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BOSL2/masks3d.scad

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//////////////////////////////////////////////////////////////////////
// LibFile: masks3d.scad
// This file defines 3D masks for applying chamfers, roundovers, and teardrop roundovers to straight edges and circular
// edges in three dimensions.
// Includes:
// include <BOSL2/std.scad>
// FileGroup: Basic Modeling
// FileSummary: 3D masks for rounding or chamfering edges and corners.
// FileFootnotes: STD=Included in std.scad
//////////////////////////////////////////////////////////////////////
// Section: Chamfer Masks
// Module: chamfer_edge_mask()
// Synopsis: Creates a shape to chamfer a 90° edge.
// SynTags: Geom
// Topics: Masking, Chamfers, Shapes (3D)
// See Also: chamfer_corner_mask(), chamfer_cylinder_mask(), chamfer_edge_mask(), default_tag(), diff()
// Usage:
// chamfer_edge_mask(l|h=|length=|height=, chamfer, [excess]) [ATTACHMENTS];
// Description:
// Creates a shape that can be used to chamfer a 90° edge.
// Difference it from the object to be chamfered. The center of
// the mask object should align exactly with the edge to be chamfered.
// Arguments:
// l/h/length/height = Length of mask. Default: $edge_length if defined
// chamfer = Size of chamfer.
// excess = The extra amount to add to the length of the mask so that it differences away from other shapes cleanly. Default: `0.1`
// ---
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#subsection-orient). Default: `UP`
// Side Effects:
// Tags the children with "remove" (and hence sets `$tag`) if no tag is already set.
// Example:
// chamfer_edge_mask(l=50, chamfer=10);
// Example:
// difference() {
// cube(50, anchor=BOTTOM+FRONT);
// #chamfer_edge_mask(l=50, chamfer=10, orient=RIGHT);
// }
// Example: Masking by Attachment
// diff()
// cube(50, center=true) {
// edge_mask(TOP+RIGHT)
// #chamfer_edge_mask(l=50, chamfer=10);
// }
function chamfer_edge_mask(l, chamfer=1, excess=0.1, h, length, height, anchor=CENTER, spin=0, orient=UP) = no_function("chamfer_edge_mask");
module chamfer_edge_mask(l, chamfer=1, excess=0.1, h, length, height, anchor=CENTER, spin=0, orient=UP) {
l = is_def($edge_length) && !any_defined([l,length,h,height]) ? $edge_length
: one_defined([l,length,h,height],"l,length,h,height");
default_tag("remove") {
attachable(anchor,spin,orient, size=[chamfer*2, chamfer*2, l]) {
cylinder(r=chamfer, h=l+excess, center=true, $fn=4);
children();
}
}
}
// Module: chamfer_corner_mask()
// Synopsis: Creates a shape to chamfer a 90° corner.
// SynTags: Geom
// Topics: Masking, Chamfers, Shapes (3D)
// See Also: chamfer_corner_mask(), chamfer_cylinder_mask(), chamfer_edge_mask(), default_tag(), diff()
// Usage:
// chamfer_corner_mask(chamfer) [ATTACHMENTS];
// Description:
// Creates a shape that can be used to chamfer a 90° corner.
// Difference it from the object to be chamfered. The center of
// the mask object should align exactly with the corner to be chamfered.
// Arguments:
// chamfer = Size of chamfer.
// ---
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#subsection-orient). Default: `UP`
// Side Effects:
// Tags the children with "remove" (and hence sets `$tag`) if no tag is already set.
// Example:
// chamfer_corner_mask(chamfer=10);
// Example:
// difference() {
// cuboid(50, chamfer=10, trimcorners=false);
// move(25*[1,-1,1]) #chamfer_corner_mask(chamfer=10);
// }
// Example: Masking by Attachment
// diff()
// cuboid(100, chamfer=20, trimcorners=false) {
// corner_mask(TOP+FWD+RIGHT)
// chamfer_corner_mask(chamfer=20);
// }
// Example: Anchors
// chamfer_corner_mask(chamfer=20)
// show_anchors();
function chamfer_corner_mask(chamfer=1, anchor=CENTER, spin=0, orient=UP) = no_function("chamfer_corner_mask");
module chamfer_corner_mask(chamfer=1, anchor=CENTER, spin=0, orient=UP) {
default_tag("remove") {
octahedron(chamfer*4, anchor=anchor, spin=spin, orient=orient) children();
}
}
// Module: chamfer_cylinder_mask()
// Synopsis: Creates a shape to chamfer the end of a cylinder.
