private static List<EdgeAggregator> InstantiateFromAltitude(GroundedClause clause)
{
List<EdgeAggregator> newGrounded = new List<EdgeAggregator>();
if (clause is Intersection)
{
Intersection inter = clause as Intersection;
// We are only interested in straight-angle type intersections
if (inter.StandsOnEndpoint()) return newGrounded;
if (!inter.IsPerpendicular()) return newGrounded;
foreach (Altitude altitude in candidateAltitude)
{
newGrounded.AddRange(InstantiateFromAltitude(inter, altitude));
}
candidateIntersection.Add(inter);
}
else if (clause is Altitude)
{
Altitude altitude = clause as Altitude;
foreach (Intersection inter in candidateIntersection)
{
newGrounded.AddRange(InstantiateFromAltitude(inter, altitude));
}
candidateAltitude.Add(altitude);
}
return newGrounded;
}
public static void Instantiate(GroundedClause clause)
{
annotation.active = EngineUIBridge.JustificationSwitch.RIGHT_TRIANGLE_DEFINITION;
List<EdgeAggregator> newGrounded = new List<EdgeAggregator>();
//
// Instantiating FROM a right triangle
//
Strengthened streng = clause as Strengthened;
if (streng == null) return;
if (streng.strengthened is RightTriangle)
{
candidateRight.Add(streng);
foreach (Strengthened iso in candidateIsosceles)
{
InstantiateRightTriangle(streng, iso);
}
}
else if (streng.strengthened is IsoscelesTriangle)
{
candidateIsosceles.Add(streng);
foreach (Strengthened right in candidateRight)
{
InstantiateRightTriangle(right, streng);
}
}
}
//
// This implements forward and Backward instantiation
//
public static List<EdgeAggregator> Instantiate(GroundedClause clause)
{
annotation.active = EngineUIBridge.JustificationSwitch.PERPENDICULAR_DEFINITION;
// FROM Perpendicular
if (clause is Perpendicular) return InstantiateFromPerpendicular(clause, clause as Perpendicular);
// TO Perpendicular
if (clause is RightAngle || clause is Intersection) return InstantiateToPerpendicular(clause);
// Handle Strengthening; may be a Perpendicular (FROM) or Right Angle (TO)
Strengthened streng = clause as Strengthened;
if (streng != null)
{
if (streng.strengthened is Perpendicular && !(streng.strengthened is PerpendicularBisector))
{
return InstantiateFromPerpendicular(clause, streng.strengthened as Perpendicular);
}
else if (streng.strengthened is RightAngle)
{
return InstantiateToPerpendicular(clause);
}
}
return new List<EdgeAggregator>();
}
public static List<EdgeAggregator> InstantiateToPerpendicular(GroundedClause clause)
{
List<EdgeAggregator> newGrounded = new List<EdgeAggregator>();
if (clause is Intersection)
{
// Since we receive intersections right away in the instantiation process, just store the intersections
candidateIntersections.Add(clause as Intersection);
}
else if (clause is RightAngle)
{
RightAngle ra = clause as RightAngle;
foreach (Intersection inter in candidateIntersections)
{
newGrounded.AddRange(InstantiateToPerpendicular(inter, ra, clause));
}
}
else if (clause is Strengthened)
{
Strengthened streng = clause as Strengthened;
// Only intrerested in right angles
if (!(streng.strengthened is RightAngle)) return newGrounded;
foreach (Intersection inter in candidateIntersections)
{
newGrounded.AddRange(InstantiateToPerpendicular(inter, streng.strengthened as RightAngle, clause));
}
}
return newGrounded;
}
public static List <GenericInstantiator.EdgeAggregator> Instantiate(GroundedClause gc)
{
List <GenericInstantiator.EdgeAggregator> newGrounded = new List <GenericInstantiator.EdgeAggregator>();
Segment segment = gc as Segment;
if (segment == null)
{
return(newGrounded);
}
// Only generate reflexive if this segment is shared
if (!segment.isShared())
{
return(newGrounded);
}
GeometricCongruentSegments ccss = new GeometricCongruentSegments(segment, segment);
ccss.MakeIntrinsic(); // This is an 'obvious' notion so it should be intrinsic to any figure
List <GroundedClause> antecedent = Utilities.MakeList <GroundedClause>(segment);
newGrounded.Add(new GenericInstantiator.EdgeAggregator(antecedent, ccss, reflexAnnotation));
return(newGrounded);
}
//
// Supplementary(Angle(A, B, D), Angle(B, A, C))
// Congruent(Angle(A, B, D), Angle(B, A, C)) -> RightAngle(Angle(A, B, D))
// -> RightAngle(Angle(B, A, C))
//
// C D
// | |
// |____________|
// A B
//
public static List<EdgeAggregator> Instantiate(GroundedClause c)
{
annotation.active = EngineUIBridge.JustificationSwitch.CONGRUENT_SUPPLEMENTARY_ANGLES_IMPLY_RIGHT_ANGLES;
// The list of new grounded clauses if they are deduced
List<EdgeAggregator> newGrounded = new List<EdgeAggregator>();
if (c is CongruentAngles)
{
CongruentAngles conAngles = c as CongruentAngles;
// We are interested in adjacent angles, not reflexive
if (conAngles.IsReflexive()) return newGrounded;
foreach (Supplementary suppAngles in candSupplementary)
{
newGrounded.AddRange(CheckAndGenerateSupplementaryCongruentImplyRightAngles(suppAngles, conAngles));
}
candCongruent.Add(conAngles);
}
else if (c is Supplementary)
{
Supplementary supplementary = c as Supplementary;
foreach (CongruentAngles cc in candCongruent)
{
newGrounded.AddRange(CheckAndGenerateSupplementaryCongruentImplyRightAngles(supplementary, cc));
}
candSupplementary.Add(supplementary);
}
return newGrounded;
}
//
// Implements transitivity with Relations (Parallel, Similar)
// Relation(A, B), Relation(B, C) -> Relation(A, C)
//
// Generation of new relations is restricted to the following rules; let G be Geometric and A algebriac
// G + G -> A
// G + A -> A
// A + A -X> A <- Not allowed
//
public static List<EdgeAggregator> Instantiate(GroundedClause clause)
{
List<EdgeAggregator> newGrounded = new List<EdgeAggregator>();
// Do we have appropriate clauses?
