// cpt-city: pm/f-30-31-32 (cpt)
//
// Various gradients from Gnuplot: the original default pm3d
// colour gradient by Petr Mikulík from Masaryk University,
// nice rgb schemes listed in “help palette rgbformulae”
// and gradients from the pm3dcolors.dem demo script
//
// author: Petr Mikulik
// copyright: GPLv2
// year: 2006
// url: https://phillips.shef.ac.uk/pub/cpt-city/pm
#declare f_30_31_32 =
color_map {
  [0.00000 color rgbf <0.0000,0.0000,0.0000,0.0000>]
  [0.01587 color rgbf <0.0000,0.0000,0.0627,0.0000>]
  [0.03175 color rgbf <0.0000,0.0000,0.1255,0.0000>]
  [0.04762 color rgbf <0.0000,0.0000,0.1922,0.0000>]
  [0.06349 color rgbf <0.0000,0.0000,0.2549,0.0000>]
  [0.07936 color rgbf <0.0000,0.0000,0.3176,0.0000>]
  [0.09524 color rgbf <0.0000,0.0000,0.3804,0.0000>]
  [0.11111 color rgbf <0.0000,0.0000,0.4431,0.0000>]
  [0.12698 color rgbf <0.0000,0.0000,0.5098,0.0000>]
  [0.14286 color rgbf <0.0000,0.0000,0.5725,0.0000>]
  [0.15873 color rgbf <0.0000,0.0000,0.6353,0.0000>]
  [0.17460 color rgbf <0.0000,0.0000,0.6980,0.0000>]
  [0.19048 color rgbf <0.0000,0.0000,0.7608,0.0000>]
  [0.20635 color rgbf <0.0000,0.0000,0.8235,0.0000>]
  [0.22222 color rgbf <0.0000,0.0000,0.8902,0.0000>]
  [0.23810 color rgbf <0.0000,0.0000,0.9529,0.0000>]
  [0.25397 color rgbf <0.0118,0.0000,1.0000,0.0000>]
  [0.26984 color rgbf <0.0627,0.0000,1.0000,0.0000>]
  [0.28571 color rgbf <0.1098,0.0000,1.0000,0.0000>]
  [0.30159 color rgbf <0.1608,0.0000,1.0000,0.0000>]
  [0.31746 color rgbf <0.2118,0.0000,1.0000,0.0000>]
  [0.33333 color rgbf <0.2588,0.0000,1.0000,0.0000>]
  [0.34921 color rgbf <0.3098,0.0000,1.0000,0.0000>]
  [0.36508 color rgbf <0.3608,0.0000,1.0000,0.0000>]
  [0.38095 color rgbf <0.4078,0.0000,1.0000,0.0000>]
  [0.39682 color rgbf <0.4588,0.0000,1.0000,0.0000>]
  [0.41270 color rgbf <0.5098,0.0000,1.0000,0.0000>]
  [0.42857 color rgbf <0.5569,0.0157,0.9843,0.0000>]
  [0.44444 color rgbf <0.6078,0.0471,0.9529,0.0000>]
  [0.46032 color rgbf <0.6588,0.0824,0.9176,0.0000>]
  [0.47619 color rgbf <0.7059,0.1137,0.8863,0.0000>]
  [0.49206 color rgbf <0.7569,0.1451,0.8549,0.0000>]
  [0.50794 color rgbf <0.8078,0.1765,0.8235,0.0000>]
  [0.52381 color rgbf <0.8549,0.2078,0.7922,0.0000>]
  [0.53968 color rgbf <0.9059,0.2392,0.7608,0.0000>]
  [0.55556 color rgbf <0.9529,0.2706,0.7294,0.0000>]
  [0.57143 color rgbf <1.0000,0.3020,0.6980,0.0000>]
  [0.58730 color rgbf <1.0000,0.3333,0.6667,0.0000>]
  [0.60318 color rgbf <1.0000,0.3647,0.6353,0.0000>]
  [0.61905 color rgbf <1.0000,0.4000,0.6000,0.0000>]
  [0.63492 color rgbf <1.0000,0.4314,0.5686,0.0000>]
  [0.65079 color rgbf <1.0000,0.4627,0.5373,0.0000>]
  [0.66667 color rgbf <1.0000,0.4941,0.5059,0.0000>]
  [0.68254 color rgbf <1.0000,0.5255,0.4745,0.0000>]
  [0.69841 color rgbf <1.0000,0.5569,0.4431,0.0000>]
  [0.71429 color rgbf <1.0000,0.5882,0.4118,0.0000>]
  [0.73016 color rgbf <1.0000,0.6196,0.3804,0.0000>]
  [0.74603 color rgbf <1.0000,0.6510,0.3490,0.0000>]
  [0.76191 color rgbf <1.0000,0.6824,0.3176,0.0000>]
  [0.77778 color rgbf <1.0000,0.7137,0.2863,0.0000>]
  [0.79365 color rgbf <1.0000,0.7490,0.2510,0.0000>]
  [0.80952 color rgbf <1.0000,0.7804,0.2196,0.0000>]
  [0.82540 color rgbf <1.0000,0.8118,0.1882,0.0000>]
  [0.84127 color rgbf <1.0000,0.8431,0.1569,0.0000>]
  [0.85714 color rgbf <1.0000,0.8745,0.1255,0.0000>]
  [0.87302 color rgbf <1.0000,0.9059,0.0941,0.0000>]
  [0.88889 color rgbf <1.0000,0.9373,0.0627,0.0000>]
  [0.90476 color rgbf <1.0000,0.9686,0.0314,0.0000>]
  [0.92064 color rgbf <1.0000,1.0000,0.0078,0.0000>]
  [0.93651 color rgbf <1.0000,1.0000,0.2078,0.0000>]
  [0.95238 color rgbf <1.0000,1.0000,0.4039,0.0000>]
  [0.96825 color rgbf <1.0000,1.0000,0.6039,0.0000>]
  [0.98413 color rgbf <1.0000,1.0000,0.8000,0.0000>]
  [1.00000 color rgbf <1.0000,1.0000,1.0000,0.0000>]
}