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Correction in _cleave_connected_region and polygon_triangulate and some few tweaks

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RonaldoCMP
2021-11-04 12:09:29 +00:00
parent 10604cd20b
commit 6bd1dd918f
6 changed files with 105 additions and 98 deletions
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6
regions.scad
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@@ -282,9 +282,9 @@ function _region_region_intersections(region1, region2, closed1=true,closed2=tru
for(p2=idx(region2))
let(
poly = closed2?close_path(region2[p2]):region2[p2],
signs = [for(v=poly*seg_normal) v-ref> eps ? 1 : v-ref<-eps ? -1 : 0]
signs = [for(v=poly*seg_normal) abs(v-ref) < eps ? 0 : sign(v-ref) ]
)
if(max(signs)>=0 && min(signs)<=0) // some edge edge intersects line [a1,a2]
if(max(signs)>=0 && min(signs)<=0) // some edge intersects line [a1,a2]
for(j=[0:1:len(poly)-2])
if(signs[j]!=signs[j+1])
let( // exclude non-crossing and collinear segments
@@ -329,7 +329,7 @@ function _region_region_intersections(region1, region2, closed1=true,closed2=tru
// where region1 intersections region2. Split region2 similarly with respect to region1.
// The return is a pair of results of the form [split1, split2] where split1=[frags1,frags2,...]
// and frags1 is a list of path pieces (in order) from the first path of the region.
// You can pass a single path in for either region, but the output will be a singleton list, as ify
// You can pass a single path in for either region, but the output will be a singleton list, as if
// you passed in a singleton region.
// Arguments:
// region1 = first region