public IEnumerable <Annotation> InferAnnotations(NewPrimitive toBeSnapped, SnappedPrimitive toBeAnnotated)
{
// we skip orthogonality inference for spheres
if (toBeSnapped is NewSphere)
{
return(Enumerable.Empty <Annotation>());
}
var curvesToSkip = toBeAnnotated.FeatureCurves.Concat(GetSphereFeatureCurves()).ToArray();
var candidates =
from firstCurve in toBeAnnotated.FeatureCurves
from secondCurve in sessionData.FeatureCurves.Except(curvesToSkip)
where AreGoodCandidates(firstCurve, secondCurve)
select Tuple.Create(firstCurve, secondCurve);
if (candidates.Any())
{
var bestCandidate = candidates.Minimizer(pair => DistanceBetweenCurves(pair.Item1, pair.Item2));
var newFeatureCurve = bestCandidate.Item1;
var existingFeatureCurve = bestCandidate.Item2;
Annotation curveOrthogonality = new OrthogonalAxis
{
Elements = new FeatureCurve[] { newFeatureCurve, existingFeatureCurve }
};
return(UtilsEnumerable.ArrayOf(curveOrthogonality));
}
else
{
return(Enumerable.Empty <Annotation>());
}
}
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>());
}
}