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3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
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6** This file is part of the Qt Data Visualization module of the Qt Toolkit.
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29
30#include "datagenerator.h"
31#include <QDebug>
32#include <QRandomGenerator>
33
34using namespace QtDataVisualization;
35
36Q_DECLARE_METATYPE(QScatter3DSeries *)
37
38DataGenerator::DataGenerator(QObject *parent) :
39 QObject(parent)
40{
41 qRegisterMetaType<QScatter3DSeries *>();
42
43 m_file = new QFile("results.txt");
44 if (!m_file->open(flags: QIODevice::WriteOnly | QIODevice::Text)) {
45 delete m_file;
46 m_file = 0;
47 }
48}
49
50DataGenerator::~DataGenerator()
51{
52 m_file->close();
53 delete m_file;
54}
55
56void DataGenerator::generateData(QScatter3DSeries *series, uint count)
57{
58 QScatterDataArray *dataArray = new QScatterDataArray;
59 dataArray->resize(asize: count);
60 QScatterDataItem *ptrToDataArray = &dataArray->first();
61
62 for (uint i = 0; i < count; i++) {
63 ptrToDataArray->setPosition(QVector3D(QRandomGenerator::global()->generateDouble(),
64 QRandomGenerator::global()->generateDouble(),
65 QRandomGenerator::global()->generateDouble()));
66 ptrToDataArray++;
67 }
68
69 series->dataProxy()->resetArray(newArray: dataArray);
70}
71
72void DataGenerator::add(QScatter3DSeries *series, uint count)
73{
74 QScatterDataArray appendArray;
75 appendArray.resize(asize: count);
76
77 for (uint i = 0; i < count; i++) {
78 appendArray[i].setPosition(QVector3D(QRandomGenerator::global()->generateDouble(),
79 QRandomGenerator::global()->generateDouble(),
80 QRandomGenerator::global()->generateDouble()));
81 }
82
83 series->dataProxy()->addItems(items: appendArray);
84}
85
86void DataGenerator::writeLine(int itemCount, float fps)
87{
88 if (m_file) {
89 QTextStream out(m_file);
90
91 QString fpsFormatString(QStringLiteral("%1 %2\n"));
92 QString fpsString = fpsFormatString.arg(a: itemCount).arg(a: fps);
93
94 out << fpsString;
95 }
96}
97

source code of qtdatavis3d/tests/manual/qmlperf/datagenerator.cpp