three.js实现围绕某物体旋转
程序员文章站
2023-09-08 15:36:54
话不多说，请看代码：
可以拖动右上角观察变化
话不多说，请看代码：
可以拖动右上角观察变化
<!doctype html>
<html lang="en" style="width: 100%; height:100%;">
<head>
<meta charset="utf-8">
<title>document</title>
<script src="http://cdn.bootcss.com/three.js/r83/three.min.js"></script>
<script src="http://cooklife.cn/html/node_modules/dat.gui/build/dat.gui.min.js"></script>
</head>
<body onload="threeexcute()" style="width: 100%; height:100%;">
<div id="box"></div>
</body>
<!-- three.js的核心五步就是：
1.设置three.js渲染器
2.设置摄像机camera
3.设置场景scene
4.设置光源light
5.设置物体object
-->
<script>
// 1.设置three.js渲染器
var renderer;
function initthree(){
width = document.getelementbyid("box").clientwidth;
height = document.getelementbyid("box").clientheight;
renderer = new three.webglrenderer({
antialias:true
});/*生成渲染器对象（属性：抗锯齿效果为设置有效）*/
renderer.setsize(width,height);
document.getelementbyid("box").appendchild(renderer.domelement);
/*设置canvas背景色(clearcolor)和背景色透明度（clearalpha） */
renderer.setclearcolor(0xffff00,1.0);
}
// 2.设置摄像机camera
var camera;
function initcamera(){
camera = new three.perspectivecamera(45,width/height,1,10000);
camera.position.x = 1000;
camera.position.y = 1000;
camera.position.z = 1000;
camera.up.x = 0;
camera.up.y = 0;
camera.up.z = 100;
camera.lookat({x:0,y:0,z:0}); //设置视野的中心坐标
}
// 3.设置场景
var scene;
function initscene(){
scene = new three.scene();
}
// 4.设置光源light
var light;
function initlight(){
light = new three.directionallight(0xff00ff, 1.0, 0); //平行光
light.position.set(100,100, 200); //设置光源位置
scene.add(light); //将官员添加到场景
}
//5.设置物体
var spheremesh;
var cubemesh;
var cubemesh2;
var cubemesh3;
var cubemesh4;
var cubemesh5;
var cubemesh6;
function initobject(){
cubemesh = new three.mesh(new three.boxgeometry(80,80,80),new three.meshlambertmaterial({color:0xff0000})/*
设置球体的材质*/);
cubemesh2 = new three.mesh(new three.boxgeometry(80,80,80),new three.meshlambertmaterial({color:0xff0000})/*
设置球体的材质*/);
cubemesh3 = new three.mesh(new three.boxgeometry(80,80,80),new three.meshlambertmaterial({color:0xff0000})/*
设置球体的材质*/);
spheremesh = new three.mesh(new three.spheregeometry(200,200,200),new three.meshlambertmaterial({color:0xff00ff})/*设置球体的材质*/); //材质设定
spheremesh.position.set(0,0,0); /*设置物体位置*/
cubemesh2.position.set(400,0,0);
cubemesh.position.set(390,150,0);
cubemesh3.position.set(380,100,0);
/*
* 旋转要点。。。
*/
var pivotpoint = new three.object3d();
pivotpoint.add(cubemesh);
pivotpoint.add(cubemesh2);
pivotpoint.add(cubemesh3);
spheremesh.add(pivotpoint);
scene.add(spheremesh);
spheremesh.name = 'cube'
}
control = new function () {
this.rotationspeedx = 0.001;
this.rotationspeedy = 0.001;
this.rotationspeedz = 0.001;
};
function addcontroller(){
var gui = new dat.gui();
gui.add(control, 'rotationspeedx', -0.2, 0.2);
gui.add(control, 'rotationspeedy', -0.2, 0.2);
gui.add(control, 'rotationspeedz', -0.2, 0.2);
}
function render(){
renderer.render(scene, camera);
scene.getobjectbyname('cube').rotation.x += control.rotationspeedx;
scene.getobjectbyname('cube').rotation.y += control.rotationspeedy;
scene.getobjectbyname('cube').rotation.z += control.rotationspeedz;
requestanimationframe(render);
}
function threeexcute(){
initthree();
initcamera();
initscene();
initlight();
initobject();
renderer.clear();
addcontroller();
render();
}
</script>
<style type="text/css">
div#box{
border: none;
cursor: move;
width: 100%;
height: 100%;
background-color: #eeeeee;
}
</style>
</html>
以上就是本文的全部内容，希望本文的内容对大家的学习或者工作能带来一定的帮助，同时也希望多多支持！
上一篇： 爆笑漫画：爸爸的小JJ