public IEnumerable <Annotation> InferAnnotations(NewPrimitive toBeSnapped, SnappedPrimitive toBeAnnotated)
{
var toBeAnnotatedCurves = toBeAnnotated.FeatureCurves;
var candidateTriples =
from i in Enumerable.Range(0, toBeAnnotatedCurves.Length)
from j in Enumerable.Range(i + 1, toBeAnnotatedCurves.Length - i - 1)
// at this point (i, j) are all the possible pairs of curves without repetitions
let allExistingCurves = sessionData.FeatureCurves.Except(toBeAnnotatedCurves)
from existingCurve in allExistingCurves
where AreGoodCandidates(toBeAnnotatedCurves[i], toBeAnnotatedCurves[j], existingCurve)
select new
{
FistNewCurve = toBeAnnotatedCurves[i],
SecondNewCurve = toBeAnnotatedCurves[j],
ExistingCurve = existingCurve
};
if (candidateTriples.Any())
{
var bestCandidate = candidateTriples.Minimizer(triple => ProximityMeasure(triple.FistNewCurve, triple.SecondNewCurve, triple.ExistingCurve));
var annotation = new ColinearCenters
{
Elements = UtilsEnumerable.ArrayOf(bestCandidate.FistNewCurve, bestCandidate.SecondNewCurve, bestCandidate.ExistingCurve)
};
return(UtilsEnumerable.Singleton(annotation));
}
else
{
return(Enumerable.Empty <Annotation>());
}
}
private Term[] GetConcreteAnnotationTerm(ColinearCenters colinearCenters)
{
var terms = new List <Term>();
if (colinearCenters.Elements.Length >= 3)
{
var centers = from elem in colinearCenters.Elements
select elem.Center;
foreach (var triple in centers.SeqTripples())
{
var u = triple.Item1 - triple.Item2;
var v = triple.Item2 - triple.Item3;
terms.AddRange(VectorParallelism(u, v));
}
}
return(terms.ToArray());
}
