private double[] getDelta(TrackReading tr1, TrackReading tr2)
{
//find the change in tyre pressure respective to the change in track temperature
double[] r = { 0, 0, 0, 0 };
double tempDelta = tr1.trackTemp - tr2.trackTemp;
r[0] = (tr1.lf - tr2.lf) / tempDelta;
r[1] = (tr1.rf - tr2.rf) / tempDelta;
r[2] = (tr1.lr - tr2.lr) / tempDelta;
r[3] = (tr1.rr - tr2.rr) / tempDelta;
return(r);
}
private void btnAddReading_Click(object sender, EventArgs e)
{
btnSetStrats.Enabled = true;
btnAddReading.Enabled = false;
TrackReading tr = new TrackReading();
tr.trackTemp = Convert.ToInt32(udTrackTemp.Value);
tr.lf = Convert.ToDouble(udLf.Value);
tr.rf = Convert.ToDouble(udRf.Value);
tr.lr = Convert.ToDouble(udLr.Value);
tr.rr = Convert.ToDouble(udRr.Value);
trackReadings.Add(tr);
ListReadings();
generatePressures();
}
private void generatePressures()
{
//remove duplicate temps
int tMin = Convert.ToInt32(nudTmin.Value);
int tMax = Convert.ToInt32(nudTmax.Value);
if (trackReadings.Count > 1)
{
//create a temporary list, this will become our main list later
List <TrackReading> templist = new List <TrackReading>();
//first extrapolate for readings below the lowest entered reading if needed
if (trackReadings[0].trackTemp != tMin)
{
double[] delta01 = getDelta(trackReadings[0], trackReadings[1]);
for (int i = tMin; i < trackReadings[0].trackTemp; i++)
{
//if we're here then the lowest temp reading entered is > 21
//extrapolate from what data we have to populate readings down to 21c
int tyreDelta = trackReadings[0].trackTemp - i;
TrackReading tr = new TrackReading();
tr.trackTemp = i;
//get the expected pressures based on the rate of pressure change of closest known readings
//and the temperature difference from the closest reading
//newReading.tyre = reading[0].tyre - (tempdelta * tyreDelta)
//minus because we're going down in temp
tr.lf = Math.Round(trackReadings[0].lf - (delta01[0] * tyreDelta), 1);
tr.rf = Math.Round(trackReadings[0].rf - (delta01[1] * tyreDelta), 1);
tr.lr = Math.Round(trackReadings[0].lr - (delta01[2] * tyreDelta), 1);
tr.rr = Math.Round(trackReadings[0].rr - (delta01[3] * tyreDelta), 1);
templist.Add(tr);
}
}
//next populate readings within temps provided
//for each track reading except the last
for (int i = 0; i < trackReadings.Count - 1; i++)
{
//validate we're not working with the final temps & there is a gap between readings
if (trackReadings[i].trackTemp < tMax && (trackReadings[i + 1].trackTemp - trackReadings[i].trackTemp) > 1)
{
double[] delta = getDelta(trackReadings[i], trackReadings[i + 1]);
//create a reading for each degree between existing readings
for (int j = 0; j < (trackReadings[i + 1].trackTemp - trackReadings[i].trackTemp - 1); j++)
{
TrackReading tr = new TrackReading();
tr.trackTemp = trackReadings[i].trackTemp + j + 1;
tr.lf = Math.Round(trackReadings[i].lf + (delta[0] * (j + 1)), 1);
tr.rf = Math.Round(trackReadings[i].rf + (delta[1] * (j + 1)), 1);
tr.lr = Math.Round(trackReadings[i].lr + (delta[2] * (j + 1)), 1);
tr.rr = Math.Round(trackReadings[i].rr + (delta[3] * (j + 1)), 1);
templist.Add(tr);
}
}
}
//finaly extrapolate readings beyond the highest reading if that reading is not 42(max)
if (trackReadings[trackReadings.Count - 1].trackTemp != tMax)
{
double[] delta = getDelta(trackReadings[trackReadings.Count - 2], trackReadings[trackReadings.Count - 1]);
int j = 1;
for (int i = trackReadings[trackReadings.Count - 1].trackTemp + 1; i < tMax + 1; i++)
{
TrackReading tr = new TrackReading();
tr.trackTemp = i;
tr.lf = Math.Round(trackReadings[trackReadings.Count - 1].lf + (delta[0] * j), 1);
tr.rf = Math.Round(trackReadings[trackReadings.Count - 1].rf + (delta[1] * j), 1);
tr.lr = Math.Round(trackReadings[trackReadings.Count - 1].lr + (delta[2] * j), 1);
tr.rr = Math.Round(trackReadings[trackReadings.Count - 1].rr + (delta[3] * j), 1);
templist.Add(tr);
j++;
}
}
foreach (TrackReading r in trackReadings)
{
templist.Add(r);
}
autoReadings.Clear();
autoReadings.AddRange(templist);
updateGraph();
double[] iMin = { autoReadings.Last().lf, autoReadings.Last().lr, autoReadings.Last().rf, autoReadings.Last().rr };
double[] iMax = { autoReadings[0].lf, autoReadings[0].lr, autoReadings[0].rf, autoReadings[0].rr };
int min = Convert.ToInt32(Math.Floor(iMin.Min()));
int max = Convert.ToInt32(Math.Ceiling(iMax.Max()));
//MessageBox.Show($"min is {min} max is {max}");
chtPressures.ChartAreas[0].AxisY.Minimum = min;
chtPressures.ChartAreas[0].AxisY.Maximum = max;
//chtPressures.ChartAreas[0].AxisY.Minimum = Convert.ToDouble(Math.Ceiling())
}
}
