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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.io
**
** This file is part of the Qt Data Visualization module.
**
** Licensees holding valid commercial license for Qt may use this file in
** accordance with the Qt 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.io
**
****************************************************************************/
#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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