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BOSL2/masks2d.scad
Richard Milewski a36fcd2d81 SynTags for masks2d, masks3d and partitions
2023-04-14 15:53:35 -07:00

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//////////////////////////////////////////////////////////////////////
// LibFile: masks2d.scad
// This file provides 2D masking shapes that you can use with {{edge_profile()}} to mask edges.
// The shapes include the simple roundover and chamfer as well as more elaborate shapes
// like the cove and ogee found in furniture and architecture. You can make the masks
// as geometry or as 2D paths.
// Includes:
// include <BOSL2/std.scad>
// FileGroup: Basic Modeling
// FileSummary: 2D masking shapes for edge profiling: including roundover, cove, teardrop, ogee.
// FileFootnotes: STD=Included in std.scad
//////////////////////////////////////////////////////////////////////
// Section: 2D Masking Shapes
// Function&Module: mask2d_roundover()
// Synopsis: Creates a 2D beading mask shape useful for rounding 90° edges.
// SynTags: Geom, Path
// Topics: Shapes (2D), Paths (2D), Path Generators, Attachable, Masks (2D)
// See Also: corner_profile(), edge_profile(), face_profile(), fillet()
// Usage: As module
// mask2d_roundover(r|d=, [inset], [excess]) [ATTACHMENTS];
// Usage: As function
// path = mask2d_roundover(r|d=, [inset], [excess]);
// Description:
// Creates a 2D roundover/bead mask shape that is useful for extruding into a 3D mask for a 90° edge.
// Conversely, you can use that same extruded shape to make an interior fillet between two walls at a 90º angle.
// As a 2D mask, this is designed to be differenced away from the edge of a shape that is in the first (X+Y+) quadrant.
// If called as a function, this just returns a 2D path of the outline of the mask shape.
// Arguments:
// r = Radius of the roundover.
// inset = Optional bead inset size. Default: 0
// excess = Extra amount of mask shape to creates on the X- and Y- sides of the shape. Default: 0.01
// ---
// d = Diameter of the roundover.
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
// Example(2D): 2D Roundover Mask
// mask2d_roundover(r=10);
// Example(2D): 2D Bead Mask
// mask2d_roundover(r=10,inset=2);
// Example: Masking by Edge Attachment
// diff()
// cube([50,60,70],center=true)
// edge_profile([TOP,"Z"],except=[BACK,TOP+LEFT])
// mask2d_roundover(r=10, inset=2);
// Example: Making an interior fillet
// %render() difference() {
// move(-[5,0,5]) cube(30, anchor=BOT+LEFT);
// cube(310, anchor=BOT+LEFT);
// }
// xrot(90)
// linear_extrude(height=30, center=true)
// mask2d_roundover(r=10);
module mask2d_roundover(r, inset=0, excess=0.01, d, anchor=CENTER,spin=0) {
path = mask2d_roundover(r=r,d=d,excess=excess,inset=inset);
attachable(anchor,spin, two_d=true, path=path) {
polygon(path);
children();
}
}
function mask2d_roundover(r, inset=0, excess=0.01, d, anchor=CENTER,spin=0) =
assert(is_finite(r)||is_finite(d))
assert(is_finite(excess))
assert(is_finite(inset)||(is_vector(inset)&&len(inset)==2))
let(
inset = is_list(inset)? inset : [inset,inset],
r = get_radius(r=r,d=d,dflt=1),
steps = quantup(segs(r),4)/4,
step = 90/steps,
path = [
[r+inset.x,-excess],
[-excess,-excess],
[-excess, r+inset.y],
for (i=[0:1:steps]) [r,r] + inset + polar_to_xy(r,180+i*step)
]
) reorient(anchor,spin, two_d=true, path=path, extent=false, p=path);
// Function&Module: mask2d_cove()
// Synopsis: Creates a 2D cove (quarter-round) mask shape.
// SynTags: Geom, Path
// Topics: Shapes (2D), Paths (2D), Path Generators, Attachable, Masks (2D)
// See Also: corner_profile(), edge_profile(), face_profile()
// Usage: As module
// mask2d_cove(r|d=, [inset], [excess]) [ATTACHMENTS];
// Usage: As function
// path = mask2d_cove(r|d=, [inset], [excess]);
// Description:
// Creates a 2D cove mask shape that is useful for extruding into a 3D mask for a 90° edge.