if (!(clause is Parallel) && !(clause is SimilarTriangles)) return newGrounded;
// Has this clause been generated before?
// Since generated clauses will eventually be instantiated as well, this will reach a fixed point and stop.
// Uniqueness of clauses needs to be handled by the class calling this
if (ClauseHasBeenDeduced(clause)) return newGrounded;
// A reflexive expression provides no information of interest or consequence.
if (clause.IsReflexive()) return newGrounded;
//
// Process the clause
//
if (clause is Parallel)
{
newGrounded.AddRange(HandleNewParallelRelation(clause as Parallel));
}
else if (clause is SimilarTriangles)
{
newGrounded.AddRange(HandleNewSimilarTrianglesRelation(clause as SimilarTriangles));
}
// Add the new clause to the right list for later combining
AddToAppropriateList(clause);
return newGrounded;
}
public static List<EdgeAggregator> Instantiate(GroundedClause clause)
{
annotation.active = EngineUIBridge.JustificationSwitch.CORRESPONDING_ANGLES_OF_PARALLEL_LINES;
List<EdgeAggregator> newGrounded = new List<EdgeAggregator>();
if (clause is Parallel)
{
Parallel parallel = clause as Parallel;
for (int i = 0; i < candidateIntersection.Count; i++)
{
for (int j = i + 1; j < candidateIntersection.Count; j++)
{
newGrounded.AddRange(InstantiateIntersection(parallel, candidateIntersection[i], candidateIntersection[j]));
}
}
candidateParallel.Add(parallel);
}
else if (clause is Intersection)
{
Intersection newInter = clause as Intersection;
foreach (Intersection oldInter in candidateIntersection)
{
foreach (Parallel parallel in candidateParallel)
{
newGrounded.AddRange(InstantiateIntersection(parallel, newInter, oldInter));
}
}
candidateIntersection.Add(newInter);
}
return newGrounded;
}
//
// A \ / B
// \ /
// \ /
// O \/ X
// /\
// / \
// C / \ D
//
// Intersection(Segment(AD), Segment(BC)) -> 2 * Angle(CXA) = Arc(A, C) + Arc(B, D),
// 2 * Angle(BXD) = Arc(A, C) + Arc(B, D),
// 2 * Angle(AXB) = Arc(A, B) + Arc(C, D),
// 2 * Angle(CXD) = Arc(A, B) + Arc(C, D)
//
public static List<EdgeAggregator> Instantiate(GroundedClause clause)
{
annotation.active = EngineUIBridge.JustificationSwitch.TWO_INTERSECTING_CHORDS_ANGLE_MEASURE_HALF_SUM_INTERCEPTED_ARCS;
List<EdgeAggregator> newGrounded = new List<EdgeAggregator>();
if (clause is Intersection)
{
Intersection newInter = clause as Intersection;
foreach (Circle circle in candidateCircle)
{
newGrounded.AddRange(InstantiateTheorem(newInter, circle));
}
candidateIntersection.Add(newInter);
}
else if (clause is Circle)
{
Circle circle = clause as Circle;
foreach (Intersection oldInter in candidateIntersection)
{
newGrounded.AddRange(InstantiateTheorem(oldInter, circle));
}
candidateCircle.Add(circle);
}
return newGrounded;
}
public override bool CanBeStrengthenedTo(GroundedClause gc)
{
Midpoint midpoint = gc as Midpoint;
if (midpoint == null) return false;
return this.point.StructurallyEquals(midpoint.point) && this.segment.StructurallyEquals(midpoint.segment);
}
// B ---------V---------A
// \
// \
// \
// C
//
// Median(Segment(V, C), Triangle(C, A, B)) -> Midpoint(V, Segment(B, A))
//
private static List<EdgeAggregator> InstantiateFromMedian(GroundedClause clause)
{
List<EdgeAggregator> newGrounded = new List<EdgeAggregator>();
if (clause is InMiddle && !(clause is Midpoint))
{
InMiddle im = clause as InMiddle;
foreach (Median median in candidateMedian)
{
newGrounded.AddRange(InstantiateFromMedian(im, median));
}
candidateInMiddle.Add(im);
}
else if (clause is Median)
{
Median median = clause as Median;
foreach (InMiddle im in candidateInMiddle)
{
newGrounded.AddRange(InstantiateFromMedian(im, median));
}
candidateMedian.Add(median);
}
return newGrounded;
}
public override bool CanBeStrengthenedTo(GroundedClause gc)
{
Perpendicular perp = gc as Perpendicular;
if (perp == null) return false;
return intersect.Equals(perp.intersect) && ((lhs.StructurallyEquals(perp.lhs) && rhs.StructurallyEquals(perp.rhs)) ||
(lhs.StructurallyEquals(perp.rhs) && rhs.StructurallyEquals(perp.lhs)));
}
public override bool ContainsClause(GroundedClause clause)
{
NumericValue clauseValue = clause as NumericValue;
if (clauseValue == null) return false;
return Utilities.CompareValues(value, clauseValue.value);
}
public static List<EdgeAggregator> Instantiate(GroundedClause clause)
