mirror of
https://github.com/crystalidea/qt6windows7.git
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52 lines
1.2 KiB
C++
52 lines
1.2 KiB
C++
// Copyright (C) 2017 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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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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