// 2 dimensional functions for E / H movement
Field Hupdate2d(Field EM, Loss lass, int t){
// update magnetic field, x direction
for (size_t dx = 0; dx < spacex - 1; dx++){
for (size_t dy = 0; dy < spacey - 1; dy++){
EM.Hz(dx,dy) = lass.HzH(dx,dy) * EM.Hz(dx, dy)
+ lass.HzE(dx,dy) * ((EM.Ex(dx, dy + 1)
- EM.Ex(dx, dy))
- (EM.Ey(dx + 1,dy)
- EM.Ey(dx, dy)));
}
}
return EM;
}
// Creating loss
Loss createloss2d(Loss lass, double eps, double Cour, double loss){
double radius = 40;
int sourcex = 200, sourcex2 = 100;
int sourcey = 100, sourcey2 = 100;
double dist, var, Q, epsp, mup, dist2;
for (size_t dx = 0; dx < spacex; dx++){
for (size_t dy = 0; dy < spacey; dy++){
dist = sqrt((dx - sourcex)*(dx - sourcex)
+ (dy - sourcey)*(dy - sourcey));
dist2 = sqrt((dx - sourcex2)*(dx - sourcex2)
+ (dy - sourcey2)*(dy - sourcey2));
// if (dx > 100 && dx < 150 && dy > 75 && dy < 125){
if (dist < radius){
Q = cbrt(-(radius / dist) + sqrt((radius/dist)
* (radius/dist) + (1.0/27.0)));
var = (Q - (1.0 / (3.0 * Q))) * (Q - (1.0/ (3.0 * Q)));
// var = 1.4;
if (abs(var) > 1000){
var = 1000;
}
if (isnan(var)){
var = 1000;
}
epsp = eps / (var * var);
mup = 1 / (var * var);
lass.ExH(dx, dy) = Cour * epsp /(1.0 - loss);
lass.ExE(dx, dy) = (1.0 - loss) / (1.0 + loss);
lass.EyE(dx, dy) = (1.0 - loss) / (1.0 + loss);
lass.EyH(dx, dy) = Cour * epsp / (1.0 + loss);
lass.HzE(dx, dy) = Cour * (mup / eps) / (1.0 + loss);
lass.HzH(dx, dy) = (1.0 - loss) / (1.0 + loss);
/*
// PEC stuff -- not complete!
lass.ExH(dx, dy) = 0;
lass.ExE(dx, dy) = 0;
lass.HzH(dx, dy) = 0;
lass.HzE(dx, dy) = 0;
lass.ExE(dx, dy) = 0;
lass.ExH(dx, dy) = 0;
*/
}
else{
lass.ExH(dx, dy) = Cour * eps;
lass.ExE(dx, dy) = 1.0;
lass.EyE(dx, dy) = 1.0;
lass.EyH(dx, dy) = Cour * eps;
lass.HzE(dx, dy) = Cour / eps;
lass.HzH(dx, dy) = 1.0;
}
}
}
return lass;
}