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using System.Linq;
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using System.Windows;
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using System.Windows.Ink;
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using System.Windows.Media;
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namespace Ink_Canvas.Helpers
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{
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public class InkRecognizeHelper
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{
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//识别形状
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public static ShapeRecognizeResult RecognizeShape(StrokeCollection strokes)
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{
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if (strokes == null || strokes.Count == 0)
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return default;
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var analyzer = new InkAnalyzer();
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analyzer.AddStrokes(strokes);
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analyzer.SetStrokesType(strokes, System.Windows.Ink.StrokeType.Drawing);
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AnalysisAlternate analysisAlternate = null;
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int strokesCount = strokes.Count;
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var sfsaf = analyzer.Analyze();
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if (sfsaf.Successful)
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{
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var alternates = analyzer.GetAlternates();
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if (alternates.Count > 0)
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{
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while ((!alternates[0].Strokes.Contains(strokes.Last()) ||
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!IsContainShapeType(((InkDrawingNode)alternates[0].AlternateNodes[0]).GetShapeName()))
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&& strokesCount >= 2)
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{
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analyzer.RemoveStroke(strokes[strokes.Count - strokesCount]);
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strokesCount--;
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sfsaf = analyzer.Analyze();
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if (sfsaf.Successful)
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{
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alternates = analyzer.GetAlternates();
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}
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}
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analysisAlternate = alternates[0];
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}
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}
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analyzer.Dispose();
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if (analysisAlternate != null && analysisAlternate.AlternateNodes.Count > 0)
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{
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var node = analysisAlternate.AlternateNodes[0] as InkDrawingNode;
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return new ShapeRecognizeResult(node.Centroid, node.HotPoints, analysisAlternate, node);
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}
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return default;
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}
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public static bool IsContainShapeType(string name)
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{
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if (name.Contains("Triangle") || name.Contains("Circle") ||
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name.Contains("Rectangle") || name.Contains("Diamond") ||
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name.Contains("Parallelogram") || name.Contains("Square")
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|| name.Contains("Ellipse"))
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{
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return true;
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}
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return false;
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}
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}
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//Recognizer 的实现
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public class ShapeRecognizeResult
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{
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public ShapeRecognizeResult(Point centroid, PointCollection hotPoints, AnalysisAlternate analysisAlternate, InkDrawingNode node)
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{
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Centroid = centroid;
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HotPoints = hotPoints;
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AnalysisAlternate = analysisAlternate;
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InkDrawingNode = node;
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}
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public AnalysisAlternate AnalysisAlternate { get; }
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public Point Centroid { get; set; }
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public PointCollection HotPoints { get; }
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public InkDrawingNode InkDrawingNode { get; }
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}
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/// <summary>
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/// 图形识别类
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/// </summary>
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//public class ShapeRecogniser
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//{
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// public InkAnalyzer _inkAnalyzer = null;
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// private ShapeRecogniser()
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// {
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// this._inkAnalyzer = new InkAnalyzer
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// {
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// AnalysisModes = AnalysisModes.AutomaticReconciliationEnabled
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// };
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// }
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// /// <summary>
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// /// 根据笔迹集合返回图形名称字符串
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// /// </summary>
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// /// <param name="strokeCollection"></param>
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// /// <returns></returns>
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// public InkDrawingNode Recognition(StrokeCollection strokeCollection)
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// {
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// if (strokeCollection == null)
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// {
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// //MessageBox.Show("dddddd");
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// return null;
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// }
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// InkDrawingNode result = null;
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// try
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// {
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// this._inkAnalyzer.AddStrokes(strokeCollection);
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// if (this._inkAnalyzer.Analyze().Successful)
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// {
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// result = _internalAnalyzer(this._inkAnalyzer);
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// this._inkAnalyzer.RemoveStrokes(strokeCollection);
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// }
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// }
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// catch (System.Exception ex)
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// {
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// //result = ex.Message;
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// System.Diagnostics.Debug.WriteLine(ex.Message);
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// }
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// return result;
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// }
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// /// <summary>
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// /// 实现笔迹的分析，返回图形对应的字符串
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// /// 你在实际的应用中根据返回的字符串来生成对应的Shape
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// /// </summary>
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// /// <param name="ink"></param>
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// /// <returns></returns>
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// private InkDrawingNode _internalAnalyzer(InkAnalyzer ink)
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// {
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// try
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// {
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// ContextNodeCollection nodecollections = ink.FindNodesOfType(ContextNodeType.InkDrawing);
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// foreach (ContextNode node in nodecollections)
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// {
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// InkDrawingNode drawingNode = node as InkDrawingNode;
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// if (drawingNode != null)
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// {
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// return drawingNode;//.GetShapeName();
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// }
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// }
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// }
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// catch (System.Exception ex)
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// {
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// System.Diagnostics.Debug.WriteLine(ex.Message);
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// }
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// return null;
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// }
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// private static ShapeRecogniser instance = null;
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// public static ShapeRecogniser Instance
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// {
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// get
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// {
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// return instance == null ? (instance = new ShapeRecogniser()) : instance;
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// }
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// }
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//}
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//用于自动控制其他形状相对于圆的位置
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public class Circle
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{
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public Circle(Point centroid, double r, Stroke stroke)
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{
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Centroid = centroid;
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R = r;
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Stroke = stroke;
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}
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public Point Centroid { get; set; }
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public double R { get; set; }
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public Stroke Stroke { get; set; }
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}
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}
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