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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 "topographicseries.h"
using namespace QtDataVisualization;
//! [0]
// Value used to encode height data as RGB value on PNG file
const float packingFactor = 11983.0f;
//! [0]
TopographicSeries::TopographicSeries()
{
setDrawMode(QSurface3DSeries::DrawSurface);
setFlatShadingEnabled(true);
setBaseColor(Qt::white);
}
TopographicSeries::~TopographicSeries()
{
}
void TopographicSeries::setTopographyFile(const QString file, float width, float height)
{
//! [1]
QImage heightMapImage(file);
uchar *bits = heightMapImage.bits();
int imageHeight = heightMapImage.height();
int imageWidth = heightMapImage.width();
int widthBits = imageWidth * 4;
float stepX = width / float(imageWidth);
float stepZ = height / float(imageHeight);
QSurfaceDataArray *dataArray = new QSurfaceDataArray;
dataArray->reserve(imageHeight);
for (int i = 0; i < imageHeight; i++) {
int p = i * widthBits;
float z = height - float(i) * stepZ;
QSurfaceDataRow *newRow = new QSurfaceDataRow(imageWidth);
for (int j = 0; j < imageWidth; j++) {
uchar aa = bits[p + 0];
uchar rr = bits[p + 1];
uchar gg = bits[p + 2];
uint color = uint((gg << 16) + (rr << 8) + aa);
float y = float(color) / packingFactor;
(*newRow)[j].setPosition(QVector3D(float(j) * stepX, y, z));
p = p + 4;
}
*dataArray << newRow;
}
dataProxy()->resetArray(dataArray);
//! [1]
m_sampleCountX = float(imageWidth);
m_sampleCountZ = float(imageHeight);
}
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