/**
* <inheritdoc />
*/
public override double GetCCT()
{
if (DataSource is BlackBodySpectrum)
{
return((DataSource as BlackBodySpectrum).CCT);
}
if (!double.IsNaN(CCT))
{
return(CCT);
}
// Precomputing interpolation tables...
if (TemperatureChromaticities == null)
{
// Oversized to improve alignment (needs 302).
TemperatureChromaticities = new List <CIE1960> (512);
// From 1000º K to 20000º K
for (double t = 1000.0; t < 20001.0; t *= 1.01)
{
TemperatureChromaticities.Add(
new BlackBodySpectrum(t).ToCIEXYZ(Spd2ClrStrategy.Nm1Deg2).ToCIEUCS()
);
}
}
int bestI = 0;
Duv = double.PositiveInfinity;
// First gross grained search
// TODO: This is a naive search, must be improved!
for (int i = 0; i < TemperatureChromaticities.Count; i++)
{
double tmpDuv = Math.Sqrt(
Math.Pow(u - TemperatureChromaticities [i].u, 2) +
Math.Pow(v - TemperatureChromaticities [i].v, 2)
);
if (Duv > tmpDuv)
{
Duv = tmpDuv;
bestI = i;
}
}
CCT = TemperatureChromaticities [bestI].GetCCT();
// Preparing the following fine grained search
double tMin = TemperatureChromaticities [
(bestI > 0) ? bestI - 1 : bestI
].GetCCT();
double tMax = TemperatureChromaticities [
(bestI < TemperatureChromaticities.Count - 1) ? bestI + 1 : bestI
].GetCCT();
double tDiff = (tMax - tMin) / 100.0;
// Second fine grained search
for (double t = tMin; t < tMax; t += tDiff)
{
var tmpUV = new BlackBodySpectrum(t).ToCIEXYZ(Spd2ClrStrategy.Nm1Deg2).ToCIEUCS();
double tmpDuv = Math.Sqrt(Math.Pow(u - tmpUV.u, 2) + Math.Pow(v - tmpUV.v, 2));
if (Duv > tmpDuv)
{
Duv = tmpDuv;
CCT = t;
}
}
return(CCT);
}
public static Vector3 ConvertTemperature(float colorTemperature)
{
var srgb = new BlackBodySpectrum(colorTemperature).ToSRGB();
return(new Vector3((float)srgb.R, (float)srgb.G, (float)srgb.B));
}
/**
* <inheritdoc />
*/
public override double GetCCT()
{
if (DataSource is BlackBodySpectrum) {
return (DataSource as BlackBodySpectrum).CCT;
}
if (!double.IsNaN (CCT)) {
return CCT;
}
// Precomputing interpolation tables...
if (TemperatureChromaticities == null) {
// Oversized to improve alignment (needs 302).
TemperatureChromaticities = new List<CIE1960> (512);
// From 1000º K to 20000º K
for (double t = 1000.0; t < 20001.0; t *= 1.01) {
TemperatureChromaticities.Add (
new BlackBodySpectrum (t).ToCIEXYZ (Spd2ClrStrategy.Nm1Deg2).ToCIEUCS ()
);
}
}
int bestI = 0;
Duv = double.PositiveInfinity;
// First gross grained search
// TODO: This is a naive search, must be improved!
for (int i = 0; i < TemperatureChromaticities.Count; i++) {
double tmpDuv = Math.Sqrt (
Math.Pow (u - TemperatureChromaticities [i].u, 2) +
Math.Pow (v - TemperatureChromaticities [i].v, 2)
);
if (Duv > tmpDuv) {
Duv = tmpDuv;
bestI = i;
}
}
CCT = TemperatureChromaticities [bestI].GetCCT ();
// Preparing the following fine grained search
double tMin = TemperatureChromaticities [
(bestI > 0) ? bestI - 1 : bestI
].GetCCT ();
double tMax = TemperatureChromaticities [
(bestI < TemperatureChromaticities.Count - 1) ? bestI + 1 : bestI
].GetCCT ();
double tDiff = (tMax - tMin) / 100.0;
// Second fine grained search
for (double t = tMin; t < tMax; t += tDiff) {
var tmpUV = new BlackBodySpectrum (t).ToCIEXYZ (Spd2ClrStrategy.Nm1Deg2).ToCIEUCS ();
double tmpDuv = Math.Sqrt (Math.Pow (u - tmpUV.u, 2) + Math.Pow (v - tmpUV.v, 2));
if (Duv > tmpDuv) {
Duv = tmpDuv;
CCT = t;
}
}
return CCT;
}
public static Vector3 ConvertTemperature(float colorTemperature)
{
var srgb = new BlackBodySpectrum(colorTemperature).ToSRGB();
return new Vector3((float)srgb.R, (float)srgb.G, (float)srgb.B);
}
