private List<KeyValuePair<Segment, double>> CalcSidesHypotenuseUnknown(RightTriangle tri, Angle knownAngle, double knownAngleVal, Segment knownSide, double sideVal)
{
List<KeyValuePair<Segment, double>> pairs = new List<KeyValuePair<Segment, double>>();
Segment hypotenuse = tri.GetHypotenuse();
Segment oppSideOfAngle = tri.GetOppositeSide(knownAngle);
Segment adjacent = knownAngle.OtherRay(hypotenuse);
if (oppSideOfAngle.StructurallyEquals(knownSide))
{
double adjVal = sideVal / Math.Tan(Angle.toRadians(knownAngleVal));
pairs.Add(new KeyValuePair<Segment, double>(adjacent, adjVal));
pairs.Add(new KeyValuePair<Segment, double>(hypotenuse, Math.Sqrt(sideVal * sideVal + adjVal * adjVal)));
}
else if (adjacent.StructurallyEquals(knownSide))
{
double oppVal = sideVal * Math.Tan(Angle.toRadians(knownAngleVal));
pairs.Add(new KeyValuePair<Segment, double>(oppSideOfAngle, oppVal));
pairs.Add(new KeyValuePair<Segment, double>(hypotenuse, Math.Sqrt(sideVal * sideVal + oppVal * oppVal)));
}
return pairs;
}
//
// Is the given angle directly exterior to this triangle?
//
// The triangle must share a side with the angle, the non-shared side must extend the adjacent side
public bool HasExteriorAngle(Angle extAngle)
{
// Disallow any angle in this triangle (since it technically satisfies the requirements)
if (HasAngle(extAngle)) return false;
// Determine which angle in the triangle has the same vertex as the input angle
Angle triangleAngle = GetAngleWithVertex(extAngle.GetVertex());
if (triangleAngle == null) return false;
// Acquire the ray that is shared between the angle and the triangle
Segment sharedSegment = triangleAngle.SharedRay(extAngle);
if (sharedSegment == null) return false;
// Acquire the other side of the triangle
Segment otherTriangleSegment = triangleAngle.OtherRay(sharedSegment);
if (otherTriangleSegment == null) return false;
// Acquire the ray that is not shared
Segment exteriorSegment = extAngle.OtherRay(sharedSegment);
if (exteriorSegment == null) return false;
// DISALLOW ALLOW
// / /
// / \ / \
// /TRI\ /TRI\
// /-----\ /-----\
// / \
// / \
// / \
return otherTriangleSegment.IsCollinearWith(exteriorSegment);
}
//
//
// Given 1 side of a right triangle and an angle, calculate the other 2 sides.
//
//
private List<KeyValuePair<Segment, double>> CalcSidesHypotenuseKnown(RightTriangle tri, Angle knownAngle, double knownAngleVal, Segment hypotenuse, double hypotVal)
{
List<KeyValuePair<Segment, double>> pairs = new List<KeyValuePair<Segment, double>>();
double oppSideLength = hypotVal * Math.Sin(Angle.toRadians(knownAngleVal));
pairs.Add(new KeyValuePair<Segment,double>(tri.GetOppositeSide(knownAngle), oppSideLength));
double adjSideLength = hypotVal * Math.Cos(Angle.toRadians(knownAngleVal));
pairs.Add(new KeyValuePair<Segment, double>(knownAngle.OtherRay(hypotenuse), adjSideLength));
return pairs;
}