// SynTags: Geom
// Topics: Masking, Chamfers, Cylinders
// See Also: chamfer_corner_mask(), chamfer_cylinder_mask(), chamfer_edge_mask(), default_tag(), diff()
// Usage:
// chamfer_cylinder_mask(r|d=, chamfer, [ang], [from_end]) [ATTACHMENTS];
// Description:
// Create a mask that can be used to bevel/chamfer the end of a cylindrical region.
// Difference it from the end of the region to be chamfered. The center of the mask
// object should align exactly with the center of the end of the cylindrical region
// to be chamfered.
// Arguments:
// r = Radius of cylinder to chamfer.
// chamfer = Size of the edge chamfered, inset from edge.
// ---
// d = Diameter of cylinder to chamfer. Use instead of r.
// ang = Angle of chamfer in degrees from the horizontal. (Default: 45)
// from_end = If true, chamfer size is measured from end of cylinder. If false, chamfer is measured outset from the radius of the cylinder. (Default: false)
// 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`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#subsection-orient). Default: `UP`
// Side Effects:
// Tags the children with "remove" (and hence sets `$tag`) if no tag is already set.
// Example:
// difference() {
// cylinder(r=50, h=100, center=true);
// up(50) #chamfer_cylinder_mask(r=50, chamfer=10);
// }
// Example:
// difference() {
// cylinder(r=50, h=100, center=true);
// up(50) chamfer_cylinder_mask(r=50, chamfer=10);
// }
// Example: Changing the chamfer angle
// difference() {
// cylinder(r=50, h=100, center=true);
// up(50) #chamfer_cylinder_mask(r=50, chamfer=10, ang=70);
// }
// Example:
// difference() {
// cylinder(r=50, h=100, center=true);
// up(50) chamfer_cylinder_mask(r=50, chamfer=10, ang=70);
// }
// Example: Masking by Attachment
// diff()
// cyl(d=100,h=40)
// attach([TOP,BOT])
// tag("remove")chamfer_cylinder_mask(d=100, chamfer=10);
function chamfer_cylinder_mask(r, chamfer, d, ang=45, from_end=false, anchor=CENTER, spin=0, orient=UP) = no_function("chamfer_cylinder_mask");
module chamfer_cylinder_mask(r, chamfer, d, ang=45, from_end=false, anchor=CENTER, spin=0, orient=UP)
{
r = get_radius(r=r, d=d, dflt=1);
dummy = assert(all_nonnegative([chamfer]), "Chamfer must be a nonnegative number");
ch = from_end? chamfer : opp_ang_to_adj(chamfer,90-ang);
default_tag("remove"){
attachable(anchor,spin,orient, r=r, l=ch*2) {
difference() {
cyl(r=r+chamfer, l=ch*2, anchor=CENTER);
cyl(r=r, l=ch*3, chamfer=chamfer, chamfang=ang, from_end=from_end, anchor=TOP);
}
children();
}
}
}
// Section: Rounding Masks
// Module: rounding_edge_mask()
// Synopsis: Creates a shape to round a 90° edge.
// SynTags: Geom
// Topics: Masks, Rounding, Shapes (3D)
// See Also: edge_profile(), rounding_corner_mask(), default_tag(), diff()
// Usage:
// rounding_edge_mask(l|h=|length=|height=, r|d=, [ang], [excess=], [rounding=|chamfer=], ) [ATTACHMENTS];
// rounding_edge_mask(l|h=|length=|height=, r1=|d1=, r2=|d2=, [ang=], [excess=], [rounding=|chamfer=]) [ATTACHMENTS];
// Description:
// Creates a mask shape that can be used to round a straight edge at any angle, with
// different rounding radii at each end. The corner of the mask appears on the Z axis with one face on the XZ plane.
