2570 lines
114 KiB
C#
2570 lines
114 KiB
C#
using Ink_Canvas.Helpers;
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Threading.Tasks;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Ink;
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using System.Windows.Input;
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using System.Windows.Media;
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using System.Windows.Threading;
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using Point = System.Windows.Point;
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namespace Ink_Canvas
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{
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/// <summary>
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/// 主窗口类的部分类，包含压感模拟和墨水到形状识别的功能
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/// </summary>
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/// <remarks>
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/// 本文件主要包含以下功能：
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/// 1. 压感模拟：根据输入设备类型和设置模拟不同的压感效果
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/// 2. 墨水到形状识别：将手绘墨迹转换为规则形状（直线、圆形、椭圆、三角形、矩形等）
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/// 3. 直线自动拉直：将近似直线的墨迹自动拉成直线
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/// 4. 端点吸附：将直线端点吸附到其他直线的端点
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/// 5. 矩形参考线系统：通过多条直线构成矩形
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/// 6. 高级贝塞尔曲线平滑：对墨迹进行平滑处理
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/// 7. 异步墨水处理：提高性能的异步墨水处理机制
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/// </remarks>
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public partial class MainWindow : Window
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{
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/// <summary>
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/// 存储新的笔画集合，用于形状识别
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/// </summary>
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private StrokeCollection newStrokes = new StrokeCollection();
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/// <summary>
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/// 存储圆形形状的列表
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/// </summary>
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private List<Circle> circles = new List<Circle>();
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/// <summary>
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/// 矩形参考线的列表
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/// </summary>
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private List<RectangleGuideLine> rectangleGuideLines = new List<RectangleGuideLine>();
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/// <summary>
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/// 矩形端点的阈值
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/// </summary>
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private const double RECTANGLE_ENDPOINT_THRESHOLD = 30.0;
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/// <summary>
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/// 矩形角度的阈值
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/// </summary>
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private const double RECTANGLE_ANGLE_THRESHOLD = 15.0;
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/// <summary>
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/// 矩形参考线类，用于辅助矩形绘制
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/// </summary>
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private class RectangleGuideLine
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{
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/// <summary>
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/// 原始笔画
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/// </summary>
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public Stroke OriginalStroke { get; set; }
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/// <summary>
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/// 起始点
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/// </summary>
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public Point StartPoint { get; set; }
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/// <summary>
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/// 结束点
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/// </summary>
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public Point EndPoint { get; set; }
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/// <summary>
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/// 创建时间
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/// </summary>
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public DateTime CreatedTime { get; set; }
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/// <summary>
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/// 角度
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/// </summary>
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public double Angle { get; set; }
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/// <summary>
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/// 是否为水平线
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/// </summary>
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public bool IsHorizontal { get; set; }
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/// <summary>
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/// 是否为垂直线
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/// </summary>
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public bool IsVertical { get; set; }
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/// <summary>
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/// 构造函数
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/// </summary>
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/// <param name="stroke">原始笔画</param>
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/// <param name="start">起始点</param>
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/// <param name="end">结束点</param>
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public RectangleGuideLine(Stroke stroke, Point start, Point end)
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{
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OriginalStroke = stroke;
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StartPoint = start;
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EndPoint = end;
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CreatedTime = DateTime.Now;
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// 计算角度
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double deltaX = end.X - start.X;
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double deltaY = end.Y - start.Y;
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Angle = Math.Atan2(deltaY, deltaX);
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// 判断是否为水平或垂直线
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double angleDegrees = Math.Abs(Angle * 180.0 / Math.PI);
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IsHorizontal = angleDegrees < RECTANGLE_ANGLE_THRESHOLD || angleDegrees > (180 - RECTANGLE_ANGLE_THRESHOLD);
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IsVertical = Math.Abs(angleDegrees - 90) < RECTANGLE_ANGLE_THRESHOLD;
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}
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}
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/// <summary>
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/// 处理墨水画布的笔画收集事件
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/// </summary>
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/// <param name="sender">事件发送者</param>
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/// <param name="e">笔画收集事件参数</param>
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/// <remarks>
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/// 当用户在墨水画布上完成一笔绘制后：
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/// 1. 检查是否启用墨迹渐隐功能，如果启用则添加到墨迹渐隐管理器
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/// 2. 根据设置处理压感：
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/// - 如果禁用压感，统一压感值为0.5
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/// - 如果启用触摸压感模式，根据速度模拟压感
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/// 3. 如果启用了形状识别：
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/// - 检查是否启用了直线自动拉直功能，如果是则尝试拉直线条
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/// - 处理形状识别，包括圆形、椭圆、三角形、矩形等
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/// 4. 检查是否是压感笔书写，如果是则返回
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/// 5. 根据墨水风格设置模拟压感
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/// 6. 应用高级贝塞尔曲线平滑（仅在未进行直线拉直时）
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/// <para>
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/// 注意：形状识别（圆形、椭圆、三角形、矩形等）仅在32位进程中可用。当 Environment.Is64BitProcess 为 true 时，形状识别功能会被禁用。
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/// </para>
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/// </remarks>
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private void inkCanvas_StrokeCollected(object sender, InkCanvasStrokeCollectedEventArgs e)
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{
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// 检查是否启用墨迹渐隐功能
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if (Settings.Canvas.EnableInkFade)
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{
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// 获取墨迹的起点和终点
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var startPoint = e.Stroke.StylusPoints.Count > 0 ? e.Stroke.StylusPoints[0].ToPoint() : new Point();
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var endPoint = e.Stroke.StylusPoints.Count > 0 ? e.Stroke.StylusPoints[e.Stroke.StylusPoints.Count - 1].ToPoint() : new Point();
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if (inkCanvas.EditingMode != InkCanvasEditingMode.Ink)
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{
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inkCanvas.EditingMode = InkCanvasEditingMode.Ink;
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}
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// 添加到墨迹渐隐管理器
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if (_inkFadeManager != null)
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{
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_inkFadeManager.AddFadingStroke(e.Stroke, startPoint, endPoint);
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}
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else
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{
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LogHelper.WriteLogToFile("StrokeCollected: 墨迹渐隐管理器为空，无法添加墨迹", LogHelper.LogType.Error);
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}
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Dispatcher.BeginInvoke(new Action(() =>
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{
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try
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{
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if (inkCanvas.EditingMode != InkCanvasEditingMode.Ink)
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{
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inkCanvas.EditingMode = InkCanvasEditingMode.Ink;
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}