{
annotation.active = EngineUIBridge.JustificationSwitch.TWO_INTERCEPTED_ARCS_HAVE_CONGRUENT_ANGLES;
List<EdgeAggregator> newGrounded = new List<EdgeAggregator>();
if (clause is Angle)
{
Angle angle = clause as Angle;
foreach (Angle candCongruentAngle in candidateAngles)
{
newGrounded.AddRange(InstantiateTheorem(angle, candCongruentAngle));
}
candidateAngles.Add(angle);
}
else if (clause is Circle)
{
Circle circle = clause as Circle;
for (int i = 0; i < candidateAngles.Count; ++i)
{
for (int j = i + 1; j < candidateAngles.Count; ++j)
{
newGrounded.AddRange(InstantiateTheorem(candidateAngles[i], candidateAngles[j]));
}
}
}
return newGrounded;
}
public static List <GenericInstantiator.EdgeAggregator> Instantiate(GroundedClause clause)
{
List <GenericInstantiator.EdgeAggregator> newGrounded = new List <GenericInstantiator.EdgeAggregator>();
if (!(clause is AngleEquation))
{
return(newGrounded);
}
Equation original = clause as Equation;
Equation copyEq = (Equation)original.DeepCopy();
FlatEquation flattened = new FlatEquation(copyEq.lhs.CollectTerms(), copyEq.rhs.CollectTerms());
if (flattened.lhsExps.Count == 1 && flattened.rhsExps.Count == 1)
{
KeyValuePair <int, int> ratio = Utilities.RationalRatio(flattened.lhsExps[0].multiplier, flattened.rhsExps[0].multiplier);
if (ratio.Key != -1)
{
if (ratio.Key <= 2 && ratio.Value <= 2)
{
AlgebraicProportionalAngles prop = new AlgebraicProportionalAngles((Angle)flattened.lhsExps[0].DeepCopy(),
(Angle)flattened.rhsExps[0].DeepCopy());
List <GroundedClause> antecedent = Utilities.MakeList <GroundedClause>(original);
newGrounded.Add(new GenericInstantiator.EdgeAggregator(antecedent, prop, atomAnnotation));
}
}
}
return(newGrounded);
}
//
// EquilateralTriangle(A, B, C) -> Equation(m \angle ABC = 60),
// Equation(m \angle BCA = 60),
// Equation(m \angle CAB = 60)
//
public static List<EdgeAggregator> Instantiate(GroundedClause c)
{
annotation.active = EngineUIBridge.JustificationSwitch.EQUILATERAL_TRIANGLE_HAS_SIXTY_DEGREE_ANGLES;
List<EdgeAggregator> newGrounded = new List<EdgeAggregator>();
if (!(c is EquilateralTriangle) && !(c is Strengthened)) return newGrounded;
EquilateralTriangle eqTri = c as EquilateralTriangle;
if (c is Strengthened)
{
eqTri = (c as Strengthened).strengthened as EquilateralTriangle;
}
if (eqTri == null) return newGrounded;
// EquilateralTriangle(A, B, C) ->
List<GroundedClause> antecedent = Utilities.MakeList<GroundedClause>(c);
// -> Equation(m \angle ABC = 60),
// Equation(m \angle BCA = 60),
// Equation(m \angle CAB = 60)
GeometricAngleEquation eq1 = new GeometricAngleEquation(eqTri.AngleA, new NumericValue(60));
GeometricAngleEquation eq2 = new GeometricAngleEquation(eqTri.AngleB, new NumericValue(60));
GeometricAngleEquation eq3 = new GeometricAngleEquation(eqTri.AngleC, new NumericValue(60));
newGrounded.Add(new EdgeAggregator(antecedent, eq1, annotation));
newGrounded.Add(new EdgeAggregator(antecedent, eq2, annotation));
newGrounded.Add(new EdgeAggregator(antecedent, eq3, annotation));
return newGrounded;
}
private static List<EdgeAggregator> InstantiateToTheorem(Rhombus rhombus, GroundedClause original)
{
List<EdgeAggregator> newGrounded = new List<EdgeAggregator>();
// For hypergraph
List<GroundedClause> antecedent = Utilities.MakeList<GroundedClause>(original);
// Instantiate this rhombus diagonals ONLY if the original figure has the diagonals drawn.
if (rhombus.TopLeftDiagonalIsValid())
{
AngleBisector ab1 = new AngleBisector(rhombus.topLeftAngle, rhombus.topLeftBottomRightDiagonal);
AngleBisector ab2 = new AngleBisector(rhombus.bottomRightAngle, rhombus.topLeftBottomRightDiagonal);
newGrounded.Add(new EdgeAggregator(antecedent, ab1, annotation));
newGrounded.Add(new EdgeAggregator(antecedent, ab2, annotation));
}
if (rhombus.BottomRightDiagonalIsValid())
{
AngleBisector ab1 = new AngleBisector(rhombus.topRightAngle, rhombus.bottomLeftTopRightDiagonal);
AngleBisector ab2 = new AngleBisector(rhombus.bottomLeftAngle, rhombus.bottomLeftTopRightDiagonal);
newGrounded.Add(new EdgeAggregator(antecedent, ab1, annotation));
newGrounded.Add(new EdgeAggregator(antecedent, ab2, annotation));
}
return newGrounded;
}
//
// In an attempt to avoid issues, all terms collected are copies of the originals.
