Utils.h

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#ifndef WIRECELLTEST_UTILS
#define WIRECELLTEST_UTILS

#include "TStyle.h"
#include "TColor.h"

void set_palette(int pal = -1);
void set_palette(int pal)
{
    if (pal > 0) {
        gStyle->SetPalette(pal);
        return;
    }

    // custom
    const int ncolors = 50;
    static int colors[ncolors];
    static bool initialized = false;
    const int npars=6;
    double  stops[npars] = { 0.00, 0.45, 0.49, 0.51, 0.55, 1.00 };
    double   reds[npars] = { 0.00, 0.00, 1.00, 1.00, 1.00, 1.00 };
    double greens[npars] = { 0.00, 0.81, 1.00, 1.00, 0.20, 0.00 };
    double  blues[npars] = { 1.00, 1.00, 1.00, 1.00, 0.00, 0.00 };
    if (!initialized) {
        int FI = TColor::CreateGradientColorTable(npars, stops, reds, greens, blues, ncolors);
        for (int ind=0; ind<ncolors; ++ind) {
            colors[ind] = FI + ind;
        }
        initialized = true;
        return;
    }
    gStyle->SetPalette(50,colors);
}

#endif