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Fixed unmerged adjacent polygons in boolean geometry.

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Revar Desmera
2019-06-17 21:44:50 -07:00
parent 1ad126f85d
commit fea4a6b6ca
2 changed files with 68 additions and 7 deletions
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27
geometry.scad
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@@ -566,13 +566,18 @@ function close_region(region, eps=EPSILON) = [for (path=region) close_path(path,
// region = Region to test for crossings of.
// eps = Acceptable variance. Default: `EPSILON` (1e-9)
function region_path_crossings(path, region, eps=EPSILON) = sort([
for (s1=enumerate(pair_wrap(path)), path=region, s2=pair_wrap(path)) let(
for (
s1=enumerate(pair(close_path(path))),
p=close_region(region),
s2=pair(p)
) let(
isect = _general_line_intersection(s1[1],s2,eps=eps)
) if (
!is_undef(isect) &&
isect[1] >= 0-eps && isect[1] < 1-eps &&
isect[2] >= 0-eps && isect[2] < 1-eps
) [s1[0], isect[1]]
isect[1] >= 0-eps && isect[1] < 1+eps &&
isect[2] >= 0-eps && isect[2] < 1+eps
)
[s1[0], isect[1]]
]);
@@ -580,15 +585,23 @@ function _split_path_at_region_crossings(path, region, eps=EPSILON) =
let(
path = deduplicate(path, eps=eps),
region = [for (path=region) deduplicate(path, eps=eps)],
xings = region_path_crossings(path, region, eps=eps),
crossings = deduplicate(
concat(
[[0,0]],
region_path_crossings(path, region),
xings,
[[len(path)-2,1]]
),
eps=eps
)
) [for (p = pair(crossings)) path_subselect(path, p[0][0], p[0][1], p[1][0], p[1][1])];
),
subpaths = [
for (p = pair(crossings))
deduplicate(eps=eps,
path_subselect(path, p[0][0], p[0][1], p[1][0], p[1][1])
)
]
)
subpaths;
function _tag_subpaths(path, region, eps=EPSILON) =