//
public override List <GroundedClause> CollectTerms()
{
List <GroundedClause> list = new List <GroundedClause>();
if (leftExp is NumericValue && rightExp is NumericValue)
{
list.Add(new NumericValue((leftExp as NumericValue).DoubleValue * (rightExp as NumericValue).DoubleValue));
return(list);
}
if (leftExp is NumericValue)
{
foreach (GroundedClause gc in rightExp.CollectTerms())
{
GroundedClause copyGC = gc.DeepCopy();
copyGC.multiplier *= ((NumericValue)leftExp).IntValue;
list.Add(copyGC);
}
}
if (rightExp is NumericValue)
{
foreach (GroundedClause gc in leftExp.CollectTerms())
{
GroundedClause copyGC = gc.DeepCopy();
copyGC.multiplier *= ((NumericValue)rightExp).IntValue;
list.Add(copyGC);
}
}
return(list);
}
// B ____________________ C
// / /
// / /
// / Circle (center) /
// / O /
// / /
// A /___________________/ D
//
// Circle(O), Quad(A, B, C, D) -> Supplementary(Angle(ABC), Angle(ADC)), Supplementary(Angle(BAD), Angle(BCD))
//
public static List<EdgeAggregator> Instantiate(GroundedClause clause)
{
annotation.active = EngineUIBridge.JustificationSwitch.INSCRIBED_QUADRILATERAL_OPPOSITE_ANGLES_SUPPLEMENTARY;
List<EdgeAggregator> newGrounded = new List<EdgeAggregator>();
Circle circle = clause as Circle;
if (circle == null) return newGrounded;
//
// For each inscribed quadrilateral, generate accordingly.
//
foreach (Quadrilateral quad in circle.inscribedPolys[Polygon.QUADRILATERAL_INDEX])
{
Supplementary supp1 = new Supplementary(quad.topLeftAngle, quad.bottomRightAngle);
Supplementary supp2 = new Supplementary(quad.bottomLeftAngle, quad.topRightAngle);
// For hypergraph
List<GroundedClause> antecedent = new List<GroundedClause>();
antecedent.Add(circle);
antecedent.Add(quad);
newGrounded.Add(new EdgeAggregator(antecedent, supp1, annotation));
newGrounded.Add(new EdgeAggregator(antecedent, supp2, annotation));
}
return newGrounded;
}
//
// In order for two triangles to be congruent, we require the following:
// RightTriangle(A, B, C) -> Complementary(Angle(B, A, C), Angle(A, C, B))
// A
// | \
// | \
// | \
// | \
// |_____\
// B C
//
public static List<EdgeAggregator> Instantiate(GroundedClause c)
{
annotation.active = EngineUIBridge.JustificationSwitch.ACUTE_ANGLES_IN_RIGHT_TRIANGLE_ARE_COMPLEMENTARY;
List<EdgeAggregator> newGrounded = new List<EdgeAggregator>();
if (!(c is Triangle) && !(c is Strengthened)) return newGrounded;
if (c is Triangle)
{
Triangle tri = c as Triangle;
if (!(tri is RightTriangle))
{
if (!tri.provenRight) return newGrounded;
}
newGrounded.AddRange(InstantiateRightTriangle(tri, c));
}
if (c is Strengthened)
{
Strengthened streng = c as Strengthened;
if (!(streng.strengthened is RightTriangle)) return newGrounded;
newGrounded.AddRange(InstantiateRightTriangle(streng.strengthened as RightTriangle, c));
}
return newGrounded;
}
// / A
// / |)
// / | )
// / | )
// Q------- O---X---) D
// \ | )
// \ | )
// \ |)
// \ C
//
// Inscribed Angle(AQC) -> Angle(AQC) = 2 * Arc(AC)
//
public static List<EdgeAggregator> Instantiate(GroundedClause clause)
{
annotation.active = EngineUIBridge.JustificationSwitch.MEASURE_INSCRIBED_ANGLE_EQUAL_HALF_INTERCEPTED_ARC;
List<EdgeAggregator> newGrounded = new List<EdgeAggregator>();
if (clause is Angle)
{
Angle angle = clause as Angle;
foreach (Circle circle in candidateCircles)
{
newGrounded.AddRange(InstantiateTheorem(circle, angle));
}
candidateAngles.Add(angle);
}
else if (clause is Circle)
{
Circle circle = clause as Circle;
foreach (Angle angle in candidateAngles)
{
newGrounded.AddRange(InstantiateTheorem(circle, angle));
}
candidateCircles.Add(circle);
}
return newGrounded;
}
//
// AngleBisector(SegmentA, D), Angle(C, A, B)) -> 2 m\angle CAD = m \angle CAB,
// 2 m\angle BAD = m \angle CAB
//
// A ________________________B
// |\
// | \
// | \
// | \
// | \
// C D
//
public static List<EdgeAggregator> Instantiate(GroundedClause c)
{
annotation.active = EngineUIBridge.JustificationSwitch.ANGLE_BISECTOR_THEOREM;
List<EdgeAggregator> newGrounded = new List<EdgeAggregator>();
if (!(c is AngleBisector)) return newGrounded;
AngleBisector angleBisector = c as AngleBisector;
KeyValuePair<Angle, Angle> adjacentAngles = angleBisector.GetBisectedAngles();
// Construct 2 m\angle CAD
Multiplication product1 = new Multiplication(new NumericValue(2), adjacentAngles.Key);
// Construct 2 m\angle BAD
Multiplication product2 = new Multiplication(new NumericValue(2), adjacentAngles.Value);
// 2X = AB
GeometricAngleEquation newEq1 = new GeometricAngleEquation(product1, angleBisector.angle);
GeometricAngleEquation newEq2 = new GeometricAngleEquation(product2, angleBisector.angle);
// For hypergraph
List<GroundedClause> antecedent = Utilities.MakeList<GroundedClause>(angleBisector);
newGrounded.Add(new EdgeAggregator(antecedent, newEq1, annotation));
newGrounded.Add(new EdgeAggregator(antecedent, newEq2, annotation));
return newGrounded;
}
public static List<EdgeAggregator> InstantiateTheorem(GroundedClause original, IsoscelesTriangle isoTri)
{
GeometricCongruentAngles newCongSegs = new GeometricCongruentAngles(isoTri.baseAngleOppositeLeg1, isoTri.baseAngleOppositeLeg2);
List<GroundedClause> antecedent = Utilities.MakeList<GroundedClause>(original);
return Utilities.MakeList<EdgeAggregator>(new EdgeAggregator(antecedent, newCongSegs, annotation));
}
public void AddGeneralPredecessor(GroundedClause gc)
{
if (gc.clauseId == -1)
{
Debug.WriteLine("ERROR: id is -1: " + gc.ToString());
}
Utilities.AddUnique(generalPredecessors, gc.clauseId);
}
public static void Record(GroundedClause clause)
{
// Record uniquely? For right angles, etc?
