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Reorganized functions in paths.scad

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Revar Desmera 2020-01-31 16:37:27 -08:00
parent 90daf37a53
commit 7a92ffdbaf
2 changed files with 45 additions and 45 deletions
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88
paths.scad
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@ -373,6 +373,50 @@ function path_self_intersections(path, closed=true, eps=EPSILON) =
]; ];
// Function: split_path_at_self_crossings()
// Usage:
// polylines = split_path_at_self_crossings(path, [closed], [eps]);
// Description:
// Splits a path into polyline sections wherever the path crosses itself.
// Splits may occur mid-segment, so new vertices will be created at the intersection points.
// Arguments:
// path = The path to split up.
// closed = If true, treat path as a closed polygon. Default: true
// eps = Acceptable variance. Default: `EPSILON` (1e-9)
// Example(2D):
// path = [ [-100,100], [0,-50], [100,100], [100,-100], [0,50], [-100,-100] ];
// polylines = split_path_at_self_crossings(path);
// rainbow(polylines) stroke($item, closed=false, width=2);
function split_path_at_self_crossings(path, closed=true, eps=EPSILON) =
let(
path = cleanup_path(path, eps=eps),
isects = deduplicate(
eps=eps,
concat(
[[0, 0]],
sort([
for (
a = path_self_intersections(path, closed=closed, eps=eps),
ss = [ [a[1],a[2]], [a[3],a[4]] ]
) if (ss[0] != undef) ss
]),
[[len(path)-(closed?1:2), 1]]
)
)
) [
for (p = pair(isects))
let(
s1 = p[0][0],
u1 = p[0][1],
s2 = p[1][0],
u2 = p[1][1],
section = path_subselect(path, s1, u1, s2, u2, closed=closed),
outpath = deduplicate(eps=eps, section)
)
outpath
];
function _tag_self_crossing_subpaths(path, closed=true, eps=EPSILON) = function _tag_self_crossing_subpaths(path, closed=true, eps=EPSILON) =
let( let(
subpaths = split_path_at_self_crossings( subpaths = split_path_at_self_crossings(
@ -538,50 +582,6 @@ function assemble_path_fragments(fragments, rightmost=true, eps=EPSILON, _finish
); );
// Function: split_path_at_self_crossings()
// Usage:
// polylines = split_path_at_self_crossings(path, [closed], [eps]);
// Description:
// Splits a path into polyline sections wherever the path crosses itself.
// Splits may occur mid-segment, so new vertices will be created at the intersection points.
// Arguments:
// path = The path to split up.
// closed = If true, treat path as a closed polygon. Default: true
// eps = Acceptable variance. Default: `EPSILON` (1e-9)
// Example(2D):
// path = [ [-100,100], [0,-50], [100,100], [100,-100], [0,50], [-100,-100] ];
// polylines = split_path_at_self_crossings(path);
// rainbow(polylines) stroke($item, closed=false, width=2);
function split_path_at_self_crossings(path, closed=true, eps=EPSILON) =
let(
path = cleanup_path(path, eps=eps),
isects = deduplicate(
eps=eps,
concat(
[[0, 0]],
sort([
for (
a = path_self_intersections(path, closed=closed, eps=eps),
ss = [ [a[1],a[2]], [a[3],a[4]] ]
) if (ss[0] != undef) ss
]),
[[len(path)-(closed?1:2), 1]]
)
)
) [
for (p = pair(isects))
let(
s1 = p[0][0],
u1 = p[0][1],
s2 = p[1][0],
u2 = p[1][1],
section = path_subselect(path, s1, u1, s2, u2, closed=closed),
outpath = deduplicate(eps=eps, section)
)
outpath
];
// Section: 2D Modules // Section: 2D Modules

2
version.scad
View file

@ -8,7 +8,7 @@
////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////
BOSL_VERSION = [2,0,108]; BOSL_VERSION = [2,0,109];
// Section: BOSL Library Version Functions // Section: BOSL Library Version Functions