Unity鼠标在屏幕边缘移动视角

##效果类似RTS游戏中鼠标在屏幕边缘移动视角 演示视频：https://www.bilibili.com/video/BV1d44y1V7VR/ 在场景中任意添加一个参照物即可 ###1.首先是2D场景 新建空物体并搭载脚本

CamMove

public class CamMove : MonoBehaviour
{
public float edgeSize;	//会产生移动效果的边缘宽度
public float moveAmount;    //移动速度

public Camera myCamera;	//会移动的摄像机

private Vector3 camFollowPos;	//用于给摄像机赋值

private bool edgeScrolling = true;	//移动开关
// Start is called before the first frame update
void Start()
{
camFollowPos = myCamera.transform.position;	//保存摄像机初始位置，移动是在初始位置的基础上计算
}

void Update()
{
if (Input.GetKeyDown(KeyCode.Space))	//移动开关
{
edgeScrolling = !edgeScrolling;
}
if (edgeScrolling)	//如果打开
{
//屏幕左下角为坐标(0, 0)
if (Input.mousePosition.x > Screen.width - edgeSize)//如果鼠标位置在右侧
{
camFollowPos.x += moveAmount * Time.deltaTime;//就向右移动
}
if (Input.mousePosition.x < edgeSize)
{
camFollowPos.x -= moveAmount * Time.deltaTime;
}
if (Input.mousePosition.y > Screen.height - edgeSize)
{
camFollowPos.y += moveAmount * Time.deltaTime;
}
if (Input.mousePosition.y < edgeSize)
{
camFollowPos.y -= moveAmount * Time.deltaTime;
}
myCamera.transform.position = camFollowPos;//刷新摄像机位置
}
}
}

这样鼠标移动到屏幕边缘时摄像头就会移动 ###2.然后是3D场景 将脚本中会变化的camFollowPos.y改为camFollowPos.z即可

public class CamMove : MonoBehaviour
{
......
if (Input.mousePosition.y > Screen.height - edgeSize)
{
camFollowPos.z += moveAmount * Time.deltaTime;
}
if (Input.mousePosition.y < edgeSize)
{
camFollowPos.z -= moveAmount * Time.deltaTime;
}
}
}
}