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if (inkCanvas.Strokes.Contains(e.Stroke))
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{
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inkCanvas.Strokes.Remove(e.Stroke);
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}
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}
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catch (Exception ex)
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{
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LogHelper.WriteLogToFile($"延迟移除墨迹时出错: {ex}", LogHelper.LogType.Error);
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}
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}), DispatcherPriority.Background);
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return;
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}
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// 标记是否进行了直线拉直
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bool wasStraightened = false;
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if (Settings.Canvas.FitToCurve) drawingAttributes.FitToCurve = false;
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try
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{
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inkCanvas.Opacity = 1;
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if (Settings.Canvas.DisablePressure)
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{
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var uniformPoints = new StylusPointCollection();
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foreach (StylusPoint point in e.Stroke.StylusPoints)
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{
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StylusPoint newPoint = new StylusPoint(point.X, point.Y, 0.5f); // 统一压感值为0.5
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uniformPoints.Add(newPoint);
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}
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e.Stroke.StylusPoints = uniformPoints;
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}
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else if (Settings.Canvas.EnablePressureTouchMode)
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{
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bool isTouchInput = true;
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foreach (StylusPoint point in e.Stroke.StylusPoints)
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{
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if ((point.PressureFactor > 0.501 || point.PressureFactor < 0.5) && point.PressureFactor != 0)
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{
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isTouchInput = false;
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break;
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}
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}
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if (isTouchInput)
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{
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switch (Settings.Canvas.InkStyle)
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{
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case 1:
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if (penType == 0)
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try
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{
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var stylusPoints = new StylusPointCollection();
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var n = e.Stroke.StylusPoints.Count - 1;
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for (var i = 0; i <= n; i++)
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{
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var speed = GetPointSpeed(e.Stroke.StylusPoints[Math.Max(i - 1, 0)].ToPoint(),
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e.Stroke.StylusPoints[i].ToPoint(),
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e.Stroke.StylusPoints[Math.Min(i + 1, n)].ToPoint());
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var point = new StylusPoint();
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if (speed >= 0.25)
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point.PressureFactor = (float)(0.5 - 0.3 * (Math.Min(speed, 1.5) - 0.3) / 1.2);
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else if (speed >= 0.05)
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point.PressureFactor = (float)0.5;
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else
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point.PressureFactor = (float)(0.5 + 0.4 * (0.05 - speed) / 0.05);
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point.X = e.Stroke.StylusPoints[i].X;
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point.Y = e.Stroke.StylusPoints[i].Y;
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stylusPoints.Add(point);
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}
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e.Stroke.StylusPoints = stylusPoints;
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}
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catch (Exception ex) { System.Diagnostics.Debug.WriteLine(ex); }
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break;
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case 0:
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if (penType == 0)
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try
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{
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var stylusPoints = new StylusPointCollection();
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var n = e.Stroke.StylusPoints.Count - 1;
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var pressure = 0.1;
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var x = 10;
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if (n == 1) return;
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if (n >= x)
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{
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for (var i = 0; i < n - x; i++)
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{
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var point = new StylusPoint();
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point.PressureFactor = (float)0.5;
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point.X = e.Stroke.StylusPoints[i].X;
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point.Y = e.Stroke.StylusPoints[i].Y;
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stylusPoints.Add(point);
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}
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for (var i = n - x; i <= n; i++)
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{
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var point = new StylusPoint();
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point.PressureFactor = (float)((0.5 - pressure) * (n - i) / x + pressure);
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point.X = e.Stroke.StylusPoints[i].X;
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point.Y = e.Stroke.StylusPoints[i].Y;
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stylusPoints.Add(point);
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}
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}
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else
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{
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for (var i = 0; i <= n; i++)
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{
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var point = new StylusPoint();
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point.PressureFactor = (float)(0.4 * (n - i) / n + pressure);
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point.X = e.Stroke.StylusPoints[i].X;
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point.Y = e.Stroke.StylusPoints[i].Y;
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stylusPoints.Add(point);
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}
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}
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e.Stroke.StylusPoints = stylusPoints;
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}
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catch (Exception ex) { System.Diagnostics.Debug.WriteLine(ex); }
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break;
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}
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}
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}
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// Apply line straightening and endpoint snapping if ink-to-shape is enabled
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if (Settings.InkToShape.IsInkToShapeEnabled)
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{
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// 检查是否启用了直线自动拉直功能
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if (Settings.Canvas.AutoStraightenLine && IsPotentialStraightLine(e.Stroke))
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{
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Point endpoint1, endpoint2;
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bool shouldStraighten = TryGetStraightLineEndpoints(e.Stroke, out endpoint1, out endpoint2);
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if (shouldStraighten)
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{
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Point startPoint = endpoint1;
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Point endPoint = endpoint2;
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// 只有当确定要拉直线条时，才检查端点吸附
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if (Settings.Canvas.LineEndpointSnapping)
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{
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// 只有在启用了形状识别（矩形或三角形）时才执行端点吸附
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if (Settings.InkToShape.IsInkToShapeRectangle || Settings.InkToShape.IsInkToShapeTriangle)
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{
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Point[] snappedPoints = GetSnappedEndpoints(startPoint, endPoint);
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if (snappedPoints != null)
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{
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startPoint = snappedPoints[0];
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endPoint = snappedPoints[1];
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}
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}
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}
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// 创建直线
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StylusPointCollection straightLinePoints = CreateStraightLine(startPoint, endPoint);
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Stroke straightStroke = new Stroke(straightLinePoints)
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{
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DrawingAttributes = inkCanvas.DefaultDrawingAttributes.Clone()
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};
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// Replace the original stroke with the straightened one
