1 files changed, 90 insertions, 0 deletions
diff --git a/tests/qmlvolume/datasource.cpp b/tests/qmlvolume/datasource.cpp
new file mode 100644
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+++ b/tests/qmlvolume/datasource.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc
+** All rights reserved.
+** For any questions to Digia, please use contact form at http://qt.digia.com
+**
+** This file is part of the QtDataVisualization module.
+**
+** Licensees holding valid Qt Enterprise licenses may use this file in
+** accordance with the Qt Enterprise License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.
+**
+** If you have questions regarding the use of this file, please use
+** contact form at http://qt.digia.com
+**
+****************************************************************************/
+
+#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);
+}