新增箭头绘制功能

Assets/Art/UIPrefab/UIDraw.prefab

@@ -7670,7 +7670,7 @@ MonoBehaviour:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 8470605304935464912}
-  m_Enabled: 0
+  m_Enabled: 1
   m_EditorHideFlags: 0
   m_Script: {fileID: 11500000, guid: fe87c0e1cc204ed48ad3b37840f39efc, type: 3}
   m_Name: 
@@ -7748,7 +7748,7 @@ MonoBehaviour:
     m_PressedTrigger: Pressed
     m_SelectedTrigger: Selected
     m_DisabledTrigger: Disabled
-  m_Interactable: 0
+  m_Interactable: 1
   m_TargetGraphic: {fileID: 8708082608090175244}
   toggleTransition: 1
   graphic: {fileID: 1510141012094268438}

Assets/Draw/Scripts/ScreenShotPainter.cs

@@ -213,6 +213,7 @@ public class ScreenShotPainter : MonoBehaviour
         Line,
         Rect,
         Circle,
+        Arrow,
     }
     public EnterCaptureModeEvent EnterCaptureModeEvent
     {
@@ -654,6 +655,12 @@ public class ScreenShotPainter : MonoBehaviour
                     Graphics.Blit(_currentRenderTexture, _currentLine.Texture);
                     _lastPoint = Input.mousePosition;
                     break;
+                case Status.Arrow:
+                    _currentLine = new LineSegment(_paintBrushMat.GetColor("_Color"), _brushSize, _eraserFlag);
+                    Graphics.Blit(_currentRenderTexture, _currentLine.Texture);
+                    lineStart = Input.mousePosition;
+                    _lastPoint = lineStart;
+                    break;
             }
         }
     }
@@ -696,6 +703,11 @@ public class ScreenShotPainter : MonoBehaviour
                             var dis = Vector2.Distance(_lastPoint, Input.mousePosition) * 2;
                             circleImg.rectTransform.sizeDelta = new Vector2(dis, dis);
                             break;
+                        case Status.Arrow:
+                            Graphics.Blit(_currentLine.Texture, _currentRenderTexture);
+                            _paintCanvasImg.texture = _currentRenderTexture;
+                            ArrowFactory();
+                            break;
 
                     }
                 }
@@ -725,7 +737,8 @@ public class ScreenShotPainter : MonoBehaviour
                     break;
 
                 case Status.Rect:
-                    FinishedRaw();
+                    if (_currentLine != null)
+                        FinishedRaw();
                     break;
 
                 case Status.Circle:
@@ -746,6 +759,13 @@ public class ScreenShotPainter : MonoBehaviour
                     }
                     break;
 
+                case Status.Arrow:
+                    if (_currentLine != null)
+                    {
+                        FinishedRaw();
+                        lineStart = Vector2.zero;
+                    }
+                    break;
                 default:
                     break;
             }
@@ -797,6 +817,19 @@ public class ScreenShotPainter : MonoBehaviour
             //FinishedRaw();
         }
     }
+    public void ArrowFactory()
+    {
+        if (lineStart != default)
+        {
+            var points = GenerateArrowPoints(lineStart, Input.mousePosition,0.1f);
+            _lastPoint = lineStart;
+            Paint(_eraserFlag, lineStart);
+            LerpPaint(Input.mousePosition, _eraserFlag);
+            LerpPaint(points[1], false);
+            _lastPoint = Input.mousePosition;
+            LerpPaint(points[3], false);
+        }
+    }
 
     public Vector2[] GenerateRectanglePoints(Vector2 start, Vector2 thirdPoint)
     {
@@ -840,6 +873,31 @@ public class ScreenShotPainter : MonoBehaviour
     }
 
 
+
+    public Vector2[] GenerateArrowPoints(Vector2 start, Vector2 end, float arrowWidth = 0.3f, float arrowHeadLength = 0.2f)
+    {
+        Vector2[] points = new Vector2[4];
+
+        // 计算方向向量
+        Vector2 direction = end - start;
+        float length = direction.magnitude;
+        Vector2 normalizedDir = direction.normalized;
+
+        // 计算箭头头部的基准点（箭头左右两侧点所在的位置）
+        Vector2 arrowBase = end - normalizedDir * length * arrowHeadLength;
+
+        // 计算垂直于方向的向量（用于确定箭头宽度）
+        Vector2 perpendicular = new Vector2(-normalizedDir.y, normalizedDir.x) * length * arrowWidth;
+
+        // 箭头四个点的位置
+        points[0] = start; // 箭尾
+        points[1] = arrowBase - perpendicular; // 箭头左侧点
+        points[2] = end; // 箭头顶点
+        points[3] = arrowBase + perpendicular; // 箭头右侧点
+
+        return points;
+    }
+
     public void Clear()
     {
         // 重新分配 RenderTexture

Assets/Scripts/UI/UIDraw.cs

@@ -124,6 +124,15 @@ namespace QFramework.Example
                 }
             });
 
+
+            Arrow.onValueChanged.AddListener(isOn =>
+            {
+                if (isOn)
+                {
+                    ScreenShotPainter.instance.SetStatus(ScreenShotPainter.Status.Arrow);
+                }
+            });
+
             ColorAreaBtn.onClick.AddListener(() =>
             {
                 ColorArea.gameObject.SetActive(true);