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| author | Marius Kintel <marius@kintel.net> | 2011-12-26 15:37:45 (GMT) |
|---|---|---|
| committer | Marius Kintel <marius@kintel.net> | 2011-12-26 15:37:45 (GMT) |
| commit | e502fab71d998c0bd025512c0c3884a1117479d1 (patch) | |
| tree | 5fb916cf36fcf418b8f384c3429b8342855e9f17 /src/export.cc | |
| parent | c4bffdaf37fdf72a84a225ec584d3698fe398857 (diff) | |
| parent | 4ff2d1af446c1f276c644b12e6ec4cc6db0b6d65 (diff) | |
Merge branch 'master' into color-priority
Conflicts:
openscad.pro
Diffstat (limited to 'src/export.cc')
| -rw-r--r-- | src/export.cc | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/export.cc b/src/export.cc index 99bce98..5ce2d15 100644 --- a/src/export.cc +++ b/src/export.cc @@ -102,6 +102,9 @@ void export_stl(CGAL_Nef_polyhedron *root_N, std::ostream &output, QProgressDial double ny = dn[2]*dn[3] - dn[0]*dn[5]; double nz = dn[0]*dn[4] - dn[1]*dn[3]; double nlength = sqrt(nx*nx + ny*ny + nz*nz); + // Avoid generating normals for polygons with zero area + double eps = 0.000001; + if (nlength < eps) nlength = 1.0; output << " facet normal " << nx / nlength << " " << ny / nlength << " " |