if (clause is Quadrilateral)
{
figureQuadrilaterals.Add(clause as Quadrilateral);
}
}
public static void Record(GroundedClause clause)
{
// Record uniquely? For right angles, etc?
if (clause is Point)
{
figurePoints.Add(clause as Point);
}
}
//
// Given a list of grounded clauses, get the structurally unique.
//
public GroundedClause Get(GroundedClause clause)
{
if (clause is GeometryTutorLib.ConcreteAST.Point)
{
return GeometryTutorLib.Utilities.GetStructurally<GeometryTutorLib.ConcreteAST.Point>(implied.points, clause as GeometryTutorLib.ConcreteAST.Point);
}
else if (clause is GeometryTutorLib.ConcreteAST.Segment)
{
return GeometryTutorLib.Utilities.GetStructurally<GeometryTutorLib.ConcreteAST.Segment>(implied.segments, clause as GeometryTutorLib.ConcreteAST.Segment);
}
else if (clause is Intersection)
{
return GeometryTutorLib.Utilities.GetStructurally<Intersection>(implied.ssIntersections, clause as Intersection);
}
else if (clause is CircleCircleIntersection)
{
return GeometryTutorLib.Utilities.GetStructurally<CircleCircleIntersection>(implied.ccIntersections, clause as CircleCircleIntersection);
}
else if (clause is CircleSegmentIntersection)
{
return GeometryTutorLib.Utilities.GetStructurally<CircleSegmentIntersection>(implied.csIntersections, clause as CircleSegmentIntersection);
}
else if (clause is Angle)
{
return GeometryTutorLib.Utilities.GetStructurally<Angle>(implied.angles, clause as Angle);
}
else if (clause is InMiddle)
{
return GeometryTutorLib.Utilities.GetStructurally<InMiddle>(implied.inMiddles, clause as InMiddle);
}
else if (clause is MinorArc)
{
return GeometryTutorLib.Utilities.GetStructurally<MinorArc>(implied.minorArcs, clause as MinorArc);
}
else if (clause is Semicircle)
{
return GeometryTutorLib.Utilities.GetStructurally<Semicircle>(implied.semiCircles, clause as Semicircle);
}
else if (clause is MajorArc)
{
return GeometryTutorLib.Utilities.GetStructurally<MajorArc>(implied.majorArcs, clause as MajorArc);
}
else if (clause is ArcInMiddle)
{
return GeometryTutorLib.Utilities.GetStructurally<ArcInMiddle>(implied.arcInMiddle, clause as ArcInMiddle);
}
else if (clause is Triangle)
{
return GeometryTutorLib.Utilities.GetStructurally<GeometryTutorLib.ConcreteAST.Polygon>(implied.polygons[GeometryTutorLib.ConcreteAST.Polygon.TRIANGLE_INDEX], clause as GeometryTutorLib.ConcreteAST.Polygon);
}
else if (clause is Quadrilateral)
{
return GeometryTutorLib.Utilities.GetStructurally<GeometryTutorLib.ConcreteAST.Polygon>(implied.polygons[GeometryTutorLib.ConcreteAST.Polygon.QUADRILATERAL_INDEX], clause as GeometryTutorLib.ConcreteAST.Polygon);
}
return null;
}
// A D
// /\ / \
// / \ / \
// / \ / \
// /______\ /_______\
// B C E F
//
// In order for two triangles to be congruent, we require the following:
// Triangle(A, B, C), Triangle(D, E, F),
// Congruent(Segment(A, B), Segment(D, E)),
// Congruent(Segment(A, C), Angle(D, F)),
// Congruent(Segment(B, C), Segment(E, F)) -> Congruent(Triangle(A, B, C), Triangle(D, E, F)),
// Congruent(Angle(A, B, C), Angle(D, E, F)),
// Congruent(Angle(C, A, B), Angle(F, D, E)),
// Congruent(Angle(B, C, A), Angle(E, F, D)),
//
public static List<EdgeAggregator> Instantiate(GroundedClause clause)
{
annotation.active = EngineUIBridge.JustificationSwitch.SSS;
// The list of new grounded clauses if they are deduced
List<EdgeAggregator> newGrounded = new List<EdgeAggregator>();
if (clause is CongruentSegments)
{
CongruentSegments newCss = clause as CongruentSegments;
// Check all combinations of triangles to see if they are congruent
// This congruence must include the new segment congruence
for (int i = 0; i < candidateTriangles.Count - 1; i++)
{
for (int j = i + 1; j < candidateTriangles.Count; j++)
{
for (int m = 0; m < candidateSegments.Count - 1; m++)
{
for (int n = m + 1; n < candidateSegments.Count; n++)
{
newGrounded.AddRange(InstantiateSSS(candidateTriangles[i], candidateTriangles[j], candidateSegments[m], candidateSegments[n], newCss));
}
}
}
}
// Add this segment to the list of possible clauses to unify later
candidateSegments.Add(newCss);
}
// If this is a new triangle, check for triangles which may be congruent to this new triangle
else if (clause is Triangle)
{
Triangle newTriangle = clause as Triangle;
// Check all combinations of triangles to see if they are congruent
// This congruence must include the new segment congruence
