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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#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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