void WindPlot::updatePlot()
{
clearPlottables();
clearItems();
// Return now if plot empty
if (mMainWindow->dataSize() == 0) return;
double lower = mMainWindow->rangeLower();
double upper = mMainWindow->rangeUpper();
QVector< double > t, x, y;
double xMin, xMax;
double yMin, yMax;
int start = mMainWindow->findIndexBelowT(lower) + 1;
int end = mMainWindow->findIndexAboveT(upper);
bool first = true;
for (int i = start; i < end; ++i)
{
const DataPoint &dp = mMainWindow->dataPoint(i);
t.append(dp.t);
if (mMainWindow->units() == PlotValue::Metric)
{
x.append(dp.velE * MPS_TO_KMH);
y.append(dp.velN * MPS_TO_KMH);
}
else
{
x.append(dp.velE * MPS_TO_MPH);
y.append(dp.velN * MPS_TO_MPH);
}
if (first)
{
xMin = xMax = x.back();
yMin = yMax = y.back();
first = false;
}
else
{
if (x.back() < xMin) xMin = x.back();
if (x.back() > xMax) xMax = x.back();
if (y.back() < yMin) yMin = y.back();
if (y.back() > yMax) yMax = y.back();
}
}
QCPCurve *curve = new QCPCurve(xAxis, yAxis);
curve->setData(t, x, y);
curve->setPen(QPen(Qt::lightGray, mMainWindow->lineThickness()));
setViewRange(xMin, xMax, yMin, yMax);
if (mMainWindow->markActive())
{
const DataPoint &dpEnd = mMainWindow->interpolateDataT(mMainWindow->markEnd());
t.clear();
x.clear();
y.clear();
QVector< double > xMark, yMark;
if (mMainWindow->units() == PlotValue::Metric)
{
xMark.append(dpEnd.velE * MPS_TO_KMH);
yMark.append(dpEnd.velN * MPS_TO_KMH);
}
else
{
xMark.append(dpEnd.velE * MPS_TO_MPH);
yMark.append(dpEnd.velN * MPS_TO_MPH);
}
QCPGraph *graph = addGraph();
graph->setData(xMark, yMark);
graph->setPen(QPen(Qt::black, mMainWindow->lineThickness()));
graph->setLineStyle(QCPGraph::lsNone);
graph->setScatterStyle(QCPScatterStyle::ssDisc);
}
updateWind(start, end);
QVector< double > xMark, yMark;
if (mMainWindow->units() == PlotValue::Metric)
{
xMark.append(mWindE * MPS_TO_KMH);
yMark.append(mWindN * MPS_TO_KMH);
}
else
{
xMark.append(mWindE * MPS_TO_MPH);
yMark.append(mWindN * MPS_TO_MPH);
}
QCPGraph *graph = addGraph();
graph->setData(xMark, yMark);
graph->setPen(QPen(Qt::red, mMainWindow->lineThickness()));
graph->setLineStyle(QCPGraph::lsNone);
graph->setScatterStyle(QCPScatterStyle::ssDisc);
const double x0 = mWindE;
const double y0 = mWindN;
const double r = mVelAircraft;
QVector< double > tCircle, xCircle, yCircle;
for (int i = 0; i <= 100; ++i)
{
tCircle.append(i);
const double x = x0 + r * cos((double) i / 100 * 2 * M_PI);
const double y = y0 + r * sin((double) i / 100 * 2 * M_PI);
if (mMainWindow->units() == PlotValue::Metric)
{
xCircle.append(x * MPS_TO_KMH);
yCircle.append(y * MPS_TO_KMH);
}
else
{
xCircle.append(x * MPS_TO_MPH);
yCircle.append(y * MPS_TO_MPH);
}
}
curve = new QCPCurve(xAxis, yAxis);
curve->setData(tCircle, xCircle, yCircle);
curve->setPen(QPen(Qt::red, mMainWindow->lineThickness()));
// Add label to show best fit
QCPItemText *textLabel = new QCPItemText(this);
const double factor = (mMainWindow->units() == PlotValue::Metric) ? MPS_TO_KMH : MPS_TO_MPH;
const QString units = (mMainWindow->units() == PlotValue::Metric) ? "km/h" : "mph";
double direction = atan2(-mWindE, -mWindN) / M_PI * 180.0;
if (direction < 0) direction += 360.0;
QPainter painter(this);
double mmPerPix = (double) painter.device()->widthMM() / painter.device()->width();
double xRatioPerPix = 1.0 / axisRect()->width();
