blob: de3783dcf4edf851d7ce5272982297cd747fee03 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
/******************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Data Visualization module.
**
** $QT_BEGIN_LICENSE:COMM$
**
** 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 http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
******************************************************************************/
#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);
}
|