viridis.h

#ifndef VIRIDIS_HPP_INCLUDED
#define VIRIDIS_HPP_INCLUDED
void map_to_viridis(float v, uint8_t& r, uint8_t& g, uint8_t& b);
#endif

#ifdef VIRIDIS_IMPLEMENTATION

const double viridis_map[] = {
0.26700401, 0.00487433, 0.32941519,
0.26851048, 0.00960483, 0.33542652,
0.26994384, 0.01462494, 0.34137895,
0.27130489, 0.01994186, 0.34726862,
0.27259384, 0.02556309, 0.35309303,
0.27380934, 0.03149748, 0.35885256,
0.27495242, 0.03775181, 0.36454323,
0.27602238, 0.04416723, 0.37016418,
0.2770184 , 0.05034437, 0.37571452,
0.27794143, 0.05632444, 0.38119074,
0.27879067, 0.06214536, 0.38659204,
0.2795655 , 0.06783587, 0.39191723,
0.28026658, 0.07341724, 0.39716349,
0.28089358, 0.07890703, 0.40232944,
0.28144581, 0.0843197 , 0.40741404,
0.28192358, 0.08966622, 0.41241521,
0.28232739, 0.09495545, 0.41733086,
0.28265633, 0.10019576, 0.42216032,
0.28291049, 0.10539345, 0.42690202,
0.28309095, 0.11055307, 0.43155375,
0.28319704, 0.11567966, 0.43611482,
0.28322882, 0.12077701, 0.44058404,
0.28318684, 0.12584799, 0.44496   ,
0.283072  , 0.13089477, 0.44924127,
0.28288389, 0.13592005, 0.45342734,
0.28262297, 0.14092556, 0.45751726,
0.28229037, 0.14591233, 0.46150995,
0.28188676, 0.15088147, 0.46540474,
0.28141228, 0.15583425, 0.46920128,
0.28086773, 0.16077132, 0.47289909,
0.28025468, 0.16569272, 0.47649762,
0.27957399, 0.17059884, 0.47999675,
0.27882618, 0.1754902 , 0.48339654,
0.27801236, 0.18036684, 0.48669702,
0.27713437, 0.18522836, 0.48989831,
0.27619376, 0.19007447, 0.49300074,
0.27519116, 0.1949054 , 0.49600488,
0.27412802, 0.19972086, 0.49891131,
0.27300596, 0.20452049, 0.50172076,
0.27182812, 0.20930306, 0.50443413,
0.27059473, 0.21406899, 0.50705243,
0.26930756, 0.21881782, 0.50957678,
0.26796846, 0.22354911, 0.5120084 ,
0.26657984, 0.2282621 , 0.5143487 ,
0.2651445 , 0.23295593, 0.5165993 ,
0.2636632 , 0.23763078, 0.51876163,
0.26213801, 0.24228619, 0.52083736,
0.26057103, 0.2469217 , 0.52282822,
0.25896451, 0.25153685, 0.52473609,
0.25732244, 0.2561304 , 0.52656332,
0.25564519, 0.26070284, 0.52831152,
0.25393498, 0.26525384, 0.52998273,
0.25219404, 0.26978306, 0.53157905,
0.25042462, 0.27429024, 0.53310261,
0.24862899, 0.27877509, 0.53455561,
0.2468114 , 0.28323662, 0.53594093,
0.24497208, 0.28767547, 0.53726018,
0.24311324, 0.29209154, 0.53851561,
0.24123708, 0.29648471, 0.53970946,
0.23934575, 0.30085494, 0.54084398,
0.23744138, 0.30520222, 0.5419214 ,
0.23552606, 0.30952657, 0.54294396,
0.23360277, 0.31382773, 0.54391424,
0.2316735 , 0.3181058 , 0.54483444,
0.22973926, 0.32236127, 0.54570633,
0.22780192, 0.32659432, 0.546532  ,
0.2258633 , 0.33080515, 0.54731353,
0.22392515, 0.334994  , 0.54805291,
0.22198915, 0.33916114, 0.54875211,
0.22005691, 0.34330688, 0.54941304,
0.21812995, 0.34743154, 0.55003755,
0.21620971, 0.35153548, 0.55062743,
0.21429757, 0.35561907, 0.5511844 ,
0.21239477, 0.35968273, 0.55171011,
0.2105031 , 0.36372671, 0.55220646,
0.20862342, 0.36775151, 0.55267486,
0.20675628, 0.37175775, 0.55311653,
0.20490257, 0.37574589, 0.55353282,
0.20306309, 0.37971644, 0.55392505,
0.20123854, 0.38366989, 0.55429441,
0.1994295 , 0.38760678, 0.55464205,
0.1976365 , 0.39152762, 0.55496905,
0.19585993, 0.39543297, 0.55527637,
0.19410009, 0.39932336, 0.55556494,
