unity3d实现鼠标拖拽旋转

怎么实现unity3d 鼠标拖拽旋转，滚轮缩放的功能呢?下面是小编收集整理关于unity3d 鼠标拖拽旋转，滚轮缩放的功能的资料以供大家参考学习，希望大家喜欢。

unity3d 鼠标拖拽旋转，滚轮缩放的功能的详细代码

var target : Transform;

var xSpeed = 250.0;

var ySpeed = 120.0;

var yMinLimit = -20;

var yMaxLimit = 80;

var initDis = 20;

var minDis = 3.0;

var maxDis = 50.0;

var wheelSpeed = 5;

static var x = 0.0;

static var y = 0.0;

static var distance;

private var position;

private var rotation;

function Start () {

x = 130;

y = 30;

transform.rotation = Quaternion.Euler(y, x, 0);;

transform.position = Quaternion.Euler(y, x, 0) * Vector3(0.0, 0.0, -initDis) + target.position;

// Make the rigid body not change rotation

if (rigidbody)

rigidbody.freezeRotation = true;

}

function Update () {

if (target) {

distance = Vector3.Distance(target.position,transform.position);

if(Input.GetMouseButton(1)){

x += Input.GetAxis("Mouse X") * xSpeed * 0.02;

y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02;

y = ClampAngle(y, yMinLimit, yMaxLimit);

}

distance-= Input.GetAxis("Mouse ScrollWheel")*wheelSpeed;//获取鼠标中建响应

distance = Mathf.Clamp(distance,minDis,maxDis);//距离取最大值和最小值

rotation = Quaternion.Euler(y, x, 0);

position = rotation * Vector3(0.0, 0.0, -distance) + target.position;

transform.rotation = rotation;

transform.position = position;

}

}

static function ClampAngle (angle : float, min : float, max : float) {

if (angle < -360)

angle += 360;

if (angle > 360)

angle -= 360;

return Mathf.Clamp (angle, min, max);