public static List <EdgeAggregator> Instantiate(GroundedClause c)
{
annotation.active = EngineUIBridge.JustificationSwitch.ARC_ADDITION_AXIOM;
List <EdgeAggregator> newGrounded = new List <EdgeAggregator>();
ArcInMiddle im = c as ArcInMiddle;
if (im == null)
{
return(newGrounded);
}
Addition sum = null;
// Temporarily assume that the two arcs formed by the intersection are both minor arcs
MinorArc a1 = new MinorArc(im.arc.theCircle, im.arc.endpoint1, im.point);
MinorArc a2 = new MinorArc(im.arc.theCircle, im.point, im.arc.endpoint2);
// If the intersected arc is a minor arc, this will always be true.
// If the intersected arc is a major arc, this might be true. Other case is one minor arc and one major arc.
if (Arc.BetweenMajor(im.point, im.arc))
{
// Check if both arcs are genuinely minor arcs.
// If the other endpoint falls in the new arc, then the major arc should be used instead
if (Arc.BetweenMinor(im.arc.endpoint2, a1))
{
MajorArc majorArc = new MajorArc(im.arc.theCircle, im.arc.endpoint1, im.point);
sum = new Addition(majorArc, a2);
}
else if (Arc.BetweenMinor(im.arc.endpoint1, a2))
{
MajorArc majorArc = new MajorArc(im.arc.theCircle, im.point, im.arc.endpoint2);
sum = new Addition(a1, majorArc);
}
}
if (sum == null)
{
sum = new Addition(a1, a2);
}
GeometricArcEquation eq = new GeometricArcEquation(sum, im.arc);
eq.MakeAxiomatic();
// For hypergraph
List <GroundedClause> antecedent = Utilities.MakeList <GroundedClause>(im);
newGrounded.Add(new EdgeAggregator(antecedent, eq, annotation));
return(newGrounded);
}