// Conversely, you can use that same extruded shape to make an interior rounded shelf decoration between two walls at a 90º angle.
// As a 2D mask, this is designed to be differenced away from the edge of a shape that is in the first (X+Y+) quadrant.
// If called as a function, this just returns a 2D path of the outline of the mask shape.
// Arguments:
// r = Radius of the cove.
// inset = Optional amount to inset code from corner. Default: 0
// excess = Extra amount of mask shape to creates on the X- and Y- sides of the shape. Default: 0.01
// ---
// d = Diameter of the cove.
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
// Example(2D): 2D Cove Mask
// mask2d_cove(r=10);
// Example(2D): 2D Inset Cove Mask
// mask2d_cove(r=10,inset=3);
// Example: Masking by Edge Attachment
// diff()
// cube([50,60,70],center=true)
// edge_profile([TOP,"Z"],except=[BACK,TOP+LEFT])
// mask2d_cove(r=10, inset=2);
// Example: Making an interior rounded shelf
// %render() difference() {
// move(-[5,0,5]) cube(30, anchor=BOT+LEFT);
// cube(310, anchor=BOT+LEFT);
// }
// xrot(90)
// linear_extrude(height=30, center=true)
// mask2d_cove(r=5, inset=5);
module mask2d_cove(r, inset=0, excess=0.01, d, anchor=CENTER,spin=0) {
path = mask2d_cove(r=r,d=d,excess=excess,inset=inset);
attachable(anchor,spin, two_d=true, path=path) {
polygon(path);
children();
}
}
function mask2d_cove(r, inset=0, excess=0.01, d, anchor=CENTER,spin=0) =
assert(is_finite(r)||is_finite(d))
assert(is_finite(excess))
assert(is_finite(inset)||(is_vector(inset)&&len(inset)==2))
let(
inset = is_list(inset)? inset : [inset,inset],
r = get_radius(r=r,d=d,dflt=1),
steps = quantup(segs(r),4)/4,
step = 90/steps,
path = [
[r+inset.x,-excess],
[-excess,-excess],
[-excess, r+inset.y],
for (i=[0:1:steps]) inset + polar_to_xy(r,90-i*step)
]
) reorient(anchor,spin, two_d=true, path=path, p=path);
// Function&Module: mask2d_chamfer()
// Synopsis: Produces a 2D chamfer mask shape.
// SynTags: Geom, Path
// Topics: Shapes (2D), Paths (2D), Path Generators, Attachable, Masks (2D)
// See Also: corner_profile(), edge_profile(), face_profile()
// Usage: As Module
// mask2d_chamfer(edge, [angle], [inset], [excess]) [ATTACHMENTS];
// mask2d_chamfer(y=, [angle=], [inset=], [excess=]) [ATTACHMENTS];
// mask2d_chamfer(x=, [angle=], [inset=], [excess=]) [ATTACHMENTS];
// Usage: As Function
// path = mask2d_chamfer(edge, [angle], [inset], [excess]);
// path = mask2d_chamfer(y=, [angle=], [inset=], [excess=]);
// path = mask2d_chamfer(x=, [angle=], [inset=], [excess=]);
// Description:
// Creates a 2D chamfer mask shape that is useful for extruding into a 3D mask for a 90° edge.
// Conversely, you can use that same extruded shape to make an interior chamfer between two walls at a 90º angle.
// As a 2D mask, this is designed to be differenced away from the edge of a shape that is in the first (X+Y+) quadrant.
// If called as a function, this just returns a 2D path of the outline of the mask shape.
// The edge parameter specifies the length of the chamfer's slanted edge. Alternatively you can give x or y to
// specify the width or height. Only one of x, y, or width is permitted.
// Arguments:
// edge = The length of the edge of the chamfer.
// angle = The angle of the chamfer edge, away from vertical. Default: 45.
// inset = Optional amount to inset code from corner. Default: 0
// excess = Extra amount of mask shape to creates on the X- and Y- sides of the shape. Default: 0.01
// ---
// x = The width of the chamfer.
