游戏开发之用摇杆控制摄像机的移动旋转缩放

[b]          游戏开发之用摇杆控制摄像机的移动旋转缩放[/b]

注意：需要用到的插件EasyTouch
5.x
    下面是我在Unity中关于控制Camera的一些功能进行设计的物件搭建，分为五个层级，每个层级的transform的position都是（0,0,0），最后一个层级是用来显示场景的Camera。这样搭建的好处是为了方便分别控制Camera的移动旋转和距离目标物体的远近。然后我给CameraFollow写一个Camera控制脚本，就叫CameraController。
         


    具体功能需求：相机需要始终跟随目标对象，点住鼠标右键移动，相机盯着目标上下旋转，鼠标中键是控制视野的远近。在移动平台，移动摇杆，水平轴控制左右旋转，垂直轴控制上下旋转，两个手指向内滑动，视野拉近，两个手指向外滑动，视野拉远。上下旋转的时候做一下限制视角，视野也得做下限制。
   下图是一个功能测试场景：

    

 
 
    相机脚本如下：
using HedgehogTeam.EasyTouch;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;
 
public class CameraController :MonoBehaviour {
 
    private Transform player;
 
    private Transform upAndDown;
 
    private Transform zoomContainer;
 
    private Transform cameraContainer;
 
    public float rotateYSpeed=400f;
 
    public float rotateXSpeed
= 200f;
 
    public float zoomSpeed
= 120f;
 
    public Vector3 startPos
= new Vector3(0,
1, -2.5f);
 
    public GameObject target
= null;
 
    private ETCJoystick cameraJoystic;
 
    
    private void Start()
    {
        if (target
!= null)
        { player = target.transform; }
        else

        { player = GameObject.FindGameObjectWithTag("Player").transform; }
        upAndDown =this.transform.Find("upAndDown");
        zoomContainer =this.transform.Find("upAndDown/zoomContainer");
        cameraContainer =this.transform.Find("upAndDown/zoomContainer/cameraContainer");
        this.cameraContainer.localPosition
= startPos;
        cameraJoystic =ETCInput.GetControlJoystick("cameraJoystick");
        EasyTouch.On_PinchOut
+= OnPinchOut;
        EasyTouch.On_PinchIn
+= OnPinchIn;
    }
 
    private void OnPinchIn(Gesture gesture)
    {
        Vector3 pos
= this.cameraContainer.localPosition;
        pos.z -= gesture.deltaPinch *Time.deltaTime
* zoomSpeed;
        pos.z =Mathf.Clamp(pos.z,
-5f, -2f);
        this.cameraContainer.localPosition
= pos;
    }
 
    private void OnPinchOut(Gesture gesture)
    {
        Vector3 pos
= this.cameraContainer.localPosition;
        pos.z += gesture.deltaPinch *Time.deltaTime*zoomSpeed;
        pos.z =Mathf.Clamp(pos.z,
-5f, -2f);
        this.cameraContainer.localPosition
= pos;
    }
 
    private void Update()
    {
        //follow
        this.transform.position
= player.position;
 
        float h
= cameraJoystic.axisX.axisValue;
        float v
= cameraJoystic.axisY.axisValue;
        
        if(h!=0)
        {
            this.transform.Rotate(new Vector3(0,
-rotateYSpeed * Time.deltaTime * h, 0));
        }
        if(v!=0)
        {
            upAndDown.Rotate(new Vector3(rotateXSpeed
* v * Time.deltaTime, 0, 0));
            float x=
upAndDown.localEulerAngles.x;
            x =Mathf.Clamp(x,
10f, 60f);
            upAndDown.localEulerAngles =new Vector3(x,
0, 0);
        }
        //rotate around player
        if (Input.GetMouseButton(1))
        {
            float mouseX
= Input.GetAxis("Mouse
X");
            if (mouseX
!= 0)
            {
                this.transform.Rotate(new Vector3(0,
rotateYSpeed * Time.deltaTime * mouseX, 0));
            }
        }
 
        if (Input.GetMouseButton(1))
        {
            float mouseY
= Input.GetAxis("Mouse
Y");
            if (mouseY
!= 0)
            {
                upAndDown.Rotate(new Vector3(-rotateXSpeed
* Time.deltaTime * mouseY, 0, 0));
            }
        }
 
        //lookAt
        zoomContainer.LookAt(player.position);
         
        //zoom
        float wheelScroll
= Input.GetAxis("Mouse
ScrollWheel");
        Vector3 pos=this.cameraContainer.localPosition;
        pos.z += wheelScroll * zoomSpeed *Time.deltaTime;
        pos.z =Mathf.Clamp(pos.z,
-5f, -2f);
        this.cameraContainer.localPosition
= pos;
    }
 
    private void OnApplicationQuit()
    {
        EasyTouch.On_PinchOut
-= OnPinchOut;
        EasyTouch.On_PinchIn
-= OnPinchIn;
    }
}