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Merge pull request #1258 from BelfrySCAD/revarbat_dev

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Fix for cyl() teardrop rounding.
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Revar Desmera 2023-08-19 00:42:16 -07:00 committed by GitHub
commit 6a42df748b
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1 changed files with 8 additions and 6 deletions
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shapes3d.scad
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@ -1590,7 +1590,7 @@ function cyl(
[r1, -l/2] + polar_to_xy(chamf1l,90+vang),
]
else if (!approx(round1,0) && td_ang < 90)
each _teardrop_corner(r=abs(round1), corner=[[max(0,r1-2*roundlen1),-l/2],[r1,-l/2],[r2,l/2]], ang=td_ang)
each _teardrop_corner(r=round1, corner=[[max(0,r1-2*roundlen1),-l/2],[r1,-l/2],[r2,l/2]], ang=td_ang)
else if (!approx(round1,0) && td_ang >= 90)
each arc(r=abs(round1), corner=[[max(0,r1-2*roundlen1),-l/2],[r1,-l/2],[r2,l/2]])
else [r1,-l/2],
@ -1623,16 +1623,18 @@ function cyl(
function _teardrop_corner(r, corner, ang=45) =
let(
check = assert(len(corner)==3) assert(is_finite(r)) assert(is_finite(ang)),
cp = circle_2tangents(r, corner)[0],
path1 = arc(r=r, corner=corner),
check = assert(len(corner)==3)
assert(is_finite(r))
assert(is_finite(ang)),
cp = circle_2tangents(abs(r), corner)[0],
path1 = arc(r=abs(r), corner=corner),
path2 = [
for (p = select(path1,0,-2))
if (v_theta(p-cp) >= -ang) p,
if (abs(modang(v_theta(p-cp)-90)) <= 180-ang) p,
last(path1)
],
path = [
line_intersection([corner[0],corner[1]],[path2[0],path2[0]+polar_to_xy(1,-90-ang)]),
line_intersection([corner[0],corner[1]],[path2[0],path2[0]+polar_to_xy(1,-90-ang*sign(r))]),
each path2
]
) path;