obj.html

<html>  
<head lang="en">  
    <meta charset="UTF-8">  
    <title>Lession1</title>  
    <script src="js/three.js"></script>  
<!--    <script src="js/three.min.js"></script>  -->
    <script src="js/OBJLoader.js"></script>  
  
</head>  
  
<body> 
<canvas id="scene" width="1920px" height="1080px"></canvas>
<script>
/* http://mamboleoo.be/learnThree/ */
var target = new THREE.Vector3();
var lon = 90, lat = 0;
var phi = 0, theta = 0;

var touchX, touchY;
    
var renderer, scene, camera, banana,orbitControls;

var ww = window.innerWidth,
        wh = window.innerHeight;
function init() {

    renderer = new THREE.WebGLRenderer({
        canvas: document.getElementById('scene')
    });
    renderer.setClearColor(0x000000);//画布颜色
   /*  renderer.setSize(ww, wh);//渲染器 */

    scene = new THREE.Scene();//画布
    //照相机
    //第一个参数  拍摄距离
    //第二个参数  相机拍摄面的长宽比  一般用 宽/高
    //近裁剪面（near clipping plane） 和 远裁剪面（far clipping plane）最小范围  最大范围
    camera = new THREE.PerspectiveCamera(45, ww/wh, 1, 2000);
    camera.position.z = 10;//  camera.position.set(0, 0, 250);
//  camera.lookAt(new THREE.Vector3(0, 10, 0));//lookAt()设置相机所看的位置
    scene.add(camera);

    //环境光和平行光
    var ambient = new THREE.AmbientLight( 0x101030 );
    scene.add( ambient );

    //Load the obj file
    loadOBJ();
//    var orbitControls = new THREE.OrbitControls(camera);
//    orbitControls.target.set(0, 0, 0);
//    orbitControls.autoRotate = true;//设置平面自动旋转
//    window.addEventListener('mousewheel', mousewheel, false);
    

}

var loadDirectionLight=function(){
    var directionalLight = new THREE.DirectionalLight( 0xffeedd );
    directionalLight.position.set( 0, 0, 1 );
    scene.add( directionalLight );
}
var loadOBJ = function() {
    //Manager from ThreeJs to track a loader and its status
    var manager = new THREE.LoadingManager();
    //Loader for Obj from Three.js
    var loader = new THREE.OBJLoader(manager);
    //Launch loading of the obj file, addBananaInScene is the callback when it's ready
    /*   loader.setPath("/resource/template/spoc/normal/scripts/three/"); */
    loader.load('yuying_obj.obj', addBananaInScene,onProgress);

};


var addBananaInScene = function(object) {
    //设置模型的中心在模型的中点
    banana = object;
    banana.children[0].geometry.computeBoundingBox();
    banana.rotation.x = THREE.Math.degToRad( 90 );
    banana.children[0].geometry.center()
    helper = new THREE.BoxHelper(banana, 0x0000000);
    helper.update();
    //设置结束
    //Move the banana in the scene
    //Go through all children of the loaded object and search for a Mesh
    object.traverse(function(child) {
        //This allow us to check if the children is an instance of the Mesh constructor
        if (child instanceof THREE.Mesh) {
            //Sometimes there are some vertex normals missing in the .obj files, ThreeJs will compute them
            child.geometry.computeVertexNormals();
        }
    });
    banana.scale.set(0.02, 0.02, 0.02);

    banana.rotation.x = -3;
    scene.add(helper);
    //Add the 3D object in the scene
    scene.add(banana);
    render();
};


var render = function() {
    requestAnimationFrame(render);

