//
// Acquires all of the applicable congruent segments; then checks HL
//
private static List <EdgeAggregator> CollectAndCheckHL(RightTriangle rt1, RightTriangle rt2,
CongruentSegments css1, CongruentSegments css2,
GroundedClause original1, GroundedClause original2)
{
List <EdgeAggregator> newGrounded = new List <EdgeAggregator>();
// The Congruence pairs must relate the two triangles
if (!css1.LinksTriangles(rt1, rt2) || !css2.LinksTriangles(rt1, rt2))
{
return(newGrounded);
}
// One of the congruence pairs must relate the hypotenuses
Segment hypotenuse1 = rt1.OtherSide(rt1.rightAngle);
Segment hypotenuse2 = rt2.OtherSide(rt2.rightAngle);
// Determine the specific congruence pair that relates the hypotenuses
CongruentSegments hypotenuseCongruence = null;
CongruentSegments nonHypotenuseCongruence = null;
if (css1.HasSegment(hypotenuse1) && css1.HasSegment(hypotenuse2))
{
hypotenuseCongruence = css1;
nonHypotenuseCongruence = css2;
}
else if (css2.HasSegment(hypotenuse1) && css2.HasSegment(hypotenuse2))
{
hypotenuseCongruence = css2;
nonHypotenuseCongruence = css1;
}
else
{
return(newGrounded);
}
// Sanity check that the non hypotenuse congruence pair does not contain hypotenuse
if (nonHypotenuseCongruence.HasSegment(hypotenuse1) || nonHypotenuseCongruence.HasSegment(hypotenuse2))
{
return(newGrounded);
}
//
// We now have a hypotenuse leg situation; acquire the point-to-point congruence mapping
//
List <Point> triangleOne = new List <Point>();
List <Point> triangleTwo = new List <Point>();
// Right angle vertices correspond
triangleOne.Add(rt1.rightAngle.GetVertex());
triangleTwo.Add(rt2.rightAngle.GetVertex());
Point nonRightVertexRt1 = rt1.GetSegment(nonHypotenuseCongruence).SharedVertex(hypotenuse1);
Point nonRightVertexRt2 = rt2.GetSegment(nonHypotenuseCongruence).SharedVertex(hypotenuse2);
triangleOne.Add(nonRightVertexRt1);
triangleTwo.Add(nonRightVertexRt2);
triangleOne.Add(hypotenuse1.OtherPoint(nonRightVertexRt1));
triangleTwo.Add(hypotenuse2.OtherPoint(nonRightVertexRt2));
//
// Construct the new deduced relationships
//
GeometricCongruentTriangles ccts = new GeometricCongruentTriangles(new Triangle(triangleOne),
new Triangle(triangleTwo));
// Hypergraph
List <GroundedClause> antecedent = new List <GroundedClause>();
antecedent.Add(original1);
antecedent.Add(original2);
antecedent.Add(css1);
antecedent.Add(css2);
newGrounded.Add(new EdgeAggregator(antecedent, ccts, annotation));
// Add all the corresponding parts as new congruent clauses
newGrounded.AddRange(CongruentTriangles.GenerateCPCTC(ccts, triangleOne, triangleTwo));
return(newGrounded);
}