foreach (Triangle oldTri in candidateTriangles)
{
for (int m = 0; m < candidateSegments.Count - 1; m++)
{
for (int n = m + 1; n < candidateSegments.Count - 1; n++)
{
for (int p = n + 1; p < candidateSegments.Count - 2; p++)
{
newGrounded.AddRange(InstantiateSSS(newTriangle, oldTri, candidateSegments[m], candidateSegments[n], candidateSegments[p]));
}
}
}
}
candidateTriangles.Add(newTriangle);
}
return newGrounded;
}
public override bool Equals(object obj)
{
GroundedClause that = obj as GroundedClause;
if (that == null)
{
return(false);
}
return(multiplier == that.multiplier); // && clauseId == that.clauseId;
}
//
// Midpoint(M, Segment(A, B)) -> 2AM = AB, 2BM = AB A ------------- M ------------- B
//
public static List<EdgeAggregator> Instantiate(GroundedClause clause)
{
annotation.active = EngineUIBridge.JustificationSwitch.MIDPOINT_THEOREM;
if (clause is Midpoint) return InstantiateMidpointTheorem(clause, clause as Midpoint);
if ((clause as Strengthened).strengthened is Midpoint) return InstantiateMidpointTheorem(clause, (clause as Strengthened).strengthened as Midpoint);
return new List<EdgeAggregator>();
}
public AngleArcEquation(GroundedClause l, GroundedClause r) : base(l, r)
{
double sumL = SumSide(l.CollectTerms());
double sumR = SumSide(r.CollectTerms());
if (!Utilities.CompareValues(sumL, sumR))
{
throw new ArgumentException("Angle-Arc equation is inaccurate; sums differ: " + l + " " + r);
}
}
//
// This implements forward and Backward instantiation
//
public static List<EdgeAggregator> Instantiate(GroundedClause clause)
{
annotation.active = EngineUIBridge.JustificationSwitch.SEGMENT_BISECTOR_DEFINITION;
if (clause is SegmentBisector || clause is Strengthened || clause is InMiddle) return InstantiateFromSegmentBisector(clause);
if (clause is Intersection || clause is CongruentSegments) return InstantiateToSegmentBisector(clause);
return new List<EdgeAggregator>();
}
//
// This implements forward and Backward instantiation
// Forward is Midpoint -> Congruent Clause
// Backward is Congruent -> Midpoint Clause
//
public static List<EdgeAggregator> Instantiate(GroundedClause c)
{
annotation.active = EngineUIBridge.JustificationSwitch.ANGLE_BISECTOR_DEFINITION;
if (c is AngleBisector) return InstantiateBisector(c as AngleBisector);
if (c is CongruentAngles || c is Segment) return InstantiateCongruent(c);
return new List<EdgeAggregator>();
}
public AngleEquation(GroundedClause l, GroundedClause r)
: base(l, r)
{
double sumL = SumSide(l.CollectTerms());
double sumR = SumSide(r.CollectTerms());
if (!Utilities.CompareValues(sumL, sumR))
{
throw new ArgumentException("Angle equation is inaccurate; sums differ: " + l + " " + r);
}
}
public override bool ContainsClause(GroundedClause clause)
{
NumericValue clauseValue = clause as NumericValue;
if (clauseValue == null)
{
return(false);
}
return(Utilities.CompareValues(value, clauseValue.value));
}
//
// This implements forward and Backward instantiation
//
public static List<EdgeAggregator> Instantiate(GroundedClause clause)
{
if (clause is Complementary) return InstantiateFromComplementary(clause as Complementary);
if (clause is RightAngle || clause is Strengthened || clause is AngleEquation)
{
return InstantiateToComplementary(clause);
}
return new List<EdgeAggregator>();
}
public override bool CanBeStrengthenedTo(GroundedClause gc)
{
Perpendicular perp = gc as Perpendicular;
if (perp == null)
{
return(false);
}
return(intersect.Equals(perp.intersect) && ((lhs.StructurallyEquals(perp.lhs) && rhs.StructurallyEquals(perp.rhs)) ||
(lhs.StructurallyEquals(perp.rhs) && rhs.StructurallyEquals(perp.lhs))));
}
public override bool CanBeStrengthenedTo(GroundedClause gc)
{
Midpoint midpoint = gc as Midpoint;
if (midpoint == null)
{
return(false);
}
return(this.point.StructurallyEquals(midpoint.point) && this.segment.StructurallyEquals(midpoint.segment));
}
public override bool CanBeStrengthenedTo(GroundedClause gc)
{
RightAngle ra = gc as RightAngle;
if (ra == null)
{
return(false);
}
return(this.StructurallyEquals(ra));
}
//
// Generate Proportional relationships only if those proportions may be used by a figure (in this case, only triangles)
//
// Triangle(A, B, C), Triangle(D, E, F),
//
// Congruent(Segment(A, B), Segment(B, C)), Congruent(Segment(D, E), Segment(E, F)) -> Similar(Triangle(A, B, C), Triangle(D, E, F)),
