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add nonzero to grid2d

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clean up dead code and add docs to geometry.scad
add faster (?) code for point_on_line
This commit is contained in:
Adrian Mariano
2021-10-11 20:25:11 -04:00
parent 3f62706b03
commit fd36b0020e
3 changed files with 93 additions and 323 deletions
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distributors.scad
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@@ -272,7 +272,7 @@ module zcopies(spacing, n, l, sp)
// Module: grid2d()
//
// Description:
// Makes a square or hexagonal grid of copies of children.
// Makes a square or hexagonal grid of copies of children, with an optional masking polygon or region.
//
// Usage:
// grid2d(spacing, size, [stagger], [scale], [inside]) ...
@@ -287,6 +287,7 @@ module zcopies(spacing, n, l, sp)
// n = How many columns and rows of copies to make. Can be given as `[COLS,ROWS]`, or just as a scalar that specifies both. If staggered, count both staggered and unstaggered columns and rows. Default: 2 (3 if staggered)
// stagger = If true, make a staggered (hexagonal) grid. If false, make square grid. If `"alt"`, makes alternate staggered pattern. Default: false
// inside = If given a list of polygon points, or a region, only creates copies whose center would be inside the polygon or region. Polygon can be concave and/or self crossing.
// nonzero = If inside is set to a polygon with self-crossings then use the nonzero method for deciding if points are in the polygon. Default: false
//
// Side Effects:
// `$pos` is set to the relative centerpoint of each child copy, and can be used to modify each child individually.
@@ -323,7 +324,7 @@ module zcopies(spacing, n, l, sp)
// zrot(180/6)
// cylinder(h=20, d=10/cos(180/6)+0.01, $fn=6);
// }
module grid2d(spacing, n, size, stagger=false, inside=undef)
module grid2d(spacing, n, size, stagger=false, inside=undef, nonzero=false)
{
assert(in_list(stagger, [false, true, "alt"]));
bounds = is_undef(inside)? undef :
@@ -357,8 +358,8 @@ module grid2d(spacing, n, size, stagger=false, inside=undef)
pos = v_mul([col,row],spacing) - offset;
if (
is_undef(inside) ||
(is_path(inside) && point_in_polygon(pos, inside)>=0) ||
(is_region(inside) && point_in_region(pos, inside)>=0)
(is_path(inside) && point_in_polygon(pos, inside, nonzero=nonzero)>=0) ||
(is_region(inside) && point_in_region(pos, inside, nonzero=nonzero)>=0)
) {
$col = col;
$row = row;