【three.js练习程序】旋转、缩放场景

╰+攻爆jí腚メ 2021-12-16 10:53 319阅读 0赞

<!DOCTYPE html>
    <html>
    <head>
        <meta charset="utf-8">
        <title>ceshi</title>
        <script type="text/javascript" src=".\build\three.js"></script>
        <script src=".\examples\js\controls\TrackballControls.js"></script>
        <script src=".\examples\js\controls\DragControls.js"></script>
        <style>
            body
            {
         
                margin: 0;
                overflow: hidden;
            }
        </style>
    </head>
    <body>
        
        <div id="WebGL-output">
        </div>
        
        <script type="text/javascript">
    
            var cube = new Array(100);
            var rotx = new Array(100);
            var roty = new Array(100);
            var rotz = new Array(100);
            var camera, scene, renderer;
    
            var controls;
            var id = null;
            var fov = 45;
            var near = 0.1;
            var far = 1000;
            init();
    
            function init() {
    
                scene = new THREE.Scene();      //创建场景
    
                camera = new THREE.PerspectiveCamera(fov, window.innerWidth / window.innerHeight, near, far);   //创建摄像机
                camera.position.x = 100;
                camera.position.y = 100;
                camera.position.z = 100;
                camera.lookAt(scene.position);
    
    
                renderer = new THREE.WebGLRenderer();                    //创建一个WebGL渲染器并设置其大小
                renderer.setClearColor(new THREE.Color(0x000000));
                renderer.setSize(window.innerWidth, window.innerHeight);
    
                var axes = new THREE.AxisHelper(200);               //创建三轴表示
                scene.add(axes);
    
                controls = new THREE.TrackballControls(camera);     //创建场景旋转缩放事件
                controls.rotateSpeed = 2.5;
                controls.zoomSpeed = 1.2;
                controls.panSpeed = 0.8;
                controls.noZoom = false;
                controls.noPan = false;
                controls.staticMoving = true;
                controls.dynamicDampingFactor = 0.3;
    
                for (var i = 0; i < 100; i++) {             //随机创建100个正方体
                    var geometry = new THREE.BoxGeometry(5, 5, 5);
                    for (var j = 0; j < geometry.faces.length; j += 2) {
                        var hex = Math.random() * 0xffffff;
                        geometry.faces[j].color.setHex(hex);
                        geometry.faces[j + 1].color.setHex(hex);
                    }
    
                    rotx[i] = Math.random() * 0.05;
                    roty[i] = Math.random() * 0.05;
                    rotz[i] = Math.random() * 0.05;
                    var material = new THREE.MeshBasicMaterial({ vertexColors: 0xff0000 });
                    cube[i] = new THREE.Mesh(geometry, material);
    
                    cube[i].position.x = Math.random() * 100 - 50;
                    cube[i].position.y = Math.random() * 100 - 50;
                    cube[i].position.z = Math.random() * 100 - 50;
    
                    scene.add(cube[i]);
    
                }
    
                id = setInterval(render, 33);
            }
    
            function render() {
                controls.update();
    
                for (var i = 0; i < 100; i++) {
                    cube[i].rotation.x += rotx[i];
                    cube[i].rotation.y += roty[i];
                    cube[i].rotation.z += rotz[i];
                }
    
                renderer.render(scene, camera);
            }
    
            document.getElementById("WebGL-output").appendChild(renderer.domElement);
       
    
        </script>
    </body>
    </html>

![340413-20180215144412468-805079183.png][]

转载于:https://www.cnblogs.com/tiandsp/p/8449500.html

[340413-20180215144412468-805079183.png]: /images/20211214/ad9355a965d14fd8bf4aff5e77838b25.png