/// <summary>
/// Attempts to match a substroke with the current parameter. Returns
/// some measure of dissimilarity (that is, smaller numbers are better)
/// <remarks>Goodness measure is not comparable between AlignFeatures!</remarks>
/// </summary>
/// <param name="ss">The substroke to match</param>
private double match(Substroke ss, Shape sp, AlignFeature af)
{
Featurefy.FeatureStroke fs = new Featurefy.FeatureStroke(ss);
switch (af)
{
case AlignFeature.Curvature:
return(Math.Abs(_tf[af] - fs.Curvature.AverageCurvature));
case AlignFeature.AngleTraveled:
return(Math.Abs(_tf[af] - fs.Curvature.TotalAngle));
case AlignFeature.AngleTraveledRank:
List <Substroke> ordered_substrokes = new List <Substroke>(sp.SubstrokesL);
ordered_substrokes.Sort(delegate(Substroke lhs, Substroke rhs)
{
Featurefy.FeatureStroke lfs = new Featurefy.FeatureStroke(lhs);
Featurefy.FeatureStroke rfs = new Featurefy.FeatureStroke(rhs);
return(rfs.Curvature.TotalAngle.CompareTo(lfs.Curvature.TotalAngle));
});
return(Math.Abs(_tf[af] - ordered_substrokes.IndexOf(ss)));
case AlignFeature.Length:
double total_length = 0.0;
foreach (Substroke test in sp.SubstrokesL)
{
total_length += test.SpatialLength;
}
return(Math.Abs(ss.SpatialLength / total_length - _tf[af]));
case AlignFeature.LengthRank:
List <Substroke> lr_ordered_substrokes = new List <Substroke>(sp.SubstrokesL);
lr_ordered_substrokes.Sort(delegate(Substroke lhs, Substroke rhs)
{
return(rhs.SpatialLength.CompareTo(lhs.SpatialLength));
}
);
return(Math.Abs(_tf[af] - lr_ordered_substrokes.IndexOf(ss)));
}
return(0.0);
}
/// <summary>
/// Create a new SSA object to match against a single substroke
/// </summary>
/// <param name="ss">The Substroke to match against</param>
/// <param name="s">The shape containing the important substroke</param>
/// <param name="f">Which feature should we be aligning on the basis of?
/// <example>Congeal.Prealign.AlignFeature.Length</example></param>
public SingleStrokeAlign(Substroke ss, Shape s, AlignFeature f)
: this(ss, s, new List <AlignFeature>(new AlignFeature[] { f }))
{
// Nothing to do here
}