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https://github.com/BelfrySCAD/BOSL2.git
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_UNDEF definition didn't work; moving to constants.scad fixed this.
Fixed vnf.scad so that "convex" is efficient and handles degenerate case in vnf_vertex_array Fixed skin to correctly handle multi-section "distance" skins.
This commit is contained in:
Adrian Mariano
parent
f2914f0efb
commit
75b974906d
4 changed files with 70 additions and 24 deletions
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@ -6,6 +6,7 @@
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//////////////////////////////////////////////////////////////////////
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// Section: Type handling helpers.
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@ -322,6 +323,7 @@ function first_defined(v,recursive=false,_i=0) =
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// Examples:
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// length = one_defined([length,L,l], ["length","L","l"]);
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// length = one_defined([length,L,l], "length,L,l", dflt=1);
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function one_defined(vals, names, dflt=_UNDEF) =
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let(
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checkargs = is_list(names)? assert(len(vals) == len(names)) :
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@ -533,10 +535,6 @@ function get_radius(r1, r2, r, d1, d2, d, dflt) =
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// echo(f(undef, arg1="given1", undef));
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// // ["given1", undef, undef]
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// a value that the user should never enter randomly;
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// result of `dd if=/dev/random bs=32 count=1 |base64` :
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_UNDEF="LRG+HX7dy89RyHvDlAKvb9Y04OTuaikpx205CTh8BSI";
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/* Note: however tempting it might be, it is *not* possible to accept
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* named argument as a list [named1, named2, ...] (without default
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* values), because the values [named1, named2...] themselves might be
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@ -5,6 +5,9 @@
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// include <BOSL2/std.scad>
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//////////////////////////////////////////////////////////////////////
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// a value that the user should never enter randomly;
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// result of `dd if=/dev/random bs=32 count=1 |base64` :
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_UNDEF="LRG+HX7dy89RyHvDlAKvb9Y04OTuaikpx205CTh8BSI";
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// Section: General Constants
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59
skin.scad
59
skin.scad
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@ -5,7 +5,6 @@
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// - https://github.com/openscad/list-comprehension-demos/blob/master/skin.scad
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// Includes:
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// include <BOSL2/std.scad>
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// include <BOSL2/skin.scad>
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//////////////////////////////////////////////////////////////////////
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@ -465,7 +464,7 @@ function skin(profiles, slices, refine=1, method="direct", sampling, caps, close
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: reindex_polygon(resampled[i-1],resampled[i])],
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sliced = slice_profiles(fixedprof, slices, closed)
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)
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!closed ? sliced : concat(sliced,[sliced[0]])
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[!closed ? sliced : concat(sliced,[sliced[0]])]
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: // There are duplicators, so use approach where each pair is treated separately
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[for(i=[0:profcount-1])
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let(
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@ -482,9 +481,59 @@ function skin(profiles, slices, refine=1, method="direct", sampling, caps, close
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". Method ",method[i]," requires equal values"))
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refine[i] * len(pair[0])
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)
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each subdivide_and_slice(pair,slices[i], nsamples, method=sampling)]
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subdivide_and_slice(pair,slices[i], nsamples, method=sampling)]
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)
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vnf_vertex_array(full_list, cap1=fullcaps[0], cap2=fullcaps[1], col_wrap=true, style=style);
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vnf_merge(cleanup=false,
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[for(i=idx(full_list))
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vnf_vertex_array(full_list[i], cap1=i==0 && fullcaps[0], cap2=i==len(full_list)-1 && fullcaps[1],
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col_wrap=true, style=style)]);
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function _skin_core(profiles, caps) =
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let(
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vertices = flatten(profiles),
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plen = len(profiles[0]),
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faces = [
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for(pidx=idx(profiles,e=-2))
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let(
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prof1 = profiles[pidx],
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prof2 = profiles[pidx+1],
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voff = pidx*plen,
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faces = [
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for(
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first = true,
