85 lines
3.4 KiB
C#
85 lines
3.4 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.Windows;
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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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namespace Ink_Canvas {
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public partial class MainWindow : PerformanceTransparentWin {
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public StrokeCollection DrawShapeCore(PointCollection pts, ShapeDrawingType type, bool doNotDisturbutePoints, bool isPreview) {
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// 线
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if (type == MainWindow.ShapeDrawingType.Line ||
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type == MainWindow.ShapeDrawingType.DashedLine ||
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type == MainWindow.ShapeDrawingType.DottedLine ||
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type == MainWindow.ShapeDrawingType.ArrowOneSide ||
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type == MainWindow.ShapeDrawingType.ArrowTwoSide) {
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if (pts.Count != 2) throw new Exception("传入的点个数不是2个");
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var stk = new IccStroke(new StylusPointCollection() {
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new StylusPoint(pts[0].X, pts[0].Y),
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new StylusPoint(pts[1].X, pts[1].Y),
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}, inkCanvas.DefaultDrawingAttributes.Clone()) {
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IsDistributePointsOnLineShape = !doNotDisturbutePoints,
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};
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stk.AddPropertyData(IccStroke.StrokeIsShapeGuid, true);
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stk.AddPropertyData(IccStroke.StrokeShapeTypeGuid, (int)type);
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return new StrokeCollection() { stk };
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}
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return new StrokeCollection();
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}
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public static class ShapeDrawingHelper {
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/// <summary>
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/// 根据给定的两个点计算角度
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/// </summary>
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/// <param name="firstPoint"></param>
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/// <param name="lastPoint"></param>
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/// <returns></returns>
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public static double CaculateRotateAngleByGivenTwoPoints(Point firstPoint, Point lastPoint) {
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var vec1 = new double[] {
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lastPoint.X - firstPoint.X ,
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lastPoint.Y - firstPoint.Y
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};
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var vec_base = new double[] { 0, firstPoint.Y };
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var cosine = (vec_base[0] * vec1[0] + vec_base[1] * vec1[1]) /
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(Math.Sqrt(Math.Pow(vec_base[0],2) + Math.Pow(vec_base[1],2)) *
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Math.Sqrt(Math.Pow(vec1[0],2) + Math.Pow(vec1[1],2)));
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var angle = Math.Acos(cosine);
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var isIn2And3Quadrant = lastPoint.X <= firstPoint.X;
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var rotateAngle = Math.Round(180 + 180 * (angle / Math.PI) * (isIn2And3Quadrant ? 1 : -1), 0);
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return rotateAngle;
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}
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public static List<Point> DistributePointsOnLine(Point start, Point end, double interval=16) {
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List<Point> points = new List<Point>();
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double dx = end.X - start.X;
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double dy = end.Y - start.Y;
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double distance = Math.Sqrt(dx * dx + dy * dy);
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int numPoints = (int)(distance / interval);
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for (int i = 0; i <= numPoints; i++) {
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double ratio = (interval * i) / distance;
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double x = start.X + ratio * dx;
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double y = start.Y + ratio * dy;
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points.Add(new Point(x, y));
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}
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return points;
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}
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public class ArrowLineConfig {
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public int ArrowWidth { get; set; } = 20;
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public int ArrowHeight { get; set; } = 7;
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}
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}
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}
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}
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