public static NI2dPoint divergingOvalptpt(NI2dPoint F, double n1, NI2dVector v, NI2dPoint G, double n2, double S)
{
NI2dPoint ovalpt = new NI2dPoint(0, 0);
v.Normalize();
NI2dVector v1 = new NI2dVector(F, G);
double C1 = n1 * S + (n2 * n2) * v1.DotProduct(v);
double C2 = S * S - (n2 * n2) * v1.DotProduct(v1);
double gamma = -1.0;
double sigma = 0.0;
if (n1 > n2)
{
sigma = -1 * gamma;
}
else if (n1 < n2)
{
sigma = 1 * gamma;
}
double c1numerator = C1 + sigma * Math.Sqrt(C2 * (n2 * n2 - n1 * n1) + C1 * C1);
double c1denominator = n1 * n1 - n2 * n2;
double c1 = c1numerator / c1denominator;
ovalpt = F + c1 * v.ConverttoPoint();
return(ovalpt);
}
public static NI2dPoint planewaveOvalpt(NI2dPoint F, double n1, NI2dVector v, NI2dPoint Q, double n2, NI2dVector n, double S)
{
NI2dPoint ovalpt = new NI2dPoint(0, 0);
NI2dVector v1 = new NI2dVector(Q, F);
double c1numerator = S - n2 * (v1.DotProduct(n));
double c1denominator = n1 - n2 * (v.DotProduct(n));
double c1 = c1numerator / c1denominator;
ovalpt = F + c1 * v.ConverttoPoint();
return(ovalpt);
}
public static NI2dPoint reflectingOvalptpt(NI2dPoint F, NI2dVector v, NI2dPoint G, double n, double S)
{
NI2dPoint ovalpt = new NI2dPoint(0, 0);
v.Normalize();
NI2dVector v1 = new NI2dVector(F, G);
double c1numerator = (S / n) * (S / n) - v1.DotProduct(v1);
double c1denominator = 2 * ((S / n) + v1.DotProduct(v));
double c1 = c1numerator / c1denominator;
ovalpt = F + c1 * v.ConverttoPoint();
return(ovalpt);
}