// y = The height of the chamfer.
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
// Example(2D): 2D Chamfer Mask
// mask2d_chamfer(x=10);
// Example(2D): 2D Chamfer Mask by Width.
// mask2d_chamfer(x=10, angle=30);
// Example(2D): 2D Chamfer Mask by Height.
// mask2d_chamfer(y=10, angle=30);
// Example(2D): 2D Inset Chamfer Mask
// mask2d_chamfer(x=10, inset=2);
// Example: Masking by Edge Attachment
// diff()
// cube([50,60,70],center=true)
// edge_profile([TOP,"Z"],except=[BACK,TOP+LEFT])
// mask2d_chamfer(x=10, inset=2);
// Example: Making an interior chamfer
// %render() difference() {
// move(-[5,0,5]) cube(30, anchor=BOT+LEFT);
// cube(310, anchor=BOT+LEFT);
// }
// xrot(90)
// linear_extrude(height=30, center=true)
// mask2d_chamfer(edge=10);
module mask2d_chamfer(edge, angle=45, inset=0, excess=0.01, x, y, anchor=CENTER,spin=0) {
path = mask2d_chamfer(x=x, y=y, edge=edge, angle=angle, excess=excess, inset=inset);
attachable(anchor,spin, two_d=true, path=path, extent=true) {
polygon(path);
children();
}
}
function mask2d_chamfer(edge, angle=45, inset=0, excess=0.01, x, y, anchor=CENTER,spin=0) =
let(dummy=one_defined([x,y,edge],["x","y","edge"]))
assert(is_finite(angle))
assert(is_finite(excess))
assert(is_finite(inset)||(is_vector(inset)&&len(inset)==2))
let(
inset = is_list(inset)? inset : [inset,inset],
x = is_def(x)? x :
is_def(y)? adj_ang_to_opp(adj=y,ang=angle) :
hyp_ang_to_opp(hyp=edge,ang=angle),
y = opp_ang_to_adj(opp=x,ang=angle),
path = [
[x+inset.x, -excess],
[-excess, -excess],
[-excess, y+inset.y],
[inset.x, y+inset.y],
[x+inset.x, inset.y]
]
) reorient(anchor,spin, two_d=true, path=path, extent=true, p=path);
// Function&Module: mask2d_rabbet()
// Synopsis: Creates a rabbet mask shape.
// SynTags: Geom, Path
// Topics: Shapes (2D), Paths (2D), Path Generators, Attachable, Masks (2D)
// See Also: corner_profile(), edge_profile(), face_profile()
// Usage: As Module
// mask2d_rabbet(size, [excess]) [ATTACHMENTS];
// Usage: As Function
// path = mask2d_rabbet(size, [excess]);
// Description:
// Creates a 2D rabbet mask shape that is useful for extruding into a 3D mask for a 90° edge.
// Conversely, you can use that same extruded shape to make an interior shelf decoration between two walls at a 90º angle.
// As a 2D mask, this is designed to be differenced away from the edge of a shape that is in the first (X+Y+) quadrant.
// If called as a function, this just returns a 2D path of the outline of the mask shape.
// Arguments:
// size = The size of the rabbet, either as a scalar or an [X,Y] list.
// excess = Extra amount of mask shape to creates on the X- and Y- sides of the shape. Default: 0.01
// ---
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
// Example(2D): 2D Rabbet Mask
// mask2d_rabbet(size=10);
// Example(2D): 2D Asymmetrical Rabbet Mask
// mask2d_rabbet(size=[5,10]);
// Example: Masking by Edge Attachment
// diff()
// cube([50,60,70],center=true)
// edge_profile([TOP,"Z"],except=[BACK,TOP+LEFT])
// mask2d_rabbet(size=10);
// Example: Making an interior shelf
// %render() difference() {
// move(-[5,0,5]) cube(30, anchor=BOT+LEFT);
// cube(310, anchor=BOT+LEFT);
// }
// xrot(90)
// linear_extrude(height=30, center=true)
// mask2d_rabbet(size=[5,10]);
module mask2d_rabbet(size, excess=0.01, anchor=CENTER,spin=0) {
path = mask2d_rabbet(size=size, excess=excess);
attachable(anchor,spin, two_d=true, path=path, extent=false) {
polygon(path);
children();
}
}
function mask2d_rabbet(size, excess=0.01, anchor=CENTER,spin=0) =
assert(is_finite(size)||(is_vector(size)&&len(size)==2))
assert(is_finite(excess))
let(
size = is_list(size)? size : [size,size],
path = [
[size.x, -excess],
[-excess, -excess],
[-excess, size.y],
size
]
) reorient(anchor,spin, two_d=true, path=path, extent=false, p=path);
// Function&Module: mask2d_dovetail()
// Synopsis: Creates a 2D dovetail mask shape.
