// cpt-city: gist/rainbow (cpt)
//
// Palettes from the Yorick scientific visalisation package, an
// evolution of the GIST package, both by David H. Munro.
//
// author: David H. Munro
// copyright: BSD-like
// year: 1996
// url: https://phillips.shef.ac.uk/pub/cpt-city/gist
#declare rainbow =
color_map {
  [0.00000 color rgbf <1.0000,0.0000,0.1647,0.0000>]
  [0.00418 color rgbf <1.0000,0.0000,0.1412,0.0000>]
  [0.00837 color rgbf <1.0000,0.0000,0.1216,0.0000>]
  [0.01255 color rgbf <1.0000,0.0000,0.1020,0.0000>]
  [0.01674 color rgbf <1.0000,0.0000,0.0784,0.0000>]
  [0.02092 color rgbf <1.0000,0.0000,0.0588,0.0000>]
  [0.02510 color rgbf <1.0000,0.0000,0.0392,0.0000>]
  [0.02929 color rgbf <1.0000,0.0000,0.0157,0.0000>]
  [0.03347 color rgbf <1.0000,0.0196,0.0000,0.0000>]
  [0.03766 color rgbf <1.0000,0.0431,0.0000,0.0000>]
  [0.04184 color rgbf <1.0000,0.0627,0.0000,0.0000>]
  [0.04603 color rgbf <1.0000,0.0863,0.0000,0.0000>]
  [0.05021 color rgbf <1.0000,0.1059,0.0000,0.0000>]
  [0.05439 color rgbf <1.0000,0.1255,0.0000,0.0000>]
  [0.05858 color rgbf <1.0000,0.1490,0.0000,0.0000>]
  [0.06276 color rgbf <1.0000,0.1686,0.0000,0.0000>]
  [0.06695 color rgbf <1.0000,0.1882,0.0000,0.0000>]
  [0.07113 color rgbf <1.0000,0.2118,0.0000,0.0000>]
  [0.07531 color rgbf <1.0000,0.2314,0.0000,0.0000>]
  [0.07950 color rgbf <1.0000,0.2549,0.0000,0.0000>]
  [0.08368 color rgbf <1.0000,0.2745,0.0000,0.0000>]
  [0.08787 color rgbf <1.0000,0.2941,0.0000,0.0000>]
  [0.09205 color rgbf <1.0000,0.3176,0.0000,0.0000>]
  [0.09623 color rgbf <1.0000,0.3569,0.0000,0.0000>]
  [0.10042 color rgbf <1.0000,0.3804,0.0000,0.0000>]
  [0.10460 color rgbf <1.0000,0.4000,0.0000,0.0000>]
  [0.10879 color rgbf <1.0000,0.4235,0.0000,0.0000>]
  [0.11297 color rgbf <1.0000,0.4431,0.0000,0.0000>]
  [0.11716 color rgbf <1.0000,0.4627,0.0000,0.0000>]
  [0.12134 color rgbf <1.0000,0.4863,0.0000,0.0000>]
  [0.12552 color rgbf <1.0000,0.5059,0.0000,0.0000>]
  [0.12971 color rgbf <1.0000,0.5294,0.0000,0.0000>]
  [0.13389 color rgbf <1.0000,0.5490,0.0000,0.0000>]
  [0.13808 color rgbf <1.0000,0.5686,0.0000,0.0000>]
  [0.14226 color rgbf <1.0000,0.5922,0.0000,0.0000>]
  [0.14644 color rgbf <1.0000,0.6118,0.0000,0.0000>]
  [0.15063 color rgbf <1.0000,0.6314,0.0000,0.0000>]
  [0.15481 color rgbf <1.0000,0.6549,0.0000,0.0000>]
  [0.15900 color rgbf <1.0000,0.6980,0.0000,0.0000>]
  [0.16318 color rgbf <1.0000,0.7176,0.0000,0.0000>]
  [0.16736 color rgbf <1.0000,0.7373,0.0000,0.0000>]
  [0.17155 color rgbf <1.0000,0.7608,0.0000,0.0000>]
  [0.17573 color rgbf <1.0000,0.7804,0.0000,0.0000>]
