unity小地图制作代码....

using UnityEngine;
using UnityEngine.EventSystems;

public class UIMiniMap : MonoBehaviour, IPointerDownHandler
{
/// <summary>
/// 小地图上的A点
/// </summary>
public RectTransform a;
/// <summary>
/// 小地图上的B点
/// </summary>
public RectTransform b;
/// <summary>
/// 控制的东西，这里使用cube代替
/// </summary>
public GameObject players;
/// <summary>
/// 3D物体0点,设置初始点
/// </summary>
public GameObject zerpos;
/// <summary>
/// 摄像机
/// </summary>
private Camera UICamera;
/// <summary>
/// 地图大小
/// </summary>
public float scale = 160;
/// <summary>
/// A,B两点
/// </summary>
private Vector3 acpos;
private Vector3 bcpos;

void Start()
{
setCamera(gameObject);
}

void setCamera(GameObject gam)
{
if (gam.GetComponent<Canvas>() != null)
{
Canvas can = gam.GetComponent<Canvas>();
//设置画布相机的渲染模式为worldCamera
if (can.renderMode == RenderMode.ScreenSpaceOverlay)
{
UICamera = null;
}
else
{
//
UICamera = can.worldCamera;
}
return;
}
//获得父类，Canvas物体
gam = gam.transform.parent.gameObject;
//在运行的过程中实时设置摄像机的渲染模式
setCamera(gam);
}
/// <summary>
/// 鼠标点击事件的处理
/// </summary>
/// <param name="eventData">鼠标点击事件处理类</param>
public void OnPointerDown(PointerEventData eventData)
{
III(eventData);
}
public void OnDrag(PointerEventData eventData)
{
III(eventData);
}

/// <summary>
/// 处理鼠标点击事件的方法
/// </summary>
/// <param name="eventData"></param>
void III(PointerEventData eventData)
{
if (UICamera == null)
{
//获取A,B两点，并保存
acpos = a.position;
bcpos = b.position;
}
else
{
acpos = UICamera.WorldToScreenPoint(a.position);
bcpos = UICamera.WorldToScreenPoint(b.position);
}
//计算两个点的差值
float h = bcpos.y - acpos.y;
float w = bcpos.x - acpos.x;

<span style="white-space:pre">	</span>//计算鼠标点击的点与A,B两点的差值
float tempH = eventData.position.y - acpos.y;
float tempW = eventData.position.x - acpos.x;
//小地图与大地图的转换公式
float dtw = tempW / w * scale;
float dth = tempH / h * scale;
//把新的位置赋值给players，实现在小地图中的移动
Vector3 tempPos = new Vector3(dtw, players.transform.position.y, dth);
players.transform.position = zerpos.transform.position + tempPos;
}
}