// SynTags: Geom, Path
// Topics: Masks (2D), Shapes (2D), Paths (2D), Path Generators, Attachable
// See Also: corner_profile(), edge_profile(), face_profile()
// Usage: As Module
// mask2d_dovetail(edge, [angle], [inset], [shelf], [excess], ...) [ATTACHMENTS];
// mask2d_dovetail(x=, [angle=], [inset=], [shelf=], [excess=], ...) [ATTACHMENTS];
// mask2d_dovetail(y=, [angle=], [inset=], [shelf=], [excess=], ...) [ATTACHMENTS];
// Usage: As Function
// path = mask2d_dovetail(edge, [angle], [inset], [shelf], [excess]);
// Description:
// Creates a 2D dovetail mask shape that is useful for extruding into a 3D mask for a 90° edge.
// Conversely, you can use that same extruded shape to make an interior dovetail between two walls at a 90º angle.
// As a 2D mask, this is designed to be differenced away from the edge of a shape that is in the first (X+Y+) quadrant.
// If called as a function, this just returns a 2D path of the outline of the mask shape.
// Arguments:
// edge = The length of the edge of the dovetail.
// angle = The angle of the chamfer edge, away from vertical. Default: 30.
// inset = Optional amount to inset code from corner. Default: 0
// shelf = The extra height to add to the inside corner of the dovetail. Default: 0
// excess = Extra amount of mask shape to creates on the X- and Y- sides of the shape. Default: 0.01
// ---
// x = The width of the dovetail.
// y = The height of the dovetail.
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
// Example(2D): 2D Dovetail Mask
// mask2d_dovetail(x=10);
// Example(2D): 2D Dovetail Mask by Width.
// mask2d_dovetail(x=10, angle=30);
// Example(2D): 2D Dovetail Mask by Height.
// mask2d_dovetail(y=10, angle=30);
// Example(2D): 2D Inset Dovetail Mask
// mask2d_dovetail(x=10, inset=2);
// Example: Masking by Edge Attachment
// diff()
// cube([50,60,70],center=true)
// edge_profile([TOP,"Z"],except=[BACK,TOP+LEFT])
// mask2d_dovetail(x=10, inset=2);
// Example: Making an interior dovetail
// %render() difference() {
// move(-[5,0,5]) cube(30, anchor=BOT+LEFT);
// cube(310, anchor=BOT+LEFT);
// }
// xrot(90)
// linear_extrude(height=30, center=true)
// mask2d_dovetail(x=10);
module mask2d_dovetail(edge, angle=30, inset=0, shelf=0, excess=0.01, x, y, anchor=CENTER, spin=0) {
path = mask2d_dovetail(x=x, y=y, edge=edge, angle=angle, inset=inset, shelf=shelf, excess=excess);
attachable(anchor,spin, two_d=true, path=path) {
polygon(path);
children();
}
}
function mask2d_dovetail(edge, angle=30, inset=0, shelf=0, excess=0.01, x, y, anchor=CENTER, spin=0) =
assert(num_defined([x,y,edge])==1)
assert(is_finite(first_defined([x,y,edge])))
assert(is_finite(angle))
assert(is_finite(excess))
assert(is_finite(inset)||(is_vector(inset)&&len(inset)==2))
let(
inset = is_list(inset)? inset : [inset,inset],
x = !is_undef(x)? x :
!is_undef(y)? adj_ang_to_opp(adj=y,ang=angle) :
hyp_ang_to_opp(hyp=edge,ang=angle),
y = opp_ang_to_adj(opp=x,ang=angle),
path = [
[inset.x,0],
[-excess, 0],
[-excess, y+inset.y+shelf],
inset+[x,y+shelf],
inset+[x,y],
inset
]
) reorient(anchor,spin, two_d=true, path=path, p=path);
// Function&Module: mask2d_teardrop()
// Synopsis: Creates a 2D teardrop mask shape with a controllable maximum angle from vertical.