// You must align the mask corner with the edge you want to round. If your parent object is a cuboid, the easiest way to
// do this is to use {{diff()}} and {{edge_mask()}}. However, this method is somewhat inflexible regarding orientation of a tapered
// mask, and it does not support other parent shapes. You can attach the mask to a larger range of shapes using
// {{attach()}} to anchor the `LEFT+FWD` anchor of the mask to a desired corner on the parent with `inside=true`.
// Many shapes propagate `$edge_angle` and `$edge_length` which can aid in configuring the mask, and you can adjust the
// mask as needed to align the taper as desired. The default "remove" tag is set so {{diff()}} will automatically difference
// away the mask. You can of course also position the mask manually and use `difference()`.
// .
// For mating with other roundings or chamfers on cuboids or regular prisms, you can choose end roundings and end chamfers. These affect
// only the curved edge of the mask ends and will only work if the terminating face is perpendicular to the masked edge. The `excess`
// parameter will add extra length to the mask when you use these settings.
//
// Arguments:
// l/h/length/height = Length of mask. Default: $edge_length if defined
// r = Radius of the rounding.
// ang = Angle between faces for rounding. Default: $edge_angle if defined, otherwise 90
// ---
// r1 = Bottom radius of rounding.
// r2 = Top radius of rounding.
// d = Diameter of the rounding.
// d1 = Bottom diameter of rounding.
// d2 = Top diameter of rounding.
// excess = Extra size for the mask. Defaults: 0.1
// rounding = Radius of roundong along ends. Default: 0
// rounding1 = Radius of rounding along bottom end
// rounding2 = Radius of rounding along top end
// chamfer = Chamfer size of end chamfers. Default: 0
// chamfer1 = Chamfer size of chamfer at bottom end
// chamfer2 = Chamfer size of chamfer at top end
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#subsection-orient). Default: `UP`
// Side Effects:
// Tags the children with "remove" (and hence sets `$tag`) if no tag is already set.
// Example(VPD=200,VPR=[55,0,120]):
// rounding_edge_mask(l=50, r=15);
// Example(VPD=200,VPR=[55,0,120]): With different radii at each end
// rounding_edge_mask(l=50, r1=10, r2=25);
// Example(VPD=200,VPR=[55,0,120]): Acute angle
// rounding_edge_mask(l=50, r=10, ang=45);
// Example(VPD=200,VPR=[55,0,120]): A large excess
// rounding_edge_mask(l=50, r=15,excess=4);
// Example: Subtracting from a cube
// difference() {
// cube(size=100, center=false);
// #rounding_edge_mask(l=100, r=25, anchor=BOTTOM);
// }
// Example: Varying Rounding Radius
// difference() {
// cube(size=50, center=false);
// down(1)rounding_edge_mask(l=52, r1=25, r2=10, anchor=BOTTOM);
// }
// Example: Angle not 90 degrees
// difference() {
// pie_slice(ang=70, h=50, d=100, center=true);
// #rounding_edge_mask(h=51, r=20.0, ang=70, $fn=32);
// }
// Example: Varying Rounding Radius
// difference() {
// pie_slice(ang=70, h=50, d=100, center=true);
// #rounding_edge_mask(h=51, r1=10, r2=25, ang=70, $fn=32);
// }
// Example: Rounding a non-right angled edge, with a zero radius at the bottom.
