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Derive Slope Data

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- If Alt data present then calculate slope
- Smooth the slope data after calculation
This commit is contained in:
Jon Beverley
2014-07-30 16:33:57 +01:00
parent b2df92cbc6
commit 528d880a90
1 changed files with 33 additions and 0 deletions
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33
src/RideFile.cpp
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@@ -1363,6 +1363,21 @@ RideFile::recalculateDerivedSeries()
p->antiss = anTISS;
}
// Slope
// If there is no slope data then it can be derived
// from distanct and altitude
if (lastP) {
if (!dataPresent.slope && dataPresent.alt && dataPresent.km) {
double deltaDistance = (p->km - lastP->km) * 1000;
double deltaAltitude = p->alt - lastP->alt;
if (deltaDistance>0) {
p->slope = (deltaAltitude / deltaDistance) * 100;
} else {
p->slope = 0;
}
}
}
// last point
lastP = p;
}
@@ -1377,6 +1392,24 @@ RideFile::recalculateDerivedSeries()
avgPoint->apower = APcount ? (APtotal / APcount) : 0;
totalPoint->apower = APtotal;
// Smooth the slope if it has been derived
if (!dataPresent.slope && dataPresent.alt && dataPresent.km) {
// initialise rolling average
double rtot = 0;
for (int i=10; i>0 && dataPoints_.length()-i >=0; i--) {
rtot += dataPoints_[dataPoints_.length()-i]->slope;
}
// now run backwards setting the rolling average
for (int i=dataPoints_.length()-1; i>=10; i--) {
double here = dataPoints_[i]->slope;
dataPoints_[i]->slope = rtot / 10;
rtot -= here;
rtot += dataPoints_[i-10]->slope;
}
setDataPresent(slope, true);
}
// and we're done
dstale=false;
}