/// **Overview** Calculates the correct rotation matrix and applies it to all the sides and vertices of
/// the given trungle. Builds a new trungle object, adds it to the scene, and returns a reference to that
/// new child to be added to the list.
///
/// **Params**
/// - current - triangle to be rotated
/// - angle - angle to rotate through
/// - CoR1 - first center of rotation
/// - CoR2 - second center of rotation
/// - side - string representation of what side we are reflecting across, e.g. `"AB"`
/// - direction - direction to rotate about
///
/// **Returns** a new `TrungleBehavior` which is a rotated version of the given triangle
private TrungleBehavior RotateTriangle(TrungleBehavior current, float angle, Vector3 CoR1, Vector3 CoR2, string side, RotationDirection direction)
{
Matrix m = new Matrix(CoR1, CoR2, angle, direction);
Vector3 newAlpha, newBeta, newGamma;
Vector3 newAP, newBP, newCP;
if (side == "AB" || side == "AC")
{
newAlpha = current.AlphaPoint;
newAP = current.APrime;
}
else
{
newAlpha = current.AlphaPoint.ApplyMatrix(m);
if (References.CurrentType == TriangleType.Euclidean)
{
newAP = References.Infinity;
}
else
{
newAP = current.APrime.ApplyMatrix(m);
}
}
if (side == "AB" || side == "BC")
{
newBeta = current.BetaPoint;
newBP = current.BPrime;
}
else
{
newBeta = current.BetaPoint.ApplyMatrix(m);
if (References.CurrentType == TriangleType.Euclidean)
{
newBP = References.Infinity;
}
else
{
newBP = current.BPrime.ApplyMatrix(m);
}
}
if (side == "AC" || side == "BC")
{
newGamma = current.GammaPoint;
newCP = current.CPrime;
}
else
{
newGamma = current.GammaPoint.ApplyMatrix(m);
if (References.CurrentType == TriangleType.Euclidean)
{
newCP = References.Infinity;
}
else
{
newCP = current.CPrime.ApplyMatrix(m);
}
}
Vector3[] newAB, newAC, newBC;
bool newABwasReflectedAcross = false,
newACwasReflectedAcross = false,
newBCwasReflectedAcross = false;
bool newABisArc, newACisArc, newBCisArc;
// if not doing a Euclidean rotation, everything becomes an arc
// we check the Matrix that we used for rotations to see if that is Mobius
if (m.IsMobius)
{
newABisArc = newACisArc = newBCisArc = true;
}
// otherwise, take the previous values
else
{
newABisArc = current.Parent.ABisArc;
newACisArc = current.Parent.ACisArc;
newBCisArc = current.Parent.BCisArc;
}
if (side == "AB")
{
newAB = (Vector3[])current.AB_Points.Clone();
current.ABwasReflectedAcross = true;
newABwasReflectedAcross = true;
}
else
{
newAB = TrungleUtils.Rotate(current.Parent.AB_Points, m);
}
if (side == "AC")
{
newAC = (Vector3[])current.AC_Points.Clone();
current.ACwasReflectedAcross = true;
newACwasReflectedAcross = true;
}
else
{
newAC = TrungleUtils.Rotate(current.Parent.AC_Points, m);
}
if (side == "BC")
{
newBC = (Vector3[])current.BC_Points.Clone();
current.BCwasReflectedAcross = true;
newBCwasReflectedAcross = true;
}
else
{
newBC = TrungleUtils.Rotate(current.Parent.BC_Points, m);
}
GameObject go = Instantiate(trungleStandard, Vector3.zero, Quaternion.identity);
go.name = "Gen" + (current.Generation + 1).ToString();
TrungleBehavior child = go.GetComponent <TrungleBehavior>();
child.Generation = current.Generation + 1;
child.ABwasReflectedAcross = newABwasReflectedAcross;
child.ACwasReflectedAcross = newACwasReflectedAcross;
child.BCwasReflectedAcross = newBCwasReflectedAcross;
child.ABisArc = newABisArc;
child.ACisArc = newACisArc;
child.BCisArc = newBCisArc;
child.SetPoints(newAlpha, newBeta, newGamma);
child.SetPrimePoints(newAP, newBP, newCP);
child.SetAngles(current.AlphaAngle, current.BetaAngle, current.GammaAngle);
child.SetSides(newAB, newAC, newBC);
child.Parent = current;
return(child);
}
/// **Overview** Calculate all necessary values and build the first trungle, adding
/// it to the scene.