double xRatioPerMM = xRatioPerPix / mmPerPix;
double yRatioPerPix = 1.0 / axisRect()->height();
double yRatioPerMM = yRatioPerPix / mmPerPix;
textLabel->setPositionAlignment(Qt::AlignBottom|Qt::AlignRight);
textLabel->setTextAlignment(Qt::AlignRight);
textLabel->position->setType(QCPItemPosition::ptAxisRectRatio);
textLabel->position->setCoords(1 - 5 * xRatioPerMM,
1 - 5 * yRatioPerMM);
textLabel->setText(
QString("Wind speed = %1 %2\nWind direction = %3 deg\nAircraft speed = %4 %5")
.arg(sqrt(mWindE * mWindE + mWindN * mWindN) * factor)
.arg(units)
.arg(direction)
.arg(mVelAircraft * factor)
.arg(units));
replot();
}
void MainWindow::labelItemAnchors(QCPAbstractItem *item, double fontSize, bool circle, bool labelBelow)
{
QList<QCPItemAnchor*> anchors = item->anchors();
for (int i=0; i<anchors.size(); ++i)
{
if (circle)
{
QCPItemEllipse *circ = new QCPItemEllipse(item->parentPlot());
item->parentPlot()->addItem(circ);
circ->topLeft->setParentAnchor(anchors.at(i));
circ->bottomRight->setParentAnchor(anchors.at(i));
circ->topLeft->setCoords(-4, -4);
circ->bottomRight->setCoords(4, 4);
QPen p(Qt::blue, 0, Qt::CustomDashLine);
#if (QT_VERSION >= QT_VERSION_CHECK(4, 8, 0)) // Qt 4.8 changed the meaning of this completely...
p.setDashPattern(QVector<qreal>()<<2<<1);
#else
p.setDashPattern(QVector<qreal>()<<1<<3);
#endif
circ->setPen(p);
if (dynamic_cast<QCPItemPosition*>(anchors.at(i)))
{
QCPItemEllipse *circ2 = new QCPItemEllipse(item->parentPlot());
item->parentPlot()->addItem(circ2);
circ2->topLeft->setParentAnchor(anchors.at(i));
circ2->bottomRight->setParentAnchor(anchors.at(i));
circ2->topLeft->setCoords(-2.5, -2.5);
circ2->bottomRight->setCoords(2.5, 2.5);
circ2->setPen(Qt::NoPen);
circ2->setBrush(Qt::blue);
}
}
if (fontSize > 0)
{
QCPItemText *label = new QCPItemText(item->parentPlot());
item->parentPlot()->addItem(label);
label->setFont(QFont(font().family(), fontSize));
label->setColor(Qt::blue);
label->setText(QString("%2 (%1)").arg(i).arg(anchors.at(i)->name()));
label->position->setParentAnchor(anchors.at(i));
if (circle)
label->position->setCoords(0, fontSize*2*(labelBelow?1:-1));
else
label->position->setCoords(0, 0);
label->setTextAlignment(Qt::AlignCenter);
}
}
}
void LiftDragPlot::updatePlot()
{
clearPlottables();
clearItems();
xAxis->setLabel(tr("Drag Coefficient"));
yAxis->setLabel(tr("Lift Coefficient"));
double lower = mMainWindow->rangeLower();
double upper = mMainWindow->rangeUpper();
QVector< double > t, x, y;
double xMin, xMax;
double yMin, yMax;
int start = mMainWindow->findIndexBelowT(lower) + 1;
int end = mMainWindow->findIndexAboveT(upper);
double s10 = 0, s01 = 0, s20 = 0, s11 = 0;
double s21 = 0, s30 = 0, s40 = 0;
bool first = true;
for (int i = start; i < end; ++i)
{
const DataPoint &dp = mMainWindow->dataPoint(i);
t.append(dp.t);
x.append(dp.drag);
y.append(dp.lift);
if (first)
{
xMax = x.back();
yMax = y.back();
first = false;
}
else
{
if (x.back() > xMax) xMax = x.back();
if (y.back() > yMax) yMax = y.back();
}
s10 += dp.lift;
s01 += dp.drag;
s20 += dp.lift * dp.lift;
s11 += dp.lift * dp.drag;
s21 += dp.lift * dp.lift * dp.drag;
s30 += dp.lift * dp.lift * dp.lift;
s40 += dp.lift * dp.lift * dp.lift * dp.lift;
}
QCPCurve *curve = new QCPCurve(xAxis, yAxis);
curve->setData(t, x, y);
