| Vec3Real64 Impala::Core::Array::Element::ColHSI2RGB | ( | const Vec3Real64 & | v | ) | [inline] |
Conversion from HSI to RGB.
No formula yet...
Definition at line 272 of file ColConvert.h.
References FIVE_PI_3, FOUR_PI_3, PI, PI_3, TWO_PI_3, Impala::Core::Array::Element::Vec3Real64::X(), Impala::Core::Array::Element::Vec3Real64::Y(), and Impala::Core::Array::Element::Vec3Real64::Z().
Referenced by Impala::Visualization::Plot::Similarity::SelectColor(), Impala::Core::Array::Element::Color::ToCMY(), Impala::Core::Array::Element::Color::ToLab(), Impala::Core::Array::Element::Color::ToLuv(), Impala::Core::Array::Element::Color::ToOOO(), Impala::Core::Array::Element::Color::ToRGB(), and Impala::Core::Array::Element::Color::ToXYZ().
00273 { 00274 double H = v.X(); 00275 double S = v.Y(); 00276 double I = v.Z(); 00277 double Htmp; 00278 double R,B,G; 00279 00280 if (H == 0.0) 00281 R = G = B = I; 00282 else if (H > 0.0 && H < TWO_PI_3 ) { 00283 Htmp = 1 / sqrt(3.0) * tan(H - PI_3); 00284 B = (1.0 - S) * I; 00285 G = (1.5 + 1.5*Htmp ) * I - ((0.5 + 1.5*Htmp) * B); 00286 R = 3.0 * I - G - B; 00287 } 00288 else if (H >= TWO_PI_3 && H < FOUR_PI_3) { 00289 Htmp = 1 / sqrt(3.0) * tan(H - PI); 00290 R = (1.0 - S) * I; 00291 B = (1.5 + 1.5*Htmp ) * I - ((0.5 + 1.5*Htmp) * R); 00292 G = 3.0 * I - B - R; 00293 } 00294 else { 00295 Htmp = 1 / sqrt(3.0) * tan(H - FIVE_PI_3); 00296 G = (1.0 - S) * I; 00297 R = (1.5 + 1.5*Htmp ) * I - ((0.5 + 1.5*Htmp) * G); 00298 B = 3.0 * I - R - G; 00299 } 00300 return Vec3Real64(R, G, B); 00301 }
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