// SynTags: Geom, Path
// Topics: Shapes (2D), Paths (2D), Path Generators, Attachable, Masks (2D), FDM Optimized
// See Also: corner_profile(), edge_profile(), face_profile()
// Usage: As Module
// mask2d_teardrop(r|d=, [angle], [excess]) [ATTACHMENTS];
// Usage: As Function
// path = mask2d_teardrop(r|d=, [angle], [excess]);
// Description:
// Creates a 2D teardrop mask shape that is useful for extruding into a 3D mask for a 90° edge.
// Conversely, you can use that same extruded shape to make an interior teardrop fillet between two walls at a 90º angle.
// As a 2D mask, this is designed to be differenced away from the edge of a shape that is in the first (X+Y+) quadrant.
// If called as a function, this just returns a 2D path of the outline of the mask shape.
// This is particularly useful to make partially rounded bottoms, that don't need support to print.
// Arguments:
// r = Radius of the rounding.
// angle = The maximum angle from vertical.
// excess = Extra amount of mask shape to creates on the X- and Y- sides of the shape. Default: 0.01
// ---
// d = Diameter of the rounding.
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
// Example(2D): 2D Teardrop Mask
// mask2d_teardrop(r=10);
// Example(2D): Using a Custom Angle
// mask2d_teardrop(r=10,angle=30);
// Example: Masking by Edge Attachment
// diff()
// cube([50,60,70],center=true)
// edge_profile(BOT)
// mask2d_teardrop(r=10, angle=40);
// Example: Making an interior teardrop fillet
// %render() difference() {
// move(-[5,0,5]) cube(30, anchor=BOT+LEFT);
// cube(310, anchor=BOT+LEFT);
// }
// xrot(90)
// linear_extrude(height=30, center=true)
// mask2d_teardrop(r=10);
function mask2d_teardrop(r, angle=45, excess=0.01, d, anchor=CENTER, spin=0) =
assert(is_finite(angle))
assert(angle>0 && angle<90)
assert(is_finite(excess))
let(
r = get_radius(r=r, d=d, dflt=1),
n = ceil(segs(r) * angle/360),
cp = [r,r],
tp = cp + polar_to_xy(r,180+angle),
bp = [tp.x+adj_ang_to_opp(tp.y,angle), 0],
step = angle/n,
path = [
bp, bp-[0,excess], [-excess,-excess], [-excess,r],
for (i=[0:1:n]) cp+polar_to_xy(r,180+i*step)
]
) reorient(anchor,spin, two_d=true, path=path, p=path);
module mask2d_teardrop(r, angle=45, excess=0.01, d, anchor=CENTER, spin=0) {
path = mask2d_teardrop(r=r, d=d, angle=angle, excess=excess);
attachable(anchor,spin, two_d=true, path=path) {
polygon(path);
children();
}
}
// Function&Module: mask2d_ogee()
// Synopsis: Creates a 2D ogee mask shape.
// SynTags: Geom, Path
// Topics: Shapes (2D), Paths (2D), Path Generators, Attachable, Masks (2D)
// See Also: corner_profile(), edge_profile(), face_profile()
// Usage: As Module
// mask2d_ogee(pattern, [excess], ...) [ATTAHCMENTS];
// Usage: As Function
// path = mask2d_ogee(pattern, [excess], ...);
//
// Description:
// Creates a 2D Ogee mask shape that is useful for extruding into a 3D mask for a 90° edge.
// Conversely, you can use that same extruded shape to make an interior ogee decoration between two walls at a 90º angle.
// As a 2D mask, this is designed to be differenced away from the edge of a shape that is in the first (X+Y+) quadrant.
// Since there are a number of shapes that fall under the name ogee, the shape of this mask is given as a pattern.
