
|
||
console.log(camera.position)
|
||
});//监听鼠标、键盘事件
|
||
</script>
|
||
|
||
</body>
|
||
|
||
</html> |