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Re-organized region.scad docs.

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Revar Desmera 2020-01-31 21:35:04 -08:00
parent ef0c92cfa5
commit 855aa0cf36
2 changed files with 37 additions and 37 deletions
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72
regions.scad
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@ -152,6 +152,42 @@ function region_path_crossings(path, region, closed=true, eps=EPSILON) = sort([
]); ]);
// Function: split_path_at_region_crossings()
// Usage:
// polylines = split_path_at_region_crossings(path, region, [eps]);
// Description:
// Splits a path into polyline sections wherever the path crosses the perimeter of a region.
// Splits may occur mid-segment, so new vertices will be created at the intersection points.
// Arguments:
// path = The path to split up.
// region = The region to check for perimeter crossings of.
// closed = If true, treat path as a closed polygon. Default: true
// eps = Acceptable variance. Default: `EPSILON` (1e-9)
// Example(2D):
// path = square(50,center=false);
// region = [circle(d=80), circle(d=40)];
// polylines = split_path_at_region_crossings(path, region);
// color("#aaa") region(region);
// rainbow(polylines) stroke($item, closed=false, width=2);
function split_path_at_region_crossings(path, region, closed=true, eps=EPSILON) =
let(
path = deduplicate(path, eps=eps),
region = [for (path=region) deduplicate(path, eps=eps)],
xings = region_path_crossings(path, region, closed=closed, eps=eps),
crossings = deduplicate(
concat([[0,0]], xings, [[len(path)-1,1]]),
eps=eps
),
subpaths = [
for (p = pair(crossings))
deduplicate(eps=eps,
path_subselect(path, p[0][0], p[0][1], p[1][0], p[1][1], closed=closed)
)
]
)
subpaths;
// Section: Offsets and Boolean 2D Geometry // Section: Offsets and Boolean 2D Geometry
@ -512,42 +548,6 @@ function offset(
) return_faces? [edges,faces] : edges; ) return_faces? [edges,faces] : edges;
// Function: split_path_at_region_crossings()
// Usage:
// polylines = split_path_at_region_crossings(path, region, [eps]);
// Description:
// Splits a path into polyline sections wherever the path crosses the perimeter of a region.
// Splits may occur mid-segment, so new vertices will be created at the intersection points.
// Arguments:
// path = The path to split up.
// region = The region to check for perimeter crossings of.
// closed = If true, treat path as a closed polygon. Default: true
// eps = Acceptable variance. Default: `EPSILON` (1e-9)
// Example(2D):
// path = square(50,center=false);
// region = [circle(d=80), circle(d=40)];
// polylines = split_path_at_region_crossings(path, region);
// color("#aaa") region(region);
// rainbow(polylines) stroke($item, closed=false, width=2);
function split_path_at_region_crossings(path, region, closed=true, eps=EPSILON) =
let(
path = deduplicate(path, eps=eps),
region = [for (path=region) deduplicate(path, eps=eps)],
xings = region_path_crossings(path, region, closed=closed, eps=eps),
crossings = deduplicate(
concat([[0,0]], xings, [[len(path)-1,1]]),
eps=eps
),
subpaths = [
for (p = pair(crossings))
deduplicate(eps=eps,
path_subselect(path, p[0][0], p[0][1], p[1][0], p[1][1], closed=closed)
)
]
)
subpaths;
function _tag_subpaths(path, region, eps=EPSILON) = function _tag_subpaths(path, region, eps=EPSILON) =
let( let(
subpaths = split_path_at_region_crossings(path, region, eps=eps), subpaths = split_path_at_region_crossings(path, region, eps=eps),

2
version.scad
View file

@ -8,7 +8,7 @@
////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////
BOSL_VERSION = [2,0,111]; BOSL_VERSION = [2,0,112];
// Section: BOSL Library Version Functions // Section: BOSL Library Version Functions