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50
51 #include "mesh.h"
52 #include <QtConcurrentRun>
53 #include <QFile>
54
load(const QString & fn)55 void Mesh::load(const QString &fn)
56 {
57 reset();
58 m_maybeRunning = true;
59 m_future = QtConcurrent::run([fn]() {
60 MeshData md;
61 QFile f(fn);
62 if (!f.open(QIODevice::ReadOnly)) {
63 qWarning("Failed to open %s", qPrintable(fn));
64 return md;
65 }
66 QByteArray buf = f.readAll();
67 const char *p = buf.constData();
68 quint32 format;
69 memcpy(&format, p, 4);
70 if (format != 1) {
71 qWarning("Invalid format in %s", qPrintable(fn));
72 return md;
73 }
74 int ofs = 4;
75 memcpy(&md.vertexCount, p + ofs, 4);
76 ofs += 4;
77 memcpy(md.aabb, p + ofs, 6 * 4);
78 ofs += 6 * 4;
79 const int byteCount = md.vertexCount * 8 * 4;
80 md.geom.resize(byteCount);
81 memcpy(md.geom.data(), p + ofs, byteCount);
82 return md;
83 });
84 }
85
data()86 MeshData *Mesh::data()
87 {
88 if (m_maybeRunning && !m_data.isValid())
89 m_data = m_future.result();
90
91 return &m_data;
92 }
93
reset()94 void Mesh::reset()
95 {
96 *data() = MeshData();
97 m_maybeRunning = false;
98 }
99