  [0.17992 color rgbf <1.0000,0.8000,0.0000,0.0000>]
  [0.18410 color rgbf <1.0000,0.8235,0.0000,0.0000>]
  [0.18828 color rgbf <1.0000,0.8431,0.0000,0.0000>]
  [0.19247 color rgbf <1.0000,0.8667,0.0000,0.0000>]
  [0.19665 color rgbf <1.0000,0.8863,0.0000,0.0000>]
  [0.20084 color rgbf <1.0000,0.9059,0.0000,0.0000>]
  [0.20502 color rgbf <1.0000,0.9294,0.0000,0.0000>]
  [0.20921 color rgbf <1.0000,0.9490,0.0000,0.0000>]
  [0.21339 color rgbf <1.0000,0.9686,0.0000,0.0000>]
  [0.21757 color rgbf <1.0000,0.9922,0.0000,0.0000>]
  [0.22176 color rgbf <0.9608,1.0000,0.0000,0.0000>]
  [0.22594 color rgbf <0.9412,1.0000,0.0000,0.0000>]
  [0.23013 color rgbf <0.9216,1.0000,0.0000,0.0000>]
  [0.23431 color rgbf <0.8980,1.0000,0.0000,0.0000>]
  [0.23849 color rgbf <0.8784,1.0000,0.0000,0.0000>]
  [0.24268 color rgbf <0.8588,1.0000,0.0000,0.0000>]
  [0.24686 color rgbf <0.8353,1.0000,0.0000,0.0000>]
  [0.25105 color rgbf <0.8157,1.0000,0.0000,0.0000>]
  [0.25523 color rgbf <0.7922,1.0000,0.0000,0.0000>]
  [0.25941 color rgbf <0.7725,1.0000,0.0000,0.0000>]
  [0.26360 color rgbf <0.7529,1.0000,0.0000,0.0000>]
  [0.26778 color rgbf <0.7294,1.0000,0.0000,0.0000>]
  [0.27197 color rgbf <0.7098,1.0000,0.0000,0.0000>]
  [0.27615 color rgbf <0.6863,1.0000,0.0000,0.0000>]
  [0.28034 color rgbf <0.6667,1.0000,0.0000,0.0000>]
  [0.28452 color rgbf <0.6235,1.0000,0.0000,0.0000>]
  [0.28870 color rgbf <0.6039,1.0000,0.0000,0.0000>]
  [0.29289 color rgbf <0.5843,1.0000,0.0000,0.0000>]
  [0.29707 color rgbf <0.5608,1.0000,0.0000,0.0000>]
  [0.30125 color rgbf <0.5412,1.0000,0.0000,0.0000>]
  [0.30544 color rgbf <0.5176,1.0000,0.0000,0.0000>]
  [0.30962 color rgbf <0.4980,1.0000,0.0000,0.0000>]
  [0.31381 color rgbf <0.4784,1.0000,0.0000,0.0000>]
  [0.31799 color rgbf <0.4549,1.0000,0.0000,0.0000>]
  [0.32218 color rgbf <0.4353,1.0000,0.0000,0.0000>]
  [0.32636 color rgbf <0.4157,1.0000,0.0000,0.0000>]
  [0.33054 color rgbf <0.3922,1.0000,0.0000,0.0000>]
  [0.33473 color rgbf <0.3725,1.0000,0.0000,0.0000>]
  [0.33891 color rgbf <0.3490,1.0000,0.0000,0.0000>]
  [0.34310 color rgbf <0.3294,1.0000,0.0000,0.0000>]
  [0.34728 color rgbf <0.2863,1.0000,0.0000,0.0000>]
  [0.35146 color rgbf <0.2667,1.0000,0.0000,0.0000>]
  [0.35565 color rgbf <0.2471,1.0000,0.0000,0.0000>]
  [0.35983 color rgbf <0.2235,1.0000,0.0000,0.0000>]
  [0.36402 color rgbf <0.2039,1.0000,0.0000,0.0000>]
  [0.36820 color rgbf <0.1804,1.0000,0.0000,0.0000>]
  [0.37239 color rgbf <0.1608,1.0000,0.0000,0.0000>]
  [0.37657 color rgbf <0.1412,1.0000,0.0000,0.0000>]
  [0.38075 color rgbf <0.1176,1.0000,0.0000,0.0000>]
  [0.38494 color rgbf <0.0980,1.0000,0.0000,0.0000>]
