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diff --git a/examples/datavisualization/rotations/scatterdatamodifier.cpp b/examples/datavisualization/rotations/scatterdatamodifier.cpp
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-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the Qt Data Visualization module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:GPL$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 3 or (at your option) any later version
-** approved by the KDE Free Qt Foundation. The licenses are as published by
-** the Free Software Foundation and appearing in the file LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-3.0.html.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#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 <QtDataVisualization/QCustom3DItem>
-#include <QtCore/qmath.h>
-
-static const float verticalRange = 8.0f;
-static const float horizontalRange = verticalRange;
-static const float ellipse_a = horizontalRange / 3.0f;
-static const float ellipse_b = verticalRange;
-static const float doublePi = float(M_PI) * 2.0f;
-static const float radiansToDegrees = 360.0f / doublePi;
-static const float animationFrames = 30.0f;
-
-ScatterDataModifier::ScatterDataModifier(Q3DScatter *scatter)
- : m_graph(scatter),
- m_fieldLines(12),
- m_arrowsPerLine(16),
- m_magneticField(new QScatter3DSeries),
- m_sun(new QCustom3DItem),
- m_magneticFieldArray(0),
- m_angleOffset(0.0f),
- m_angleStep(doublePi / m_arrowsPerLine / animationFrames)
-{
- m_graph->setShadowQuality(QAbstract3DGraph::ShadowQualityNone);
- m_graph->scene()->activeCamera()->setCameraPreset(Q3DCamera::CameraPresetFront);
-
- // Magnetic field lines use custom narrow arrow
- m_magneticField->setItemSize(0.2f);
- //! [3]
- m_magneticField->setMesh(QAbstract3DSeries::MeshUserDefined);
- m_magneticField->setUserDefinedMesh(QStringLiteral(":/mesh/narrowarrow.obj"));
- //! [3]
- //! [4]
- QLinearGradient fieldGradient(0, 0, 16, 1024);
- fieldGradient.setColorAt(0.0, Qt::black);
- fieldGradient.setColorAt(1.0, Qt::white);
- m_magneticField->setBaseGradient(fieldGradient);
- m_magneticField->setColorStyle(Q3DTheme::ColorStyleRangeGradient);
- //! [4]
-
- // For 'sun' we use a custom large sphere
- m_sun->setScaling(QVector3D(0.07f, 0.07f, 0.07f));
- m_sun->setMeshFile(QStringLiteral(":/mesh/largesphere.obj"));
- QImage sunColor = QImage(2, 2, QImage::Format_RGB32);
- sunColor.fill(QColor(0xff, 0xbb, 0x00));
- m_sun->setTextureImage(sunColor);
-
- m_graph->addSeries(m_magneticField);
- m_graph->addCustomItem(m_sun);
-
- // Configure the axes according to the data
- m_graph->axisX()->setRange(-horizontalRange, horizontalRange);
- m_graph->axisY()->setRange(-verticalRange, verticalRange);
- m_graph->axisZ()->setRange(-horizontalRange, horizontalRange);
- m_graph->axisX()->setSegmentCount(int(horizontalRange));
- m_graph->axisZ()->setSegmentCount(int(horizontalRange));
-
- QObject::connect(&m_rotationTimer, &QTimer::timeout, this,
- &ScatterDataModifier::triggerRotation);
-
- toggleRotation();
- generateData();
-}
-
-ScatterDataModifier::~ScatterDataModifier()
-{
- delete m_graph;
-}
-
-void ScatterDataModifier::generateData()
-{
- // Reusing existing array is computationally cheaper than always generating new array, even if
- // all data items change in the array, if the array size doesn't change.
- if (!m_magneticFieldArray)
- m_magneticFieldArray = new QScatterDataArray;
-
- int arraySize = m_fieldLines * m_arrowsPerLine;
- if (arraySize != m_magneticFieldArray->size())
- m_magneticFieldArray->resize(arraySize);
-
- QScatterDataItem *ptrToDataArray = &m_magneticFieldArray->first();
-
- for (float i = 0; i < m_fieldLines; i++) {
- float horizontalAngle = (doublePi * i) / m_fieldLines;
- float xCenter = ellipse_a * qCos(horizontalAngle);
- float zCenter = ellipse_a * qSin(horizontalAngle);
-
- // Rotate - arrow always tangential to origin
- //! [0]
- QQuaternion yRotation = QQuaternion::fromAxisAndAngle(0.0f, 1.0f, 0.0f, horizontalAngle * radiansToDegrees);
- //! [0]
-
- for (float j = 0; j < m_arrowsPerLine; j++) {
- // Calculate point on ellipse centered on origin and parallel to x-axis
- float verticalAngle = ((doublePi * j) / m_arrowsPerLine) + m_angleOffset;
- float xUnrotated = ellipse_a * qCos(verticalAngle);
- float y = ellipse_b * qSin(verticalAngle);
-
- // Rotate the ellipse around y-axis
- float xRotated = xUnrotated * qCos(horizontalAngle);
- float zRotated = xUnrotated * qSin(horizontalAngle);
-
- // Add offset
- float x = xCenter + xRotated;
- float z = zCenter + zRotated;
-
- //! [1]
- QQuaternion zRotation = QQuaternion::fromAxisAndAngle(0.0f, 0.0f, 1.0f, verticalAngle * radiansToDegrees);
- QQuaternion totalRotation = yRotation * zRotation;
- //! [1]
-
- ptrToDataArray->setPosition(QVector3D(x, y, z));
- //! [2]
- ptrToDataArray->setRotation(totalRotation);
- //! [2]
- ptrToDataArray++;
- }
- }
-
- if (m_graph->selectedSeries() == m_magneticField)
- m_graph->clearSelection();
-
- m_magneticField->dataProxy()->resetArray(m_magneticFieldArray);
-}
-
-void ScatterDataModifier::setFieldLines(int lines)
-{
- m_fieldLines = lines;
- generateData();
-}
-
-void ScatterDataModifier::setArrowsPerLine(int arrows)
-{
- m_angleOffset = 0.0f;
- m_angleStep = doublePi / m_arrowsPerLine / animationFrames;
- m_arrowsPerLine = arrows;
- generateData();
-}
-
-void ScatterDataModifier::triggerRotation()
-{
- m_angleOffset += m_angleStep;
- generateData();
-}
-
-void ScatterDataModifier::toggleSun()
-{
- m_sun->setVisible(!m_sun->isVisible());
-}
-
-void ScatterDataModifier::toggleRotation()
-{
- if (m_rotationTimer.isActive())
- m_rotationTimer.stop();
- else
- m_rotationTimer.start(15);
-}