本文例項為大家分享了Unity相機移動之螢幕邊緣檢測的具體程式碼，供大家參考，具體內容如下

功能：

類似LOL 紅警 相機移動方式。

滑鼠移動到螢幕邊緣，相機隨之移動。

當然還有可以加億一點點細節，比如滑鼠指標變化，滾輪推進拉遠視野，中鍵平移視野等。（沒做）。

效果圖：

這裡做了視覺化資料（可以看到限定的螢幕距離），線框內為檢測的距離。

程式碼：

複製指令碼，直接掛載相機上就可以用。

using UnityEngine;
 
/// <summary>
/// 相機邊緣移動
/// </summary>
[RequireComponent(typeof(Camera))]
public class CameraScreenEdgeMove :MonoBehaviour
{
 
 
 [Header("使用邊緣移動")]
 public bool isUseMoveOnScreenEdge = true;
 
 /// <summary>
 /// 開啟除錯
 /// </summary>
 public bool isDebugScreenEdge = true;
 
 //移動速度
 public float moveSpeed = 1f;
 
 /// <summary>
 /// 距離螢幕邊緣多遠就開始移動相機
 /// </summary>
 public int ScreenEdgeSize = 20;
 
 private bool MoveUp;
 private bool MoveDown;
 private bool MoveRight;
 private bool MoveLeft;
 
 private Rect RigthRect;
 private Rect UpRect;
 private Rect DownRect;
 private Rect LeftRect;
 
 private Material mat;
 private Vector3 dir = Vector3.zero;
 
 private void Start()
 {
  CreateLineMaterial();
 }
 
 private void Update()
 {
  if (isUseMoveOnScreenEdge)
  {
   UpRect = new Rect(1f,Screen.height - ScreenEdgeSize,Screen.width,ScreenEdgeSize);
   DownRect = new Rect(1f,1f,ScreenEdgeSize);
 
   LeftRect = new Rect(1f,ScreenEdgeSize,Screen.height);
   RigthRect = new Rect(Screen.width - ScreenEdgeSize,Screen.height);
 
 
   MoveUp = (UpRect.Contains(Input.mousePosition));
   MoveDown = (DownRect.Contains(Input.mousePosition));
 
   MoveLeft = (LeftRect.Contains(Input.mousePosition));
   MoveRight = (RigthRect.Contains(Input.mousePosition));
 
   dir.z = MoveUp ? 1 : MoveDown ? -1 : 0;
   dir.x = MoveLeft ? -1 : MoveRight ? 1 : 0;
 
   transform.position = Vector3.Lerp(transform.position,transform.position + dir * moveSpeed,Time.deltaTime);
  
  }
 }
 
 
 void CreateLineMaterial()
 {
  if (!mat)
  {
   Shader shader = Shader.Find("Hidden/Internal-Colored");
   mat = new Material(shader);
   mat.hideFlags = HideFlags.HideAndDontSave;
   mat.SetInt("_SrcBlend",(int)UnityEngine.Rendering.BlendMode.SrcAlpha);
   mat.SetInt("_DstBlend",(int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
   mat.SetInt("_Cull",(int)UnityEngine.Rendering.CullMode.Off);
   mat.SetInt("_ZWrite",0);
  }
 }
 
 void OnPostRender()
 {
  if (isUseMoveOnScreenEdge && isDebugScreenEdge)
  {
   DrawRect(UpRect,MoveUp,Color.cyan,Color.red); 
   DrawRect(DownRect,MoveDown,Color.green,Color.red); 
   DrawRect(LeftRect,MoveLeft,Color.yellow,Color.red); 
   DrawRect(RigthRect,MoveRight,Color.blue,Color.red); 
  }
 }
 
 private void DrawRect(Rect rect,bool isMouseEnter,Color normalColor,Color HeighLightColor)
 {
  if (isMouseEnter)
  {
   DrawScreenRect(rect,HeighLightColor);
  }
  else
  {
   DrawScreenRect(rect,normalColor);
  }
 }
 
 private void DrawScreenRect(Rect rect,Color color)
 {
  GL.LoadOrtho();
  GL.Begin(GL.LINES);
  {
   mat.SetPass(0);
   GL.Color(color);
   GL.Vertex3(rect.xMin / Screen.width,rect.yMin / Screen.height,0);
   GL.Vertex3(rect.xMin / Screen.width,rect.yMax / Screen.height,0);
 
   GL.Vertex3(rect.xMin / Screen.width,0);
   GL.Vertex3(rect.xMax / Screen.width,0);
 
   GL.Vertex3(rect.xMax / Screen.width,0);
   
  }
  GL.End();
 }
 
}

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支援我們。