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SetNewBackupOfStroke();
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_currentCommitType = CommitReason.ShapeRecognition;
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inkCanvas.Strokes.Remove(e.Stroke);
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inkCanvas.Strokes.Add(straightStroke);
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_currentCommitType = CommitReason.UserInput;
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// We can't modify e.Stroke directly, but we need to update newStrokes
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// to ensure proper shape recognition for the straightened line
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if (newStrokes.Contains(e.Stroke))
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{
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newStrokes.Remove(e.Stroke);
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newStrokes.Add(straightStroke);
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}
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wasStraightened = true; // 标记已进行直线拉直
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}
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}
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}
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if (Settings.InkToShape.IsInkToShapeEnabled && !Environment.Is64BitProcess)
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{
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void InkToShapeProcess()
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{
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try
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{
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newStrokes.Add(e.Stroke);
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if (newStrokes.Count > 4) newStrokes.RemoveAt(0);
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for (var i = 0; i < newStrokes.Count; i++)
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if (!inkCanvas.Strokes.Contains(newStrokes[i]))
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newStrokes.RemoveAt(i--);
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for (var i = 0; i < circles.Count; i++)
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if (!inkCanvas.Strokes.Contains(circles[i].Stroke))
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circles.RemoveAt(i);
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// 处理矩形参考线系统
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ProcessRectangleGuideLines(e.Stroke);
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var strokeReco = new StrokeCollection();
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var result = InkRecognizeHelper.RecognizeShape(newStrokes);
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for (var i = newStrokes.Count - 1; i >= 0; i--)
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{
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strokeReco.Add(newStrokes[i]);
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var newResult = InkRecognizeHelper.RecognizeShape(strokeReco);
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if (newResult.InkDrawingNode.GetShapeName() == "Circle" ||
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newResult.InkDrawingNode.GetShapeName() == "Ellipse")
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{
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result = newResult;
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break;
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}
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//Label.Visibility = Visibility.Visible;
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//Label.Content = circles.Count.ToString() + "\n" + newResult.InkDrawingNode.GetShapeName();
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}
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if (result.InkDrawingNode.GetShapeName() == "Circle" &&
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Settings.InkToShape.IsInkToShapeRounded)
|
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{
|
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var shape = result.InkDrawingNode.GetShape();
|
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if (shape.Width > 75)
|
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{
|
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foreach (var circle in circles)
|
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//判断是否画同心圆
|
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if (Math.Abs(result.Centroid.X - circle.Centroid.X) / shape.Width < 0.12 &&
|
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Math.Abs(result.Centroid.Y - circle.Centroid.Y) / shape.Width < 0.12)
|
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{
|
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result.Centroid = circle.Centroid;
|
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break;
|
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}
|
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else
|
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{
|
||
var d = (result.Centroid.X - circle.Centroid.X) *
|
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(result.Centroid.X - circle.Centroid.X) +
|
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(result.Centroid.Y - circle.Centroid.Y) *
|
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(result.Centroid.Y - circle.Centroid.Y);
|
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d = Math.Sqrt(d);
|
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//判断是否画外切圆
|
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var x = shape.Width / 2.0 + circle.R - d;
|
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if (Math.Abs(x) / shape.Width < 0.1)
|
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{
|
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var sinTheta = (result.Centroid.Y - circle.Centroid.Y) / d;
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var cosTheta = (result.Centroid.X - circle.Centroid.X) / d;
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var newX = result.Centroid.X + x * cosTheta;
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var newY = result.Centroid.Y + x * sinTheta;
|
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result.Centroid = new Point(newX, newY);
|
||
}
|
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//判断是否画外切圆
|
||
x = Math.Abs(circle.R - shape.Width / 2.0) - d;
|
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if (Math.Abs(x) / shape.Width < 0.1)
|
||
{
|
||
var sinTheta = (result.Centroid.Y - circle.Centroid.Y) / d;
|
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var cosTheta = (result.Centroid.X - circle.Centroid.X) / d;
|
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var newX = result.Centroid.X + x * cosTheta;
|
||
var newY = result.Centroid.Y + x * sinTheta;
|
||
result.Centroid = new Point(newX, newY);
|
||
}
|
||
}
|
||
|
||
var iniP = new Point(result.Centroid.X - shape.Width / 2,
|
||
result.Centroid.Y - shape.Height / 2);
|
||
var endP = new Point(result.Centroid.X + shape.Width / 2,
|
||
result.Centroid.Y + shape.Height / 2);
|
||
var pointList = GenerateEllipseGeometry(iniP, endP);
|
||
var point = new StylusPointCollection(pointList);
|
||
var stroke = new Stroke(point)
|
||
{
|
||
DrawingAttributes = inkCanvas.DefaultDrawingAttributes.Clone()
|
||
};
|
||
circles.Add(new Circle(result.Centroid, shape.Width / 2.0, stroke));
|
||
SetNewBackupOfStroke();
|
||
_currentCommitType = CommitReason.ShapeRecognition;
|
||
inkCanvas.Strokes.Remove(result.InkDrawingNode.Strokes);
|
||
inkCanvas.Strokes.Add(stroke);
|
||
_currentCommitType = CommitReason.UserInput;
|
||
newStrokes = new StrokeCollection();
|
||
}
|
||
}
|
||
else if (result.InkDrawingNode.GetShapeName().Contains("Ellipse") &&
|
||
Settings.InkToShape.IsInkToShapeRounded)
|
||
{
|
||
var shape = result.InkDrawingNode.GetShape();
|
||
//var shape1 = result.InkDrawingNode.GetShape();
|
||
//shape1.Fill = Brushes.Gray;
|
||
//Canvas.Children.Add(shape1);
|
||
var p = result.InkDrawingNode.HotPoints;
|
||
var a = GetDistance(p[0], p[2]) / 2; //长半轴
|
||
var b = GetDistance(p[1], p[3]) / 2; //短半轴
|
||
if (a < b)
|
||
{
|
||
var t = a;
|
||
a = b;
|
||
b = t;
|
||
}
|
||
|
||
result.Centroid = new Point((p[0].X + p[2].X) / 2, (p[0].Y + p[2].Y) / 2);
|
||
var needRotation = true;
|
||
|
||
if (shape.Width > 75 || (shape.Height > 75 && p.Count == 4))
|
||
{
|
||
var iniP = new Point(result.Centroid.X - shape.Width / 2,
|
||
result.Centroid.Y - shape.Height / 2);
|
||
var endP = new Point(result.Centroid.X + shape.Width / 2,
|
||
result.Centroid.Y + shape.Height / 2);
|
||
|
||
foreach (var circle in circles)
|
||
//判断是否画同心椭圆
|
||
if (Math.Abs(result.Centroid.X - circle.Centroid.X) / a < 0.2 &&
|
||
Math.Abs(result.Centroid.Y - circle.Centroid.Y) / a < 0.2)
|
||
{
|
||
result.Centroid = circle.Centroid;
|
||
iniP = new Point(result.Centroid.X - shape.Width / 2,
|
||
result.Centroid.Y - shape.Height / 2);
|
||
endP = new Point(result.Centroid.X + shape.Width / 2,
|
||
result.Centroid.Y + shape.Height / 2);
|
||
|
||
//再判断是否与圆相切
|
||
if (Math.Abs(a - circle.R) / a < 0.2)
|
||
{
|
||
if (shape.Width >= shape.Height)
|
||
{
|
||
iniP.X = result.Centroid.X - circle.R;
|
||
endP.X = result.Centroid.X + circle.R;
|
||
iniP.Y = result.Centroid.Y - b;
|
||
endP.Y = result.Centroid.Y + b;
|
||
}
|
||
else
|
||
{
|
||
iniP.Y = result.Centroid.Y - circle.R;
|
||
endP.Y = result.Centroid.Y + circle.R;
|
||
iniP.X = result.Centroid.X - a;
|
||
endP.X = result.Centroid.X + a;
|
||
}
|
||
}
|
||
|
||
break;
|
||
}
|
||
else if (Math.Abs(result.Centroid.X - circle.Centroid.X) / a < 0.2)
|
||
{
|
||
var sinTheta = Math.Abs(circle.Centroid.Y - result.Centroid.Y) /
|
||
circle.R;
|
||
var cosTheta = Math.Sqrt(1 - sinTheta * sinTheta);
|
||
var newA = circle.R * cosTheta;
|
||
if (circle.R * sinTheta / circle.R < 0.9 && a / b > 2 &&
|
||
Math.Abs(newA - a) / newA < 0.3)
|
||
{
|
||
iniP.X = circle.Centroid.X - newA;
|
||
endP.X = circle.Centroid.X + newA;
|
||
iniP.Y = result.Centroid.Y - newA / 5;
|
||
endP.Y = result.Centroid.Y + newA / 5;
|
||
|
||
var topB = endP.Y - iniP.Y;
|
||
|
||
SetNewBackupOfStroke();
|
||
_currentCommitType = CommitReason.ShapeRecognition;
|
||
inkCanvas.Strokes.Remove(result.InkDrawingNode.Strokes);
|
||
newStrokes = new StrokeCollection();
|
||
|
||
var _pointList = GenerateEllipseGeometry(iniP, endP, false);
|
||
var _point = new StylusPointCollection(_pointList);
|
||
var _stroke = new Stroke(_point)
|
||
{
|
||
DrawingAttributes = inkCanvas.DefaultDrawingAttributes.Clone()
|
||
};
|
||
var _dashedLineStroke =
|
||
GenerateDashedLineEllipseStrokeCollection(iniP, endP, true, false);
|
||
var strokes = new StrokeCollection {
|
||
_stroke,
|
||
_dashedLineStroke
|
||
};
|
||
inkCanvas.Strokes.Add(strokes);
|
||
_currentCommitType = CommitReason.UserInput;
|
||
return;
|
||
}
|
||
}
|
||
else if (Math.Abs(result.Centroid.Y - circle.Centroid.Y) / a < 0.2)
|
||
{
|
||
var cosTheta = Math.Abs(circle.Centroid.X - result.Centroid.X) /
|
||
circle.R;
|
||
var sinTheta = Math.Sqrt(1 - cosTheta * cosTheta);
|
||
var newA = circle.R * sinTheta;
|
||
if (circle.R * sinTheta / circle.R < 0.9 && a / b > 2 &&
|
||
Math.Abs(newA - a) / newA < 0.3)
|
||
{
|
||
iniP.X = result.Centroid.X - newA / 5;
|
||
endP.X = result.Centroid.X + newA / 5;
|
||
iniP.Y = circle.Centroid.Y - newA;
|
||
