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Added point_segment_distance(), segment_distance(). Renamed distance_from_line() -> point_line_distance(). Renamed distance_from_plane() -> point_plane_distance()

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Garth Minette
2021-06-10 15:49:44 -07:00
parent 9d9234513d
commit 5ee224f2d3
4 changed files with 135 additions and 47 deletions
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36
skin.scad
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@@ -812,24 +812,30 @@ function _skin_tangent_match(poly1, poly2) =
newbig = polygon_shift(big, shift),
repeat_counts = [for(i=[0:len(small)-1]) posmod(cutpts[i]-select(cutpts,i-1),len(big))],
newsmall = repeat_entries(small,repeat_counts)
)
assert(len(newsmall)==len(newbig), "Tangent alignment failed, probably because of insufficient points or a concave curve")
swap ? [newbig, newsmall] : [newsmall, newbig];
)
assert(len(newsmall)==len(newbig), "Tangent alignment failed, probably because of insufficient points or a concave curve")
swap ? [newbig, newsmall] : [newsmall, newbig];
function _find_one_tangent(curve, edge, curve_offset=[0,0,0], closed=true) =
let(
angles =
[for(i=[0:len(curve)-(closed?1:2)])
let(
plane = plane3pt( edge[0], edge[1], curve[i]),
tangent = [curve[i], select(curve,i+1)]
)
plane_line_angle(plane,tangent)],
zero_cross = [for(i=[0:len(curve)-(closed?1:2)]) if (sign(angles[i]) != sign(select(angles,i+1))) i],
d = [for(i=zero_cross) distance_from_line(edge, curve[i]+curve_offset)]
)
zero_cross[min_index(d)];
let(
angles = [
for (i = [0:len(curve)-(closed?1:2)])
let(
plane = plane3pt( edge[0], edge[1], curve[i]),
tangent = [curve[i], select(curve,i+1)]
) plane_line_angle(plane,tangent)
],
zero_cross = [
for (i = [0:len(curve)-(closed?1:2)])
if (sign(angles[i]) != sign(select(angles,i+1)))
i
],
d = [
for (i = zero_cross)
point_line_distance(curve[i]+curve_offset, edge)
]
) zero_cross[min_index(d)];
// Function: associate_vertices()