curve->setPen(QPen(Qt::lightGray, mMainWindow->lineThickness()));
curve->setLineStyle(QCPCurve::lsNone);
curve->setScatterStyle(QCPScatterStyle::ssDisc);
addPlottable(curve);
setViewRange(xMax, yMax);
// Update plot limits
xMin = xAxis->range().lower;
xMax = xAxis->range().upper;
yMin = yAxis->range().lower;
yMax = yAxis->range().upper;
if (mMainWindow->markActive())
{
int i1 = mMainWindow->findIndexBelowT(mMainWindow->markEnd()) + 1;
int i2 = mMainWindow->findIndexAboveT(mMainWindow->markEnd()) - 1;
const DataPoint &dp1 = mMainWindow->dataPoint(i1);
const DataPoint &dp2 = mMainWindow->dataPoint(i2);
QVector< double > xMark, yMark;
if (mMainWindow->markEnd() - dp1.t < dp2.t - mMainWindow->markEnd())
{
xMark.append(dp1.drag);
yMark.append(dp1.lift);
}
else
{
xMark.append(dp2.drag);
yMark.append(dp2.lift);
}
QCPGraph *graph = addGraph();
graph->setData(xMark, yMark);
graph->setPen(QPen(Qt::black, mMainWindow->lineThickness()));
graph->setLineStyle(QCPGraph::lsNone);
graph->setScatterStyle(QCPScatterStyle::ssDisc);
}
// x = ay^2 + c
const double m = 1 / mMainWindow->maxLD();
const double c = mMainWindow->minDrag();
const double a = m * m / (4 * c);
// Draw tangent line
const double yt = sqrt(c / a);
if (a != 0)
{
x.clear();
y.clear();
x << m * yMin << m * yMax;
y << yMin << yMax;
QCPGraph *graph = addGraph();
graph->setData(x, y);
graph->setPen(QPen(Qt::blue, mMainWindow->lineThickness(), Qt::DashLine));
}
// Draw minimum drag
x.clear();
y.clear();
x << mMainWindow->minDrag() << mMainWindow->minDrag();
y << yMin << yMax;
QCPGraph *graph = addGraph();
graph->setData(x, y);
graph->setPen(QPen(Qt::blue, mMainWindow->lineThickness(), Qt::DashLine));
// Draw maximum lift
x.clear();
y.clear();
x << xMin << xMax;
y << mMainWindow->maxLift() << mMainWindow->maxLift();
graph = addGraph();
graph->setData(x, y);
graph->setPen(QPen(Qt::blue, mMainWindow->lineThickness(), Qt::DashLine));
// Draw saved curve
t.clear();
x.clear();
y.clear();
for (int i = 0; i <= 100; ++i)
{
const double yy = yMin + (yMax - yMin) / 100 * i;
t.append(yy);
x.append(a * yy * yy + c);
y.append(yy);
}
curve = new QCPCurve(xAxis, yAxis);
curve->setData(t, x, y);
curve->setPen(QPen(Qt::red, mMainWindow->lineThickness()));
addPlottable(curve);
// Draw dot at maximum L/D
x.clear();
y.clear();
x << a * yt * yt + c;
y << yt;
graph = addGraph();
graph->setData(x, y);
graph->setPen(QPen(Qt::red, mMainWindow->lineThickness()));
graph->setLineStyle(QCPGraph::lsNone);
graph->setScatterStyle(QCPScatterStyle::ssDisc);
// Add label to show equation for saved curve
QCPItemText *textLabel = new QCPItemText(this);
addItem(textLabel);
QPainter painter(this);
double mmPerPix = (double) painter.device()->widthMM() / painter.device()->width();
double xRatioPerPix = 1.0 / axisRect()->width();
double xRatioPerMM = xRatioPerPix / mmPerPix;
double yRatioPerPix = 1.0 / axisRect()->height();
double yRatioPerMM = yRatioPerPix / mmPerPix;
textLabel->setPositionAlignment(Qt::AlignBottom|Qt::AlignRight);
textLabel->setTextAlignment(Qt::AlignRight);
textLabel->position->setType(QCPItemPosition::ptAxisRectRatio);
textLabel->position->setCoords(1 - 5 * xRatioPerMM,
1 - 5 * yRatioPerMM);
textLabel->setText(
QString("Minimum drag = %1\nMaximum lift = %2\nMaximum L/D = %3")
.arg(fabs(c))
.arg(mMainWindow->maxLift())
.arg(1/ m));
replot();
}