  [0.38912 color rgbf <0.0745,1.0000,0.0000,0.0000>]
  [0.39331 color rgbf <0.0549,1.0000,0.0000,0.0000>]
  [0.39749 color rgbf <0.0353,1.0000,0.0000,0.0000>]
  [0.40167 color rgbf <0.0118,1.0000,0.0000,0.0000>]
  [0.40586 color rgbf <0.0000,1.0000,0.0039,0.0000>]
  [0.41004 color rgbf <0.0000,1.0000,0.0471,0.0000>]
  [0.41423 color rgbf <0.0000,1.0000,0.0667,0.0000>]
  [0.41841 color rgbf <0.0000,1.0000,0.0902,0.0000>]
  [0.42259 color rgbf <0.0000,1.0000,0.1098,0.0000>]
  [0.42678 color rgbf <0.0000,1.0000,0.1294,0.0000>]
  [0.43096 color rgbf <0.0000,1.0000,0.1529,0.0000>]
  [0.43515 color rgbf <0.0000,1.0000,0.1725,0.0000>]
  [0.43933 color rgbf <0.0000,1.0000,0.1922,0.0000>]
  [0.44351 color rgbf <0.0000,1.0000,0.2157,0.0000>]
  [0.44770 color rgbf <0.0000,1.0000,0.2353,0.0000>]
  [0.45188 color rgbf <0.0000,1.0000,0.2588,0.0000>]
  [0.45607 color rgbf <0.0000,1.0000,0.2784,0.0000>]
  [0.46025 color rgbf <0.0000,1.0000,0.2980,0.0000>]
  [0.46443 color rgbf <0.0000,1.0000,0.3216,0.0000>]
  [0.46862 color rgbf <0.0000,1.0000,0.3412,0.0000>]
  [0.47280 color rgbf <0.0000,1.0000,0.3843,0.0000>]
  [0.47699 color rgbf <0.0000,1.0000,0.4039,0.0000>]
  [0.48117 color rgbf <0.0000,1.0000,0.4275,0.0000>]
  [0.48536 color rgbf <0.0000,1.0000,0.4471,0.0000>]
  [0.48954 color rgbf <0.0000,1.0000,0.4667,0.0000>]
  [0.49372 color rgbf <0.0000,1.0000,0.4902,0.0000>]
  [0.49791 color rgbf <0.0000,1.0000,0.5098,0.0000>]
  [0.50209 color rgbf <0.0000,1.0000,0.5294,0.0000>]
  [0.50628 color rgbf <0.0000,1.0000,0.5529,0.0000>]
  [0.51046 color rgbf <0.0000,1.0000,0.5725,0.0000>]
  [0.51464 color rgbf <0.0000,1.0000,0.5961,0.0000>]
  [0.51883 color rgbf <0.0000,1.0000,0.6157,0.0000>]
  [0.52301 color rgbf <0.0000,1.0000,0.6353,0.0000>]
  [0.52720 color rgbf <0.0000,1.0000,0.6588,0.0000>]
  [0.53138 color rgbf <0.0000,1.0000,0.6784,0.0000>]
  [0.53556 color rgbf <0.0000,1.0000,0.7216,0.0000>]
  [0.53975 color rgbf <0.0000,1.0000,0.7412,0.0000>]
  [0.54393 color rgbf <0.0000,1.0000,0.7647,0.0000>]
  [0.54812 color rgbf <0.0000,1.0000,0.7843,0.0000>]
  [0.55230 color rgbf <0.0000,1.0000,0.8039,0.0000>]
  [0.55649 color rgbf <0.0000,1.0000,0.8275,0.0000>]
  [0.56067 color rgbf <0.0000,1.0000,0.8471,0.0000>]
  [0.56485 color rgbf <0.0000,1.0000,0.8706,0.0000>]
  [0.56904 color rgbf <0.0000,1.0000,0.8902,0.0000>]
  [0.57322 color rgbf <0.0000,1.0000,0.9098,0.0000>]
  [0.57741 color rgbf <0.0000,1.0000,0.9333,0.0000>]
  [0.58159 color rgbf <0.0000,1.0000,0.9529,0.0000>]
  [0.58577 color rgbf <0.0000,1.0000,0.9725,0.0000>]
  [0.58996 color rgbf <0.0000,1.0000,0.9961,0.0000>]
