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keep triangles facing outward

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This commit is contained in:
Seth Alves 2015-03-07 11:28:09 -08:00
parent bb0f6b4d28
commit 3642e93b3f
1 changed files with 4 additions and 3 deletions
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7
tools/vhacd/src/VHACDUtilApp.cpp
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@ -51,13 +51,14 @@ bool writeOBJ(QString outFileName, QVector<QVector<VHACD::IVHACD::ConvexHull>>&
out << "v ";
out << formatFloat(hull.m_points[i*3]) << " ";
// swap y and z because up is 3rd value in OBJ
out << formatFloat(hull.m_points[i*3+2]) << "\n";
out << formatFloat(hull.m_points[i*3+1]) << " ";
out << formatFloat(hull.m_points[i*3+2]) << " ";
out << formatFloat(hull.m_points[i*3+1]) << "\n";
}
for (unsigned int i = 0; i < hull.m_nTriangles; i++) {
out << "f ";
out << hull.m_triangles[i*3] + 1 + pointStartOffset << " ";
// change order to flip normal (due to swapping y and z, above)
out << hull.m_triangles[i*3+1] + 1 + pointStartOffset << " ";
out << hull.m_triangles[i*3] + 1 + pointStartOffset << " ";
out << hull.m_triangles[i*3+2] + 1 + pointStartOffset << "\n";
}
out << "\n";