endP.Y = circle.Centroid.Y + newA;
|
||
needRotation = false;
|
||
}
|
||
}
|
||
|
||
//纠正垂直与水平关系
|
||
var newPoints = FixPointsDirection(p[0], p[2]);
|
||
p[0] = newPoints[0];
|
||
p[2] = newPoints[1];
|
||
newPoints = FixPointsDirection(p[1], p[3]);
|
||
p[1] = newPoints[0];
|
||
p[3] = newPoints[1];
|
||
|
||
var pointList = GenerateEllipseGeometry(iniP, endP);
|
||
var point = new StylusPointCollection(pointList);
|
||
var stroke = new Stroke(point)
|
||
{
|
||
DrawingAttributes = inkCanvas.DefaultDrawingAttributes.Clone()
|
||
};
|
||
|
||
if (needRotation)
|
||
{
|
||
var m = new Matrix();
|
||
var fe = e.Source as FrameworkElement;
|
||
var tanTheta = (p[2].Y - p[0].Y) / (p[2].X - p[0].X);
|
||
var theta = Math.Atan(tanTheta);
|
||
m.RotateAt(theta * 180.0 / Math.PI, result.Centroid.X, result.Centroid.Y);
|
||
stroke.Transform(m, false);
|
||
}
|
||
|
||
SetNewBackupOfStroke();
|
||
_currentCommitType = CommitReason.ShapeRecognition;
|
||
inkCanvas.Strokes.Remove(result.InkDrawingNode.Strokes);
|
||
inkCanvas.Strokes.Add(stroke);
|
||
_currentCommitType = CommitReason.UserInput;
|
||
GridInkCanvasSelectionCover.Visibility = Visibility.Collapsed;
|
||
newStrokes = new StrokeCollection();
|
||
}
|
||
}
|
||
else if (result.InkDrawingNode.GetShapeName().Contains("Triangle") &&
|
||
Settings.InkToShape.IsInkToShapeTriangle)
|
||
{
|
||
var shape = result.InkDrawingNode.GetShape();
|
||
var p = result.InkDrawingNode.HotPoints;
|
||
if ((Math.Max(Math.Max(p[0].X, p[1].X), p[2].X) -
|
||
Math.Min(Math.Min(p[0].X, p[1].X), p[2].X) >= 100 ||
|
||
Math.Max(Math.Max(p[0].Y, p[1].Y), p[2].Y) -
|
||
Math.Min(Math.Min(p[0].Y, p[1].Y), p[2].Y) >= 100) &&
|
||
result.InkDrawingNode.HotPoints.Count == 3)
|
||
{
|
||
//纠正垂直与水平关系
|
||
var newPoints = FixPointsDirection(p[0], p[1]);
|
||
p[0] = newPoints[0];
|
||
p[1] = newPoints[1];
|
||
newPoints = FixPointsDirection(p[0], p[2]);
|
||
p[0] = newPoints[0];
|
||
p[2] = newPoints[1];
|
||
newPoints = FixPointsDirection(p[1], p[2]);
|
||
p[1] = newPoints[0];
|
||
p[2] = newPoints[1];
|
||
|
||
var pointList = p.ToList();
|
||
//pointList.Add(p[0]);
|
||
var point = new StylusPointCollection(pointList);
|
||
var stroke = new Stroke(GenerateFakePressureTriangle(point))
|
||
{
|
||
DrawingAttributes = inkCanvas.DefaultDrawingAttributes.Clone()
|
||
};
|
||
SetNewBackupOfStroke();
|
||
_currentCommitType = CommitReason.ShapeRecognition;
|
||
inkCanvas.Strokes.Remove(result.InkDrawingNode.Strokes);
|
||
inkCanvas.Strokes.Add(stroke);
|
||
_currentCommitType = CommitReason.UserInput;
|
||
GridInkCanvasSelectionCover.Visibility = Visibility.Collapsed;
|
||
newStrokes = new StrokeCollection();
|
||
}
|
||
}
|
||
else if ((result.InkDrawingNode.GetShapeName().Contains("Rectangle") ||
|
||
result.InkDrawingNode.GetShapeName().Contains("Diamond") ||
|
||
result.InkDrawingNode.GetShapeName().Contains("Parallelogram") ||
|
||
result.InkDrawingNode.GetShapeName().Contains("Square") ||
|
||
result.InkDrawingNode.GetShapeName().Contains("Trapezoid")) &&
|
||
Settings.InkToShape.IsInkToShapeRectangle)
|
||
{
|
||
var shape = result.InkDrawingNode.GetShape();
|
||
var p = result.InkDrawingNode.HotPoints;
|
||
if ((Math.Max(Math.Max(Math.Max(p[0].X, p[1].X), p[2].X), p[3].X) -
|
||
Math.Min(Math.Min(Math.Min(p[0].X, p[1].X), p[2].X), p[3].X) >= 100 ||
|
||
Math.Max(Math.Max(Math.Max(p[0].Y, p[1].Y), p[2].Y), p[3].Y) -
|
||
Math.Min(Math.Min(Math.Min(p[0].Y, p[1].Y), p[2].Y), p[3].Y) >= 100) &&
|
||
result.InkDrawingNode.HotPoints.Count == 4)
|
||
{
|
||
//纠正垂直与水平关系
|
||
var newPoints = FixPointsDirection(p[0], p[1]);
|
||
p[0] = newPoints[0];
|
||
p[1] = newPoints[1];
|
||
newPoints = FixPointsDirection(p[1], p[2]);
|
||
p[1] = newPoints[0];
|
||
p[2] = newPoints[1];
|
||
newPoints = FixPointsDirection(p[2], p[3]);
|
||
p[2] = newPoints[0];
|
||
p[3] = newPoints[1];
|
||
newPoints = FixPointsDirection(p[3], p[0]);
|
||
p[3] = newPoints[0];
|
||
p[0] = newPoints[1];
|
||
|
||
var pointList = p.ToList();
|
||
pointList.Add(p[0]);
|
||
var point = new StylusPointCollection(pointList);
|
||
var stroke = new Stroke(GenerateFakePressureRectangle(point))
|
||
{
|
||
DrawingAttributes = inkCanvas.DefaultDrawingAttributes.Clone()
|
||
};
|
||
SetNewBackupOfStroke();
|
||
_currentCommitType = CommitReason.ShapeRecognition;
|
||
inkCanvas.Strokes.Remove(result.InkDrawingNode.Strokes);
|
||
inkCanvas.Strokes.Add(stroke);
|
||
_currentCommitType = CommitReason.UserInput;
|
||
GridInkCanvasSelectionCover.Visibility = Visibility.Collapsed;
|
||
newStrokes = new StrokeCollection();
|
||
}
|
||
}
|
||
}
|
||
catch (Exception ex) { System.Diagnostics.Debug.WriteLine(ex); }
|
||
}
|
||
|
||
InkToShapeProcess();
|
||
}
|
||
|
||
foreach (var stylusPoint in e.Stroke.StylusPoints)
|
||
//LogHelper.WriteLogToFile(stylusPoint.PressureFactor.ToString(), LogHelper.LogType.Info);
|
||
// 检查是否是压感笔书写
|
||
//if (stylusPoint.PressureFactor != 0.5 && stylusPoint.PressureFactor != 0)
|
||
if ((stylusPoint.PressureFactor > 0.501 || stylusPoint.PressureFactor < 0.5) &&
|
||
stylusPoint.PressureFactor != 0)
|
||
return;
|
||
|
||
try
|
||
{
|
||
if (e.Stroke.StylusPoints.Count > 3)
|
||
{
|
||
var random = new Random();
|
||
var _speed = GetPointSpeed(
|
||
e.Stroke.StylusPoints[random.Next(0, e.Stroke.StylusPoints.Count - 1)].ToPoint(),
|
||
e.Stroke.StylusPoints[random.Next(0, e.Stroke.StylusPoints.Count - 1)].ToPoint(),
|
||
e.Stroke.StylusPoints[random.Next(0, e.Stroke.StylusPoints.Count - 1)].ToPoint());
|
||
|
||
RandWindow.randSeed = (int)(_speed * 100000 * 1000);
|
||
}
|
||
}
|
||
catch (Exception ex) { System.Diagnostics.Debug.WriteLine(ex); }
|
||
|
||
switch (Settings.Canvas.InkStyle)
|
||
{
|
||
case 1:
|
||
if (penType == 0)
|
||
try
|
||
{
|
||
var stylusPoints = new StylusPointCollection();
|
||
var n = e.Stroke.StylusPoints.Count - 1;
|
||
var s = "";
|
||
|
||
for (var i = 0; i <= n; i++)
|
||
{
|
||
var speed = GetPointSpeed(e.Stroke.StylusPoints[Math.Max(i - 1, 0)].ToPoint(),
|
||
e.Stroke.StylusPoints[i].ToPoint(),
|
||
e.Stroke.StylusPoints[Math.Min(i + 1, n)].ToPoint());
|
||
s += speed + "\t";
|
||
var point = new StylusPoint();
|
||
if (speed >= 0.25)
|
||
point.PressureFactor = (float)(0.5 - 0.3 * (Math.Min(speed, 1.5) - 0.3) / 1.2);
|
||
else if (speed >= 0.05)
|
||
point.PressureFactor = (float)0.5;
|
||
else
|
||
point.PressureFactor = (float)(0.5 + 0.4 * (0.05 - speed) / 0.05);
|
||
|
||
point.X = e.Stroke.StylusPoints[i].X;
|
||
point.Y = e.Stroke.StylusPoints[i].Y;
|
||
stylusPoints.Add(point);
|
||
}
|
||
|
||
e.Stroke.StylusPoints = stylusPoints;
|
||
}
|
||
catch (Exception ex) { System.Diagnostics.Debug.WriteLine(ex); }
|
||
|
||
break;
|
||
case 0:
|
||
if (penType == 0)
|
||
try
|
||
{
|
||
var stylusPoints = new StylusPointCollection();
|
||
var n = e.Stroke.StylusPoints.Count - 1;
|
||
var pressure = 0.1;
|
||
var x = 10;
|
||
if (n == 1) return;
|
||
if (n >= x)
|
||
{
|
||
for (var i = 0; i < n - x; i++)
|
||
{
|
||
var point = new StylusPoint();
|
||
|
||
point.PressureFactor = (float)0.5;
|
||
point.X = e.Stroke.StylusPoints[i].X;
|
||
point.Y = e.Stroke.StylusPoints[i].Y;
|
||
stylusPoints.Add(point);
|
||
}
|
||
|
||
for (var i = n - x; i <= n; i++)
|
||
{
|
||
var point = new StylusPoint();
|
||
|
||
point.PressureFactor = (float)((0.5 - pressure) * (n - i) / x + pressure);
|
||
point.X = e.Stroke.StylusPoints[i].X;
|
||
point.Y = e.Stroke.StylusPoints[i].Y;
|
||
stylusPoints.Add(point);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
for (var i = 0; i <= n; i++)
|
||
{
|
||
var point = new StylusPoint();
|
||
|
||
point.PressureFactor = (float)(0.4 * (n - i) / n + pressure);
|
||
point.X = e.Stroke.StylusPoints[i].X;
|
||
point.Y = e.Stroke.StylusPoints[i].Y;
|
||
stylusPoints.Add(point);
|
||
}
|
||
}
|
||
|
||
e.Stroke.StylusPoints = stylusPoints;
|
||
}
|
||
catch (Exception ex) { System.Diagnostics.Debug.WriteLine(ex); }
|
||
|
||
break;
|
||
}
|
||
}
|
||
catch (Exception ex) { System.Diagnostics.Debug.WriteLine(ex); }
|
||
|
||
// 应用高级贝塞尔曲线平滑（仅在未进行直线拉直时）
|
||
Debug.WriteLine($"墨迹平滑检查: UseAdvancedBezierSmoothing={Settings.Canvas.UseAdvancedBezierSmoothing}, wasStraightened={wasStraightened}");
|
||
Debug.WriteLine($"异步平滑设置: UseAsyncInkSmoothing={Settings.Canvas.UseAsyncInkSmoothing}, _inkSmoothingManager={_inkSmoothingManager != null}");
|
||
|
||
if (Settings.Canvas.UseAdvancedBezierSmoothing && !wasStraightened)
|
||
{
|
||
try
|
||
{
|
||
Debug.WriteLine($"开始墨迹平滑处理: 原始点数={e.Stroke.StylusPoints.Count}, 直线拉直={wasStraightened}");
|
||
|
||
// 检查原始笔画是否仍然存在于画布中
|
||
if (inkCanvas.Strokes.Contains(e.Stroke))
|
||
{
|
||
// 使用新的异步墨迹平滑管理器
|
||
if (Settings.Canvas.UseAsyncInkSmoothing && _inkSmoothingManager != null)
|
||
{
|
||
Debug.WriteLine("使用异步墨迹平滑");
|
||
// 异步处理
|
||
_ = ProcessStrokeAsync(e.Stroke);
|
||
}
|
||
else
|
||
{
|
||
// 同步处理（向后兼容）
|
||
var smoothedStroke = _inkSmoothingManager?.SmoothStroke(e.Stroke) ?? e.Stroke;
|
||
|
||
if (smoothedStroke != e.Stroke)
|
||
{
|
||
// 替换原始笔画
|
||
SetNewBackupOfStroke();
|
||
_currentCommitType = CommitReason.ShapeRecognition;
|
||
inkCanvas.Strokes.Remove(e.Stroke);
|
||
inkCanvas.Strokes.Add(smoothedStroke);
|
||
_currentCommitType = CommitReason.UserInput;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
Debug.WriteLine("原始笔画不在画布中，跳过平滑处理");
|
||
}
|
||
}
|
||
catch (Exception ex)
|
||
{
|
||
// 如果高级平滑失败，回退到原始笔画
|
||
Debug.WriteLine($"高级贝塞尔曲线平滑失败: {ex.Message}");
|
||
}
|
||
}
|
||
else if (Settings.Canvas.FitToCurve && !wasStraightened)
|
||
{
|
||
drawingAttributes.FitToCurve = true;
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// 异步处理笔画平滑
|
||
/// </summary>
|
||
/// <param name="originalStroke">原始笔画</param>
|
||
/// <returns>返回一个表示异步操作的Task</returns>
|
||
/// <remarks>
|
||
/// 异步处理笔画平滑的流程：
|
||
/// 1. 调用墨迹平滑管理器的SmoothStrokeAsync方法
|
||
/// 2. 在平滑完成后，在UI线程上执行笔画替换
|
||
/// 3. 如果原始笔画仍然存在于画布中且平滑后的笔画不同，则替换原始笔画
|
||
/// 4. 捕获并记录可能的异常
|
||
/// </remarks>
|
||
private async Task ProcessStrokeAsync(Stroke originalStroke)
|
||
{
|
||
try
|
||
{
|
||
Debug.WriteLine($"异步平滑开始: 原始点数={originalStroke.StylusPoints.Count}");
|
||
await _inkSmoothingManager.SmoothStrokeAsync(originalStroke, (original, smoothed) =>
|
||
{
|
||
Debug.WriteLine($"异步平滑完成: 原始点数={original.StylusPoints.Count}, 平滑后点数={smoothed.StylusPoints.Count}");
|
||
Debug.WriteLine($"墨迹比较: smoothed != original = {smoothed != original}");
|
||
Debug.WriteLine($"画布包含原始墨迹: {inkCanvas.Strokes.Contains(original)}");
|
||
|
||
// 在UI线程上执行笔画替换
|
||
if (inkCanvas.Strokes.Contains(original) && smoothed != original)
|
||
{
|
||
Debug.WriteLine("异步替换原始笔画为平滑后的笔画");
|
||
SetNewBackupOfStroke();
|
||
_currentCommitType = CommitReason.ShapeRecognition;
|
||
inkCanvas.Strokes.Remove(original);
|
||
inkCanvas.Strokes.Add(smoothed);
|
||
_currentCommitType = CommitReason.UserInput;
|
||
}
|
||
else
|
||
{
|
||
Debug.WriteLine($"异步平滑后的笔画与原始笔画相同，未进行替换 (contains={inkCanvas.Strokes.Contains(original)}, different={smoothed != original})");
|
||
}
|
||
});
|
||
}
|
||
catch (Exception ex)
|
||
{
|
||
Debug.WriteLine($"异步墨迹平滑失败: {ex.Message}");
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// 检查一笔墨迹是否可能是直线
|
||
/// </summary>
|
||
/// <param name="stroke">要检查的笔画</param>
|
||
/// <returns>如果可能是直线则返回true，否则返回false</returns>
|
||
/// <remarks>
|
||
/// 检查一笔墨迹是否可能是直线的流程：
|
||
/// 1. 确保有足够的点来进行线条分析（至少5个点）
|
||
/// 2. 计算线条长度，确保线条足够长（使用分辨率自适应阈值）
|
||
/// 3. 检查墨迹复杂度，避免将复杂图形拉直
|
||
/// 4. 检查是否为明显的曲线
|
||
/// 5. 根据用户设置的灵敏度值计算阈值
|
||
/// 6. 快速检查：计算几个关键点与直线的距离
|
||
/// 7. 根据偏差阈值判断是否可能是直线
|
||
/// </remarks>
|
||
private bool IsPotentialStraightLine(Stroke stroke)
|
||
{
|
||
// 确保有足够的点来进行线条分析
|
||
