public Triangle(double side1, double side2, double side3, double angle3, TriangleDescriptors descriptors = TriangleDescriptors.None) : this()
{
Descriptors = descriptors;
(AngleA, AngleB) = LawOfSines(SideC, AngleC, SideA, SideB, out double d);
CircumcircleDiameter = d;
Initialize();
}
/*[Flags]
* private enum Sides
* {
* None,
* SideA = 1,
* SideB = 2,
* SideC = 4
* };
*
* [Flags]
* private enum Angles
* {
* None,
* AngleA = 1,
* AngleB = 2,
* AngleC = 4
* };
*
* public Triangle(
* Tuple<double, double, double> sides,
* Tuple<Angle, Angle, Angle> angles,
* TriangleDescriptors descriptors
* ) {
* Sides sidesUnavailable = Sides.None;
* Angles anglesUnavailable = Angles.None;
* int numSidesUnavailable = 0;
* int numAnglesUnavailable = 0;
* if (sides.Item1 <= 0)
* {
* sidesUnavailable |= Sides.SideA;
++numSidesUnavailable;
* }
* if (sides.Item2 <= 0)
* {
* sidesUnavailable |= Sides.SideB;
++numSidesUnavailable;
* }
* if (sides.Item3 <= 0)
* {
* sidesUnavailable |= Sides.SideC;
++numSidesUnavailable;
* }
*
* if (angles.Item1.IsNull)
* {
* anglesUnavailable |= Angles.AngleA;
++numAnglesUnavailable;
* }
* if (angles.Item2.IsNull)
* {
* anglesUnavailable |= Angles.AngleB;
++numAnglesUnavailable;
* }
* if (angles.Item3.IsNull)
* {
* anglesUnavailable |= Angles.AngleC;
++numAnglesUnavailable;
* }
*
* if (numSidesUnavailable == 0)
* {
* if (numAnglesUnavailable == )
* }
* }*/
public Triangle(double side1, double side2, double angle3, TriangleDescriptors descriptors) :
this(
side1, side2,
descriptors == TriangleDescriptors.Right ?
Math.Sqrt((side1 * side1) + (side2 * side2)) :
LawOfCosines(side1, side2, angle3),
angle3,
descriptors
)
{
}
private void Initialize()
{
if (Descriptors == TriangleDescriptors.None)
{
bool acute = true;
foreach (var angle in new Angle[] { AngleA, AngleB, AngleC })
{
if (angle.Degrees > 90)
{
acute = false;
Descriptors |= TriangleDescriptors.Obtuse;
}
else if (angle.Degrees == 90)
{
acute = false;
Descriptors |= TriangleDescriptors.Right;
}
}
if (acute)
{
Descriptors |= TriangleDescriptors.Acute;
}
if (AngleA.Degrees == AngleB.Degrees || AngleB.Degrees == AngleC.Degrees || AngleC.Degrees == AngleA.Degrees)
{
if (AngleA.Degrees == AngleB.Degrees && AngleB.Degrees == AngleC.Degrees)
{
Descriptors |= TriangleDescriptors.Equilateral;
}
else
{
Descriptors |= TriangleDescriptors.Isoscoles;
}
}
}
Area = GetArea(SideA, SideB, SideC);
CircumcircleDiameter = SideA / Math.Sin(AngleA.Radians);
}