// difference(){
// linear_extrude(height=50)xflip(x=25)right_triangle([50,50]);
// rounding_edge_mask(l=51, ang=45, r1=0, r2=15, anchor=BOT);
// }
// Example: Masking by Attachment
// diff()
// cube(100, center=true)
// edge_mask(FRONT+RIGHT)
// #rounding_edge_mask(l=$parent_size.z+0.01, r=25);
// Example: Multiple Masking by Attachment
// diff()
// cube([80,90,100], center=true) {
// let(p = $parent_size*1.01) {
// edge_mask(TOP)
// rounding_edge_mask(l=p.z, r=25);
// }
// }
// Example(3D,VPT=[5.02872,6.37039,-0.503894],VPR=[75.3,0,107.4],VPD=74.4017): Mask shape with end rounding at the top, chamfer at the bottom, and a large excess value:
// rounding_edge_mask(r=10,h=20, chamfer1=3, rounding2=3, excess=1);
// Example(3D,VPT=[1.05892,1.10442,2.20513],VPR=[60.6,0,118.1],VPD=74.4017): Attaching masks using {{attach()}} with automatic angle and length from the parent. Note that sometimes the automatic length is too short because it is the length of the edge itself.
// diff()
// prismoid([20,30],[12,19], h=10,shift=[4,7])
// attach([TOP+RIGHT,RIGHT+FRONT],LEFT+FWD,inside=true)
// rounding_edge_mask(r1=2,r2=4);
// Example(3D): The mask does not need to be the full length of the edge
// diff()
// cuboid(20)
// attach(RIGHT+TOP,LEFT+FWD,inside=true,inset=-.1,align=FWD)
// rounding_edge_mask(r1=0,r2=10,length=10);
function rounding_edge_mask(l, r, ang=90, r1, r2, d, d1, d2, excess=0.1, anchor=CENTER, spin=0, orient=UP, h,height,length) = no_function("rounding_edge_mask");
module rounding_edge_mask(l, r, ang, r1, r2, excess=0.01, d1, d2,d,r,length, h, height, anchor=CENTER, spin=0, orient=UP,
rounding,rounding1,rounding2,chamfer,chamfer1,chamfer2,
_remove_tag=true)
{
ang = first_defined([ang,$edge_angle,90]);
length = is_def($edge_length) && !any_defined([l,length,h,height]) ? $edge_length
: one_defined([l,length,h,height],"l,length,h,height");
r1 = get_radius(r1=r1, d1=d1,d=d,r=r);
r2 = get_radius(r2=r2, d1=d2,d=d,r=r);
dummy1 = assert(num_defined([chamfer,rounding])<2, "Cannot give both rounding and chamfer")
assert(num_defined([chamfer1,rounding1])<2, "Cannot give both rounding1 and chamfer1")
assert(num_defined([chamfer2,rounding2])<2, "Cannot give both rounding2 and chamfer2");
rounding1 = first_defined([rounding1,rounding,0]);
rounding2 = first_defined([rounding2,rounding,0]);
chamfer1 = first_defined([chamfer1,chamfer,0]);
chamfer2 = first_defined([chamfer2,chamfer,0]);
dummy = assert(all_nonnegative([r1,r2]), "radius/diameter value(s) must be nonnegative")
assert(all_positive([length]), "length/l/h/height must be a positive value")
assert(is_finite(ang) && ang>0 && ang<180, "ang must be a number between 0 and 180")
assert(all_nonnegative([chamfer1,chamfer2,rounding1,rounding2]), "chamfers and roundings must be nonnegative");
steps = ceil(segs(max(r1,r2))*(180-ang)/360);
function make_path(r) =
r==0 ? repeat([0,0],steps+1)
: arc(n=steps+1, r=r, corner=[polar_to_xy(r,ang),[0,0],[r,0]]);