0.19235719, 0.40319934, 0.55583559,
0.19063135, 0.40706148, 0.55608907,
0.18892259, 0.41091033, 0.55632606,
0.18723083, 0.41474645, 0.55654717,
0.18555593, 0.4185704 , 0.55675292,
0.18389763, 0.42238275, 0.55694377,
0.18225561, 0.42618405, 0.5571201 ,
0.18062949, 0.42997486, 0.55728221,
0.17901879, 0.43375572, 0.55743035,
0.17742298, 0.4375272 , 0.55756466,
0.17584148, 0.44128981, 0.55768526,
0.17427363, 0.4450441 , 0.55779216,
0.17271876, 0.4487906 , 0.55788532,
0.17117615, 0.4525298 , 0.55796464,
0.16964573, 0.45626209, 0.55803034,
0.16812641, 0.45998802, 0.55808199,
0.1666171 , 0.46370813, 0.55811913,
0.16511703, 0.4674229 , 0.55814141,
0.16362543, 0.47113278, 0.55814842,
0.16214155, 0.47483821, 0.55813967,
0.16066467, 0.47853961, 0.55811466,
0.15919413, 0.4822374 , 0.5580728 ,
0.15772933, 0.48593197, 0.55801347,
0.15626973, 0.4896237 , 0.557936  ,
0.15481488, 0.49331293, 0.55783967,
0.15336445, 0.49700003, 0.55772371,
0.1519182 , 0.50068529, 0.55758733,
0.15047605, 0.50436904, 0.55742968,
0.14903918, 0.50805136, 0.5572505 ,
0.14760731, 0.51173263, 0.55704861,
0.14618026, 0.51541316, 0.55682271,
0.14475863, 0.51909319, 0.55657181,
0.14334327, 0.52277292, 0.55629491,
0.14193527, 0.52645254, 0.55599097,
0.14053599, 0.53013219, 0.55565893,
0.13914708, 0.53381201, 0.55529773,
0.13777048, 0.53749213, 0.55490625,
0.1364085 , 0.54117264, 0.55448339,
0.13506561, 0.54485335, 0.55402906,
0.13374299, 0.54853458, 0.55354108,
0.13244401, 0.55221637, 0.55301828,
0.13117249, 0.55589872, 0.55245948,
0.1299327 , 0.55958162, 0.55186354,
0.12872938, 0.56326503, 0.55122927,
0.12756771, 0.56694891, 0.55055551,
0.12645338, 0.57063316, 0.5498411 ,
0.12539383, 0.57431754, 0.54908564,
0.12439474, 0.57800205, 0.5482874 ,
0.12346281, 0.58168661, 0.54744498,
0.12260562, 0.58537105, 0.54655722,
0.12183122, 0.58905521, 0.54562298,
0.12114807, 0.59273889, 0.54464114,
0.12056501, 0.59642187, 0.54361058,
0.12009154, 0.60010387, 0.54253043,
0.11973756, 0.60378459, 0.54139999,
0.11951163, 0.60746388, 0.54021751,
0.11942341, 0.61114146, 0.53898192,
0.11948255, 0.61481702, 0.53769219,
0.11969858, 0.61849025, 0.53634733,
0.12008079, 0.62216081, 0.53494633,
0.12063824, 0.62582833, 0.53348834,
0.12137972, 0.62949242, 0.53197275,
0.12231244, 0.63315277, 0.53039808,
0.12344358, 0.63680899, 0.52876343,
0.12477953, 0.64046069, 0.52706792,
0.12632581, 0.64410744, 0.52531069,
0.12808703, 0.64774881, 0.52349092,
0.13006688, 0.65138436, 0.52160791,
0.13226797, 0.65501363, 0.51966086,
0.13469183, 0.65863619, 0.5176488 ,
0.13733921, 0.66225157, 0.51557101,
0.14020991, 0.66585927, 0.5134268 ,
0.14330291, 0.66945881, 0.51121549,
0.1466164 , 0.67304968, 0.50893644,
0.15014782, 0.67663139, 0.5065889 ,
0.15389405, 0.68020343, 0.50417217,
0.15785146, 0.68376525, 0.50168574,
0.16201598, 0.68731632, 0.49912906,
0.1663832 , 0.69085611, 0.49650163,
0.1709484 , 0.69438405, 0.49380294,
0.17570671, 0.6978996 , 0.49103252,
0.18065314, 0.70140222, 0.48818938,
0.18578266, 0.70489133, 0.48527326,
0.19109018, 0.70836635, 0.48228395,
0.19657063, 0.71182668, 0.47922108,
0.20221902, 0.71527175, 0.47608431,
0.20803045, 0.71870095, 0.4728733 ,
0.21400015, 0.72211371, 0.46958774,
0.22012381, 0.72550945, 0.46622638,
0.2263969 , 0.72888753, 0.46278934,
