From d95f71b5e3bd87952cc2cb1e7faeb69b2d74b344 Mon Sep 17 00:00:00 2001
From: shenjianxing <”315615051@qq.com“>
Date: Tue, 6 May 2025 16:37:47 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BC=98=E5=8C=96=E7=94=BB=E7=BA=BF=E9=80=BB?=
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---
 Assets/Draw/Scripts/ScreenShotPainter.cs | 26 ++++++++++++++++--------
 1 file changed, 18 insertions(+), 8 deletions(-)

diff --git a/Assets/Draw/Scripts/ScreenShotPainter.cs b/Assets/Draw/Scripts/ScreenShotPainter.cs
index 0e7c4921..69da6734 100644
--- a/Assets/Draw/Scripts/ScreenShotPainter.cs
+++ b/Assets/Draw/Scripts/ScreenShotPainter.cs
@@ -7,7 +7,6 @@ using UnityEngine.Events;
 using UnityEngine.EventSystems;
 using UnityEngine.Rendering;
 using UnityEngine.UI;
-using static UnityEditor.Progress;
 
 [RequireComponent(typeof(Camera))]
 public class ScreenShotPainter : MonoBehaviour
@@ -621,6 +620,7 @@ public class ScreenShotPainter : MonoBehaviour
         ChangeToEraser(this.status == Status.Eraser);
     }
 
+    Vector2 lineStart = Vector2.zero;
     private void OnPaintBeginDrag(BaseEventData arg0)
     {
         if (_enabled && _haveRegion)
@@ -631,15 +631,15 @@ public class ScreenShotPainter : MonoBehaviour
                     break;
                 case Status.Line:
 
-                    if (Input.GetMouseButton(0))
+                    if (_currentLine == null)
                     {
-                        if (_currentLine == null)
-                        {
-                            _currentLine = new LineSegment(_paintBrushMat.GetColor("_Color"), _brushSize, _eraserFlag);
-                        }
-                        LerpPaint(Input.mousePosition, _eraserFlag);
+                        _currentLine = new LineSegment(_paintBrushMat.GetColor("_Color"), _brushSize, _eraserFlag);
+                        Graphics.Blit(_currentRenderTexture, _currentLine.Texture);
                     }
 
+                    lineStart = Input.mousePosition;
+                    _lastPoint = lineStart;
+
                     break;
 
                 case Status.Circle:
@@ -677,6 +677,16 @@ public class ScreenShotPainter : MonoBehaviour
                             }
                             LerpPaint(Input.mousePosition, _eraserFlag);
                             break;
+                        case Status.Line:
+                            if (_lastPoint != default && Vector2.Distance(lineStart, Input.mousePosition) > 2f)
+                            {
+                                Graphics.Blit(_currentLine.Texture, _currentRenderTexture);
+                                _paintCanvasImg.texture = _currentRenderTexture;
+                                _lastPoint = lineStart;
+                                Paint(_eraserFlag, lineStart);
+                                LerpPaint(Input.mousePosition, _eraserFlag);
+                            }
+                            break;
                         case Status.Rect:
                             Graphics.Blit(_currentLine.Texture, _currentRenderTexture);
                             _paintCanvasImg.texture = _currentRenderTexture;
@@ -709,8 +719,8 @@ public class ScreenShotPainter : MonoBehaviour
                 case Status.Line:
                     if (_currentLine != null)
                     {
-                        LerpPaint(Input.mousePosition, false);
                         FinishedRaw();
+                        lineStart = Vector2.zero;
                     }
                     break;