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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** 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.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "mesh.h"
#include <QtConcurrentRun>
#include <QFile>
void Mesh::load(const QString &fn)
{
reset();
m_maybeRunning = true;
m_future = QtConcurrent::run([fn]() {
MeshData md;
QFile f(fn);
if (!f.open(QIODevice::ReadOnly)) {
qWarning("Failed to open %s", qPrintable(fn));
return md;
}
QByteArray buf = f.readAll();
const char *p = buf.constData();
quint32 format;
memcpy(&format, p, 4);
if (format != 1) {
qWarning("Invalid format in %s", qPrintable(fn));
return md;
}
int ofs = 4;
memcpy(&md.vertexCount, p + ofs, 4);
ofs += 4;
memcpy(md.aabb, p + ofs, 6 * 4);
ofs += 6 * 4;
const int byteCount = md.vertexCount * 8 * 4;
md.geom.resize(byteCount);
memcpy(md.geom.data(), p + ofs, byteCount);
return md;
});
}
MeshData *Mesh::data()
{
if (m_maybeRunning && !m_data.isValid())
m_data = m_future.result();
return &m_data;
}
void Mesh::reset()
{
*data() = MeshData();
m_maybeRunning = false;
}
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