Method Base

src/colmap/sensor/bitmap.cc:771–784

float JetColormap::Blue(const float gray) { return Base(gray + 0.25f); }

float JetColormap::Base(const float val) {
  // NOLINTNEXTLINE(bugprone-branch-clone)
  if (val <= 0.125f) {
    return 0.0f;
  } else if (val <= 0.375f) {
    return Interpolate(2.0f * val - 1.0f, 0.0f, -0.75f, 1.0f, -0.25f);
  } else if (val <= 0.625f) {
    return 1.0f;
  } else if (val <= 0.87f) {
    return Interpolate(2.0f * val - 1.0f, 1.0f, 0.25f, 0.0f, 0.75f);
  } else {
    return 0.0f;
  }
}

float JetColormap::Interpolate(const float val,
                               const float y0,