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demo11.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>多个几何体及三维坐标系</title>
<style>
body {
margin: 0;
}
canvas {
width: 100%;
height: 100%;
}
</style>
</head>
<body>
<script src="js/three.js"></script>
<script src="js/controls/OrbitControls.js"></script>
<script type="module">
var scene = new THREE.Scene()
// 立方体
// 立方体网格模型
var geometry1 = new THREE.BoxGeometry(100, 100, 100)
var material1 = new THREE.MeshLambertMaterial({
color: 0x0000ff
}) //材质对象Material
var mesh1 = new THREE.Mesh(geometry1, material1) //网格模型对象Mesh
scene.add(mesh1) //网格模型添加到场景中
// 球体网格模型
var geometry2 = new THREE.SphereGeometry(60, 40, 40)
var material2 = new THREE.MeshLambertMaterial({
color: 0xff00ff
})
var mesh2 = new THREE.Mesh(geometry2, material2) //网格模型对象Mesh
mesh2.translateY(120) //球体网格模型沿Y轴正方向平移120
scene.add(mesh2)
// 圆柱网格模型
var geometry3 = new THREE.CylinderGeometry(50, 50, 100, 25)
var material3 = new THREE.MeshLambertMaterial({
color: 0xffff00
})
var mesh3 = new THREE.Mesh(geometry3, material3) //网格模型对象Mesh
// mesh3.translateX(120); //球体网格模型沿Y轴正方向平移120
mesh3.position.set(120, 0, 0) //设置mesh3模型对象的xyz坐标为120,0,0
scene.add(mesh3) //
// 点光源
var point = new THREE.PointLight(0xffffff)
point.position.set(400, 200, 300) //点光源位置
scene.add(point) //点光源添加到场景中
// 环境光
var ambient = new THREE.AmbientLight(0x444444)
scene.add(ambient)
// 辅助坐标系 参数250表示坐标系大小，可以根据场景大小去设置
var axisHelper = new THREE.AxisHelper(500)
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
// 正射投影相机对象
var camera = new THREE.OrthographicCamera(-s * k, s * k, s, -s, 1, 1000)
// camera.position.z = 100
camera.position.set(200, 200, 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.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);
function render() {
// console.info('OrbitControls change')
console.info(camera.toJSON().object.matrix)
renderer.render(scene, camera) //执行渲染操作
// mesh.rotateY(0.01) //每次绕y轴旋转0.01弧度
// requestAnimationFrame(render) //请求再次执行渲染函数render
}
render()
var controls = new THREE.OrbitControls(camera, renderer.domElement)
controls.addEventListener('change', render) //监听鼠标、键盘事件
</script>
</body>
</html>