if (stroke.StylusPoints.Count < 5)
|
||
return false;
|
||
|
||
Point start = stroke.StylusPoints.First().ToPoint();
|
||
Point end = stroke.StylusPoints.Last().ToPoint();
|
||
double lineLength = GetDistance(start, end);
|
||
// 分辨率自适应阈值
|
||
double adaptiveThreshold = Settings.Canvas.AutoStraightenLineThreshold * GetResolutionScale();
|
||
// 线条必须足够长才考虑拉直，使用自适应阈值
|
||
if (lineLength < adaptiveThreshold)
|
||
return false;
|
||
|
||
// 新增：检查墨迹复杂度，避免将复杂图形拉直
|
||
if (IsComplexShape(stroke))
|
||
return false;
|
||
|
||
// 新增：检查是否为明显的曲线
|
||
if (IsObviousCurve(stroke))
|
||
return false;
|
||
|
||
// 获取用户设置的灵敏度值，确保使用正确的设置
|
||
double sensitivity = Settings.InkToShape.LineStraightenSensitivity;
|
||
|
||
// 输出当前灵敏度值
|
||
Debug.WriteLine($"IsPotentialStraightLine - sensitivity: {sensitivity}, length: {lineLength}");
|
||
|
||
// 将灵敏度转换为阈值：灵敏度0.05-2.0映射到阈值0.01-0.4
|
||
double quickThreshold = Math.Max(0.01, sensitivity * 0.2); // 确保最小阈值为0.01
|
||
|
||
Debug.WriteLine($"使用快速检查阈值: {quickThreshold}");
|
||
|
||
// 快速检查：计算几个关键点与直线的距离
|
||
if (stroke.StylusPoints.Count >= 10)
|
||
{
|
||
List<Point> checkPoints;
|
||
|
||
// 使用采样点进行更准确的判断
|
||
if (Settings.Canvas.HighPrecisionLineStraighten)
|
||
{
|
||
var allPoints = stroke.StylusPoints.Select(p => p.ToPoint()).ToList();
|
||
checkPoints = SamplePointsByDistance(allPoints, 10.0);
|
||
Debug.WriteLine($"高精度模式快速检查：原始点数={allPoints.Count}, 采样点数={checkPoints.Count}");
|
||
}
|
||
else
|
||
{
|
||
// 取中点和1/4、3/4位置的点
|
||
int quarterIdx = stroke.StylusPoints.Count / 4;
|
||
int midIdx = stroke.StylusPoints.Count / 2;
|
||
int threeQuarterIdx = quarterIdx * 3;
|
||
|
||
checkPoints = new List<Point>
|
||
{
|
||
stroke.StylusPoints[quarterIdx].ToPoint(),
|
||
stroke.StylusPoints[midIdx].ToPoint(),
|
||
stroke.StylusPoints[threeQuarterIdx].ToPoint()
|
||
};
|
||
}
|
||
|
||
// 计算所有检查点与直线的平均偏差
|
||
double totalDeviation = 0;
|
||
double maxDeviation = 0;
|
||
int validPointCount = 0;
|
||
|
||
foreach (Point checkPoint in checkPoints)
|
||
{
|
||
double deviation = DistanceFromLineToPoint(start, end, checkPoint);
|
||
totalDeviation += deviation;
|
||
maxDeviation = Math.Max(maxDeviation, deviation);
|
||
validPointCount++;
|
||
}
|
||
|
||
if (validPointCount > 0)
|
||
{
|
||
double avgDeviation = totalDeviation / validPointCount;
|
||
// 使用相对偏差：偏差与线长的比例，并使用灵敏度进行调整
|
||
double quickRelativeThreshold = lineLength * quickThreshold;
|
||
|
||
// 使用平均偏差和最大偏差的综合判断
|
||
double deviationThreshold = Settings.Canvas.HighPrecisionLineStraighten
|
||
? Math.Max(avgDeviation, maxDeviation * 0.7) // 高精度模式更严格
|
||
: maxDeviation;
|
||
|
||
// 记录检测到的偏差
|
||
Debug.WriteLine($"Deviations: avg={avgDeviation:F2}, max={maxDeviation:F2}, threshold={quickRelativeThreshold:F2}, highPrecision={Settings.Canvas.HighPrecisionLineStraighten}");
|
||
|
||
if (deviationThreshold > quickRelativeThreshold)
|
||
{
|
||
return false;
|
||
}
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 检查墨迹是否为复杂形状
|
||
/// </summary>
|
||
/// <param name="stroke">要检查的笔画</param>
|
||
/// <returns>如果是复杂形状则返回true，否则返回false</returns>
|
||
/// <remarks>
|
||
/// 检查墨迹是否为复杂形状的流程：
|
||
/// 1. 确保有足够的点来进行分析（至少10个点）
|
||
/// 2. 计算直线距离和实际路径长度
|
||
/// 3. 如果实际路径长度远大于直线距离（2.5倍以上），说明是复杂形状
|
||
/// 4. 检查方向变化次数，如果超过动态阈值，说明是复杂形状
|
||
/// </remarks>
|
||
private bool IsComplexShape(Stroke stroke)
|
||
{
|
||
if (stroke.StylusPoints.Count < 10) return false;
|
||
|
||
Point start = stroke.StylusPoints.First().ToPoint();
|
||
Point end = stroke.StylusPoints.Last().ToPoint();
|
||
double lineLength = GetDistance(start, end);
|
||
|
||
// 计算墨迹的实际路径长度
|
||
double actualLength = 0;
|
||
for (int i = 1; i < stroke.StylusPoints.Count; i++)
|
||
{
|
||
Point p1 = stroke.StylusPoints[i - 1].ToPoint();
|
||
Point p2 = stroke.StylusPoints[i].ToPoint();
|
||
actualLength += GetDistance(p1, p2);
|
||
}
|
||
|
||
// 如果实际路径长度远大于直线距离，说明是复杂形状
|
||
double complexityRatio = actualLength / Math.Max(lineLength, 1);
|
||
if (complexityRatio > 2.5) // 实际路径是直线距离的2.5倍以上
|
||
{
|
||
Debug.WriteLine($"检测到复杂形状：复杂度比率 = {complexityRatio:F2}");
|
||
return true;
|
||
}
|
||
|
||
// 检查方向变化次数
|
||
int directionChanges = CountDirectionChanges(stroke);
|
||
int maxAllowedChanges = Math.Max(3, stroke.StylusPoints.Count / 20); // 动态阈值
|
||
if (directionChanges > maxAllowedChanges)
|
||
{
|
||
Debug.WriteLine($"检测到复杂形状：方向变化次数 = {directionChanges}，阈值 = {maxAllowedChanges}");
|
||
return true;
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 检查是否为明显的曲线（如圆弧、抛物线等）
|
||
/// </summary>
|
||
/// <param name="stroke">要检查的笔画</param>
|
||
/// <returns>如果是明显的曲线则返回true，否则返回false</returns>
|
||
/// <remarks>
|
||
/// 检查墨迹是否为明显的曲线的流程：
|
||
/// 1. 确保有足够的点来进行分析（至少10个点）
|
||
/// 2. 计算线条长度
|
||
/// 3. 检查曲率一致性，如果一致则认为是明显的曲线
|
||
/// 4. 检查中点偏移（对圆弧特别有效）：
|
||
/// - 计算中点到直线的距离
|
||
/// - 如果中点偏移超过线长的15%，且偏移方向一致，可能是圆弧
|
||
/// </remarks>
|
||
private bool IsObviousCurve(Stroke stroke)
|
||
{
|
||
if (stroke.StylusPoints.Count < 10) return false;
|
||
|
||
Point start = stroke.StylusPoints.First().ToPoint();
|
||
Point end = stroke.StylusPoints.Last().ToPoint();
|
||
double lineLength = GetDistance(start, end);
|
||
|
||
// 检查曲率一致性
|
||
if (HasConsistentCurvature(stroke))
|
||
{
|
||
Debug.WriteLine("检测到明显曲线：曲率一致");
|
||
return true;
|
||
}
|
||
|
||
// 检查中点偏移（对圆弧特别有效）
|
||
int midIndex = stroke.StylusPoints.Count / 2;
|
||
Point midPoint = stroke.StylusPoints[midIndex].ToPoint();
|
||
double midDeviation = DistanceFromLineToPoint(start, end, midPoint);
|
||
|
||
// 如果中点偏移超过线长的15%，且偏移方向一致，可能是圆弧
|
||
if (midDeviation > lineLength * 0.15)
|
||
{
|
||
// 检查偏移方向的一致性
|
||
if (IsConsistentArcDirection(stroke))
|
||
{
|
||
Debug.WriteLine($"检测到明显曲线：中点偏移 = {midDeviation:F2}，线长 = {lineLength:F2}");
|
||
return true;
|
||
}
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 计算方向变化次数
|
||
/// </summary>
|
||
/// <param name="stroke">要检查的笔画</param>
|
||
/// <returns>返回方向变化的次数</returns>
|
||
/// <remarks>
|
||
/// 计算方向变化次数的流程：
|
||
/// 1. 确保有足够的点来进行分析（至少3个点）
|
||
/// 2. 遍历笔画中的每个点（除了第一个和最后一个）
|
||
/// 3. 计算每个点前后线段的角度变化
|
||
/// 4. 处理角度跨越问题（超过180度的情况）
|
||
/// 5. 如果角度变化超过30度，且与上一次角度变化的差异超过15度，认为是方向变化
|
||
/// 6. 返回方向变化的总次数
|
||
/// </remarks>
|
||
private int CountDirectionChanges(Stroke stroke)
|
||
{
|
||
if (stroke.StylusPoints.Count < 3) return 0;
|
||
|
||
int changes = 0;
|
||
double lastAngle = 0;
|
||
bool hasLastAngle = false;
|
||
|
||
for (int i = 1; i < stroke.StylusPoints.Count - 1; i++)
|
||
{
|
||
Point p1 = stroke.StylusPoints[i - 1].ToPoint();
|
||
Point p2 = stroke.StylusPoints[i].ToPoint();
|
||
Point p3 = stroke.StylusPoints[i + 1].ToPoint();
|
||
|
||
// 计算角度变化
|
||
double angle1 = Math.Atan2(p2.Y - p1.Y, p2.X - p1.X);
|
||
double angle2 = Math.Atan2(p3.Y - p2.Y, p3.X - p2.X);
|
||
double angleDiff = Math.Abs(angle2 - angle1);
|
||
|
||
// 处理角度跨越问题
|
||
if (angleDiff > Math.PI) angleDiff = 2 * Math.PI - angleDiff;
|
||
|
||
// 如果角度变化超过30度，认为是方向变化
|
||
if (angleDiff > Math.PI / 6) // 30度
|
||
{
|
||
if (hasLastAngle && Math.Abs(angleDiff - lastAngle) > Math.PI / 12) // 15度
|
||
{
|
||
changes++;
|
||
}
|
||
lastAngle = angleDiff;
|
||
hasLastAngle = true;
|
||
}
|
||
}
|
||
|
||
return changes;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 检查曲率是否一致（用于识别圆弧等规则曲线）
|
||
/// </summary>
|
||
/// <param name="stroke">要检查的笔画</param>
|
||
/// <returns>如果曲率一致则返回true，否则返回false</returns>
|
||
/// <remarks>
|
||
/// 检查曲率是否一致的流程：
|
||
/// 1. 确保有足够的点来进行分析（至少15个点）
|
||
/// 2. 计算每个点的曲率（使用前后各两个点）
|
||
/// 3. 过滤掉无效的曲率值（NaN或无穷大），并取绝对值
|
||
/// 4. 确保有足够的有效曲率值（至少5个）
|
||
/// 5. 计算曲率的平均值和标准差
|
||
/// 6. 如果平均曲率大于0.001且标准差与平均值的比例小于0.5，认为曲率一致
|
||
/// </remarks>
|
||
private bool HasConsistentCurvature(Stroke stroke)
|
||
{
|
||
if (stroke.StylusPoints.Count < 15) return false;
|
||
|
||
List<double> curvatures = new List<double>();
|
||
|
||
// 计算每个点的曲率
|
||
for (int i = 2; i < stroke.StylusPoints.Count - 2; i++)
|
||
{
|
||
Point p1 = stroke.StylusPoints[i - 2].ToPoint();
|
||
Point p2 = stroke.StylusPoints[i].ToPoint();
|
||
Point p3 = stroke.StylusPoints[i + 2].ToPoint();
|
||
|
||
double curvature = CalculateCurvature(p1, p2, p3);
|
||
if (!double.IsNaN(curvature) && !double.IsInfinity(curvature))
|
||
{
|
||
curvatures.Add(Math.Abs(curvature));
|
||
}
|
||
}
|
||
|
||
if (curvatures.Count < 5) return false;
|
||
|
||
// 计算曲率的标准差
|
||
double avgCurvature = curvatures.Average();
|
||
double variance = curvatures.Select(c => Math.Pow(c - avgCurvature, 2)).Average();
|
||
double stdDev = Math.Sqrt(variance);
|
||
|
||
// 如果曲率变化很小且平均曲率不为零，可能是规则曲线
|
||
return avgCurvature > 0.001 && stdDev / avgCurvature < 0.5;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 检查圆弧方向是否一致
|
||
/// </summary>
|
||
private bool IsConsistentArcDirection(Stroke stroke)
|
||
{
|
||
if (stroke.StylusPoints.Count < 10) return false;
|
||
|
||
Point start = stroke.StylusPoints.First().ToPoint();
|
||
Point end = stroke.StylusPoints.Last().ToPoint();
|
||
|
||
int positiveDeviations = 0;
|
||
int negativeDeviations = 0;
|
||
|
||
// 检查多个点相对于直线的偏移方向
|
||
for (int i = 1; i < stroke.StylusPoints.Count - 1; i += Math.Max(1, stroke.StylusPoints.Count / 10))
|
||
{
|
||
Point p = stroke.StylusPoints[i].ToPoint();
|
||
double signedDistance = SignedDistanceFromLineToPoint(start, end, p);
|
||
|
||
if (Math.Abs(signedDistance) > 5) // 忽略很小的偏移
|
||
{
|
||
if (signedDistance > 0) positiveDeviations++;
|
||
else negativeDeviations++;
|
||
}
|
||
}
|
||
|
||
// 如果大部分点都在直线的同一侧，说明是一致的弧形
|
||
int totalSignificantDeviations = positiveDeviations + negativeDeviations;
|
||
if (totalSignificantDeviations < 3) return false;
|
||
|
||
double consistency = Math.Max(positiveDeviations, negativeDeviations) / (double)totalSignificantDeviations;
|
||
return consistency > 0.8; // 80%的点在同一侧
|
||
}
|
||
|
||
/// <summary>
|
||
/// 计算三点的曲率
|
||
/// </summary>
|
||
private double CalculateCurvature(Point p1, Point p2, Point p3)
|
||
{
|
||
// 使用三点计算曲率的公式
|
||
double a = GetDistance(p1, p2);
|
||
double b = GetDistance(p2, p3);
|
||
double c = GetDistance(p1, p3);
|
||
|
||
if (a == 0 || b == 0 || c == 0) return 0;
|
||
|
||
// 使用海伦公式计算面积
|
||
double s = (a + b + c) / 2;
|
||
double areaSquared = s * (s - a) * (s - b) * (s - c);
|
||
double area = areaSquared > 0 ? Math.Sqrt(areaSquared) : 0;
|
||
|
||
// 曲率 = 4 * 面积 / (a * b * c)
|
||
return 4 * area / (a * b * c);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 计算点到直线的有符号距离
|
||
/// </summary>
|
||
private double SignedDistanceFromLineToPoint(Point lineStart, Point lineEnd, Point point)
|
||
{
|
||
// 使用叉积计算有符号距离
|
||
double dx = lineEnd.X - lineStart.X;
|
||
double dy = lineEnd.Y - lineStart.Y;
|
||
double lineLength = Math.Sqrt(dx * dx + dy * dy);
|
||
|
||
if (lineLength == 0) return 0;
|
||
|
||
return ((lineEnd.Y - lineStart.Y) * point.X - (lineEnd.X - lineStart.X) * point.Y +
|
||
lineEnd.X * lineStart.Y - lineEnd.Y * lineStart.X) / lineLength;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 尝试获取直线的端点
|
||
/// </summary>
|
||
/// <param name="stroke">要分析的笔画</param>
|
||
/// <param name="endpoint1">输出参数：直线的第一个端点</param>
|
||
/// <param name="endpoint2">输出参数：直线的第二个端点</param>
|
||
/// <returns>如果成功获取直线端点则返回true，否则返回false</returns>
|
||
/// <remarks>
|
||
/// 尝试获取直线端点的流程：
|
||
/// 1. 确保笔画有足够的点（至少10个点）
|
||
/// 2. 如果启用高精度直线拉直，则对点数进行采样
|
||
/// 3. 使用总最小二乘法(TLS/PCA)进行直线拟合
|
||
/// 4. 计算中心点和协方差矩阵
|
||
/// 5. 计算特征值和特征向量，确定直线方向
|
||
/// 6. 计算解释方差比例（拟合优度）
|
||
/// 7. 计算所有点在直线方向上的投影，找到最小和最大投影值
|
||
/// 8. 根据投影值计算端点坐标
|
||
/// 9. 根据解释方差比例判断是否为直线
|
||
/// </remarks>
|
||
private bool TryGetStraightLineEndpoints(Stroke stroke, out Point endpoint1, out Point endpoint2)
|
||
{
|
||
endpoint1 = new Point();
|
||
endpoint2 = new Point();
