private void DrawStrokePart(StrokePart part, Graphics graphics, Pen pen1, Pen pen2)
{
Vector2f topLeft = new Vector2f(10, 10);
Vector2f scale = new Vector2f(0.01f, 0.01f);
if (allStrokes.Count > 0)
{
KanjiMatcher.CalcResize(allStrokes, matchedTemplate, out topLeft, out scale);
}
graphics.DrawLine(pen1,
new PointF(topLeft.X + part.StartPoint.X / scale.X, topLeft.Y + part.StartPoint.Y / scale.Y),
new PointF(topLeft.X + part.EndPoint.X / scale.X, topLeft.Y + part.EndPoint.Y / scale.Y));
const int sections = 64;
PointF[] roundPoints = new PointF[sections + 1];
Vector2f delta = part.EndPoint - part.StartPoint;
Vector2f ortho = new Vector2f(delta.Y, -delta.X);
for (int i = 0; i <= sections; i++)
{
float pos = (float)i / sections;
Vector2f point = part.GetGlobalFromProgress(pos);
float param = 1 - (2 * pos - 1) * (2 * pos - 1);
point = topLeft + new Vector2f(point.X / scale.X, point.Y / scale.Y);
roundPoints[i] = new PointF(point.X, point.Y);
}
graphics.DrawLines(pen2, roundPoints);
}
StrokePartMatch MatchLine(int start, int end)
{
StrokePart line = new StrokePart(Input[start], Input[end]);
float multi = line.Length * 0.5f;
float a = 0, b = 0, c = 0; //Parabel coefficients
for (int i = start; i <= end; i++)
{
Vector2f point = Input[i];
float weight = Weight[i];
float scaledX = line.GetParallelPositionScaled(point);
float unscaledY = line.GetOrthoPositionUnscaled(point);
float unscaledOutside = (Math.Abs(scaledX) - 1) * multi;
if (unscaledOutside > 0)
{
c += weight * (unscaledOutside * unscaledOutside + unscaledY * unscaledY);
}
else
{
float param = (1 - scaledX * scaledX) * multi;
a += weight * param * param;
b += weight * (-2) * param * unscaledY;
c += weight * unscaledY * unscaledY;
}
}
float optimalCurve = -b / (2 * a);
var result = new StrokePartMatch(line.StartPoint, line.EndPoint, optimalCurve);
result.DeltaCurveCost = a;
result.MinCost = c - b * b / (4 * a);
return(result);
}
public static string StrokeToString(IEnumerable <StrokePart> parts)
{
List <StrokePart> partsList = parts.ToList();
string result = "";
for (int i = 0; i < partsList.Count; i++)
{
StrokePart part = partsList[i];
bool includeEnd = i == partsList.Count - 1;
result += part.ToString(includeEnd);
}
return(result);
}
private void DrawStrokePart(StrokePart part, Graphics graphics, Pen pen1, Pen pen2)
{
Vector2f topLeft = new Vector2f(10, 10);
Vector2f scale = new Vector2f(0.01f, 0.01f);
if (allStrokes.Count > 0)
KanjiMatcher.CalcResize(allStrokes, matchedTemplate, out topLeft, out scale);
graphics.DrawLine(pen1,
new PointF(topLeft.X + part.StartPoint.X / scale.X, topLeft.Y + part.StartPoint.Y / scale.Y),
new PointF(topLeft.X + part.EndPoint.X / scale.X, topLeft.Y + part.EndPoint.Y / scale.Y));
const int sections = 64;
PointF[] roundPoints = new PointF[sections + 1];
Vector2f delta = part.EndPoint - part.StartPoint;
Vector2f ortho = new Vector2f(delta.Y, -delta.X);
for (int i = 0; i <= sections; i++)
{
float pos = (float)i / sections;
Vector2f point = part.GetGlobalFromProgress(pos);
float param = 1 - (2 * pos - 1) * (2 * pos - 1);
point = topLeft + new Vector2f(point.X / scale.X, point.Y / scale.Y);
roundPoints[i] = new PointF(point.X, point.Y);
}
graphics.DrawLines(pen2, roundPoints);
}
public override string ToString()
{
return(StrokePart.StrokeToString(Parts));
}
StrokePartMatch MatchLine(int start, int end)
{
StrokePart line = new StrokePart(Input[start], Input[end]);
float multi = line.Length* 0.5f;
float a = 0, b = 0, c = 0;//Parabel coefficients
for (int i = start; i <= end; i++)
{
Vector2f point = Input[i];
float weight = Weight[i];
float scaledX = line.GetParallelPositionScaled(point);
float unscaledY = line.GetOrthoPositionUnscaled(point);
float unscaledOutside = (Math.Abs(scaledX) - 1) * multi;
if (unscaledOutside > 0)
{
c += weight * (unscaledOutside * unscaledOutside + unscaledY *unscaledY );
}
else
{
float param = (1 - scaledX * scaledX) * multi;
a += weight * param * param;
b += weight * (-2) * param * unscaledY;
c += weight * unscaledY * unscaledY;
}
}
float optimalCurve = -b / (2 * a);
var result = new StrokePartMatch(line.StartPoint, line.EndPoint, optimalCurve);
result.DeltaCurveCost = a;
result.MinCost = c - b * b / (4 * a);
return result;
}