0.23281498, 0.73224735, 0.45927675,
0.2393739 , 0.73558828, 0.45568838,
0.24606968, 0.73890972, 0.45202405,
0.25289851, 0.74221104, 0.44828355,
0.25985676, 0.74549162, 0.44446673,
0.26694127, 0.74875084, 0.44057284,
0.27414922, 0.75198807, 0.4366009 ,
0.28147681, 0.75520266, 0.43255207,
0.28892102, 0.75839399, 0.42842626,
0.29647899, 0.76156142, 0.42422341,
0.30414796, 0.76470433, 0.41994346,
0.31192534, 0.76782207, 0.41558638,
0.3198086 , 0.77091403, 0.41115215,
0.3277958 , 0.77397953, 0.40664011,
0.33588539, 0.7770179 , 0.40204917,
0.34407411, 0.78002855, 0.39738103,
0.35235985, 0.78301086, 0.39263579,
0.36074053, 0.78596419, 0.38781353,
0.3692142 , 0.78888793, 0.38291438,
0.37777892, 0.79178146, 0.3779385 ,
0.38643282, 0.79464415, 0.37288606,
0.39517408, 0.79747541, 0.36775726,
0.40400101, 0.80027461, 0.36255223,
0.4129135 , 0.80304099, 0.35726893,
0.42190813, 0.80577412, 0.35191009,
0.43098317, 0.80847343, 0.34647607,
0.44013691, 0.81113836, 0.3409673 ,
0.44936763, 0.81376835, 0.33538426,
0.45867362, 0.81636288, 0.32972749,
0.46805314, 0.81892143, 0.32399761,
0.47750446, 0.82144351, 0.31819529,
0.4870258 , 0.82392862, 0.31232133,
0.49661536, 0.82637633, 0.30637661,
0.5062713 , 0.82878621, 0.30036211,
0.51599182, 0.83115784, 0.29427888,
0.52577622, 0.83349064, 0.2881265 ,
0.5356211 , 0.83578452, 0.28190832,
0.5455244 , 0.83803918, 0.27562602,
0.55548397, 0.84025437, 0.26928147,
0.5654976 , 0.8424299 , 0.26287683,
0.57556297, 0.84456561, 0.25641457,
0.58567772, 0.84666139, 0.24989748,
0.59583934, 0.84871722, 0.24332878,
0.60604528, 0.8507331 , 0.23671214,
0.61629283, 0.85270912, 0.23005179,
0.62657923, 0.85464543, 0.22335258,
0.63690157, 0.85654226, 0.21662012,
0.64725685, 0.85839991, 0.20986086,
0.65764197, 0.86021878, 0.20308229,
0.66805369, 0.86199932, 0.19629307,
0.67848868, 0.86374211, 0.18950326,
0.68894351, 0.86544779, 0.18272455,
0.69941463, 0.86711711, 0.17597055,
0.70989842, 0.86875092, 0.16925712,
0.72039115, 0.87035015, 0.16260273,
0.73088902, 0.87191584, 0.15602894,
0.74138803, 0.87344918, 0.14956101,
0.75188414, 0.87495143, 0.14322828,
0.76237342, 0.87642392, 0.13706449,
0.77285183, 0.87786808, 0.13110864,
0.78331535, 0.87928545, 0.12540538,
0.79375994, 0.88067763, 0.12000532,
0.80418159, 0.88204632, 0.11496505,
0.81457634, 0.88339329, 0.11034678,
0.82494028, 0.88472036, 0.10621724,
0.83526959, 0.88602943, 0.1026459,
0.84556056, 0.88732243, 0.09970219,
0.8558096 , 0.88860134, 0.09745186,
0.86601325, 0.88986815, 0.09595277,
0.87616824, 0.89112487, 0.09525046,
0.88627146, 0.89237353, 0.09537439,
0.89632002, 0.89361614, 0.09633538,
0.90631121, 0.89485467, 0.09812496,
0.91624212, 0.89609127, 0.1007168,
0.92610579, 0.89732977, 0.10407067,
0.93590444, 0.8985704 , 0.10813094,
0.94563626, 0.899815  , 0.11283773,
0.95529972, 0.90106534, 0.11812832,
0.96489353, 0.90232311, 0.12394051,
0.97441665, 0.90358991, 0.13021494,
0.98386829, 0.90486726, 0.13689671,
0.99324789, 0.90615657, 0.1439362};

void map_to_viridis(float v,uint8_t& r,uint8_t& g,uint8_t& b)
{
	if(v>1)v=1;
	if(v<0)v=0;
	v*=255;
	int id=v;
	//TODO: lerp for more nice colors?
	r=viridis_map[id*3]*255;
	g=viridis_map[id*3+1]*255;
	b=viridis_map[id*3+2]*255;
}
#endif //VIRIDIS_IMPLEMENTATION