|
||
|
||
var points = stroke.StylusPoints.Select(p => p.ToPoint()).ToList();
|
||
if (points.Count < 10)
|
||
{
|
||
return false;
|
||
}
|
||
|
||
List<Point> workingPoints = points;
|
||
if (Settings.Canvas.HighPrecisionLineStraighten)
|
||
{
|
||
workingPoints = SamplePointsByDistance(points, 10.0);
|
||
Debug.WriteLine($"高精度模式：原始点数={points.Count}, 采样后点数={workingPoints.Count}");
|
||
}
|
||
|
||
// 使用总最小二乘法(TLS/PCA)进行直线拟合
|
||
int n = workingPoints.Count - 8;
|
||
if (n < 1)
|
||
{
|
||
// 如果采样后点数太少，回退到原始方法
|
||
n = points.Count - 8;
|
||
workingPoints = points;
|
||
}
|
||
|
||
List<Point> filteredPoints = new List<Point>();
|
||
|
||
// 收集过滤后的点（跳过前 4 个和后 4 个点，用于计算直线方向）
|
||
int skipCount = Math.Min(4, n / 2); // 确保跳过数量不超过一半
|
||
for (int i = skipCount; i < n + skipCount && i < workingPoints.Count; i++)
|
||
{
|
||
filteredPoints.Add(workingPoints[i]);
|
||
}
|
||
|
||
// 计算中心点（使用过滤后的点）
|
||
double centerX = 0, centerY = 0;
|
||
foreach (Point p in filteredPoints)
|
||
{
|
||
centerX += p.X;
|
||
centerY += p.Y;
|
||
}
|
||
centerX /= filteredPoints.Count;
|
||
centerY /= filteredPoints.Count;
|
||
|
||
// 计算协方差矩阵（使用过滤后的点）
|
||
double covXX = 0, covYY = 0, covXY = 0;
|
||
foreach (Point p in filteredPoints)
|
||
{
|
||
double dx = p.X - centerX;
|
||
double dy = p.Y - centerY;
|
||
covXX += dx * dx;
|
||
covYY += dy * dy;
|
||
covXY += dx * dy;
|
||
}
|
||
|
||
// 计算特征值和特征向量
|
||
double trace = covXX + covYY;
|
||
double determinant = covXX * covYY - covXY * covXY;
|
||
double discriminantSquared = trace * trace - 4 * determinant;
|
||
double discriminant = discriminantSquared > 0 ? Math.Sqrt(discriminantSquared) : 0;
|
||
|
||
double eigenvalue1 = (trace + discriminant) / 2;
|
||
double eigenvalue2 = (trace - discriminant) / 2;
|
||
|
||
// 最大特征值对应的特征向量即为直线方向
|
||
double directionX, directionY;
|
||
if (Math.Abs(covXY) > 1e-10)
|
||
{
|
||
directionX = covXY;
|
||
directionY = eigenvalue1 - covXX;
|
||
// 归一化
|
||
double length = Math.Sqrt(directionX * directionX + directionY * directionY);
|
||
if (length > 1e-10)
|
||
{
|
||
directionX /= length;
|
||
directionY /= length;
|
||
}
|
||
else
|
||
{
|
||
// 如果归一化失败，使用起点和终点计算方向
|
||
Point start = points.First();
|
||
Point end = points.Last();
|
||
double dx = end.X - start.X;
|
||
double dy = end.Y - start.Y;
|
||
double lineLength = Math.Sqrt(dx * dx + dy * dy);
|
||
if (lineLength > 1e-10)
|
||
{
|
||
directionX = dx / lineLength;
|
||
directionY = dy / lineLength;
|
||
}
|
||
else
|
||
{
|
||
directionX = (covXX >= covYY) ? 1 : 0;
|
||
directionY = (covXX >= covYY) ? 0 : 1;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
Point start = points.First();
|
||
Point end = points.Last();
|
||
double dx = end.X - start.X;
|
||
double dy = end.Y - start.Y;
|
||
double lineLength = Math.Sqrt(dx * dx + dy * dy);
|
||
|
||
if (lineLength > 1e-10)
|
||
{
|
||
directionX = dx / lineLength;
|
||
directionY = dy / lineLength;
|
||
}
|
||
else
|
||
{
|
||
if (Math.Abs(eigenvalue1 - covXX) < Math.Abs(eigenvalue1 - covYY))
|
||
{
|
||
// 主要方向是 X 轴方向
|
||
directionX = 1;
|
||
directionY = 0;
|
||
}
|
||
else
|
||
{
|
||
// 主要方向是 Y 轴方向
|
||
directionX = 0;
|
||
directionY = 1;
|
||
}
|
||
}
|
||
}
|
||
|
||
// 计算解释方差比例（拟合优度）
|
||
double totalVariance = eigenvalue1 + eigenvalue2;
|
||
double explainedVarianceRatio = (totalVariance > 1e-10) ?
|
||
Math.Max(eigenvalue1, eigenvalue2) / totalVariance : 1d;
|
||
|
||
// 使用所有点计算端点
|
||
double minProjection = double.MaxValue;
|
||
double maxProjection = double.MinValue;
|
||
|
||
// 计算所有点在直线方向上的投影
|
||
List<Point> pointsForProjection = Settings.Canvas.HighPrecisionLineStraighten ? workingPoints : points;
|
||
foreach (Point p in pointsForProjection)
|
||
{
|
||
// 相对于过滤点中心的投影
|
||
double projection = (p.X - centerX) * directionX + (p.Y - centerY) * directionY;
|
||
minProjection = Math.Min(minProjection, projection);
|
||
maxProjection = Math.Max(maxProjection, projection);
|
||
}
|
||
|
||
// 计算端点坐标
|
||
endpoint1 = new Point(
|
||
centerX + minProjection * directionX,
|
||
centerY + minProjection * directionY
|
||
);
|
||
|
||
endpoint2 = new Point(
|
||
centerX + maxProjection * directionX,
|
||
centerY + maxProjection * directionY
|
||
);
|
||
|
||
// 使用解释方差比例作为判断条件
|
||
double threshold = 0.998 + Settings.InkToShape.LineNormalizationThreshold / 500;
|
||
return explainedVarianceRatio > threshold;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 确定笔画是否应该被拉成直线
|
||
/// </summary>
|
||
/// <param name="stroke">要分析的笔画</param>
|
||
/// <returns>如果笔画应该被拉成直线则返回true，否则返回false</returns>
|
||
/// <remarks>
|
||
/// 确定笔画是否应该被拉成直线的流程：
|
||
/// 1. 计算线条长度和分辨率自适应阈值
|
||
/// 2. 如果线条太短，不进行拉直处理
|
||
/// 3. 检查线条复杂度，如果是复杂形状，不进行拉直处理
|
||
/// 4. 尝试获取直线端点，判断是否满足直线条件
|
||
/// 5. 根据判断结果返回相应的布尔值
|
||
/// </remarks>
|
||
private bool ShouldStraightenLine(Stroke stroke)
|
||
{
|
||
// 分辨率自适应阈值
|
||
Point start = stroke.StylusPoints.First().ToPoint();
|
||
Point end = stroke.StylusPoints.Last().ToPoint();
|
||
double lineLength = GetDistance(start, end);
|
||
double adaptiveThreshold = Settings.Canvas.AutoStraightenLineThreshold * GetResolutionScale();
|
||
|
||
// 如果线条太短，不进行拉直处理
|
||
if (lineLength < adaptiveThreshold)
|
||
{
|
||
Debug.WriteLine($"线条太短: {lineLength} < {adaptiveThreshold}");
|
||
return false;
|
||
}
|
||
|
||
// 检查复杂度
|
||
if (IsComplexShape(stroke))
|
||
{
|
||
Debug.WriteLine("拒绝拉直：检测到复杂形状");
|
||
return false;
|
||
}
|
||
|
||
Point endpoint1, endpoint2;
|
||
bool shouldStraighten = TryGetStraightLineEndpoints(stroke, out endpoint1, out endpoint2);
|
||
|
||
if (shouldStraighten)
|
||
{
|
||
Debug.WriteLine($"接受拉直：判断为直线，解释方差比例满足阈值");
|
||
}
|
||
else
|
||
{
|
||
Debug.WriteLine($"拒绝拉直：判断不满足直线条件");
|
||
}
|
||
|
||
return shouldStraighten;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 计算墨迹的直线度评分（0-1，1表示完美直线）
|
||
/// </summary>
|
||
/// <param name="stroke">要分析的笔画</param>
|
||
/// <returns>返回直线度评分，范围为0到1，1表示完美直线</returns>
|
||
/// <remarks>
|
||
/// 计算墨迹直线度评分的流程：
|
||
/// 1. 确保笔画有足够的点（至少3个点）
|
||
/// 2. 计算线条长度
|
||
/// 3. 计算偏差评分（基于点到直线的距离）：
|
||
/// - 计算所有点到直线的平均偏差和最大偏差
|
||
/// - 根据偏差计算评分
|
||
/// 4. 计算方向一致性评分：
|
||
/// - 计算每个线段与目标方向的角度差
|
||
/// - 将角度差转换为评分
|
||
/// 5. 计算路径效率评分：
|
||
/// - 计算实际路径长度与直线距离的比例
|
||
/// 6. 计算端点连接度评分（默认满分）
|
||
/// 7. 综合评分（加权平均）：
|
||
/// - 偏差评分：40%
|
||
/// - 方向一致性评分：30%
|
||
/// - 路径效率评分：20%
|
||
/// - 端点连接度评分：10%
|
||
/// 8. 返回最终评分，确保在0到1之间
|
||
/// </remarks>
|
||
private double CalculateStraightnessScore(Stroke stroke)
|
||
{
|
||
if (stroke.StylusPoints.Count < 3) return 0;
|
||
|
||
Point start = stroke.StylusPoints.First().ToPoint();
|
||
Point end = stroke.StylusPoints.Last().ToPoint();
|
||
double lineLength = GetDistance(start, end);
|
||
|
||
if (lineLength == 0) return 0;
|
||
|
||
// 1. 计算偏差评分（基于点到直线的距离）
|
||
double totalDeviation = 0;
|
||
double maxDeviation = 0;
|
||
int pointCount = 0;
|
||
|
||
foreach (StylusPoint sp in stroke.StylusPoints)
|
||
{
|
||
Point p = sp.ToPoint();
|
||
double deviation = DistanceFromLineToPoint(start, end, p);
|
||
totalDeviation += deviation;
|
||
maxDeviation = Math.Max(maxDeviation, deviation);
|
||
pointCount++;
|
||
}
|
||
|
||
double avgDeviation = totalDeviation / pointCount;
|
||
|
||
// 偏差评分：基于平均偏差和最大偏差
|
||
double deviationScore = Math.Max(0, 1 - (avgDeviation / (lineLength * 0.05)) - (maxDeviation / (lineLength * 0.1)));
|
||
|
||
// 2. 计算方向一致性评分
|
||
double directionScore = CalculateDirectionConsistency(stroke);
|
||
|
||
// 3. 计算路径效率评分（实际路径长度 vs 直线距离）
|
||
double actualLength = 0;
|
||
for (int i = 1; i < stroke.StylusPoints.Count; i++)
|
||
{
|
||
Point p1 = stroke.StylusPoints[i - 1].ToPoint();
|
||
Point p2 = stroke.StylusPoints[i].ToPoint();
|
||
actualLength += GetDistance(p1, p2);
|
||
}
|
||
double efficiencyScore = Math.Max(0, Math.Min(1, lineLength / actualLength));
|
||
|
||
// 4. 计算端点连接度评分（起点到终点的直接性）
|
||
double endpointScore = 1.0; // 默认满分，因为我们已经有了起点和终点
|
||
|
||
// 综合评分（加权平均）
|
||
double finalScore = (deviationScore * 0.4 + directionScore * 0.3 + efficiencyScore * 0.2 + endpointScore * 0.1);
|
||
|
||
Debug.WriteLine($"直线度评分详情: 偏差={deviationScore:F3}, 方向={directionScore:F3}, 效率={efficiencyScore:F3}, 综合={finalScore:F3}");
|
||
|
||
return Math.Max(0, Math.Min(1, finalScore));
|
||
}
|
||
|
||
/// <summary>
|
||
/// 计算方向一致性评分
|
||
/// </summary>
|
||
/// <param name="stroke">要分析的笔画</param>
|
||
/// <returns>返回方向一致性评分，范围为0到1，1表示方向完全一致</returns>
|
||
/// <remarks>
|
||
/// 计算方向一致性评分的流程：
|
||
/// 1. 确保笔画有足够的点（至少5个点）
|
||
/// 2. 计算目标方向（从起点到终点的方向）
|
||
/// 3. 计算每个线段与目标方向的角度差：
|
||
/// - 遍历笔画中的每个线段
|
||
/// - 忽略太短的线段（长度小于2）
|
||
/// - 计算线段的角度
|
||
/// - 计算与目标方向的角度差
|
||
/// - 处理角度跨越问题（超过180度的情况）
|
||
/// 4. 计算平均角度差
|
||
/// 5. 将角度差转换为评分（0-1）：
|
||
/// - 0度差 = 1分
|
||
/// - 90度差 = 0分
|
||
/// 6. 返回方向一致性评分
|
||
/// </remarks>
|
||
private double CalculateDirectionConsistency(Stroke stroke)
|
||
{
|
||
if (stroke.StylusPoints.Count < 5) return 1.0;
|
||
|
||
Point start = stroke.StylusPoints.First().ToPoint();
|
||
Point end = stroke.StylusPoints.Last().ToPoint();
|
||
|
||
// 目标方向
|
||
double targetAngle = Math.Atan2(end.Y - start.Y, end.X - start.X);
|
||
|
||
double totalAngleDifference = 0;
|
||
int segmentCount = 0;
|
||
|
||
// 计算每个线段与目标方向的角度差
|
||
for (int i = 1; i < stroke.StylusPoints.Count; i++)
|
||
{
|
||
Point p1 = stroke.StylusPoints[i - 1].ToPoint();
|
||
Point p2 = stroke.StylusPoints[i].ToPoint();
|
||
|
||
double segmentLength = GetDistance(p1, p2);
|
||
if (segmentLength < 2) continue; // 忽略太短的线段
|
||
|
||
double segmentAngle = Math.Atan2(p2.Y - p1.Y, p2.X - p1.X);
|
||
double angleDiff = Math.Abs(segmentAngle - targetAngle);
|
||
|
||
// 处理角度跨越问题
|
||
if (angleDiff > Math.PI) angleDiff = 2 * Math.PI - angleDiff;
|
||
|
||
totalAngleDifference += angleDiff;
|
||
segmentCount++;
|
||
}
|
||
|
||
if (segmentCount == 0) return 1.0;
|
||
|
||
double avgAngleDifference = totalAngleDifference / segmentCount;
|
||
|
||
// 将角度差转换为评分（0-1）
|
||
// 0度差 = 1分，90度差 = 0分
|
||
double directionScore = Math.Max(0, 1 - (avgAngleDifference / (Math.PI / 2)));
|
||
|
||
return directionScore;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 在两点之间创建直线笔画
|
||
/// </summary>
|
||
/// <param name="start">直线的起始点</param>
|
||
/// <param name="end">直线的结束点</param>
|
||
/// <returns>返回包含直线点集的StylusPointCollection</returns>
|
||
/// <remarks>
|
||
/// 在两点之间创建直线笔画的流程：
|
||
/// 1. 根据是否启用压感触屏模式决定如何设置压感：
|
||
/// - 如果未启用压感触屏模式、禁用压感、启用无压感矩形或使用钢笔类型1，则使用均匀粗细（压感值0.5）
|
||
/// - 否则，创建带有压感变化的直线：
|
||
/// - 计算中点
|
||
/// - 从起点到中点：压感从0.4渐变到0.8
|
||
/// - 从中点到终点：压感从0.8渐变到0.4
|
||
/// 2. 使用GeneratePointsBetween方法生成点集
|
||
/// 3. 返回生成的点集
|
||
/// </remarks>
|
||
private StylusPointCollection CreateStraightLine(Point start, Point end)
|
||
{
|
||
StylusPointCollection points = new StylusPointCollection();
|
||
|
||
// 根据是否启用压感触屏模式决定如何设置压感
|
||
// 如果未启用压感触屏模式，则使用均匀粗细
|
||
if (!Settings.Canvas.EnablePressureTouchMode || Settings.Canvas.DisablePressure ||
|
||
Settings.InkToShape.IsInkToShapeNoFakePressureRectangle || penType == 1)
|
||
{
|
||
var linePoints = GeneratePointsBetween(start, end, 0.5f, 0.5f, 8.0);
|
||
foreach (var pt in linePoints)
|
||
{
|
||
points.Add(pt);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
Point midPoint = new Point((start.X + end.X) / 2, (start.Y + end.Y) / 2);
|
||
|
||
var startToMid = GeneratePointsBetween(start, midPoint, 0.4f, 0.8f, 8.0);
|
||
foreach (var pt in startToMid)
|
||
{
|
||
points.Add(pt);
|
||
}
|
||
|
||
var midToEnd = GeneratePointsBetween(midPoint, end, 0.8f, 0.4f, 8.0);
|
||
for (int i = 1; i < midToEnd.Count; i++)
|
||
{
|
||
points.Add(midToEnd[i]);
|
||
}
|
||
}
|
||
|
||
