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skip zero area polygons in vnf_slice

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Adrian Mariano 2024-01-20 14:12:18 -05:00
parent 41369e844b
commit d17f72cffd
1 changed files with 5 additions and 3 deletions
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8
vnf.scad
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@ -806,8 +806,8 @@ function vnf_triangulate(vnf) =
// Function vnf_unify_faces()
// Synposis: Remove triangulation from VNF, returning a copy with full faces
// Function: vnf_unify_faces()
// Synopsis: Remove triangulation from VNF, returning a copy with full faces
// SynTags: VNF
// Topics: VNF Manipulation
// See Also: vnf_reverse_faces(), vnf_quantize(), vnf_merge_points(), vnf_triangulate(), vnf_slice()
@ -999,7 +999,9 @@ function _slice_3dpolygons(polys, dir, cuts) =
)
flatten([
for (poly = polys)
let( plane = plane_from_polygon(poly))
if (polygon_area(poly)>EPSILON) // Discard zero area polygons
let(
plane = plane_from_polygon(poly,1e-4))
assert(plane,"Found non-coplanar face.")
let(
normal = point3d(plane),