color.hpp

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// Copyright 2024 Kotaro Uetake.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
#ifndef AWVIZ_PLUGIN__COLOR_HPP_
#define AWVIZ_PLUGIN__COLOR_HPP_
 
#include <rerun.hpp>
 
#include <algorithm>
#include <vector>
 
namespace awviz_plugin
{
constexpr float TurboBytes[256][3] = {
  {48, 18, 59},   {50, 21, 67},   {51, 24, 74},    {52, 27, 81},    {53, 30, 88},   {54, 33, 95},
  {55, 36, 102},  {56, 39, 109},  {57, 42, 115},   {58, 45, 121},   {59, 47, 128},  {60, 50, 134},
  {61, 53, 139},  {62, 56, 145},  {63, 59, 151},   {63, 62, 156},   {64, 64, 162},  {65, 67, 167},
  {65, 70, 172},  {66, 73, 177},  {66, 75, 181},   {67, 78, 186},   {68, 81, 191},  {68, 84, 195},
  {68, 86, 199},  {69, 89, 203},  {69, 92, 207},   {69, 94, 211},   {70, 97, 214},  {70, 100, 218},
  {70, 102, 221}, {70, 105, 224}, {70, 107, 227},  {71, 110, 230},  {71, 113, 233}, {71, 115, 235},
  {71, 118, 238}, {71, 120, 240}, {71, 123, 242},  {70, 125, 244},  {70, 128, 246}, {70, 130, 248},
  {70, 133, 250}, {70, 135, 251}, {69, 138, 252},  {69, 140, 253},  {68, 143, 254}, {67, 145, 254},
  {66, 148, 255}, {65, 150, 255}, {64, 153, 255},  {62, 155, 254},  {61, 158, 254}, {59, 160, 253},
  {58, 163, 252}, {56, 165, 251}, {55, 168, 250},  {53, 171, 248},  {51, 173, 247}, {49, 175, 245},
  {47, 178, 244}, {46, 180, 242}, {44, 183, 240},  {42, 185, 238},  {40, 188, 235}, {39, 190, 233},
  {37, 192, 231}, {35, 195, 228}, {34, 197, 226},  {32, 199, 223},  {31, 201, 221}, {30, 203, 218},
  {28, 205, 216}, {27, 208, 213}, {26, 210, 210},  {26, 212, 208},  {25, 213, 205}, {24, 215, 202},
  {24, 217, 200}, {24, 219, 197}, {24, 221, 194},  {24, 222, 192},  {24, 224, 189}, {25, 226, 187},
  {25, 227, 185}, {26, 228, 182}, {28, 230, 180},  {29, 231, 178},  {31, 233, 175}, {32, 234, 172},
  {34, 235, 170}, {37, 236, 167}, {39, 238, 164},  {42, 239, 161},  {44, 240, 158}, {47, 241, 155},
  {50, 242, 152}, {53, 243, 148}, {56, 244, 145},  {60, 245, 142},  {63, 246, 138}, {67, 247, 135},
  {70, 248, 132}, {74, 248, 128}, {78, 249, 125},  {82, 250, 122},  {85, 250, 118}, {89, 251, 115},
  {93, 252, 111}, {97, 252, 108}, {101, 253, 105}, {105, 253, 102}, {109, 254, 98}, {113, 254, 95},
  {117, 254, 92}, {121, 254, 89}, {125, 255, 86},  {128, 255, 83},  {132, 255, 81}, {136, 255, 78},
  {139, 255, 75}, {143, 255, 73}, {146, 255, 71},  {150, 254, 68},  {153, 254, 66}, {156, 254, 64},
  {159, 253, 63}, {161, 253, 61}, {164, 252, 60},  {167, 252, 58},  {169, 251, 57}, {172, 251, 56},
  {175, 250, 55}, {177, 249, 54}, {180, 248, 54},  {183, 247, 53},  {185, 246, 53}, {188, 245, 52},
  {190, 244, 52}, {193, 243, 52}, {195, 241, 52},  {198, 240, 52},  {200, 239, 52}, {203, 237, 52},
  {205, 236, 52}, {208, 234, 52}, {210, 233, 53},  {212, 231, 53},  {215, 229, 53}, {217, 228, 54},
  {219, 226, 54}, {221, 224, 55}, {223, 223, 55},  {225, 221, 55},  {227, 219, 56}, {229, 217, 56},
  {231, 215, 57}, {233, 213, 57}, {235, 211, 57},  {236, 209, 58},  {238, 207, 58}, {239, 205, 58},
  {241, 203, 58}, {242, 201, 58}, {244, 199, 58},  {245, 197, 58},  {246, 195, 58}, {247, 193, 58},
  {248, 190, 57}, {249, 188, 57}, {250, 186, 57},  {251, 184, 56},  {251, 182, 55}, {252, 179, 54},
  {252, 177, 54}, {253, 174, 53}, {253, 172, 52},  {254, 169, 51},  {254, 167, 50}, {254, 164, 49},
  {254, 161, 48}, {254, 158, 47}, {254, 155, 45},  {254, 153, 44},  {254, 150, 43}, {254, 147, 42},
  {254, 144, 41}, {253, 141, 39}, {253, 138, 38},  {252, 135, 37},  {252, 132, 35}, {251, 129, 34},
  {251, 126, 33}, {250, 123, 31}, {249, 120, 30},  {249, 117, 29},  {248, 114, 28}, {247, 111, 26},
  {246, 108, 25}, {245, 105, 24}, {244, 102, 23},  {243, 99, 21},   {242, 96, 20},  {241, 93, 19},
  {240, 91, 18},  {239, 88, 17},  {237, 85, 16},   {236, 83, 15},   {235, 80, 14},  {234, 78, 13},
  {232, 75, 12},  {231, 73, 12},  {229, 71, 11},   {228, 69, 10},   {226, 67, 10},  {225, 65, 9},
  {223, 63, 8},   {221, 61, 8},   {220, 59, 7},    {218, 57, 7},    {216, 55, 6},   {214, 53, 6},
  {212, 51, 5},   {210, 49, 5},   {208, 47, 5},    {206, 45, 4},    {204, 43, 4},   {202, 42, 4},
  {200, 40, 3},   {197, 38, 3},   {195, 37, 3},    {193, 35, 2},    {190, 33, 2},   {188, 32, 2},
  {185, 30, 2},   {183, 29, 2},   {180, 27, 1},    {178, 26, 1},    {175, 24, 1},   {172, 23, 1},
  {169, 22, 1},   {167, 20, 1},   {164, 19, 1},    {161, 18, 1},    {158, 16, 1},   {155, 15, 1},
  {152, 14, 1},   {149, 13, 1},   {146, 11, 1},    {142, 10, 1},    {139, 9, 2},    {136, 8, 2},
  {133, 7, 2},    {129, 6, 2},    {126, 5, 2},     {122, 4, 3}};
 
inline std::vector<rerun::Color> colormap(const std::vector<float> & values)
{
  float min_value = *std::min_element(values.cbegin(), values.cend());
  float max_value = *std::max_element(values.cbegin(), values.cend());
 
  std::vector<rerun::Color> colors;
 
  for (const auto & value : values) {
    auto idx = static_cast<size_t>(255 * (value - min_value) / (max_value - min_value));
    colors.emplace_back(rerun::Color(TurboBytes[idx][0], TurboBytes[idx][1], TurboBytes[idx][2]));
  }
  return colors;
}
}  // namespace awviz_plugin
 
#endif  // AWVIZ_PLUGIN__COLOR_HPP_