  [0.59414 color rgbf <0.0000,0.9804,1.0000,0.0000>]
  [0.59833 color rgbf <0.0000,0.9373,1.0000,0.0000>]
  [0.60251 color rgbf <0.0000,0.9176,1.0000,0.0000>]
  [0.60669 color rgbf <0.0000,0.8941,1.0000,0.0000>]
  [0.61088 color rgbf <0.0000,0.8745,1.0000,0.0000>]
  [0.61506 color rgbf <0.0000,0.8549,1.0000,0.0000>]
  [0.61925 color rgbf <0.0000,0.8314,1.0000,0.0000>]
  [0.62343 color rgbf <0.0000,0.8118,1.0000,0.0000>]
  [0.62762 color rgbf <0.0000,0.7882,1.0000,0.0000>]
  [0.63180 color rgbf <0.0000,0.7686,1.0000,0.0000>]
  [0.63598 color rgbf <0.0000,0.7490,1.0000,0.0000>]
  [0.64017 color rgbf <0.0000,0.7255,1.0000,0.0000>]
  [0.64435 color rgbf <0.0000,0.7059,1.0000,0.0000>]
  [0.64854 color rgbf <0.0000,0.6824,1.0000,0.0000>]
  [0.65272 color rgbf <0.0000,0.6627,1.0000,0.0000>]
  [0.65690 color rgbf <0.0000,0.6431,1.0000,0.0000>]
  [0.66109 color rgbf <0.0000,0.6000,1.0000,0.0000>]
  [0.66527 color rgbf <0.0000,0.5804,1.0000,0.0000>]
  [0.66946 color rgbf <0.0000,0.5569,1.0000,0.0000>]
  [0.67364 color rgbf <0.0000,0.5373,1.0000,0.0000>]
  [0.67782 color rgbf <0.0000,0.5137,1.0000,0.0000>]
  [0.68201 color rgbf <0.0000,0.4941,1.0000,0.0000>]
  [0.68619 color rgbf <0.0000,0.4745,1.0000,0.0000>]
  [0.69038 color rgbf <0.0000,0.4510,1.0000,0.0000>]
  [0.69456 color rgbf <0.0000,0.4314,1.0000,0.0000>]
  [0.69874 color rgbf <0.0000,0.4118,1.0000,0.0000>]
  [0.70293 color rgbf <0.0000,0.3882,1.0000,0.0000>]
  [0.70711 color rgbf <0.0000,0.3686,1.0000,0.0000>]
  [0.71130 color rgbf <0.0000,0.3451,1.0000,0.0000>]
  [0.71548 color rgbf <0.0000,0.3255,1.0000,0.0000>]
  [0.71966 color rgbf <0.0000,0.3059,1.0000,0.0000>]
  [0.72385 color rgbf <0.0000,0.2627,1.0000,0.0000>]
  [0.72803 color rgbf <0.0000,0.2431,1.0000,0.0000>]
  [0.73222 color rgbf <0.0000,0.2196,1.0000,0.0000>]
  [0.73640 color rgbf <0.0000,0.2000,1.0000,0.0000>]
  [0.74059 color rgbf <0.0000,0.1765,1.0000,0.0000>]
  [0.74477 color rgbf <0.0000,0.1569,1.0000,0.0000>]
  [0.74895 color rgbf <0.0000,0.1373,1.0000,0.0000>]
  [0.75314 color rgbf <0.0000,0.1137,1.0000,0.0000>]
  [0.75732 color rgbf <0.0000,0.0941,1.0000,0.0000>]
  [0.76151 color rgbf <0.0000,0.0706,1.0000,0.0000>]
  [0.76569 color rgbf <0.0000,0.0510,1.0000,0.0000>]
  [0.76987 color rgbf <0.0000,0.0314,1.0000,0.0000>]
  [0.77406 color rgbf <0.0000,0.0078,1.0000,0.0000>]
  [0.77824 color rgbf <0.0078,0.0000,1.0000,0.0000>]
  [0.78243 color rgbf <0.0275,0.0000,1.0000,0.0000>]
  [0.78661 color rgbf <0.0706,0.0000,1.0000,0.0000>]
  [0.79079 color rgbf <0.0941,0.0000,1.0000,0.0000>]
  [0.79498 color rgbf <0.1137,0.0000,1.0000,0.0000>]
