/// <summary>
/// Get normalized strokes. Call "ClearCache" function for recalculating
/// </summary>
/// <param name="height">Height of bounding box after the normalization</param>
/// <param name="sortPos">Sort strokes in order of x coordinate of gravity point</param>
/// <returns></returns>
public List<AnalysisPenStroke> GetNormalizedStrokes(double height, bool sortPos)
{
if (this.normalizedStrokes == null)
{
List<AnalysisPenStroke> strokes = new List<AnalysisPenStroke>(this.Strokes);
Rect gr = GetBounds();
double scale = height / gr.Height;
// position sort
if (sortPos)
{
strokes = AnalysisPenStroke.SortByCenterX(strokes);
}
// normalization
List<AnalysisPenStroke> nstrokes = new List<AnalysisPenStroke>();
foreach (AnalysisPenStroke s in strokes)
{
AnalysisPenStroke ns = new AnalysisPenStroke();
Rect sr = s.BoundingBox;
foreach (AnalysisPenPoint p in s.Points)
{
AnalysisPenPoint np = new AnalysisPenPoint(p.Time, (p.X - sr.Left) * scale, (p.Y - sr.Top) * scale);
ns.Points.Add(np);
//Console.Write("(" + np.X + "," + np.Y + "),");
}
nstrokes.Add(ns);
//Console.WriteLine();
}
this.normalizedStrokes = nstrokes;
}
return this.normalizedStrokes;
}
/// <summary>
/// Generate stroke object from serialized json string
/// </summary>
/// <param name="jsonStr"></param>
public AnalysisPenStroke(String jsonStr)
{
var json = DynamicJson.Parse(jsonStr);
this.Points = new List<AnalysisPenPoint>();
foreach (var p in json.stroke)
{
AnalysisPenPoint ppoint = new AnalysisPenPoint((ulong)p.time, (int)p.x, (int)p.y);
this.Points.Add(ppoint);
}
}
/// <summary>
/// Join an answer step after the answer step
/// </summary>
/// <param name="step"></param>
public void JoinStrokes(AnswerStep step)
{
// Calculate offset value for coordinate transformation
Rect orgBounds = this.GetBounds();
Rect addBounds = step.GetBounds();
Point endPoint = new Point(orgBounds.Left, (orgBounds.Top + orgBounds.Bottom) / 2.0);
Point startPoint = new Point(addBounds.Left, (addBounds.Top + addBounds.Bottom) / 2.0);
Point offsetPoint = new Point(endPoint.X - startPoint.X, endPoint.Y - startPoint.Y);
// transform coordinates to join anter the origin strokes
foreach (AnalysisPenStroke addStroke in step.Strokes)
{
AnalysisPenStroke s = new AnalysisPenStroke();
foreach (AnalysisPenPoint addPoint in addStroke.Points)
{
AnalysisPenPoint p = new AnalysisPenPoint(addPoint.Time, addPoint.X + offsetPoint.X, addPoint.Y + offsetPoint.Y);
s.Points.Add(p);
}
this.Strokes.Add(s);
}
}