<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<style>
body {
margin: 0;
overflow: hidden;
/* 隱藏body窗口區域滾動條 */
}
</style>
<!--引入three.js三維引擎-->
<script src="../../three.js-master/build/three.js"></script>
<!-- 引入threejs擴展控件OrbitControls.js -->
<script src="../../three.js-master/examples/js/controls/OrbitControls.js"></script>
</head>
<body>
<script>
/**
* 創建場景對象Scene
*/
var scene = new THREE.Scene();
let geometry3 = new THREE.PlaneGeometry(100, 100);
let material3 = new THREE.MeshBasicMaterial({
color: 0x00ff00,
//side: THREE.DoubleSide
});
let rect = new THREE.Mesh(geometry3, material3);
rect.rotateX(Math.PI/2); //x軸旋轉90度
scene.updateMatrixWorld(true);
var worldPosition = new THREE.Vector3();
rect.getWorldPosition(worldPosition)
console.log('原始頂點坐標',rect.geometry.vertices);
rect.geometry.vertices.forEach(el=>{
var vector = el.clone();
vector.applyMatrix4( rect.matrixWorld );
console.log('旋轉后的頂點世界坐標',vector);
});
scene.add(rect);
console.log(rect.toJSON());
// // 輔助坐標系 老版本AxisHelper 新版本AxesHelper
var axisHelper = new THREE.AxisHelper(250);
scene.add(axisHelper);
/**
* 光源設置
*/
//點光源
// var point = new THREE.PointLight(0xffffff);
// point.position.set(400, 200, 300); //點光源位置
// scene.add(point); //點光源添加到場景中
// //環境光
// var ambient = new THREE.AmbientLight(0x444444);
// scene.add(ambient);
/**
* 相機設置
*/
var width = window.innerWidth; //窗口寬度
var height = window.innerHeight; //窗口高度
var k = width / height; //窗口寬高比
var s = 150; //三維場景顯示范圍控制系數，系數越大，顯示的范圍越大
//創建相機對象
var camera = new THREE.OrthographicCamera(-s * k, s * k, s, -s, 1, 1000);
camera.position.set(200, 300, 200); //設置相機位置
camera.lookAt(scene.position); //設置相機方向(指向的場景對象)
/**
* 創建渲染器對象
*/
var renderer = new THREE.WebGLRenderer();
renderer.setSize(width, height); //設置渲染區域尺寸
renderer.setClearColor(0xb9d3ff, 1); //設置背景顏色
document.body.appendChild(renderer.domElement); //body元素中插入canvas對象
// 渲染函數
function render() {
renderer.render(scene, camera); //執行渲染操作
}
render();
//創建控件對象 相機對象camera作為參數 控件可以監聽鼠標的變化，改變相機對象的屬性
var controls = new THREE.OrbitControls(camera);
//監聽鼠標事件，觸發渲染函數，更新canvas畫布渲染效果
controls.addEventListener('change', render);
</script>
</body>
</html>
參考:
http://www.yanhuangxueyuan.com/Three.js_course/first.html
http://techbrood.com/zh/news/webgl/three_js-%E5%AF%B9%E8%B1%A1%E5%B1%80%E9%83%A8%E5%9D%90%E6%A0%87%E8%BD%AC%E6%8D%A2%E4%B8%BA%E4%B8%96%E7%95%8C%E5%9D%90%E6%A0%87.html
From:https://www.cnblogs.com/xuejianxiyang/p/9706789.html