  [0.79916 color rgbf <0.1333,0.0000,1.0000,0.0000>]
  [0.80335 color rgbf <0.1569,0.0000,1.0000,0.0000>]
  [0.80753 color rgbf <0.1765,0.0000,1.0000,0.0000>]
  [0.81171 color rgbf <0.1961,0.0000,1.0000,0.0000>]
  [0.81590 color rgbf <0.2196,0.0000,1.0000,0.0000>]
  [0.82008 color rgbf <0.2392,0.0000,1.0000,0.0000>]
  [0.82427 color rgbf <0.2627,0.0000,1.0000,0.0000>]
  [0.82845 color rgbf <0.2824,0.0000,1.0000,0.0000>]
  [0.83264 color rgbf <0.3020,0.0000,1.0000,0.0000>]
  [0.83682 color rgbf <0.3255,0.0000,1.0000,0.0000>]
  [0.84100 color rgbf <0.3451,0.0000,1.0000,0.0000>]
  [0.84519 color rgbf <0.3647,0.0000,1.0000,0.0000>]
  [0.84937 color rgbf <0.4078,0.0000,1.0000,0.0000>]
  [0.85356 color rgbf <0.4314,0.0000,1.0000,0.0000>]
  [0.85774 color rgbf <0.4510,0.0000,1.0000,0.0000>]
  [0.86192 color rgbf <0.4706,0.0000,1.0000,0.0000>]
  [0.86611 color rgbf <0.4941,0.0000,1.0000,0.0000>]
  [0.87029 color rgbf <0.5137,0.0000,1.0000,0.0000>]
  [0.87448 color rgbf <0.5333,0.0000,1.0000,0.0000>]
  [0.87866 color rgbf <0.5569,0.0000,1.0000,0.0000>]
  [0.88284 color rgbf <0.5765,0.0000,1.0000,0.0000>]
  [0.88703 color rgbf <0.6000,0.0000,1.0000,0.0000>]
  [0.89121 color rgbf <0.6196,0.0000,1.0000,0.0000>]
  [0.89540 color rgbf <0.6392,0.0000,1.0000,0.0000>]
  [0.89958 color rgbf <0.6627,0.0000,1.0000,0.0000>]
  [0.90377 color rgbf <0.6824,0.0000,1.0000,0.0000>]
  [0.90795 color rgbf <0.7059,0.0000,1.0000,0.0000>]
  [0.91213 color rgbf <0.7451,0.0000,1.0000,0.0000>]
  [0.91632 color rgbf <0.7686,0.0000,1.0000,0.0000>]
  [0.92050 color rgbf <0.7882,0.0000,1.0000,0.0000>]
  [0.92469 color rgbf <0.8078,0.0000,1.0000,0.0000>]
  [0.92887 color rgbf <0.8314,0.0000,1.0000,0.0000>]
  [0.93305 color rgbf <0.8510,0.0000,1.0000,0.0000>]
  [0.93724 color rgbf <0.8745,0.0000,1.0000,0.0000>]
  [0.94142 color rgbf <0.8941,0.0000,1.0000,0.0000>]
  [0.94561 color rgbf <0.9137,0.0000,1.0000,0.0000>]
  [0.94979 color rgbf <0.9373,0.0000,1.0000,0.0000>]
  [0.95397 color rgbf <0.9569,0.0000,1.0000,0.0000>]
  [0.95816 color rgbf <0.9765,0.0000,1.0000,0.0000>]
  [0.96234 color rgbf <1.0000,0.0000,0.9961,0.0000>]
  [0.96653 color rgbf <1.0000,0.0000,0.9765,0.0000>]
  [0.97071 color rgbf <1.0000,0.0000,0.9529,0.0000>]
  [0.97490 color rgbf <1.0000,0.0000,0.9137,0.0000>]
  [0.97908 color rgbf <1.0000,0.0000,0.8902,0.0000>]
  [0.98326 color rgbf <1.0000,0.0000,0.8706,0.0000>]
  [0.98745 color rgbf <1.0000,0.0000,0.8510,0.0000>]
  [0.99163 color rgbf <1.0000,0.0000,0.8275,0.0000>]
  [0.99582 color rgbf <1.0000,0.0000,0.8078,0.0000>]
  [1.00000 color rgbf <1.0000,0.0000,0.7882,0.0000>]
}