// Proportional(Segment(A, B), Segment(D, E)),
// Proportional(Segment(A, B), Segment(E, F)),
// Proportional(Segment(B, C), Segment(D, E)),
// Proportional(Segment(B, C), Segment(E, F)),
//
public static List<EdgeAggregator> Instantiate(GroundedClause c)
{
annotation.active = EngineUIBridge.JustificationSwitch.CONGRUENT_SEGMENTS_IMPLY_PROPORTIONAL_SEGMENTS_DEFINITION;
// The list of new grounded clauses if they are deduced
List<EdgeAggregator> newGrounded = new List<EdgeAggregator>();
if (!(c is Triangle) && !(c is CongruentSegments)) return newGrounded;
// If this is a new triangle, check for triangles which may be Similar to this new triangle
if (c is Triangle)
{
Triangle candidateTri = c as Triangle;
foreach (Triangle oldTriangle in candidateTriangles)
{
for (int m = 0; m < candidateCongruentSegments.Count - 1; m++)
{
for (int n = m + 1; n < candidateCongruentSegments.Count; n++)
{
newGrounded.AddRange(IfCongruencesApplyToTrianglesGenerate(candidateTri, oldTriangle, candidateCongruentSegments[m], candidateCongruentSegments[n]));
}
}
}
// Add this triangle to the list of possible clauses to unify later
candidateTriangles.Add(candidateTri);
}
//
// Two sets of congruent segments can lead to proportionality
//
else if (c is CongruentSegments)
{
CongruentSegments newCss = c as CongruentSegments;
// Avoid reflexive relationships since they will not lead to interesting proportional relationships
if (newCss.IsReflexive()) return newGrounded;
for (int i = 0; i < candidateTriangles.Count - 1; i++)
{
for (int j = i + 1; j < candidateTriangles.Count; j++)
{
foreach (CongruentSegments css in candidateCongruentSegments)
{
newGrounded.AddRange(IfCongruencesApplyToTrianglesGenerate(candidateTriangles[i], candidateTriangles[j], css, newCss));
}
}
}
candidateCongruentSegments.Add(newCss);
}
return newGrounded;
}
public static List<EdgeAggregator> Instantiate(GroundedClause clause)
{
annotation.active = EngineUIBridge.JustificationSwitch.CIRCLE_DEFINITION;
if (clause is Circle)
{
return InstantiateFromDefinition(clause as Circle);
}
return new List<EdgeAggregator>();
}
//
// This implements forward and Backward instantiation
//
public static List<EdgeAggregator> Instantiate(GroundedClause clause)
{
annotation.active = EngineUIBridge.JustificationSwitch.MEDIAN_DEFINITION;
List<EdgeAggregator> newGrounded = new List<EdgeAggregator>();
if (clause is Median || clause is InMiddle) newGrounded.AddRange(InstantiateFromMedian(clause));
if (clause is SegmentBisector || clause is Triangle || clause is Strengthened) newGrounded.AddRange(InstantiateToMedian(clause));
return newGrounded;
}
public SegmentEquation(GroundedClause l, GroundedClause r) : base(l, r)
{
double sumL = SumSide(l.CollectTerms());
double sumR = SumSide(r.CollectTerms());
//if (!Utilities.CompareValues(sumL, sumR))
//{
// throw new ArgumentException("Segment equation is inaccurate; sums differ: " + l + " = " + r);
//}
if (Utilities.CompareValues(sumL, 0) && Utilities.CompareValues(sumR, 0))
{
throw new ArgumentException("Should not have an equation that is 0 = 0: " + this.ToString());
}
}
public override List <GroundedClause> CollectTerms()
{
List <GroundedClause> list = new List <GroundedClause>();
list.AddRange(leftExp.CollectTerms());
foreach (GroundedClause gc in rightExp.CollectTerms())
{
GroundedClause copyGC = gc.DeepCopy();
list.Add(copyGC);
}
return(list);
}
public static void Record(GroundedClause clause)
{
if (clause is MinorArc)
{
figureMinorArcs.Add(clause as MinorArc);
}
if (clause is MajorArc)
{
figureMajorArcs.Add(clause as MajorArc);
}
if (clause is Semicircle)
{
figureSemicircles.Add(clause as Semicircle);
}
}
public static List <GenericInstantiator.EdgeAggregator> InstantiateProportion(GroundedClause clause)
{
List <GenericInstantiator.EdgeAggregator> newGrounded = new List <GenericInstantiator.EdgeAggregator>();
ProportionalAngles propAngs = clause as ProportionalAngles;
if (propAngs == null)
{
return(newGrounded);
}
// Do not generate equations based on 'forced' proportions
if (propAngs.proportion.Key == -1 || propAngs.proportion.Value == -1)
{
return(newGrounded);
}
// Create a product on the left hand side
Multiplication productLHS = new Multiplication(new NumericValue(propAngs.proportion.Key), propAngs.smallerAngle.DeepCopy());
// Create a product on the right hand side, if it applies.
