ecalDrawer.h File Reference

#include "FairTask.h"
#include "TString.h"
#include <math.h>
#include <list>

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Classes
class	ecalDrawer

Functions
void	LabToRGB (Float_t L, Float_t a, Float_t b, Float_t &R, Float_t &G, Float_t &B)
Float_t	Hue_2_RGB (Float_t v1, Float_t v2, Float_t h)
void	HSLToRGB (Float_t h, Float_t s, Float_t l, Float_t &R, Float_t &G, Float_t &B)

Function Documentation

HSLToRGB()

void HSLToRGB ( Float_t  h, Float_t  s, Float_t  l, Float_t &  R, Float_t &  G, Float_t &  B  )

inline

Definition at line 165 of file ecalDrawer.h.

{
  if (s==0)
  {
    R=G=B=l;
    return;
  }
  Float_t v2;
  Float_t v1;
  if (l<0.5) v2=l*(1+s); else v2=(l+s)-(s*l);
  v1=2*l-v2;
  R=Hue_2_RGB(v1, v2, h+(1.0/3));
  G=Hue_2_RGB(v1, v2, h);
  B=Hue_2_RGB(v1, v2, h-(1.0/3));
}

Hue_2_RGB()

Float_t Hue_2_RGB ( Float_t  v1, Float_t  v2, Float_t  h  )

inline

Definition at line 154 of file ecalDrawer.h.

{
  Float_t vh=h;
  if (vh<0) vh+=1;
  if (vh>1) vh-=1;
  if (6*vh<1) return v1+(v2-v1)*6*vh;
  if (2*vh<1) return v2;
  if (3*vh<2) return (v1+(v2-v1)*(2.0/3.0-vh)*6);
  return v1;
}

LabToRGB()

void LabToRGB ( Float_t  L, Float_t  a, Float_t  b, Float_t &  R, Float_t &  G, Float_t &  B  )

inline

Convert Lab color to RGB. Formulas taken from www.easyrgb.com ** L[0.0, 1.0], a[-0.5, 0.5], b[-0.5, 0.5]

Definition at line 129 of file ecalDrawer.h.

{
  Float_t vY=(L+0.16)/1.16;
  Float_t vX=a/5.00+vY;
  Float_t vZ=vY-b/2.0;
  if (vY*vY*vY>0.008856) vY=vY*vY*vY; else vY=(vY-16.0/116.0)/7.787;
  if (vX*vX*vX>0.008856) vX=vX*vX*vX; else vX=(vX-16.0/116.0)/7.787;
  if (vZ*vZ*vZ>0.008856) vZ=vZ*vZ*vZ; else vZ=(vZ-16.0/116.0)/7.787;
  vX*=0.95047; vZ*=1.08883;
  R= vX*3.2406-vY*1.5372-vZ*0.4986;
  G=-vX*0.9689+vY*1.8758+vZ*0.0415;
  B= vX*0.0557-vY*0.2040+vZ*1.0570;
  if (R>0.0031308) R=1.055*powf(R, 1.0/2.4)-0.055; else R*=12.92;
  if (G>0.0031308) G=1.055*powf(G, 1.0/2.4)-0.055; else G*=12.92;
  if (B>0.0031308) B=1.055*powf(B, 1.0/2.4)-0.055; else B*=12.92;
  if (R<0.0) R=0.0;
  if (G<0.0) G=0.0;
  if (B<0.0) B=0.0;
  Float_t Ln=R*0.3+G*0.6+0.1*B;
  if (Ln>L)   { R*=L/Ln; G*=L/Ln; B*=L/Ln; }
  if (R>1.0) { G/=R; B/=R; R=1.0; }
  if (G>1.0) { R/=G; B/=G; G=1.0; }
  if (B>1.0) { R/=B; G/=B; B=1.0; }
}