    //Turn the banana
     banana.rotation.y += .01;

    renderer.render(scene, camera);
};
var onProgress = function ( xhr ) {
    if ( xhr.lengthComputable ) {
        var percentComplete = xhr.loaded / xhr.total * 100;
        console.log( Math.round(percentComplete, 2) + '% downloaded' );
    }
};
//鼠标滑轮
//function mousewheel(e) {
//    e.preventDefault();
//    //e.stopPropagation();
//    if (e.wheelDelta) {  //判断浏览器IE，谷歌滑轮事件
//        if (e.wheelDelta > 0) { //当滑轮向上滚动时
//            fov -= (near < fov ? 1 : 0);
//        }
//        if (e.wheelDelta < 0) { //当滑轮向下滚动时
//            fov += (fov < far ? 1 : 0);
//        }
//    } else if (e.detail) {  //Firefox滑轮事件
//        if (e.detail > 0) { //当滑轮向上滚动时
//            fov -= 1;
//        }
//        if (e.detail < 0) { //当滑轮向下滚动时
//            fov += 1;
//        }
//    }
//    camera.fov = fov;
//    camera.updateProjectionMatrix();
//    renderer.render(scene, camera);
//    //updateinfo();
//}
//
    // 初始化控制器
function initMouseControl() {
    // mouseControl = new THREE.OrbitControls(camera);
    document.addEventListener( 'mousedown', onDocumentMouseDown, false );
    document.addEventListener( 'wheel', onDocumentMouseWheel, false );
    document.addEventListener( 'touchstart', onDocumentTouchStart, false );
    document.addEventListener( 'touchmove', onDocumentTouchMove, false );
    window.addEventListener( 'resize', onWindowResize, false );

}
    
    /**
 * 窗体大小改变
 */
function onWindowResize() {
    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();
    renderer.setSize( window.innerWidth, window.innerHeight );
}

/*
相机焦点跟着鼠标或手指的操作移动
 */
function onDocumentMouseDown( event ) {
    event.preventDefault();
    document.addEventListener( 'mousemove', onDocumentMouseMove, false );
    document.addEventListener( 'mouseup', onDocumentMouseUp, false );

}

function onDocumentMouseMove( event ) {
    var movementX = event.movementX || event.mozMovementX || event.webkitMovementX || 0;
    var movementY = event.movementY || event.mozMovementY || event.webkitMovementY || 0;
    lon -= movementX * 0.1;
    lat += movementY * 0.1;
}

function onDocumentMouseUp( event ) {
    document.removeEventListener( 'mousemove', onDocumentMouseMove );
    document.removeEventListener( 'mouseup', onDocumentMouseUp );
}

/**
 * 鼠标滚轮改变相机焦距
 */
function onDocumentMouseWheel( event ) {
    camera.fov += event.deltaY * 0.05;
    camera.updateProjectionMatrix();
}

function onDocumentTouchStart( event ) {
    event.preventDefault();
    var touch = event.touches[ 0 ];
    touchX = touch.screenX;
    touchY = touch.screenY;

}

function onDocumentTouchMove( event ) {
    event.preventDefault();
    var touch = event.touches[ 0 ];
    lon -= ( touch.screenX - touchX ) * 0.1;
    lat += ( touch.screenY - touchY ) * 0.1;
    touchX = touch.screenX;
    touchY = touch.screenY;

}

/**
 * 实时渲染函数
 */
function animate() {
    requestAnimationFrame(animate);
    // lon = Math.max(-180, Math.min(180, lon));//限制固定角度内旋转
    // lon += 0.1;//自动旋转
    lat = Math.max(-85, Math.min(85, lat)); //限制固定角度内旋转
    phi = THREE.Math.degToRad(85 - lat);
    theta = THREE.Math.degToRad(lon+180);
    target.x = Math.sin(phi) * Math.cos(theta);
    target.y = Math.cos(phi);
    target.z = Math.sin(phi) * Math.sin(theta);
    camera.lookAt( target );
    camera.updateProjectionMatrix();
    renderer.render(scene, camera);
}
    
    
    initMouseControl();
    init();
    loadDirectionLight();
    
    animate();
</script>
</body>  
  
  
</html>  