return points;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 根据距离对点数进行采样
|
||
/// </summary>
|
||
/// <param name="points">原始点列表</param>
|
||
/// <param name="sampleInterval">采样间隔，默认为10.0</param>
|
||
/// <returns>返回采样后的点列表</returns>
|
||
/// <remarks>
|
||
/// 根据距离对点数进行采样的流程：
|
||
/// 1. 确保原始点列表不为空且至少有2个点
|
||
/// 2. 总是包含起点
|
||
/// 3. 遍历原始点列表，计算累积距离：
|
||
/// - 当累积距离达到采样间隔时，添加当前点
|
||
/// - 重置累积距离
|
||
/// 4. 总是包含终点（如果还没有包含）
|
||
/// 5. 返回采样后的点列表
|
||
/// </remarks>
|
||
private List<Point> SamplePointsByDistance(List<Point> points, double sampleInterval = 10.0)
|
||
{
|
||
if (points == null || points.Count < 2)
|
||
return points;
|
||
|
||
List<Point> sampledPoints = new List<Point>();
|
||
sampledPoints.Add(points[0]); // 总是包含起点
|
||
|
||
double accumulatedDistance = 0;
|
||
Point lastSampledPoint = points[0];
|
||
|
||
for (int i = 1; i < points.Count; i++)
|
||
{
|
||
double segmentDistance = GetDistance(lastSampledPoint, points[i]);
|
||
accumulatedDistance += segmentDistance;
|
||
|
||
// 当累积距离达到采样间隔时，添加当前点
|
||
if (accumulatedDistance >= sampleInterval)
|
||
{
|
||
sampledPoints.Add(points[i]);
|
||
lastSampledPoint = points[i];
|
||
accumulatedDistance = 0; // 重置累积距离
|
||
}
|
||
}
|
||
|
||
// 总是包含终点（如果还没有包含）
|
||
if (sampledPoints.Count == 0 || GetDistance(sampledPoints.Last(), points.Last()) > 1.0)
|
||
{
|
||
sampledPoints.Add(points.Last());
|
||
}
|
||
|
||
return sampledPoints;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 计算点到直线的距离
|
||
/// </summary>
|
||
/// <param name="lineStart">直线的起始点</param>
|
||
/// <param name="lineEnd">直线的结束点</param>
|
||
/// <param name="point">要计算距离的点</param>
|
||
/// <returns>返回点到直线的距离</returns>
|
||
/// <remarks>
|
||
/// 计算点到直线距离的流程：
|
||
/// 1. 计算直线的长度
|
||
/// 2. 如果直线长度为0（即两个点重合），则返回点到该点的距离
|
||
/// 3. 否则，使用叉积计算点到直线的垂直距离
|
||
/// 4. 返回计算得到的距离
|
||
/// </remarks>
|
||
private double DistanceFromLineToPoint(Point lineStart, Point lineEnd, Point point)
|
||
{
|
||
// Calculate distance from point to line defined by lineStart and lineEnd
|
||
double lineLength = GetDistance(lineStart, lineEnd);
|
||
if (lineLength == 0) return GetDistance(point, lineStart);
|
||
|
||
// Calculate the cross product to get the perpendicular distance
|
||
double distance = Math.Abs((lineEnd.Y - lineStart.Y) * point.X -
|
||
(lineEnd.X - lineStart.X) * point.Y +
|
||
lineEnd.X * lineStart.Y - lineEnd.Y * lineStart.X) / lineLength;
|
||
return distance;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 判断一个 stroke 是否是直线（排除虚线和点线）
|
||
/// </summary>
|
||
/// <param name="stroke">要检查的 stroke</param>
|
||
/// <returns>如果是直线返回 true，否则返回 false</returns>
|
||
/// <remarks>
|
||
/// 判断一个 stroke 是否是直线的流程：
|
||
/// 1. 检查 stroke 是否为空或没有点，如果是则返回 false
|
||
/// 2. 检查点的数量：
|
||
/// - 如果只有1个点，返回 false
|
||
/// - 如果有2个点：
|
||
/// - 计算两点之间的距离
|
||
/// - 如果距离小于10，返回 false
|
||
/// - 否则返回 true
|
||
/// - 如果有3个点：
|
||
/// - 计算第一个点和第三个点之间的距离
|
||
/// - 如果距离小于10，返回 false
|
||
/// - 计算第二个点到由第一个点和第三个点组成的直线的距离
|
||
/// - 如果距离相对于线段长度很小（小于1%），认为是直线，返回 true
|
||
/// - 否则返回 false
|
||
/// - 如果点的数量大于3，返回 false
|
||
/// </remarks>
|
||
private bool IsStraightLine(Stroke stroke)
|
||
{
|
||
if (stroke == null || stroke.StylusPoints.Count == 0)
|
||
return false;
|
||
|
||
int pointCount = stroke.StylusPoints.Count;
|
||
|
||
if (pointCount == 1)
|
||
return false;
|
||
|
||
// 最简单的直线：只有2个点
|
||
if (pointCount == 2)
|
||
{
|
||
Point p1 = stroke.StylusPoints[0].ToPoint();
|
||
Point p2 = stroke.StylusPoints[1].ToPoint();
|
||
double lineLength = GetDistance(p1, p2);
|
||
|
||
if (lineLength < 10)
|
||
return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
if (pointCount > 3)
|
||
return false;
|
||
|
||
// 对于3个点的情况，检查它们是否基本在一条直线上
|
||
if (pointCount == 3)
|
||
{
|
||
Point p1 = stroke.StylusPoints[0].ToPoint();
|
||
Point p2 = stroke.StylusPoints[1].ToPoint();
|
||
Point p3 = stroke.StylusPoints[2].ToPoint();
|
||
|
||
double totalLength = GetDistance(p1, p3);
|
||
if (totalLength < 10)
|
||
return false;
|
||
|
||
// 计算点到直线的距离
|
||
// 使用 p1 和 p3 作为直线端点，检查 p2 是否在这条直线上
|
||
double distance = DistanceFromLineToPoint(p1, p3, p2);
|
||
|
||
// 如果点到直线的距离相对于线段长度很小，认为是直线
|
||
// 使用相对误差阈值（比如 1%）
|
||
if (totalLength > 0 && distance / totalLength < 0.01)
|
||
return true;
|
||
|
||
return false;
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
private bool IsValidStraightLineSnapTarget(Stroke stroke)
|
||
{
|
||
if (stroke == null || stroke.StylusPoints.Count == 0)
|
||
return false;
|
||
if (stroke.StylusPoints.Count == 1)
|
||
return false;
|
||
if (stroke.StylusPoints.Count <= 3)
|
||
{
|
||
if (!IsStraightLine(stroke))
|
||
return false;
|
||
double len = GetDistance(stroke.StylusPoints.First().ToPoint(), stroke.StylusPoints.Last().ToPoint());
|
||
if (len < 20)
|
||
return false;
|
||
return true;
|
||
}
|
||
return IsPotentialStraightLine(stroke);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 尝试将直线端点吸附到现有笔画的端点
|
||
/// </summary>
|
||
/// <param name="start">直线的起始点</param>
|
||
/// <param name="end">直线的结束点</param>
|
||
/// <returns>返回吸附后的端点数组，如果没有发生吸附则返回null</returns>
|
||
/// <remarks>
|
||
/// 尝试将直线端点吸附到现有笔画端点的流程：
|
||
/// 1. 检查是否启用了线段端点吸附功能，如果没有启用则返回null
|
||
/// 2. 初始化吸附状态和吸附后的点
|
||
/// 3. 获取设置中的吸附距离阈值
|
||
/// 4. 遍历画布中的所有笔画：
|
||
/// - 跳过没有点的笔画
|
||
/// - 只对直线进行端点吸附，跳过虚线和点线
|
||
/// - 获取笔画的起点和终点
|
||
/// - 检查起点是否应该吸附到现有笔画的端点
|
||
/// - 检查终点是否应该吸附到现有笔画的端点
|
||
/// - 如果两个端点都已经吸附，结束遍历
|
||
/// 5. 如果发生了吸附，返回吸附后的端点数组，否则返回null
|
||
/// </remarks>
|
||
private Point[] GetSnappedEndpoints(Point start, Point end)
|
||
{
|
||
if (!Settings.Canvas.LineEndpointSnapping)
|
||
return null;
|
||
|
||
bool startSnapped = false;
|
||
bool endSnapped = false;
|
||
Point snappedStart = start;
|
||
Point snappedEnd = end;
|
||
|
||
// 使用设置中的吸附距离阈值
|
||
double snapThreshold = Settings.Canvas.LineEndpointSnappingThreshold;
|
||
|
||
// Check all strokes in canvas for potential snap points
|
||
foreach (Stroke stroke in inkCanvas.Strokes)
|
||
{
|
||
if (stroke.StylusPoints.Count == 0) continue;
|
||
|
||
// 只对直线进行端点吸附，跳过虚线和点线
|
||
if (!IsValidStraightLineSnapTarget(stroke))
|
||
continue;
|
||
|
||
// Get stroke endpoints
|
||
Point strokeStart = stroke.StylusPoints.First().ToPoint();
|
||
Point strokeEnd = stroke.StylusPoints.Last().ToPoint();
|
||
|
||
// Check if start point should snap to an endpoint
|
||
if (!startSnapped)
|
||
{
|
||
if (GetDistance(start, strokeStart) < snapThreshold)
|
||
{
|
||
snappedStart = strokeStart;
|
||
startSnapped = true;
|
||
}
|
||
else if (GetDistance(start, strokeEnd) < snapThreshold)
|
||
{
|
||
snappedStart = strokeEnd;
|
||
startSnapped = true;
|
||
}
|
||
}
|
||
|
||
// Check if end point should snap to an endpoint
|
||
if (!endSnapped)
|
||
{
|
||
if (GetDistance(end, strokeStart) < snapThreshold)
|
||
{
|
||
snappedEnd = strokeStart;
|
||
endSnapped = true;
|
||
}
|
||
else if (GetDistance(end, strokeEnd) < snapThreshold)
|
||
{
|
||
snappedEnd = strokeEnd;
|
||
endSnapped = true;
|
||
}
|
||
}
|
||
|
||
// If both endpoints are snapped, we're done
|
||
if (startSnapped && endSnapped) break;
|
||
}
|
||
|
||
// Return snapped points if any snapping occurred
|
||
if (startSnapped || endSnapped)
|
||
{
|
||
return new[] { snappedStart, snappedEnd };
|
||
}
|
||
|
||
return null;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 设置新的笔画备份
|
||
/// </summary>
|
||
/// <remarks>
|
||
/// 设置新的笔画备份的流程：
|
||
/// 1. 克隆当前墨水画布的笔画集合
|
||
/// 2. 获取当前白板索引
|
||
/// 3. 如果当前模式为0，则将白板索引设置为0
|
||
/// 4. 将克隆的笔画集合存储到strokeCollections中对应索引的位置
|
||
/// </remarks>
|
||
private void SetNewBackupOfStroke()
|
||
{
|
||
lastTouchDownStrokeCollection = inkCanvas.Strokes.Clone();
|
||
var whiteboardIndex = CurrentWhiteboardIndex;
|
||
if (currentMode == 0) whiteboardIndex = 0;
|
||
|
||
strokeCollections[whiteboardIndex] = lastTouchDownStrokeCollection;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 计算两点之间的距离
|
||
/// </summary>
|
||
/// <param name="point1">第一个点</param>
|
||
/// <param name="point2">第二个点</param>
|
||
/// <returns>返回两点之间的距离</returns>
|
||
/// <remarks>
|
||
/// 使用欧几里得距离公式计算两点之间的距离：
|
||
/// distance = √[(x2 - x1)² + (y2 - y1)²]
|
||
/// </remarks>
|
||
public double GetDistance(Point point1, Point point2)
|
||
{
|
||
return Math.Sqrt((point1.X - point2.X) * (point1.X - point2.X) +
|
||
(point1.Y - point2.Y) * (point1.Y - point2.Y));
|
||
}
|
||
|
||
/// <summary>
|
||
/// 计算点的速度
|
||
/// </summary>
|
||
/// <param name="point1">第一个点</param>
|
||
/// <param name="point2">第二个点（当前点）</param>
|
||
/// <param name="point3">第三个点</param>
|
||
/// <returns>返回点的速度</returns>
|
||
/// <remarks>
|
||
/// 计算点速度的流程：
|
||
/// 1. 计算第一个点到第二个点的距离
|
||
/// 2. 计算第三个点到第二个点的距离
|
||
/// 3. 将两个距离相加
|
||
/// 4. 除以20，得到速度值
|
||
/// </remarks>
|
||
public double GetPointSpeed(Point point1, Point point2, Point point3)
|
||
{
|
||
return (Math.Sqrt((point1.X - point2.X) * (point1.X - point2.X) +
|
||
(point1.Y - point2.Y) * (point1.Y - point2.Y))
|
||
+ Math.Sqrt((point3.X - point2.X) * (point3.X - point2.X) +
|
||
(point3.Y - point2.Y) * (point3.Y - point2.Y)))
|
||
/ 20;
|
||
}
|
||
|
||
public Point[] FixPointsDirection(Point p1, Point p2)
|
||
{
|
||
double deltaY = Math.Abs(p1.Y - p2.Y);
|
||
double deltaX = Math.Abs(p1.X - p2.X);
|
||
|
||
if (deltaY < 1e-10 || deltaX / deltaY > 8)
|
||
{
|
||
//水平
|
||
var x = deltaY / 2;
|
||
if (p1.Y > p2.Y)
|
||
{
|
||
p1.Y -= x;
|
||
p2.Y += x;
|
||
}
|
||
else
|
||
{
|
||
p1.Y += x;
|
||
p2.Y -= x;
|
||
}
|
||
}
|
||
else if (deltaX < 1e-10 || deltaY / deltaX > 8)
|
||
{
|
||
//垂直
|
||
var x = deltaX / 2;
|
||
if (p1.X > p2.X)
|
||
{
|
||
p1.X -= x;
|
||
p2.X += x;
|
||
}
|
||
else
|
||
{
|
||
p1.X += x;
|
||
p2.X -= x;
|
||
}
|
||
}
|
||
|
||
return new Point[2] { p1, p2 };
|
||
}
|
||
|
||
public StylusPointCollection GenerateFakePressureTriangle(StylusPointCollection points)
|
||
{
|
||
var newPoint = new StylusPointCollection();
|
||
|
||
if (Settings.InkToShape.IsInkToShapeNoFakePressureTriangle || penType == 1)
|
||
{
|
||
if (points.Count >= 3)
|
||
{
|
||
for (int i = 0; i < 3; i++)
|
||
{
|
||
Point start = points[i].ToPoint();
|
||
Point end = points[(i + 1) % 3].ToPoint();
|
||
var edgePoints = GeneratePointsBetween(start, end, 0.5f, 0.5f, 8.0);
|
||
if (i == 0)
|
||
{
|
||
foreach (var pt in edgePoints)
|
||
{
|
||
newPoint.Add(pt);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
for (int j = 1; j < edgePoints.Count; j++)
|
||
{
|
||
newPoint.Add(edgePoints[j]);
|
||
}
|
||
}
|
||
}
|
||
Point lastPoint = points[0].ToPoint();
|
||
Point firstPoint = newPoint[0].ToPoint();
|
||
if (GetDistance(lastPoint, firstPoint) > 1.0)
|
||
{
|
||
newPoint.Add(new StylusPoint(lastPoint.X, lastPoint.Y, 0.5f));
|
||
}
|
||
}
|
||
else
|
||
{
|
||
return points;
|
||
}
|
||
return newPoint;
|
||
}
|
||
else
|
||
{
|
||
if (points.Count >= 3)
|
||
{
|
||
for (int i = 0; i < 3; i++)
|
||
{
|
||
Point start = points[i].ToPoint();
|
||
Point end = points[(i + 1) % 3].ToPoint();
|
||
|
||
Point midPoint = GetCenterPoint(start, end);
|
||
|
||
var startToMid = GeneratePointsBetween(start, midPoint, 0.4f, 0.8f, 8.0);
|
||
if (i == 0)
|
||
{
|
||
foreach (var pt in startToMid)
|
||
{
|
||
newPoint.Add(pt);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
for (int j = 1; j < startToMid.Count; j++)
|
||
{
|
||
newPoint.Add(startToMid[j]);
|
||
}
|
||
}
|
||
|
||
var midToEnd = GeneratePointsBetween(midPoint, end, 0.8f, 0.4f, 8.0);
|
||
for (int j = 1; j < midToEnd.Count; j++)
|
||
{
|
||
newPoint.Add(midToEnd[j]);
|
||
}
|
||
}
|
||
Point lastPoint = points[0].ToPoint();
|
||
Point firstPoint = newPoint[0].ToPoint();
|
||
if (GetDistance(lastPoint, firstPoint) > 1.0)
|
||
{
|
||
