1.修复了一些错误\n2.导入了URP的Sample

Assets/Samples/Universal RP/14.0.11/URP Package Samples/LensFlares/Scripts/ScreenSpacePlacement.cs

@@ -0,0 +1,36 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+[ExecuteAlways]
+public class ScreenSpacePlacement : MonoBehaviour
+{
+    [SerializeField]
+    private Camera m_Cam;
+    [SerializeField]
+    private Transform m_FlareObject;
+
+    private bool m_MouseDown;
+
+    void OnGUI()
+    {
+        Event currentEvent = Event.current;
+        Vector2 mousePos = new Vector2();
+
+        if (currentEvent.type == EventType.MouseDown) m_MouseDown = true;
+        if (currentEvent.type == EventType.MouseUp) m_MouseDown = false;
+
+        mousePos.x = currentEvent.mousePosition.x;
+        mousePos.y = m_Cam.pixelHeight - currentEvent.mousePosition.y;
+
+        if (m_FlareObject != null && mousePos.x > 0 && mousePos.y > 0 && mousePos.x < m_Cam.pixelWidth && mousePos.y < m_Cam.pixelHeight)
+        {
+            Vector3 point = m_Cam.ScreenToWorldPoint(new Vector3(mousePos.x, mousePos.y, m_Cam.nearClipPlane));
+
+            if (m_MouseDown)
+            {
+                m_FlareObject.position = point;
+            }
+        }
+    }
+}