/// <summary>
/// Calculate the parameter corresponding to our AlignFeature
/// </summary>
private void calculateParam(Shape s)
{
Featurefy.FeatureStroke fs = new Featurefy.FeatureStroke(_template);
List <AlignFeature> keys = new List <AlignFeature>(_tf.Count);
foreach (AlignFeature af in _tf.Keys)
{
keys.Add(af);
}
foreach (AlignFeature af in keys)
{
switch (af)
{
case AlignFeature.Curvature:
_tf[af] = fs.Curvature.AverageCurvature;
break;
case AlignFeature.AngleTraveled:
_tf[af] = fs.Curvature.TotalAngle;
break;
case AlignFeature.AngleTraveledRank:
List <Substroke> ordered_substrokes = new List <Substroke>(s.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));
});
_tf[af] = ordered_substrokes.IndexOf(_template);
break;
case AlignFeature.Length:
double len = 0.0;
foreach (Substroke test in s.SubstrokesL)
{
len += test.SpatialLength;
}
_tf[af] = _template.SpatialLength / len;
break;
case AlignFeature.LengthRank:
List <Substroke> lr_ordered_substrokes = new List <Substroke>(s.SubstrokesL);
lr_ordered_substrokes.Sort(delegate(Substroke lhs, Substroke rhs)
{
return(rhs.SpatialLength.CompareTo(lhs.SpatialLength));
}
);
_tf[af] = lr_ordered_substrokes.IndexOf(_template);
break;
}
}
}
/// <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);
}