newPoint.Add(new StylusPoint(lastPoint.X, lastPoint.Y, 0.4f));
|
||
}
|
||
}
|
||
else
|
||
{
|
||
return points;
|
||
}
|
||
return newPoint;
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// 在两点之间生成多个点，用于增加图形边缘的点密度
|
||
/// </summary>
|
||
private StylusPointCollection GeneratePointsBetween(Point start, Point end, float startPressure, float endPressure, double minPointInterval = 8.0)
|
||
{
|
||
var result = new StylusPointCollection();
|
||
double distance = GetDistance(start, end);
|
||
|
||
if (distance < minPointInterval)
|
||
{
|
||
result.Add(new StylusPoint(start.X, start.Y, startPressure));
|
||
result.Add(new StylusPoint(end.X, end.Y, endPressure));
|
||
return result;
|
||
}
|
||
|
||
int pointCount = Math.Max(2, (int)(distance / minPointInterval) + 1);
|
||
|
||
result.Add(new StylusPoint(start.X, start.Y, startPressure));
|
||
|
||
for (int i = 1; i < pointCount - 1; i++)
|
||
{
|
||
double ratio = (double)i / (pointCount - 1);
|
||
double pressure = startPressure + (endPressure - startPressure) * ratio;
|
||
double x = start.X + (end.X - start.X) * ratio;
|
||
double y = start.Y + (end.Y - start.Y) * ratio;
|
||
result.Add(new StylusPoint(x, y, (float)pressure));
|
||
}
|
||
|
||
result.Add(new StylusPoint(end.X, end.Y, endPressure));
|
||
|
||
return result;
|
||
}
|
||
|
||
public StylusPointCollection GenerateFakePressureRectangle(StylusPointCollection points)
|
||
{
|
||
var newPoint = new StylusPointCollection();
|
||
|
||
if (Settings.InkToShape.IsInkToShapeNoFakePressureRectangle || penType == 1)
|
||
{
|
||
if (points.Count >= 4)
|
||
{
|
||
for (int i = 0; i < 4; i++)
|
||
{
|
||
Point start = points[i].ToPoint();
|
||
Point end = points[(i + 1) % 4].ToPoint();
|
||
var edgePoints = GeneratePointsBetween(start, end, 0.5f, 0.5f, 8.0);
|
||
if (i == 0)
|
||
{
|
||
foreach (var pt in edgePoints)
|
||
{
|
||
newPoint.Add(pt);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
for (int j = 1; j < edgePoints.Count; j++)
|
||
{
|
||
newPoint.Add(edgePoints[j]);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
return points;
|
||
}
|
||
return newPoint;
|
||
}
|
||
|
||
if (points.Count >= 4)
|
||
{
|
||
for (int i = 0; i < 4; i++)
|
||
{
|
||
Point start = points[i].ToPoint();
|
||
Point end = points[(i + 1) % 4].ToPoint();
|
||
|
||
Point midPoint = GetCenterPoint(start, end);
|
||
|
||
var startToMid = GeneratePointsBetween(start, midPoint, 0.4f, 0.8f, 8.0);
|
||
if (i == 0)
|
||
{
|
||
foreach (var pt in startToMid)
|
||
{
|
||
newPoint.Add(pt);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
for (int j = 1; j < startToMid.Count; j++)
|
||
{
|
||
newPoint.Add(startToMid[j]);
|
||
}
|
||
}
|
||
|
||
var midToEnd = GeneratePointsBetween(midPoint, end, 0.8f, 0.4f, 8.0);
|
||
for (int j = 1; j < midToEnd.Count; j++)
|
||
{
|
||
newPoint.Add(midToEnd[j]);
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
return points;
|
||
}
|
||
|
||
return newPoint;
|
||
}
|
||
|
||
public Point GetCenterPoint(Point point1, Point point2)
|
||
{
|
||
return new Point((point1.X + point2.X) / 2, (point1.Y + point2.Y) / 2);
|
||
}
|
||
|
||
public StylusPoint GetCenterPoint(StylusPoint point1, StylusPoint point2)
|
||
{
|
||
return new StylusPoint((point1.X + point2.X) / 2, (point1.Y + point2.Y) / 2);
|
||
}
|
||
|
||
// 分辨率自适应：以1080P为基准，返回当前分辨率下的阈值倍数
|
||
private double GetResolutionScale()
|
||
{
|
||
// 以1920x1080为基准
|
||
double baseWidth = 1920.0;
|
||
double baseHeight = 1080.0;
|
||
double screenWidth = SystemParameters.PrimaryScreenWidth;
|
||
double screenHeight = SystemParameters.PrimaryScreenHeight;
|
||
// 取宽高平均缩放，防止极端比例
|
||
double scaleW = screenWidth / baseWidth;
|
||
double scaleH = screenHeight / baseHeight;
|
||
return (scaleW + scaleH) / 2.0;
|
||
}
|
||
|
||
#region 矩形参考线系统
|
||
|
||
/// <summary>
|
||
/// 处理矩形参考线系统
|
||
/// </summary>
|
||
private void ProcessRectangleGuideLines(Stroke newStroke)
|
||
{
|
||
// 只有启用矩形识别时才处理
|
||
if (!Settings.InkToShape.IsInkToShapeRectangle) return;
|
||
|
||
// 检查新笔画是否为直线
|
||
if (!IsPotentialStraightLine(newStroke)) return;
|
||
|
||
Point startPoint = newStroke.StylusPoints[0].ToPoint();
|
||
Point endPoint = newStroke.StylusPoints[newStroke.StylusPoints.Count - 1].ToPoint();
|
||
|
||
// 创建新的参考线
|
||
var newGuideLine = new RectangleGuideLine(newStroke, startPoint, endPoint);
|
||
|
||
// 清理过期的参考线（超过30秒的）
|
||
CleanupExpiredGuideLines();
|
||
|
||
// 添加新参考线
|
||
rectangleGuideLines.Add(newGuideLine);
|
||
|
||
// 检查是否可以构成矩形
|
||
CheckForRectangleFormation();
|
||
}
|
||
|
||
/// <summary>
|
||
/// 清理过期的参考线
|
||
/// </summary>
|
||
private void CleanupExpiredGuideLines()
|
||
{
|
||
var expireTime = DateTime.Now.AddSeconds(-30); // 30秒过期
|
||
for (int i = rectangleGuideLines.Count - 1; i >= 0; i--)
|
||
{
|
||
var guideLine = rectangleGuideLines[i];
|
||
if (guideLine.CreatedTime < expireTime || !inkCanvas.Strokes.Contains(guideLine.OriginalStroke))
|
||
{
|
||
rectangleGuideLines.RemoveAt(i);
|
||
}
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// 检查是否可以构成矩形
|
||
/// </summary>
|
||
private void CheckForRectangleFormation()
|
||
{
|
||
if (rectangleGuideLines.Count < 4) return;
|
||
|
||
// 尝试找到四条能构成矩形的直线
|
||
var rectangleLines = FindRectangleLines();
|
||
if (rectangleLines != null && rectangleLines.Count == 4)
|
||
{
|
||
// 创建矩形并替换原有直线
|
||
CreateRectangleFromLines(rectangleLines);
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// 寻找能构成矩形的四条直线
|
||
/// </summary>
|
||
private List<RectangleGuideLine> FindRectangleLines()
|
||
{
|
||
// 按时间排序，优先考虑最近绘制的直线
|
||
var sortedLines = rectangleGuideLines.OrderByDescending(l => l.CreatedTime).ToList();
|
||
|
||
// 尝试不同的四条直线组合
|
||
for (int i = 0; i < sortedLines.Count - 3; i++)
|
||
{
|
||
for (int j = i + 1; j < sortedLines.Count - 2; j++)
|
||
{
|
||
for (int k = j + 1; k < sortedLines.Count - 1; k++)
|
||
{
|
||
for (int l = k + 1; l < sortedLines.Count; l++)
|
||
{
|
||
var lines = new List<RectangleGuideLine> { sortedLines[i], sortedLines[j], sortedLines[k], sortedLines[l] };
|
||
if (CanFormRectangle(lines))
|
||
{
|
||
return lines;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
return null;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 判断四条直线是否能构成矩形
|
||
/// </summary>
|
||
private bool CanFormRectangle(List<RectangleGuideLine> lines)
|
||
{
|
||
if (lines.Count != 4) return false;
|
||
|
||
// 分类水平线和垂直线
|
||
var horizontalLines = lines.Where(l => l.IsHorizontal).ToList();
|
||
var verticalLines = lines.Where(l => l.IsVertical).ToList();
|
||
|
||
// 必须有2条水平线和2条垂直线
|
||
if (horizontalLines.Count != 2 || verticalLines.Count != 2) return false;
|
||
|
||
// 检查端点相交关系
|
||
return CheckEndpointConnections(horizontalLines, verticalLines);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 检查端点相交关系
|
||
/// </summary>
|
||
private bool CheckEndpointConnections(List<RectangleGuideLine> horizontalLines, List<RectangleGuideLine> verticalLines)
|
||
{
|
||
// 收集所有端点
|
||
var allEndpoints = new List<Point>();
|
||
foreach (var line in horizontalLines.Concat(verticalLines))
|
||
{
|
||
allEndpoints.Add(line.StartPoint);
|
||
allEndpoints.Add(line.EndPoint);
|
||
}
|
||
|
||
// 检查是否有4个相交点（允许一定误差）
|
||
var intersectionPoints = new List<Point>();
|
||
|
||
foreach (var hLine in horizontalLines)
|
||
{
|
||
foreach (var vLine in verticalLines)
|
||
{
|
||
var intersection = GetLineIntersection(hLine, vLine);
|
||
if (intersection.HasValue)
|
||
{
|
||
// 检查交点是否在两条线段的端点附近
|
||
if (IsPointNearLineEndpoints(intersection.Value, hLine) &&
|
||
IsPointNearLineEndpoints(intersection.Value, vLine))
|
||
{
|
||
intersectionPoints.Add(intersection.Value);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
// 需要有4个交点才能构成矩形
|
||
return intersectionPoints.Count >= 4;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 计算两条直线的交点
|
||
/// </summary>
|
||
private Point? GetLineIntersection(RectangleGuideLine line1, RectangleGuideLine line2)
|
||
{
|
||
double x1 = line1.StartPoint.X, y1 = line1.StartPoint.Y;
|
||
double x2 = line1.EndPoint.X, y2 = line1.EndPoint.Y;
|
||
double x3 = line2.StartPoint.X, y3 = line2.StartPoint.Y;
|
||
double x4 = line2.EndPoint.X, y4 = line2.EndPoint.Y;
|
||
|
||
double denom = (x1 - x2) * (y3 - y4) - (y1 - y2) * (x3 - x4);
|
||
if (Math.Abs(denom) < 1e-10) return null; // 平行线
|
||
|
||
double t = ((x1 - x3) * (y3 - y4) - (y1 - y3) * (x3 - x4)) / denom;
|
||
double u = -((x1 - x2) * (y1 - y3) - (y1 - y2) * (x1 - x3)) / denom;
|
||
|
||
double intersectionX = x1 + t * (x2 - x1);
|
||
double intersectionY = y1 + t * (y2 - y1);
|
||
|
||
return new Point(intersectionX, intersectionY);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 检查点是否在直线端点附近
|
||
/// </summary>
|
||
private bool IsPointNearLineEndpoints(Point point, RectangleGuideLine line)
|
||
{
|
||
double distToStart = GetDistance(point, line.StartPoint);
|
||
double distToEnd = GetDistance(point, line.EndPoint);
|
||
|
||
return distToStart <= RECTANGLE_ENDPOINT_THRESHOLD || distToEnd <= RECTANGLE_ENDPOINT_THRESHOLD;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 从四条直线创建矩形
|
||
/// </summary>
|
||
private void CreateRectangleFromLines(List<RectangleGuideLine> lines)
|
||
{
|
||
try
|
||
{
|
||
// 计算矩形的四个角点
|
||
var corners = CalculateRectangleCorners(lines);
|
||
if (corners == null || corners.Count != 4) return;
|
||
|
||
// 创建矩形笔画
|
||
var pointList = new List<Point>(corners) { corners[0] }; // 闭合矩形
|
||
var point = new StylusPointCollection(pointList);
|
||
var rectangleStroke = new Stroke(GenerateFakePressureRectangle(point))
|
||
{
|
||
DrawingAttributes = inkCanvas.DefaultDrawingAttributes.Clone()
|
||
};
|
||
|
||
// 移除原有的四条直线
|
||
SetNewBackupOfStroke();
|
||
_currentCommitType = CommitReason.ShapeRecognition;
|
||
|
||
foreach (var line in lines)
|
||
{
|
||
if (inkCanvas.Strokes.Contains(line.OriginalStroke))
|
||
{
|
||
inkCanvas.Strokes.Remove(line.OriginalStroke);
|
||
}
|
||
}
|
||
|
||
// 添加新的矩形
|
||
inkCanvas.Strokes.Add(rectangleStroke);
|
||
_currentCommitType = CommitReason.UserInput;
|
||
|
||
// 清理参考线
|
||
foreach (var line in lines)
|
||
{
|
||
rectangleGuideLines.Remove(line);
|
||
}
|
||
|
||
// 清空新笔画集合，避免重复处理
|
||
newStrokes = new StrokeCollection();
|
||
|
||
Debug.WriteLine("成功创建矩形参考线矩形");
|
||
}
|
||
catch (Exception ex)
|
||
{
|
||
Debug.WriteLine($"创建矩形时出错: {ex.Message}");
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// 计算矩形的四个角点
|
||
/// </summary>
|
||
private List<Point> CalculateRectangleCorners(List<RectangleGuideLine> lines)
|
||
{
|
||
var horizontalLines = lines.Where(l => l.IsHorizontal).ToList();
|
||
var verticalLines = lines.Where(l => l.IsVertical).ToList();
|
||
|
||
if (horizontalLines.Count != 2 || verticalLines.Count != 2) return null;
|
||
|
||
var corners = new List<Point>();
|
||
|
||
// 计算四个交点
|
||
foreach (var hLine in horizontalLines)
|
||
{
|
||
foreach (var vLine in verticalLines)
|
||
{
|
||
var intersection = GetLineIntersection(hLine, vLine);
|
||
if (intersection.HasValue)
|
||
{
|
||
corners.Add(intersection.Value);
|
||
}
|
||
}
|
||
}
|
||
|
||
if (corners.Count != 4) return null;
|
||
|
||
// 按顺序排列角点（顺时针或逆时针）
|
||
return SortRectangleCorners(corners);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 按顺序排列矩形角点
|
||
/// </summary>
|
||
private List<Point> SortRectangleCorners(List<Point> corners)
|
||
{
|
||
if (corners.Count != 4) return corners;
|
||
|
||
// 计算中心点
|
||
double centerX = corners.Average(p => p.X);
|
||
double centerY = corners.Average(p => p.Y);
|
||
var center = new Point(centerX, centerY);
|
||
|
||
// 按角度排序
|
||
return corners.OrderBy(p => Math.Atan2(p.Y - center.Y, p.X - center.X)).ToList();
|
||
}
|
||
|
||
#endregion
|
||
}
|
||
} |