相机旋转

cube.rotation.y -= 0.002;

    let t0 = new Date()
    function animate() {
        controls.update();
        let t1 = new Date(); //本次时间
        let t = t1 - t0; // 时间差

        //camera.translateX(0.001 * t/3) //沿着Y轴旋转着从大到小

        //camera.translateZ(0.001 * t/3) //沿着Z轴由近到远

        camera.rotateY(0.0001 * t/3); //物体的均匀从左到又平移可以用相机旋转Y轴来实现

        camera.lookAt(scene.position); camera.lookAt与orbitcontrol冲突不能使用，要用下面的controls.target代替
        //controls.target = new THREE.Vector3(0,-100,0);
        renderer.render(scene, camera);
        requestAnimationFrame(animate);
    }

controls = new THREE.OrbitControls(camera, renderer.domElement);
controls.autoRotate = true; 

camera.translateX(0.001 * t/3) //沿着Y轴旋转着从大到小
camera.translateZ(0.001 * t/3) //沿着Z轴由近到远

camera.rotateY(0.0001 * t/3); //物体均匀的从左到右平移