// Patterns are given as TYPE, VALUE pairs. ie: `["fillet",10, "xstep",2, "step",[5,5], ...]`. See Patterns below.
// If called as a function, this just returns a 2D path of the outline of the mask shape.
// .
// ### Patterns
// .
// Type | Argument | Description
// -------- | --------- | ----------------
// "step" | [x,y] | Makes a line to a point `x` right and `y` down.
// "xstep" | dist | Makes a `dist` length line towards X+.
// "ystep" | dist | Makes a `dist` length line towards Y-.
// "round" | radius | Makes an arc that will mask a roundover.
// "fillet" | radius | Makes an arc that will mask a fillet.
//
// Arguments:
// pattern = A list of pattern pieces to describe the Ogee.
// excess = Extra amount of mask shape to creates on the X- and Y- sides of the shape. Default: 0.01
// ---
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
//
// Example(2D): 2D Ogee Mask
// mask2d_ogee([
// "xstep",1, "ystep",1, // Starting shoulder.
// "fillet",5, "round",5, // S-curve.
// "ystep",1, "xstep",1 // Ending shoulder.
// ]);
// Example: Masking by Edge Attachment
// diff()
// cube([50,60,70],center=true)
// edge_profile(TOP)
// mask2d_ogee([
// "xstep",1, "ystep",1, // Starting shoulder.
// "fillet",5, "round",5, // S-curve.
// "ystep",1, "xstep",1 // Ending shoulder.
// ]);
// Example: Making an interior ogee
// %render() difference() {
// move(-[5,0,5]) cube(30, anchor=BOT+LEFT);
// cube(310, anchor=BOT+LEFT);
// }
// xrot(90)
// linear_extrude(height=30, center=true)
// mask2d_ogee([
// "xstep", 1, "round",5,
// "ystep",1, "fillet",5,
// "xstep", 1, "ystep", 1,
// ]);
module mask2d_ogee(pattern, excess=0.01, anchor=CENTER,spin=0) {
path = mask2d_ogee(pattern, excess=excess);
attachable(anchor,spin, two_d=true, path=path) {
polygon(path);
children();
}
}
function mask2d_ogee(pattern, excess=0.01, anchor=CENTER, spin=0) =
assert(is_list(pattern))
assert(len(pattern)>0)
assert(len(pattern)%2==0,"pattern must be a list of TYPE, VAL pairs.")
assert(all([for (i = idx(pattern,step=2)) in_list(pattern[i],["step","xstep","ystep","round","fillet"])]))
let(
x = concat([0], cumsum([
for (i=idx(pattern,step=2)) let(
type = pattern[i],
val = pattern[i+1]
) (
type=="step"? val.x :
type=="xstep"? val :
type=="round"? val :
type=="fillet"? val :
0
)
])),
y = concat([0], cumsum([
for (i=idx(pattern,step=2)) let(
type = pattern[i],
val = pattern[i+1]
) (
type=="step"? val.y :
type=="ystep"? val :
type=="round"? val :
type=="fillet"? val :
0
)
])),
tot_x = last(x),
tot_y = last(y),
data = [
for (i=idx(pattern,step=2)) let(
type = pattern[i],
val = pattern[i+1],
pt = [x[i/2], tot_y-y[i/2]] + (
type=="step"? [val.x,-val.y] :
type=="xstep"? [val,0] :
type=="ystep"? [0,-val] :
type=="round"? [val,0] :
type=="fillet"? [0,-val] :
[0,0]
)
) [type, val, pt]
],
path = [
[tot_x,-excess],
[-excess,-excess],
[-excess,tot_y],
for (pat = data) each
pat[0]=="step"? [pat[2]] :
pat[0]=="xstep"? [pat[2]] :
pat[0]=="ystep"? [pat[2]] :
let(
r = pat[1],
steps = segs(abs(r)),
step = 90/steps
) [
for (i=[0:1:steps]) let(
a = pat[0]=="round"? (180+i*step) : (90-i*step)
) pat[2] + abs(r)*[cos(a),sin(a)]
]
],
path2 = deduplicate(path)
) reorient(anchor,spin, two_d=true, path=path2, p=path2);
// vim: expandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap
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