THREE.OrbitControls參數控制

// Set to false to disable this control
//鼠標控制是否可用
	this.enabled = true;

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

// How far you can dolly in and out ( PerspectiveCamera only )
//最大最小相機移動距離(景深相機)
	this.minDistance = 0;
	this.maxDistance = Infinity;

// How far you can zoom in and out ( OrthographicCamera only )
//最大最小鼠標縮放大小（正交相機）
	this.minZoom = 0;
	this.maxZoom = Infinity;

// How far you can orbit vertically, upper and lower limits.
// Range is 0 to Math.PI radians.
//最大仰視角和俯視角
	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 ].
//水平方向視角限制
	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
//慣性滑動，滑動大小默認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
//滾輪是否可控制zoom，zoom速度默認1
	this.enableZoom = true;
	this.zoomSpeed = 1.0;

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

// Set to false to disable panning
//是否可平移，默認移動速度為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
//是否自動旋轉，自動旋轉速度。默認每秒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
//是否能使用鍵盤
	this.enableKeys = true;

// The four arrow keys
//默認鍵盤控制上下左右的鍵
	this.keys = { LEFT: 37, UP: 38, RIGHT: 39, BOTTOM: 40 };

// Mouse buttons
//鼠標點擊按鈕
	this.mouseButtons = { ORBIT: THREE.MOUSE.LEFT, ZOOM: THREE.MOUSE.MIDDLE, PAN: THREE.MOUSE.RIGHT };