} //顺时针
private void canvas_MouseUp(object sender, MouseButtonEventArgs e)
{
ptEnd = e.MouseDevice.GetPosition(canvas);
PathGeometry g = new PathGeometry();
PointInfo infoPrev = ptinfos.Last();
Point ptPrev = infoPrev.pt;
float len = 0;
Point pt1 = new Point();
Point pt2 = new Point();
Vector dir0 = infoPrev.dir;
pt1 = ptPrev + dir0 * lw * -0.5 / infoPrev.len;
pt2 = ptPrev + dir0 * lw * 0.5 / infoPrev.len;
PathFigure pf = new PathFigure();
pf.Segments.Add(new LineSegment(ptPrev, true));
pf.Segments.Add(new LineSegment(pt1, true));
pf.Segments.Add(new LineSegment(ptEnd, true));
pf.Segments.Add(new LineSegment(pt2, true));
pf.StartPoint = ptPrev;
pf.IsClosed = true;
g.Figures.Add(pf);
geo.AddGeometry(g);
geos.Add(geo);
GeometryDrawing drawing = new GeometryDrawing(Brushes.Transparent, new Pen(Brushes.Black, 1), g);
DrawingContext dc = dv.RenderOpen();
dc.DrawDrawing(drawing);
dc.Close();
bmp.Render(dv);
PointInfo info = new PointInfo();
info.pt = ptEnd;
info.len = len;
info.dir = new Vector();
info.perpendicular = new Vector();
tiwp.Clear();
tiwp.Add(Regconize()); //添加识别到的文字到控件
ptinfos.Clear();
}
private void Canvas_MouseMove(object sender, MouseEventArgs e)
{
Point pt = e.GetPosition(canvas);
Vector dir = new Vector();
double len = 0.0;
Vector vdir = new Vector();
PathGeometry g = new PathGeometry();
if (e.LeftButton == MouseButtonState.Pressed)
{
DrawingContext dc = dv.RenderOpen();
if (ptinfos.Count == 1)
{
Point pt1, pt2;
len = Math.Sqrt((pt.X - ptStart.X) * (pt.X - ptStart.X) + (pt.Y - ptStart.Y) * (pt.Y - ptStart.Y));
dir = ptStart - pt;
dir.Normalize();
vdir = Perpendicular(dir);
// dir1 = New Vector(0, 0) - dir0
pt1 = pt + vdir * lw * 0.5 / (double)len;
pt2 = pt + vdir * lw * -0.5 / (double)len;
PathFigure pf = new PathFigure();
pf.Segments.Add(new LineSegment(ptStart, true));
pf.Segments.Add(new LineSegment(pt1, true));
pf.Segments.Add(new LineSegment(pt2, true));
pf.StartPoint = ptStart;
pf.IsClosed = true;
g.Figures.Add(pf);
geo.AddGeometry(g);
}
else if (ptinfos != null && ptinfos.Count > 0)
{
PointInfo infoPrev = ptinfos.Last();
Point ptPrev = infoPrev.pt;
Point pt1, pt2, pt3, pt4;
len = Math.Sqrt((pt.X - ptPrev.X) * (pt.X - ptPrev.X) + (pt.Y - ptPrev.Y) * (pt.Y - ptPrev.Y));
dir = ptPrev - pt;
dir.Normalize();
Vector dir0 = infoPrev.perpendicular;
vdir = Perpendicular(dir);
pt1 = ptPrev + dir0 * lw * 0.5 / (double)infoPrev.len;
pt2 = ptPrev + dir0 * lw * -0.5 / (double)infoPrev.len;
pt3 = pt + vdir * lw * 0.5 / (double)len;
pt4 = pt + vdir * lw * -0.5 / (double)len;
PathFigure pf = new PathFigure();
pf.Segments.Add(new LineSegment(ptPrev, true));
pf.Segments.Add(new LineSegment(pt1, true));
pf.Segments.Add(new LineSegment(pt3, true));
pf.Segments.Add(new LineSegment(pt4, true));
pf.Segments.Add(new LineSegment(pt2, true));
pf.StartPoint = ptPrev;
pf.IsClosed = true;
g.Figures.Add(pf);
geo.AddGeometry(g);
}
GeometryDrawing drawing = new GeometryDrawing(Brushes.Transparent, new Pen(Brushes.Black, 1), g);
dc.DrawDrawing(drawing);
dc.Close();
bmp.Render(dv);
PointInfo info;
info.pt = pt;
info.dir = dir;
info.len = (float)len;
info.perpendicular = vdir;
ptinfos.Add(info);
}
}