[游戏开发]Unity-UGUI制作的小地图-可放大缩小视角，大地图小地图切换

Unity-UGUI制作的小地图-可放大缩小视角，大地图小地图切换

1.效果图 文章最后也会附上 Demo下载地址

• 缩小状态
  

• 放大状态
  

2.实现思路

首先新建一个相机来显示小地图，需要新建一个层级小地图来渲染，主相机不渲染，
新建一个rendertexture把相机画面输出到上面，新建Canvas->Rawimage,把rendertexture附上即可。

3.代码

      // 这是相机视角缩放
       btn_ZoomIn.onClick.AddListener(() =>
        {
            TargetSize -= 4f;
            TargetSize = Mathf.Clamp(TargetSize, MinZoom, MaxZoom);
            isZoom = true;
        });
        btn_ZoomOut.onClick.AddListener(() =>
        {
            TargetSize += 4f;
            TargetSize = Mathf.Clamp(TargetSize, MinZoom, MaxZoom);
            isZoom = true;
        });

      //这是切换大小地图
       btn_Scale.onClick.AddListener(delegate
        {
            RectTransform rect = Tran_MiniMap.GetComponent<RectTransform>();
            if (rect.rect.width == 436f)  //小的时候
            {
                TargetSize = 10f;
                rect.sizeDelta = new Vector2(436f * 3f, 436 * 3f);
                rect.anchoredPosition = new Vector2((Screen.width / 2f), -(Screen.height / 2f));

            }
            else
            {
                TargetSize = 5f;
                rect.sizeDelta = new Vector2(436f, 436f);
                rect.anchoredPosition = new Vector2(260f, -240f);
            }
            isZoom = true;
        });
    //这是移动渐变效果
      if (isZoom)
        {
            float target = MiniMapPersonCam.orthographicSize;
            target = Mathf.Lerp(target, TargetSize, 0.1f);
            target = Mathf.Clamp(target, MinZoom, MaxZoom);

            MiniMapPersonCam.orthographicSize = target;
            float c = Math.Abs(MiniMapPersonCam.orthographicSize - TargetSize);
            if (c <= 0.001f)
                isZoom = false;

        }

4.项目源码

文章最后也会附上 Demo下载地址