public static RectangleStroke GetRectangleStroke(StylusPointCollection stylusPoints)
{
var count = stylusPoints.Count;
for (int i = 1; i <= count - 2; i++)
{
stylusPoints.RemoveAt(1);
}
return(new RectangleStroke(stylusPoints));
}
protected override void OnStylusMove(RawStylusInput rawStylusInput)
{
StylusPointCollection stylusPoints = rawStylusInput.GetStylusPoints();
//// 让收集到的点只剩下起点和终点
while (stylusPoints.Count > 2)
{
stylusPoints.RemoveAt(stylusPoints.Count - 2);
}
this.Reset(Stylus.CurrentStylusDevice, stylusPoints);
base.OnStylusMove(rawStylusInput);
}
public static StylusPointCollection toPolyline(StylusPointCollection points_)
{
const int separation = 3;
if (points_.Count <= 1)
{
return(new StylusPointCollection(points_));
}
StylusPointCollection points = resample(points_, 3);
StylusPointCollection r = new StylusPointCollection();
r.Add(points[0]);
int i;
for (i = separation; i + separation < points.Count; ++i)
{
StylusPoint prev = points[i - separation], cur = points[i], next = points[i + separation];
double dx1 = cur.X - prev.X, dy1 = cur.Y - prev.Y;
double n1 = Math.Sqrt(dx1 * dx1 + dy1 * dy1);
dx1 /= n1; dy1 /= n1;
double dx2 = next.X - cur.X, dy2 = next.Y - cur.Y;
double n2 = Math.Sqrt(dx2 * dx2 + dy2 * dy2);
dx2 /= n2; dy2 /= n2;
if (dx1 * dx2 + dy1 * dy2 < 0.7)
{
if (i < separation * 2)
{
r.RemoveAt(0);
}
r.Add(points[i]);
i = i + separation * 2 - 1;
}
}
if (i + separation == points.Count)
{
r.Add(points[points.Count - 1]);
}
return(r);
}
public static StylusPointCollection toPolyline(StylusPointCollection points_)
{
const int separation = 3;
if (points_.Count <= 1) return new StylusPointCollection(points_);
StylusPointCollection points = resample(points_, 3);
StylusPointCollection r = new StylusPointCollection();
r.Add(points[0]);
int i;
for (i = separation; i + separation < points.Count; ++i)
{
StylusPoint prev = points[i - separation], cur = points[i], next = points[i + separation];
double dx1 = cur.X - prev.X, dy1 = cur.Y - prev.Y;
double n1 = Math.Sqrt(dx1 * dx1 + dy1 * dy1);
dx1 /= n1; dy1 /= n1;
double dx2 = next.X - cur.X, dy2 = next.Y - cur.Y;
double n2 = Math.Sqrt(dx2 * dx2 + dy2 * dy2);
dx2 /= n2; dy2 /= n2;
if (dx1 * dx2 + dy1 * dy2 < 0.7)
{
if (i < separation*2)
{
r.RemoveAt(0);
}
r.Add(points[i]);
i = i + separation * 2 - 1;
}
}
if (i + separation == points.Count)
{
r.Add(points[points.Count - 1]);
}
return r;
}
