Function signClampedRange

app/src/UI/Widgets/Plot.cpp:725–732

* @brief Reports whether a configured plot range hard-clamps the data into one sign, * so the samples cannot be bipolar and the per-frame scan can be skipped. A * degenerate range (pltMin == pltMax, including both zero) auto-scales instead, * so it is not a clamp. */

 *        so it is not a clamp.
 */
static bool signClampedRange(const DataModel::Dataset& dataset)
{
  if (!DSP::notEqual(dataset.pltMin, dataset.pltMax))
    return false;

  return (dataset.pltMin >= 0.0 && dataset.pltMax >= 0.0)
      || (dataset.pltMin <= 0.0 && dataset.pltMax <= 0.0);
}

/**
 * @brief Refreshes the finite Y extremes that drive the area fill's bipolarity from