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Merge pull request #10 from openscad/sentinel-workaround

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Sentinel workaround, should fix #8
This commit is contained in:
Mikko Mononen 2015-01-14 10:41:03 +02:00
commit 24e4bdd415
1 changed files with 6 additions and 4 deletions
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10
Source/sweep.c
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@ -1121,10 +1121,12 @@ static void InitEdgeDict( TESStesselator *tess )
w = (tess->bmax[0] - tess->bmin[0]);
h = (tess->bmax[1] - tess->bmin[1]);
smin = tess->bmin[0] - w;
smax = tess->bmax[0] + w;
tmin = tess->bmin[1] - h;
tmax = tess->bmax[1] + h;
/* If the bbox is empty, ensure that sentinels are not coincident by
slightly enlarging it. */
smin = tess->bmin[0] - (w > 0 ? w : 0.01);
smax = tess->bmax[0] + (w > 0 ? w : 0.01);
tmin = tess->bmin[1] - (h > 0 ? h : 0.01);
tmax = tess->bmax[1] + (h > 0 ? h : 0.01);
AddSentinel( tess, smin, smax, tmin );
AddSentinel( tess, smin, smax, tmax );