jet_color.h

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#ifndef HEDGEHOG_JET_COLOR_H
#define HEDGEHOG_JET_COLOR_H
 
#include <sstream>
#include <iomanip>
 
#include "options/color_picker.h"
 
namespace hh {
 
class JetColor : public ColorPicker {
 public:
  JetColor() = default;
 
  ~JetColor() override = default;
 
  std::string getRGBFromRange(std::chrono::nanoseconds const &value,
                              std::chrono::nanoseconds const &min,
                              std::chrono::nanoseconds const &range) override {
    double
        dVal = (double) value.count(), dMin = (double) min.count(), dRange = (double) range.count(),
        dR = 1, dG = 1, dB = 1;
 
    std::ostringstream oss;
 
    if (dVal < dMin + 0.25 * dRange) {
      dR = 0;
      dG = (4 * dVal - dMin) / dRange;
    } else if (dVal < (dMin + 0.5 * dRange)) {
      dR = 0;
      dB = 1 + 4 * (dMin + 0.25 * dRange - dVal) / dRange;
    } else if (dVal < (dMin + 0.75 * dRange)) {
      dR = 4 * (dVal - dMin - 0.5 * dRange) / dRange;
      dB = 0;
    } else {
      dG = 1 + 4 * (dMin + 0.75 * dRange - dVal) / dRange;
      dB = 0;
    }
 
    oss << "\"#"
        << std::setfill('0') << std::setw(2) << std::hex << (uint16_t) std::clamp(dR * 255, 0., 255.)
        << std::setfill('0') << std::setw(2) << std::hex << (uint16_t) std::clamp(dG * 255, 0., 255.)
        << std::setfill('0') << std::setw(2) << std::hex << (uint16_t) std::clamp(dB * 255, 0., 255.)
        << "\"";
 
    return oss.str();
  }
};
 
}
#endif //HEDGEHOG_JET_COLOR_H