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fix path_sweep handling of regions as input

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Adrian Mariano 2022-05-03 17:39:30 -04:00
parent 84118516c6
commit c2a623d071
1 changed files with 17 additions and 4 deletions
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skin.scad
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@ -897,6 +897,9 @@ module spiral_sweep(poly, h, r, turns=1, higbee, center, r1, r2, d, d1, d2, higb
// the cross section orientation. Specifying a list of normal vectors gives you complete control over the orientation of your
// cross sections and can be useful if you want to position your model to be on the surface of some solid.
// .
// You can use set `transforms` to true to return a list of transformation matrices instead of the swept shape. In this case, you can
// often omit shape entirely. The exception is when `closed=true` and you are using the "incremental" method. In this case, `path_sweep`
// uses the shape to correct for twist when the shape closes on itself, so you must include a valid shape.
// Arguments:
// shape = A 2D polygon path or region describing the shape to be swept.
// path = 2D or 3D path giving the path to sweep over
@ -1184,10 +1187,11 @@ module spiral_sweep(poly, h, r, turns=1, higbee, center, r1, r2, d, d1, d2, higb
// method="manual", normal=UP);
// }
module path_sweep(shape, path, method="incremental", normal, closed=false, twist=0, twist_by_length=true,
module path_sweep(shape, path, method="incremental", normal, closed, twist=0, twist_by_length=true,
symmetry=1, last_normal, tangent, uniform=true, relaxed=false, caps, style="min_edge", convexity=10,
anchor="origin",cp="centroid",spin=0, orient=UP, atype="hull",profiles=false,width=1)
{
dummy = assert(is_region(shape) || is_path(shape,2), "shape must be a 2D path or region");
vnf = path_sweep(shape, path, method, normal, closed, twist, twist_by_length,
symmetry, last_normal, tangent, uniform, relaxed, caps, style);
@ -1195,8 +1199,10 @@ module path_sweep(shape, path, method="incremental", normal, closed=false, twist
assert(in_list(atype, _ANCHOR_TYPES), "Anchor type must be \"hull\" or \"intersect\"");
tran = path_sweep(shape, path, method, normal, closed, twist, twist_by_length,
symmetry, last_normal, tangent, uniform, relaxed,transforms=true);
rshape = is_path(shape) ? [path3d(shape)]
: [for(s=shape) path3d(s)];
attachable(anchor,spin,orient, vnf=vnf, extent=atype=="hull", cp=cp) {
for(T=tran) stroke([apply(T,path3d(shape))],width=width);
for(T=tran) stroke([for(part=rshape)apply(T,part)],width=width);
children();
}
}
@ -1206,9 +1212,15 @@ module path_sweep(shape, path, method="incremental", normal, closed=false, twist
}
function path_sweep(shape, path, method="incremental", normal, closed=false, twist=0, twist_by_length=true,
function path_sweep(shape, path, method="incremental", normal, closed, twist=0, twist_by_length=true,
symmetry=1, last_normal, tangent, uniform=true, relaxed=false, caps, style="min_edge", transforms=false,
anchor="origin",cp="centroid",spin=0, orient=UP, atype="hull") =
anchor="origin",cp="centroid",spin=0, orient=UP, atype="hull") =
let(a=echo(is_1region(path),closed))
is_1region(path) ? path_sweep(shape=shape,path=path[0], method=method, normal=normal, closed=default(closed,true),
twist=twist, twist_by_length=twist_by_length, symmetry=symmetry, last_normal=last_normal,
tangent=tangent, uniform=uniform, relaxed=relaxed, caps=caps, style=style, transforms=transforms,
anchor=anchor, cp=cp, spin=spin, orient=orient, atype=atype) :
let(closed=default(closed,false))
assert(in_list(atype, _ANCHOR_TYPES), "Anchor type must be \"hull\" or \"intersect\"")
assert(!closed || twist % (360/symmetry)==0, str("For a closed sweep, twist must be a multiple of 360/symmetry = ",360/symmetry))
assert(closed || symmetry==1, "symmetry must be 1 when closed is false")
@ -1216,6 +1228,7 @@ function path_sweep(shape, path, method="incremental", normal, closed=false, twi
let(path = force_path(path))
assert(is_path(path,[2,3]), "input path is not a 2D or 3D path")
assert(!closed || !approx(path[0],last(path)), "Closed path includes start point at the end")
assert((is_region(shape) || is_path(shape,2)) || (transforms && !(closed && method=="incremental")),"shape must be a 2d path or region")
let(
path = path3d(path),
caps = is_def(caps) ? caps :