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