//
// Do these segments overlay this angle?
//
public bool IsIncludedAngle(Segment seg1, Segment seg2)
{
// Do not allow the same segment.
if (seg1.StructurallyEquals(seg2))
{
return(false);
}
// Check direct inclusion
if (seg1.Equals(ray1) && seg2.Equals(ray2) || seg1.Equals(ray2) && seg2.Equals(ray1))
{
return(true);
}
// Check overlaying angle
Point shared = seg1.SharedVertex(seg2);
if (shared == null)
{
return(false);
}
Angle thatAngle = new Angle(seg1.OtherPoint(shared), shared, seg2.OtherPoint(shared));
return(this.Equates(thatAngle));
}
/// <summary>
/// Figure out what possible segment combinations are before showing the window.
/// </summary>
protected override void OnShow()
{
options = new Dictionary <GeometryTutorLib.ConcreteAST.Segment, List <GeometryTutorLib.ConcreteAST.Segment> >();
//Get a list of all congruent segment givens
List <GroundedClause> psegs = new List <GroundedClause>();
foreach (GroundedClause gc in currentGivens)
{
GeometricParallel pseg = gc as GeometricParallel;
if (pseg != null)
{
psegs.Add(pseg);
}
}
//Pick a first segment...
foreach (GeometryTutorLib.ConcreteAST.Segment ts1 in parser.backendParser.implied.segments)
{
List <GeometryTutorLib.ConcreteAST.Segment> possible = new List <GeometryTutorLib.ConcreteAST.Segment>();
GeometryTutorLib.ConcreteAST.Segment s1 = new GeometryTutorLib.ConcreteAST.Segment(ts1.Point1, ts1.Point2);
//... and see what other segments are viable second options.
foreach (GeometryTutorLib.ConcreteAST.Segment ts2 in parser.backendParser.implied.segments)
{
GeometryTutorLib.ConcreteAST.Segment s2 = new GeometryTutorLib.ConcreteAST.Segment(ts2.Point1, ts2.Point2);
if (s1.IsParallelWith(s2))
{
GeometricParallel pseg = new GeometricParallel(s1, s2);
if (!s1.StructurallyEquals(s2) && !StructurallyContains(psegs, pseg))
{
possible.Add(s2);
}
}
}
//If we found a possible list of combinations, add it to the dictionary
if (possible.Count > 0)
{
options.Add(s1, possible);
}
}
//Set the options of the segment1 combo box
segment1.ItemsSource = null; //Graphical refresh
segment1.ItemsSource = options.Keys;
}
public void GetOtherSides(Segment s, out Segment outSeg1, out Segment outSeg2)
{
outSeg1 = null;
outSeg2 = null;
if (s.StructurallyEquals(SegmentA))
{
outSeg1 = SegmentB;
outSeg2 = SegmentC;
}
else if (s.StructurallyEquals(SegmentB))
{
outSeg1 = SegmentA;
outSeg2 = SegmentC;
}
else if (s.StructurallyEquals(SegmentC))
{
outSeg1 = SegmentA;
outSeg2 = SegmentB;
}
}
private List<KeyValuePair<Segment, double>> CalcSides(RightTriangle tri, Angle rightAngle, Angle knownAngle, double knownAngleVal, Segment knownSeg, double knownSegVal)
{
//
// Determine the nature of the known Segment w.r.t. to the known angle.
//
Segment hypotenuse = tri.GetHypotenuse();
// Hypotenuse known
if (knownSeg.StructurallyEquals(hypotenuse))
{
return CalcSidesHypotenuseKnown(tri, knownAngle, knownAngleVal, hypotenuse, knownSegVal);
}
else
{
return CalcSidesHypotenuseUnknown(tri, knownAngle, knownAngleVal, knownSeg, knownSegVal);
}
}
public static Quadrilateral GenerateQuadrilateral(Segment s1, Segment s2, Segment s3, Segment s4)
{
// ____
// |
// |____
// Check a C shape of 3 segments; the 4th needs to be opposite
Segment top;
Segment bottom;
Segment left = AcquireMiddleSegment(s1, s2, s3, out top, out bottom);
// Check C for the top, bottom, and right sides
if (left == null)
{
return(null);
}
Segment right = s4;
Segment tempOut1, tempOut2;
Segment rightMid = AcquireMiddleSegment(top, bottom, right, out tempOut1, out tempOut2);
// The middle segment we acquired must match the 4th segment
if (!right.StructurallyEquals(rightMid))
{
return(null);
}
//
// The top / bottom cannot cross; bowtie or hourglass shape
// A valid quadrilateral will have the intersections outside of the quad, that is defined
// by the order of the three points: intersection and two endpts of the side
//
Point intersection = top.FindIntersection(bottom);
// Check for parallel lines, then in-betweenness
if (intersection != null && !double.IsNaN(intersection.X) && !double.IsNaN(intersection.Y))
{
if (Segment.Between(intersection, top.Point1, top.Point2))
{
return(null);
}
if (Segment.Between(intersection, bottom.Point1, bottom.Point2))
{
return(null);
}
}
// The left / right cannot cross; bowtie or hourglass shape
intersection = left.FindIntersection(right);
// Check for parallel lines, then in-betweenness
if (intersection != null && !double.IsNaN(intersection.X) && !double.IsNaN(intersection.Y))
{
if (Segment.Between(intersection, left.Point1, left.Point2))
{
return(null);
}
if (Segment.Between(intersection, right.Point1, right.Point2))
{
return(null);
}
}
//
// Verify that we have 4 unique points; And not different shapes (like a star, or triangle with another segment)
//
List <Point> pts = new List <Point>();
pts.Add(left.SharedVertex(top));
pts.Add(left.SharedVertex(bottom));
pts.Add(right.SharedVertex(bottom));
pts.Add(right.SharedVertex(top));
for (int i = 0; i < pts.Count - 1; i++)
{
for (int j = i + 1; j < pts.Count; j++)
{
if (pts[i].StructurallyEquals(pts[j]))
{
return(null);
}
}
}
return(new Quadrilateral(left, right, top, bottom));
}
//
// Do these segments overlay this angle?
//
public bool IsIncludedAngle(Segment seg1, Segment seg2)
{
// Do not allow the same segment.
if (seg1.StructurallyEquals(seg2)) return false;
// Check direct inclusion
if (seg1.Equals(ray1) && seg2.Equals(ray2) || seg1.Equals(ray2) && seg2.Equals(ray1)) return true;
// Check overlaying angle
Point shared = seg1.SharedVertex(seg2);
if (shared == null) return false;
Angle thatAngle = new Angle(seg1.OtherPoint(shared), shared, seg2.OtherPoint(shared));
return this.Equates(thatAngle);
}
public double GetSegmentLength(Segment thatSeg)
{
if (thatSeg == null)
{
// throw new ArgumentException("Why is the angle null?");
return -1;
}
foreach (KeyValuePair<Segment, double> segPair in segments)
{
if (thatSeg.StructurallyEquals(segPair.Key)) return segPair.Value;
}
return -1;
}
