using?System.Collections;
using?System.Collections.Generic;
using?UnityEngine;


public?class?DragRoteScale?:?MonoBehaviour
{
????public?float?scaleRate?=?0.01f;?????????//縮放系數(shù)
????public?float?scaleMin?=?0.1f;???????????//最小縮放
????public?float?scaleMax?=?10.0f;??????????//最大縮放

????public?bool?isRotateY?=?true;???//是否繞y軸旋轉(zhuǎn)
????public?bool?isRotateX?=?true;???//是否繞X軸旋轉(zhuǎn)
????public?float?rotateRate?=?1.0f;?//旋轉(zhuǎn)系數(shù)

????public?Transform?transform?=?null;??//要操作的物體若直接掛在物體上不用設(shè)置

????private?Touch?oldTouch1;??//上次觸摸點(diǎn)1（手指1）
????private?Touch?oldTouch2;??//上次觸摸點(diǎn)2（手指2）

????private?bool?isDrag?=?false;????????//拖拽標(biāo)志
????private?Vector3?m_Offset;???????????//偏移值
????private?Vector3?m_TargetScreenVec;??//當(dāng)前物體對應(yīng)的屏幕坐標(biāo)

????private?bool?isRote?=?false;????????//是否旋轉(zhuǎn)
????private?Vector2?oldMousePos;????????//鼠標(biāo)上次位置


????void?Start（）
????{
????????if?（transform?==?null）
????????{
????????????transform?=?gameobject.transform;
????????}
????}

????void?Update（）
????{

????????if?（Application.platform?==?RuntimePlatform.Android?||?Application.platform?==?RuntimePlatform.IPhonePlayer）
????????{
????????????if?（Input.touchCount?<=?0）??//沒有觸摸
????????????????return;

????????????Touch?touch1?=?new?Touch（）;
????????????Touch?touch2?=?new?Touch（）;

????????????if?（Input.touchCount?>=?1）
????????????????touch1?=?Input.GetTouch（0）;

????????????if?（Input.touchCount?>=?2）
????????????????touch2?=?Input.GetTouch（1）;


????????????if?（Input.touchCount?==?1）//單指
????????????{
????????????????if?（touch1.phase?==?TouchPhase.Began）//開始單擊
????????????????{
????????????????????Ray?ray?=?Camera.main.ScreenPointToRay（touch1.position）;
????????????????????//hit用來存儲碰撞物體的信息???
????????????????????RaycastHit?hit;
????????????????????//ray表示射線，hit存儲物體的信息100為設(shè)定射線發(fā)射的距離???
????????????????????if?（Physics.Raycast（ray?out?hit?100）?&&?hit.transform?==?transform）?//自身被點(diǎn)中
????????????????????{
????????????????????????isDrag?=?true;
????????????????????????//當(dāng)前物體對應(yīng)的屏幕坐標(biāo)
????????????????????????m_TargetScreenVec?=?Camera.main.WorldToScreenPoint（transform.position）;
????????????????????????//偏移值=物體的世界坐標(biāo)，減去轉(zhuǎn)化之后的鼠標(biāo)世界坐標(biāo)（z軸的值為物體屏幕坐標(biāo)的z值）
????????????????????????m_Offset?=?transform.position?-?Camera.main.ScreenToWorldPoint（new?Vector3（touch1.position.x?touch1.position.y?m_TargetScreenVec.z））;
????????????????????}
????????????????????else
????????????????????????isDrag?=?false;
????????????????}
????????????????else
????????????????{
????????????????????if?（isDrag）??//拖拽
????????????????????{
????????????????????????//當(dāng)前坐標(biāo)等于轉(zhuǎn)化鼠標(biāo)為世界坐標(biāo)（z軸的值為物體屏幕坐標(biāo)的z值）+?偏移量
????????????????????????transform.position?=?Camera.main.ScreenToWorldPoint（new?Vector3（touch1.position.x?touch1.position.y?m_TargetScreenVec.z））?+?m_Offset;
????????????????????}
????????????????????else????????//旋轉(zhuǎn)
????????????????????{
????????????????????????if?（isRotateY）
????????????????????????????transform.Rotate（Vector3.down?*?touch1.deltaPosition.x?*?rotat