Spectrum CaluclateBlackBody(double CCT){
/*
* h = 6.62607E-34
* c= 3*10E8
* kB = 1.38065E-23; -- Boltzman constant
* 2hc^2 = 1.1926926E-14
* hc/kB = 0.0143977184659399558179118531126643247745627059718248
*
*/
double hc = 1.1926926E-16;
double hckB =0.0143977;
vector <double> tab;
double mianownik;
for (int i=0;i<SIZE;i++) {
mianownik = pow(Wavelength.getData()[i]*0.000000001,5)*(exp(hckB/(Wavelength.getData()[i]*0.000000001*CCT))-1);
tab.push_back(hc/(mianownik));
}
Spectrum BlackBody;
BlackBody.setData(&tab);
return BlackBody;
//$I$2/((A5*0,000000001)^5)/(EXP($I$3/(A5*0,000000001*$I$1))-1)
/*
* 2hc^2/(lambda^5 * e^(hc/lambda*kBT)-1)
*/
}
double calculateCCT(Spectrum &normalizeData){
double CCT;
double X=0,Y=0,Z=0,u=0,v=0;
for(int i=0;i<SIZE;i++)
{
X+=normalizeData.getData()[i]*xyz_bar[0].getData()[i];
Y+=normalizeData.getData()[i]*xyz_bar[1].getData()[i];
Z+=normalizeData.getData()[i]*xyz_bar[2].getData()[i];
}
u = 4*X/(X+15*Y+3*Z);
v = 6*X/(X+15*Y+3*Z);
double x = X/(X+Y+Z);
double y = Y/(X+Y+Z);
double xe = 0.3320;
double ye = 0.1858;
double n = ((x-xe)/(y-ye));
double CCT_value = -449*pow(n,3)+3524*pow(n,2)-6823.3*n+5520.33;
return CCT_value;
//Approximation:
//CCT(x, y) = ?449n3 + 3525n2 ? 6823.3n + 5520.33,
// n = (x ? xe)/(y ? ye) is the inverse slope line, and (xe = 0.3320, ye = 0.1858) is the "epicenter"
}
Spectrum normalizeSpectrum(Spectrum data){
Spectrum output;
double sum = 0;
vector <double> dataValue = data.getData();
vector <double> xyzValue = xyz_bar[1].getData();
for (int i=0;i<SIZE;i++) {
sum += dataValue[i] * xyzValue[i];
}
for(int i = 0; i<SIZE; i++){
dataValue[i] = (dataValue[i]/sum)*100;
}
//vector <double> tab[SIZE];
output.setData(&dataValue);
return output;
}
void calculate_uv(Spectrum &Data, double (&uvY)[3][SIZE_TSC]){
double tab[3][SIZE];
double x, y;
double xyz[3][SIZE_TSC];
for(int i=0;i<SIZE_TSC;i++)
{
for (int k = 0; k<3;k++) {
xyz[k][i]=0;
for(int j=0;j<SIZE;j++){
tab[k][j] = TSC[i].getData()[j]*Data.getData()[j]*xyz_bar[k].getData()[j];
xyz[k][i]+=tab[k][j];
}
}
x=xyz[0][i]/(xyz[0][i]+xyz[1][i]+xyz[2][i]);
y=xyz[1][i]/(xyz[0][i]+xyz[1][i]+xyz[2][i]);
uvY[0][i]=4*x/(-2*x+12*y+3);
uvY[1][i]=6*y/(-2*x+12*y+3);
uvY[2][i]=xyz[1][i];
}
}