GroundedClause rhs = propAngs.largerAngle.DeepCopy();
if (propAngs.proportion.Value > 1)
{
rhs = new Multiplication(new NumericValue(propAngs.proportion.Key), rhs);
}
//
// Create the equation
//
Equation newEquation = null;
if (propAngs is AlgebraicProportionalAngles)
{
newEquation = new AlgebraicAngleEquation(productLHS, rhs);
}
else if (propAngs is GeometricProportionalAngles)
{
newEquation = new GeometricAngleEquation(productLHS, rhs);
}
List <GroundedClause> antecedent = Utilities.MakeList <GroundedClause>(propAngs);
newGrounded.Add(new GenericInstantiator.EdgeAggregator(antecedent, newEquation, defAnnotation));
return(newGrounded);
}
//public Equation(GroundedClause l, GroundedClause r, string just) : base()
//{
// lhs = l;
// rhs = r;
// justification = just;
//}
public override void Substitute(GroundedClause toFind, GroundedClause toSub)
{
if (lhs.Equals(toFind))
{
lhs = toSub.DeepCopy();
}
else
{
lhs.Substitute(toFind, toSub);
}
if (rhs.Equals(toFind))
{
rhs = toSub.DeepCopy();
}
else
{
rhs.Substitute(toFind, toSub);
}
}
public override void Substitute(GroundedClause toFind, GroundedClause toSub)
{
if (leftExp.Equals(toFind))
{
leftExp = toSub;
}
else
{
leftExp.Substitute(toFind, toSub);
}
if (rightExp.Equals(toFind))
{
rightExp = toSub;
}
else
{
rightExp.Substitute(toFind, toSub);
}
}
public static List <GenericInstantiator.EdgeAggregator> Instantiate(GroundedClause pred, GroundedClause c)
{
List <GenericInstantiator.EdgeAggregator> newGrounded = new List <GenericInstantiator.EdgeAggregator>();
if (c is Angle)
{
return(newGrounded);
}
//Angle angle = c as Angle;
//if (IsSpecialAngle(angle.measure))
//{
// GeometricAngleEquation angEq = new GeometricAngleEquation(angle, new NumericValue((int)angle.measure), "Given:tbd");
// List<GroundedClause> antecedent = Utilities.MakeList<GroundedClause>(pred);
// newClauses.Add(new EdgeAggregator(antecedent, angEq));
//}
return(newGrounded);
}
//
// Generate all corresponding conngruent components.
// Ensure vertices correpsond appropriately.
//
public static List <GenericInstantiator.EdgeAggregator> Instantiate(GroundedClause clause)
{
List <GenericInstantiator.EdgeAggregator> newGrounded = new List <GenericInstantiator.EdgeAggregator>();
CongruentTriangles conTris = clause as CongruentTriangles;
if (conTris == null)
{
return(newGrounded);
}
List <Point> orderedTriOnePts = new List <Point>();
List <Point> orderedTriTwoPts = new List <Point>();
if (!conTris.VerifyCongruentTriangles(out orderedTriOnePts, out orderedTriTwoPts))
{
return(newGrounded);
}
return(GenerateCPCTC(conTris, orderedTriOnePts, orderedTriTwoPts));
}
//
// Modify the given information to account for redundancy in stated nodes
// That is, does given information strengthen a figure node?
//
private List <ConcreteAST.GroundedClause> DoGivensStrengthenFigure()
{
List <ConcreteAST.GroundedClause> modifiedGivens = new List <ConcreteAST.GroundedClause>();
ConcreteAST.GroundedClause currentGiven = null;
foreach (ConcreteAST.GroundedClause given in givens)
{
currentGiven = given;
foreach (ConcreteAST.GroundedClause component in figure)
{
if (component.CanBeStrengthenedTo(given))
{
currentGiven = new ConcreteAST.Strengthened(component, given);
break;
}
}
modifiedGivens.Add(currentGiven);
}
return(modifiedGivens);
}
public GeometricSegmentEquation(GroundedClause l, GroundedClause r) : base(l, r)
{
}
public override bool ContainsClause(GroundedClause target)
{
// If a composite node, check accordingly; this will return false if they are atomic
return(lhs.ContainsClause(target) || rhs.ContainsClause(target));
}
public Subtraction(GroundedClause l, GroundedClause r) : base(l, r)
{
}
public Equation(GroundedClause l, GroundedClause r) : base()
{
lhs = l;
rhs = r;
}
public AlgebraicSegmentEquation(GroundedClause l, GroundedClause r) : base(l, r)
{
}
public override bool ContainsClause(GroundedClause target)
{
return(this.Equals(target));
}
// Acquire the index of the clause in the hypergraph based only on structure
public static int StructuralIndex(Hypergraph.Hypergraph <ConcreteAST.GroundedClause, Hypergraph.EdgeAnnotation> graph, ConcreteAST.GroundedClause g)
{
//
// Handle general case
//
List <Hypergraph.HyperNode <ConcreteAST.GroundedClause, Hypergraph.EdgeAnnotation> > vertices = graph.vertices;
for (int v = 0; v < vertices.Count; v++)
{
if (vertices[v].data.StructurallyEquals(g))
{
return(v);
}
if (vertices[v].data is ConcreteAST.Strengthened)
{
if ((vertices[v].data as ConcreteAST.Strengthened).strengthened.StructurallyEquals(g))
{
return(v);
}
}
}
//
// Handle strengthening by seeing if the clause is found without a 'strengthening' component
//
ConcreteAST.Strengthened streng = g as ConcreteAST.Strengthened;
if (streng != null)
{
int index = StructuralIndex(graph, streng.strengthened);
if (index != -1)
{
return(index);
}
}
return(-1);
}
public Multiplication(GroundedClause l, GroundedClause r) : base(l, r)
{
}
public GeometricArcEquation(GroundedClause l, GroundedClause r) : base(l, r)
{
}