three.js加载3ds或obj模型,如何实现鼠标拖拽等功能?

发布网友发布时间：2022-04-26 10:25

共2个回答

热心网友时间：2022-04-20 07:57

<!DOCTYPE html>
<html>
    <head>
        <script type="text/javascript" src="libs/three.js"></script>
        <script type="text/javascript" src="libs/OBJLoader.js"></script>

        <script type="text/javascript">
            var scene = null;
            var camera = null;
            var renderer = null;

            var mesh = null;
            var id = null;

            function init() {
                renderer = new THREE.WebGLRenderer({//渲染器
                    canvas: document.getElementById('mainCanvas')//画布
                });
                renderer.setClearColor(0x000000);//画布颜色
                scene = new THREE.Scene();//创建场景

                camera = new THREE.OrthographicCamera(-5, 5, 3.75, -3.75, 0.1, 100);//正交投影照相机
                camera.position.set(15, 25, 25);//相机位置
                camera.lookAt(new THREE.Vector3(0, 2, 0));//lookAt()设置相机所看的位置
                scene.add(camera);//把相机添加到场景中

                var loader = new THREE.OBJLoader();//在init函数中，创建loader变量，用于导入模型
                loader.load('libs/port.obj', function(obj) {//第一个表示模型路径，第二个表示完成导入后的回调函数，一般我们需要在这个回调函数中将导入的模型添加到场景中
                    obj.traverse(function(child) {
                        if (child instanceof THREE.Mesh) {
                            child.material.side = THREE.DoubleSide;
                        }
                    });

                    mesh = obj;//储存到全局变量中
                    scene.add(obj);//将导入的模型添加到场景中
                });

                var light = new THREE.DirectionalLight(0xffffff);//光源颜色
                light.position.set(20, 10, 5);//光源位置
                scene.add(light);//光源添加到场景中

                id = setInterval(draw, 20);//每隔20s重绘一次
            }

            function draw() {//们在重绘函数中让茶壶旋转：
                renderer.render(scene, camera);//调用WebGLRenderer的render函数刷新场景

                mesh.rotation.y += 0.01;//添加动画
                if (mesh.rotation.y > Math.PI * 2) {
                    mesh.rotation.y -= Math.PI * 2;
                }
            }
        </script>
    </head>

    <body onload="init()">
        <canvas id="mainCanvas" width="800px" height="600px" ></canvas>
    </body>
</html>

热心网友时间：2022-04-20 09:15

【OrbitControls】
// Set to false to disable this control
//鼠标控制是否可用
this.enabled = true;

// "target" sets the location of focus, where the object orbits around
//聚焦坐标
this.target = new THREE.Vector3();

// How far you can dolly in and out ( PerspectiveCamera only )
//最大最小相机移动距离(景深相机)
this.minDistance = 0;
this.maxDistance = Infinity;
// How far you can zoom in and out ( OrthographicCamera only )
//最大最小鼠标缩放大小（正交相机）
this.minZoom = 0;
this.maxZoom = Infinity;

// How far you can orbit vertically, upper and lower limits.
// Range is 0 to Math.PI radians.
//最大仰视角和俯视角
this.minPolarAngle = 0; // radians
this.maxPolarAngle = Math.PI; // radians

// How far you can orbit horizontally, upper and lower limits.
// If set, must be a sub-interval of the interval [ - Math.PI, Math.PI ].
//水平方向视角*
this.minAzimuthAngle = - Infinity; // radians
this.maxAzimuthAngle = Infinity; // radians

// Set to true to enable damping (inertia)
// If damping is enabled, you must call controls.update() in your animation loop
//惯性滑动，滑动大小默认0.25
this.enableDamping = false;
this.dampingFactor = 0.25;

// This option actually enables dollying in and out; left as "zoom" for backwards compatibility.
// Set to false to disable zooming
//滚轮是否可控制zoom，zoom速度默认1
this.enableZoom = true;
this.zoomSpeed = 1.0;

// Set to false to disable rotating
//是否可旋转，旋转速度
this.enableRotate = true;
this.rotateSpeed = 1.0;

// Set to false to disable panning
//是否可平移，默认移动速度为7px
this.enablePan = true;
this.keyPanSpeed = 7.0; // pixels moved per arrow key push

// Set to true to automatically rotate around the target
// If auto-rotate is enabled, you must call controls.update() in your animation loop
//是否自动旋转，自动旋转速度。默认每秒30圈
this.autoRotate = false;
this.autoRotateSpeed = 2.0; // 30 seconds per round when fps is 60

// Set to false to disable use of the keys
//是否能使用键盘
this.enableKeys = true;

// The four arrow keys
//默认键盘控制上下左右的键
this.keys = { LEFT: 37, UP: 38, RIGHT: 39, BOTTOM: 40 };

// Mouse buttons
//鼠标点击按钮
this.mouseButtons = { ORBIT: THREE.MOUSE.LEFT, ZOOM: THREE.MOUSE.MIDDLE, PAN: THREE.MOUSE.RIGHT };