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more anchoring fixes

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This commit is contained in:
Adrian Mariano
2021-11-16 20:46:37 -05:00
parent 45e64f309c
commit 47bf93e6cb
3 changed files with 16 additions and 12 deletions
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6
regions.scad
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@@ -288,6 +288,7 @@ function force_region(poly) = is_path(poly) ? [poly] : poly;
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `"origin"`
// spin = Rotate this many degrees after anchor. See [spin](attachments.scad#spin). Default: `0`
// cp = Centerpoint for determining intersection anchors or centering the shape. Determintes the base of the anchor vector. Can be "centroid", "mean", "box" or a 2D point. Default: "centroid"
// atype = Set to "hull" or "intersect to select anchor type. Default: "hull"
// Example(2D): Displaying a region
// region([circle(d=50), square(25,center=true)]);
// Example(2D): Displaying a list of polygons that intersect each other, which is not a region
@@ -298,13 +299,14 @@ function force_region(poly) = is_path(poly) ? [poly] : poly;
// region(rgn);
module region(r, anchor="origin", spin=0, cp="centroid")
{
assert(in_list(atype, _ANCHOR_TYPES), "Anchor type must be \"hull\" or \"intersect\"");
r = force_region(r);
dummy=assert(is_region(r), "Input is not a region");
points = flatten(r);
lengths = [for(path=r) len(path)];
starts = [0,each cumsum(lengths)];
paths = [for(i=idx(r)) count(s=starts[i], n=lengths[i])];
attachable(anchor, spin, two_d=true, region=r, extent=false, cp=cp){
attachable(anchor, spin, two_d=true, region=r, extent=atype=="hull", cp=cp){
polygon(points=points, paths=paths);
children();
}
@@ -646,7 +648,7 @@ module linear_sweep(region, height=1, center, twist=0, scale=1, slices, maxseg,
slices=slices, maxseg=maxseg,
style=style
);
attachable(anchor,spin,orient, cp=cp, vnf=vnf, extent=!anchor_isect, anchors=anchors) {
attachable(anchor,spin,orient, cp=cp, region=region, h=height, extent=atype=="hull", anchors=anchors) {
vnf_polyhedron(vnf, convexity=convexity);
children();
}