color on q3dsurface only shows when zooming in

stevereine

I've drawn a simple Q3DSurface. All seems to work OK, except the color only appears when I right click, mouse wheel zoom in, as close as I can to the surface. This is true for a solid color or a linear gradient. I've been through the Q3DSurface example line by line (the example works fine, I see the color immediately when I run the app) and I can't see anything significant that I think would cause this behavior. Can someone point out what I may be dong wrong? Note that the variable 'graph' is a Q3DSurface object.

m_dataProxy = new QSurfaceDataProxy();
m_dataSeries = new QSurface3DSeries(m_dataProxy);

m_dataSeries->setDrawMode(QSurface3DSeries::DrawSurfaceAndWireframe);
m_dataSeries->setFlatShadingEnabled(false);
graph->addSeries(m_dataSeries);    

QLinearGradient gr;
gr.setColorAt(0.0, Qt::darkGreen);
gr.setColorAt(0.5, Qt::yellow);
gr.setColorAt(0.8, Qt::red);
gr.setColorAt(1.0, Qt::darkRed);

graph->activeTheme()->setType(Q3DTheme::ThemeQt);
//graph->seriesList().at(0)->setBaseGradient(gr);
//graph->seriesList().at(0)->setColorStyle(Q3DTheme::ColorStyleRangeGradient);

QSurfaceDataArray *dataArray = new QSurfaceDataArray;
dataArray->reserve(100);

QSurfaceDataRow *tempRow1 = new QSurfaceDataRow(100);
QSurfaceDataRow *tempRow2 = new QSurfaceDataRow(100);
QSurfaceDataRow *tempRow3 = new QSurfaceDataRow(100);

for (int i = 0 ; i < 100 ; i++)
{
(*tempRow1)[99-i].setPosition(QVector3D(i,1.0f,-50.0f));
(*tempRow2)[99-i].setPosition(QVector3D(i,3.0f,0.0f));
(*tempRow3)[99-i].setPosition(QVector3D(i,5.0f,50.0f));
}

*dataArray << tempRow1;
*dataArray << tempRow2;
*dataArray << tempRow3;

m_dataProxy->resetArray(dataArray);

graph->show();

stevereine

@stevereine

I solved my own problem, was drawing the graph in a Window, but not using a container to do it. It kind of works, but not very good. Always best to thoroughly understand the instructions before writing code. All is now working very well!