Scatter Example

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 #include "scatterdatamodifier.h"
 #include <QtDataVisualization/qscatterdataproxy.h>
 #include <QtDataVisualization/qvalue3daxis.h>
 #include <QtDataVisualization/q3dscene.h>
 #include <QtDataVisualization/q3dcamera.h>
 #include <QtDataVisualization/qscatter3dseries.h>
 #include <QtDataVisualization/q3dtheme.h>
 #include <QtCore/qmath.h>
 #include <QtCore/qrandom.h>
 #include <QtWidgets/QComboBox>

 using namespace QtDataVisualization;

 //#define RANDOM_SCATTER // Uncomment this to switch to random scatter

 const int numberOfItems = 3600;
 const float curveDivider = 3.0f;
 const int lowerNumberOfItems = 900;
 const float lowerCurveDivider = 0.75f;

 ScatterDataModifier::ScatterDataModifier(Q3DScatter *scatter)
     : m_graph(scatter),
       m_fontSize(40.0f),
       m_style(QAbstract3DSeries::MeshSphere),
       m_smooth(true),
       m_itemCount(lowerNumberOfItems),
       m_curveDivider(lowerCurveDivider)
 {
     m_graph->activeTheme()->setType(Q3DTheme::ThemeEbony);
     QFont font = m_graph->activeTheme()->font();
     font.setPointSize(m_fontSize);
     m_graph->activeTheme()->setFont(font);
     m_graph->setShadowQuality(QAbstract3DGraph::ShadowQualitySoftLow);
     m_graph->scene()->activeCamera()->setCameraPreset(Q3DCamera::CameraPresetFront);

     QScatterDataProxy *proxy = new QScatterDataProxy;
     QScatter3DSeries *series = new QScatter3DSeries(proxy);
     series->setItemLabelFormat(QStringLiteral("@xTitle: @xLabel @yTitle: @yLabel @zTitle: @zLabel"));
     series->setMeshSmooth(m_smooth);
     m_graph->addSeries(series);

     addData();
 }

 ScatterDataModifier::~ScatterDataModifier()
 {
     delete m_graph;
 }

 void ScatterDataModifier::addData()
 {
     // Configure the axes according to the data
     m_graph->axisX()->setTitle("X");
     m_graph->axisY()->setTitle("Y");
     m_graph->axisZ()->setTitle("Z");

     QScatterDataArray *dataArray = new QScatterDataArray;
     dataArray->resize(m_itemCount);
     QScatterDataItem *ptrToDataArray = &dataArray->first();

 #ifdef RANDOM_SCATTER
     for (int i = 0; i < m_itemCount; i++) {
         ptrToDataArray->setPosition(randVector());
         ptrToDataArray++;
     }
 #else
     float limit = qSqrt(m_itemCount) / 2.0f;
     for (float i = -limit; i < limit; i++) {
         for (float j = -limit; j < limit; j++) {
             ptrToDataArray->setPosition(QVector3D(i + 0.5f,
                                                   qCos(qDegreesToRadians((i * j) / m_curveDivider)),
                                                   j + 0.5f));
             ptrToDataArray++;
         }
     }
 #endif

     m_graph->seriesList().at(0)->dataProxy()->resetArray(dataArray);
 }

 void ScatterDataModifier::changeStyle(int style)
 {
     QComboBox *comboBox = qobject_cast<QComboBox *>(sender());
     if (comboBox) {
         m_style = QAbstract3DSeries::Mesh(comboBox->itemData(style).toInt());
         if (m_graph->seriesList().size())
             m_graph->seriesList().at(0)->setMesh(m_style);
     }
 }

 void ScatterDataModifier::setSmoothDots(int smooth)
 {
     m_smooth = bool(smooth);
     QScatter3DSeries *series = m_graph->seriesList().at(0);
     series->setMeshSmooth(m_smooth);
 }

 void ScatterDataModifier::changeTheme(int theme)
 {
     Q3DTheme *currentTheme = m_graph->activeTheme();
     currentTheme->setType(Q3DTheme::Theme(theme));
     emit backgroundEnabledChanged(currentTheme->isBackgroundEnabled());
     emit gridEnabledChanged(currentTheme->isGridEnabled());
     emit fontChanged(currentTheme->font());
 }

 void ScatterDataModifier::changePresetCamera()
 {
     static int preset = Q3DCamera::CameraPresetFrontLow;

     m_graph->scene()->activeCamera()->setCameraPreset((Q3DCamera::CameraPreset)preset);

     if (++preset > Q3DCamera::CameraPresetDirectlyBelow)
         preset = Q3DCamera::CameraPresetFrontLow;
 }

 void ScatterDataModifier::changeLabelStyle()
 {
     m_graph->activeTheme()->setLabelBackgroundEnabled(!m_graph->activeTheme()->isLabelBackgroundEnabled());
 }

 void ScatterDataModifier::changeFont(const QFont &font)
 {
     QFont newFont = font;
     newFont.setPointSizeF(m_fontSize);
     m_graph->activeTheme()->setFont(newFont);
 }

 void ScatterDataModifier::shadowQualityUpdatedByVisual(QAbstract3DGraph::ShadowQuality sq)
 {
     int quality = int(sq);
     emit shadowQualityChanged(quality); // connected to a checkbox in main.cpp
 }

 void ScatterDataModifier::changeShadowQuality(int quality)
 {
     QAbstract3DGraph::ShadowQuality sq = QAbstract3DGraph::ShadowQuality(quality);
     m_graph->setShadowQuality(sq);
 }

 void ScatterDataModifier::setBackgroundEnabled(int enabled)
 {
     m_graph->activeTheme()->setBackgroundEnabled((bool)enabled);
 }

 void ScatterDataModifier::setGridEnabled(int enabled)
 {
     m_graph->activeTheme()->setGridEnabled((bool)enabled);
 }

 void ScatterDataModifier::toggleItemCount()
 {
     if (m_itemCount == numberOfItems) {
         m_itemCount = lowerNumberOfItems;
         m_curveDivider = lowerCurveDivider;
     } else {
         m_itemCount = numberOfItems;
         m_curveDivider = curveDivider;
     }
     m_graph->seriesList().at(0)->dataProxy()->resetArray(0);
     addData();
 }

 QVector3D ScatterDataModifier::randVector()
 {
     return QVector3D(
                 (float)(QRandomGenerator::global()->bounded(100)) / 2.0f -
                 (float)(QRandomGenerator::global()->bounded(100)) / 2.0f,
                 (float)(QRandomGenerator::global()->bounded(100)) / 100.0f -
                 (float)(QRandomGenerator::global()->bounded(100)) / 100.0f,
                 (float)(QRandomGenerator::global()->bounded(100)) / 2.0f -
                 (float)(QRandomGenerator::global()->bounded(100)) / 2.0f);
 }