Code refactoring: use two different function to compute frequency by RPM and PSD by RPM

Author: demvlad

src/graph_spectrum.js

@@ -139,7 +139,7 @@ export function FlightLogAnalyser(flightLog, canvas, analyserCanvas) {
           break;
 
         case SPECTRUM_TYPE.PSD_VS_RPM:
-          fftData = GraphSpectrumCalc.dataLoadFrequencyVsRpm(true);
+          fftData = GraphSpectrumCalc.dataLoadPowerSpectralDensityVsRpm();
           break;
 
         case SPECTRUM_TYPE.PIDERROR_VS_SETPOINT:

src/graph_spectrum_calc.js

@@ -306,9 +306,15 @@ GraphSpectrumCalc.dataLoadPowerSpectralDensityVsThrottle = function() {
   return this._dataLoadPowerSpectralDensityVsX(FIELD_THROTTLE_NAME, 0, 100);
 };
 
-GraphSpectrumCalc.dataLoadFrequencyVsRpm = function(drawPSD = false) {
-  const fftData = drawPSD ? this._dataLoadPowerSpectralDensityVsX(FIELD_RPM_NAMES, 0) :
-                            this._dataLoadFrequencyVsX(FIELD_RPM_NAMES, 0);
+GraphSpectrumCalc.dataLoadFrequencyVsRpm = function() {
+  const fftData = this._dataLoadFrequencyVsX(FIELD_RPM_NAMES, 0);
+  fftData.vsRange.max *= 3.333 / this._motorPoles;
+  fftData.vsRange.min *= 3.333 / this._motorPoles;
+  return fftData;
+};
+
+GraphSpectrumCalc.dataLoadPowerSpectralDensityVsRpm = function() {
+  const fftData = this._dataLoadPowerSpectralDensityVsX(FIELD_RPM_NAMES, 0);
   fftData.vsRange.max *= 3.333 / this._motorPoles;
   fftData.vsRange.min *= 3.333 / this._motorPoles;
   return fftData;