Good day, I'm trying to plot a color map (see the part of the code below), but the plotted data doesn't match the colorgradient somehow, what could be a problem?
int nx=55, ny=25;
customPlot->axisRect()->setupFullAxesBox(true);
customPlot->yAxis->setLabel("Y, cm");
customPlot->xAxis->setLabel("X, cm");
customPlot->xAxis->setRange(-3500, 2000);
customPlot->yAxis->setRange(-500, 2000);
QCPColorMap *Colormap = new QCPColorMap (customPlot-> xAxis, customPlot-> yAxis);
Colormap-> data () -> setSize (nx, ny);
Colormap-> data () -> setRange (QCPRange (-3500 + 50, 1900 + 50), QCPRange (-500 + 50, 1900 + 50));
Colormap-> setInterpolate (false);
Colormap-> setTightBoundary(false);
for (int y = 0; y < ny; ++y)
{
for (int x = 0; x < nx; ++x)
{
double z = QRandomGenerator::global()->generateDouble();
if (z) Colormap-> data () -> setCell (x, y, z*1e5);
else Colormap-> data () -> setAlpha (x, y, 0);
}
}
QCPColorScale *colorScale = new QCPColorScale (customPlot);
colorScale-> setType (QCPAxis :: atBottom);
customPlot-> plotLayout () -> addElement (1, 0, colorScale);
QCPRange range(1e-4,1e7);
colorScale->axis()->setRange(range);
colorScale->axis()->setScaleType (QCPAxis::stLogarithmic );
colorScale->axis()->setNumberPrecision(0);
colorScale->axis()->setNumberFormat("eb");
QCPColorGradient gradient;
QVector<QColor> mycolorsset1; mycolorsset1.append(QColor(255, 255, 255)); mycolorsset1.append(QColor(253, 105, 253));
mycolorsset1.append(QColor(181, 0, 255));mycolorsset1.append(QColor(6, 0, 204)); mycolorsset1.append(QColor(0, 147, 255));
mycolorsset1.append(QColor(0, 179, 132));mycolorsset1.append(QColor(124, 254, 1));mycolorsset1.append(QColor(254, 255, 0));
mycolorsset1.append(QColor(255, 129, 0));mycolorsset1.append(QColor(204, 0, 0));mycolorsset1.append(QColor(0, 0, 0));
gradient.clearColorStops();gradient.setLevelCount(11);
for(qint16 i=1;i<12;++i)
{
if(i==1) {gradient.setColorStopAt(0, mycolorsset1[i-1]);gradient.setColorStopAt((double)i/11, mycolorsset1[i-1]);}
else if(i<mycolorsset1.length()) {gradient.setColorStopAt((double)(i-1)/11+1e-12, mycolorsset1[i-1]);gradient.setColorStopAt((double)i/11-1e-12, mycolorsset1[i-1]);}
else {gradient.setColorStopAt((double)(i-1)/11, mycolorsset1[i-1]);gradient.setColorStopAt(1, mycolorsset1[i-1]);}
}
Colormap->setColorScale(colorScale);
Colormap->setGradient(gradient);
QSharedPointer<QCPAxisTickerLog> logTicker(new QCPAxisTickerLog);
colorScale->axis()->setTicker(logTicker);
logTicker->setTickCount(11);
//
QCPMarginGroup *marginGroup = new QCPMarginGroup(customPlot);
customPlot->axisRect()->setMarginGroup(QCP::msLeft | QCP::msRight, marginGroup);
colorScale->setMarginGroup(QCP::msLeft | QCP::msRight, marginGroup);