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finishing = false,
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finished = false,
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i=0, j=0, side=false;
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!finished;
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side =
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let(
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p1a = prof1[i%plen],
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p1b = prof1[(i+1)%plen],
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p2a = prof2[j%plen],
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p2b = prof2[(j+1)%plen],
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dist1 = norm(p1a-p2b),
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dist2 = norm(p1b-p2a)
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) (i==j) ? dist1>dist2 : i<j,
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p1 = voff + (i%plen),
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p2 = voff + (j%plen) + plen,
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p3 = voff + (side? (i+1)%plen : (j+1)%plen + plen),
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face = [p1, p3, p2],
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i = i + (side? 1 : 0),
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j = j + (side? 0 : 1),
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first = false,
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finished = finishing,
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finishing = i>=plen && j>=plen
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) if (!first) face
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]
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) each faces,
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if (caps[0]) count(plen,reverse=true),
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if (caps[1]) count(plen,plen*(len(profiles)-1))
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]
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) [vertices, faces];
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@ -1419,7 +1468,7 @@ function path_sweep2d(shape, path, closed=false, caps, quality=1, style="min_edg
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vnf_vertex_array([
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each proflist,
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if (closed) proflist[0]
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],cap1=fullcaps[0],cap1=fullcaps[1],col_wrap=true,style=style);
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],cap1=fullcaps[0],cap2=fullcaps[1],col_wrap=true,style=style);
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module path_sweep2d(profile, path, closed=false, caps, quality=1, style="min_edge", convexity=10,
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24
vnf.scad
24
vnf.scad
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@ -298,7 +298,7 @@ function vnf_vertex_array(
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assert(!(any([caps,cap1,cap2]) && !col_wrap), "col_wrap must be true if caps are requested")
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assert(!(any([caps,cap1,cap2]) && row_wrap), "Cannot combine caps with row_wrap")
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assert(in_list(style,["default","alt","quincunx", "convex","min_edge"]))
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assert(is_consistent(points), "Non-rectangular or invalid point array")
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assert(is_consistent(points), "Non-rectangular or invalid point array")
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let(
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pts = flatten(points),
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pcnt = len(pts),
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@ -346,22 +346,18 @@ function vnf_vertex_array(
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let(
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d42=norm(pts[i4]-pts[i2]),
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d13=norm(pts[i1]-pts[i3]),
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shortface = d42<=d13 ? [[i1,i4,i2],[i2,i4,i3]]
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shortedge = d42<=d13 ? [[i1,i4,i2],[i2,i4,i3]]
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: [[i1,i3,i2],[i1,i4,i3]]
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)
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shortface
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: style=="convex"? // This style bombs on degenerate faces
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let(
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fsets = [
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[[i1,i4,i2],[i2,i4,i3]],
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[[i1,i3,i2],[i1,i4,i3]]
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],
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cps = [for (fset=fsets) [for (f=fset) mean(select(pts,f))]],
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ns = cps + [for (fset=fsets) [for (f=fset) polygon_normal(select(pts,f))]],
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dists = [for (i=idx(fsets)) norm(cps[i][1]-cps[i][0]) - norm(ns[i][1]-ns[i][0])],
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test = reverse? dists[0]>dists[1] : dists[0]<dists[1]
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shortedge
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: style=="convex"?
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let( // Find normal for 3 of the points. Is the other point above or below?
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n = (reverse?-1:1)*cross(pts[i2]-pts[i1],pts[i3]-pts[i1]),
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convexfaces = n==0 ? [[i1,i4,i3]]
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: n*pts[i4] > n*pts[i1] ? [[i1,i4,i2],[i2,i4,i3]]
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: [[i1,i3,i2],[i1,i4,i3]]
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)
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fsets[test?0:1]
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convexfaces
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: [[i1,i3,i2],[i1,i4,i3]],
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// remove degenerate faces
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culled_faces= [for(face=faces)
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