threejs学习笔记04---物体动

Posted 2020-10-18 敷衍轻笑

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        html, body {
            margin: 0;
            padding: 0;
        }
        div#canvas-frame {
            border: none;
            cursor: pointer;
            width: 100%;
            height: 600px;
            background-color: #EEEEEE;
        }
    </style>
</head>
<body>
<div id="canvas-frame"></div>
<script src="js/three.js"></script>
<script src="js/Stats.js"></script>
<script src="js/tween.min.js"></script>
<script>
    //定义一些需要的变量
    var renderer, camera, scene, light, object,stats,TWEEN;
    var width, height;
    //初始化three
    function initThree(){
        width = document.getElementById(‘canvas-frame‘).clientWidth;
        height=document.getElementById(‘canvas-frame‘).clientHeight;
        renderer= new THREE.WebGLRenderer({
            antialias:true
        });
        renderer.setSize(width,height);
        document.getElementById(‘canvas-frame‘).appendChild(renderer.domElement);
        renderer.setClearColor(0xFFFFFF, 1.0);

        //性能监视器
        stats = new Stats();
        stats.domElement.style.position="absolute";
        stats.domElement.style.left="0px";
        stats.domElement.style.top="0px";
        document.getElementById(‘canvas-frame‘).appendChild(stats.domElement)
    }
    var camera;
    function initCamera() {
        camera = new THREE.PerspectiveCamera(45, width / height, 1, 10000);
        camera.position.x = 0;
        camera.position.y = 0;
        camera.position.z = 600;
        camera.up.x = 0;
        camera.up.y = 1;
        camera.up.z = 0;
        camera.lookAt({
            x : 0,
            y : 0,
            z : 0
        });
    }

    var scene;
    function initScene() {
        scene = new THREE.Scene();
    }

    var light;
    function initLight() {
        light = new THREE.AmbientLight(0xFF0000);
        light.position.set(100, 100, 200);
        scene.add(light);
        light = new THREE.PointLight(0x00FF00);
        light.position.set(0, 0,300);
        scene.add(light);
    }

    var cube;
    var mesh;
    function initObject() {
        var geometry = new THREE.CylinderGeometry( 100,150,400);
        var material = new THREE.MeshLambertMaterial( { color:0xFFFFFF} );
        mesh = new THREE.Mesh( geometry,material);
        mesh.position = new THREE.Vector3(0,0,0);
        scene.add(mesh);
    }

    function threeStart() {
        initThree();
        initCamera();
        initScene();
        initLight();
        initObject();
        animation();

    }
    function animation()
    {
        mesh.position.x-=1;
        renderer.render(scene, camera);
        requestAnimationFrame(animation);
        //调用stats.update()函数来统计时间和帧数
        stats.update();
    }

    window.onload = threeStart();
</script>
</body>
</html>

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