///
/// **Params**
/// - newAlpha: new alpha angle
/// - newBeta: new beta angle
/// - newGamma: new gamma angle
public void BuildFirstTriangle(float newAlpha, float newBeta, float newGamma)
{
GameObject go = Instantiate(trungleStandard, Vector3.zero, Quaternion.identity);
go.name = "Gen0 a.k.a. GOD TRUNGLE";
TrungleBehavior triangle = go.GetComponent <TrungleBehavior>();
// required for calculations but are the same for each trungle
Vector3 a = new Vector3(0, 0, 0);
Vector3 b = new Vector3(1, 0, 0);
// these are different per triangle and are set in each if branch
Vector3 c;
Vector3 aP, bP, cP; // prime points
List <Vector3> bc;
if (References.CurrentType == TriangleType.Euclidean)
{
var gammaX = (Mathf.Sin(newBeta) * Mathf.Cos(newAlpha)) / Mathf.Sin(newGamma);
var gammaY = (Mathf.Sin(newBeta) * Mathf.Sin(newAlpha)) / Mathf.Sin(newGamma);
c = new Vector3(gammaX, gammaY, 0);
aP = bP = cP = References.Infinity;
bc = TrungleUtils.LineBetween(b, c);
triangle.BCisArc = false;
}
else
{
var A = (Mathf.Tan(newGamma + newAlpha) * Mathf.Tan(newAlpha)) + 1;
var E = (Mathf.Tan(newGamma + newAlpha) + Mathf.Tan(newBeta)) - (A * Mathf.Tan(newBeta));
var F = (Mathf.Tan(newAlpha) * Mathf.Tan(newGamma + newAlpha))
+ (Mathf.Tan(newAlpha) * Mathf.Tan(newBeta))
- A;
var G = 1 - A;
var H = Mathf.Tan(newAlpha);
var a_ = (E * E) + (F * F) - ((A * A) * Mathf.Pow(Mathf.Tan(newBeta), 2)) - (A * A);
var b_ = (2 * E * G) + (2 * F * H);
var c_ = (G * G) + (H * H);
float centerY;
// we commence the Weird Hyperbolic checks
const float piOverTwo = 90 * Mathf.Deg2Rad;
if ((newBeta > piOverTwo && newGamma < piOverTwo) ||
(newBeta < piOverTwo && newGamma > piOverTwo))
{
centerY = (-b_ + (Mathf.Sqrt((b_ * b_) - (4 * a_ * c_)))) / (2 * a_);
}
else
{
centerY = (-b_ - (Mathf.Sqrt((b_ * b_) - (4 * a_ * c_)))) / (2 * a_);
}
float centerX = 1 + (centerY * Mathf.Tan(newBeta));
var radius = Mathf.Sqrt(((1 - centerX) * (1 - centerX)) + (centerY * centerY));
var center = new Vector3(centerX, centerY, 0);
var gammaX = (Mathf.Tan(newAlpha + newGamma) * centerY + centerX) / A;
var gammaY = ((Mathf.Tan(newAlpha + newGamma) * centerY + centerX) / A) * Mathf.Tan(newAlpha);
c = new Vector3(gammaX, gammaY, 0);
aP = References.Infinity;
bP = TrungleUtils.CalculateBPrime(center, radius, b);
cP = TrungleUtils.CalculateCPrime(c, center, radius);
bc = TrungleUtils.ArcBetween(b, c, center, radius, newAlpha);
triangle.BCisArc = true;
}
// these are in common too but couldn't be set until after the ifs
List <Vector3> ab = TrungleUtils.LineBetween(a, b);
List <Vector3> ac = TrungleUtils.LineBetween(a, c);
// everything left is in common and should be set by now:
triangle.Generation = 0;
triangle.ABwasReflectedAcross = false;
triangle.ACwasReflectedAcross = false;
triangle.BCwasReflectedAcross = false;
triangle.ABisArc = false;
triangle.ACisArc = false;
triangle.SetAngles(newAlpha, newBeta, newGamma);
triangle.SetPoints(a, b, c);
triangle.SetPrimePoints(aP, bP, cP);
triangle.SetSides(ab, ac, bc);
trungles.Add(triangle);
}
