| /**************************************************************************** |
| ** |
| ** 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 |
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| ** 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 "datasource.h" |
| #include <QtCore/qmath.h> |
| #include <QtGui/QRgb> |
| #include <QtGui/QVector3D> |
| |
| using namespace QtDataVisualization; |
| |
| Q_DECLARE_METATYPE(QCustom3DVolume *) |
| |
| DataSource::DataSource(QObject *parent) : |
| QObject(parent) |
| { |
| qRegisterMetaType<QCustom3DVolume *>(); |
| } |
| |
| DataSource::~DataSource() |
| { |
| } |
| |
| void DataSource::fillVolume(QCustom3DVolume *volumeItem) |
| { |
| // Generate example texture data for an half-ellipsoid with a section missing. |
| // This can take a while if the dimensions are large, so we support incremental data generation. |
| |
| int index = 0; |
| int textureSize = 256; |
| QVector3D midPoint(float(textureSize) / 2.0f, |
| float(textureSize) / 2.0f, |
| float(textureSize) / 2.0f); |
| |
| QVector<uchar> *textureData = new QVector<uchar>(textureSize * textureSize * textureSize / 2); |
| for (int i = 0; i < textureSize; i++) { |
| for (int j = 0; j < textureSize / 2; j++) { |
| for (int k = 0; k < textureSize; k++) { |
| int colorIndex = 0; |
| // Take a section out of the ellipsoid |
| if (i >= textureSize / 2 || j >= textureSize / 4 || k >= textureSize / 2) { |
| QVector3D distVec = QVector3D(float(k), float(j * 2), float(i)) - midPoint; |
| float adjLen = qMin(255.0f, (distVec.length() * 512.0f / float(textureSize))); |
| colorIndex = 255 - int(adjLen); |
| } |
| |
| (*textureData)[index] = colorIndex; |
| index++; |
| } |
| } |
| } |
| |
| volumeItem->setScaling(QVector3D(2.0f, 1.0f, 2.0f)); |
| volumeItem->setTextureWidth(textureSize); |
| volumeItem->setTextureHeight(textureSize / 2); |
| volumeItem->setTextureDepth(textureSize); |
| volumeItem->setTextureFormat(QImage::Format_Indexed8); |
| volumeItem->setTextureData(textureData); |
| |
| QVector<QRgb> colorTable(256); |
| |
| for (int i = 1; i < 256; i++) { |
| if (i < 15) |
| colorTable[i] = qRgba(0, 0, 0, 0); |
| else if (i < 60) |
| colorTable[i] = qRgba((i * 2) + 120, 0, 0, 15); |
| else if (i < 120) |
| colorTable[i] = qRgba(0, ((i - 60) * 2) + 120, 0, 50); |
| else if (i < 180) |
| colorTable[i] = qRgba(0, 0, ((i - 120) * 2) + 120, 255); |
| else |
| colorTable[i] = qRgba(i, i, i, 255); |
| } |
| |
| volumeItem->setColorTable(colorTable); |
| } |