path1 = path3d(make_path(r1),-length/2);
path2 = path3d(make_path(r2),length/2);
function getarc(bigr,r,chamfer,p1,p2,h,print=false) =
r==0 && chamfer==0? [p2]
:
let(
steps = ceil(segs(r)/4)+1,
center = [bigr/tan(ang/2), bigr,h],
refplane = plane_from_normal([-(p2-center).y, (p2-center).x, 0], p2),
refnormal = plane_normal(refplane),
mplane = plane3pt(p2,p1,center),
A = plane_normal(mplane),
basept = lerp(p2,p1,max(r,chamfer)/2/h),
corner = [basept+refnormal*(refplane[3]-basept*refnormal)/(refnormal*refnormal),
p2,
center],
bare_arc = chamfer ? [p2+chamfer*unit(corner[0]-corner[1]),p2+chamfer*unit(corner[2]-corner[1])]
: arc(r=r, corner = corner, n=steps),
arc_with_excess = [each bare_arc, up(excess, last(bare_arc))],
arc = [for(pt=arc_with_excess) pt+refnormal*(mplane[3]-pt*A)/(refnormal*A)]
)
arc;
cp = [-excess/tan(ang/2), -excess];
extra1 = rounding1 || chamfer1 ? [0,0,excess] : CTR;
extra2 = rounding2 || chamfer2 ? [0,0,excess] : CTR;
pathlist = [for(i=[0:len(path1)-1])
let(
path = [
if (i==0) move(polar_to_xy( excess, 90+ang),path1[i]-extra1)
else if (i==len(path1)-1) fwd(excess,last(path1)-extra1)
else point3d(cp,-length/2-extra1.z),
each reverse(zflip(getarc(r1,rounding1,chamfer1,zflip(path2[i]), zflip(path1[i]),length/2))),
each getarc(r2,rounding2,chamfer2,path1[i],path2[i],length/2,print=rounding2!=0&&!is_undef(rounding2)&&i==3),
if (i==0) move(polar_to_xy( excess, 90+ang),path2[i]+extra2)
else if (i==len(path2)-1) fwd(excess,last(path2)+extra2)
else point3d(cp, length/2+extra2.z),
]
)
path];
left_normal = cylindrical_to_xyz(1,90+ang,0);
left_dir = cylindrical_to_xyz(1,ang,0);
zdir = unit([length, 0,-(r2-r1)/tan(ang/2)]);
cutfact = 1/sin(ang/2)-1;
v=unit(zrot(ang,zdir)+left_normal);
ref = UP - (v*UP)*v;
backleft_spin=-vector_angle(rot(from=UP,to=v,p=BACK),ref);
override = [
[CENTER, [CENTER,UP]],
[TOP, [[0,0,length/2]]],
[BOT, [[0,0,-length/2]]],
[FWD, [[(r1+r2)/tan(ang/2)/4,0,0]]],
[FWD+BOT, [[r1/tan(ang/2)/2,0,-length/2]]],
[FWD+TOP, [[r2/tan(ang/2)/2,0,length/2]]],
[LEFT, [(r1+r2)/tan(ang/2)/4*left_dir, left_normal,ang-180]],
[LEFT+BOT, [down(length/2,r1/tan(ang/2)/2*left_dir), rot(v=left_dir,-45,p=left_normal),ang-180]],
[LEFT+TOP, [up(length/2,r2/tan(ang/2)/2*left_dir), rot(v=left_dir, 45, p=left_normal),ang-180]],
[LEFT+FWD, [CENTER, left_normal+FWD,ang/2-90]],
[LEFT+FWD+TOP, [[0,0,length/2], left_normal+FWD+UP,ang/2-90]],
[LEFT+FWD+BOT, [[0,0,-length/2], left_normal+FWD+DOWN,ang/2-90]],
[RIGHT, [[(r1+r2)/2/tan(ang/2),0,0],zdir]],
[RIGHT+TOP, [[r2/tan(ang/2),0,length/2],zdir+UP]],
[RIGHT+BOT, [[r1/tan(ang/2),0,-length/2],zdir+DOWN]],
[RIGHT+FWD, [[(r1+r2)/2/tan(ang/2),0,0],zdir+FWD]],
[RIGHT+TOP+FWD, [[r2/tan(ang/2),0,length/2],zdir+UP+FWD]],
[RIGHT+BOT+FWD, [[r1/tan(ang/2),0,-length/2],zdir+DOWN+FWD]],
[BACK, [ (r1+r2)/2/tan(ang/2)*left_dir,zrot(ang,zdir),ang+90]],
[BACK+BOT, [ down(length/2,r1/tan(ang/2)*left_dir),zrot(ang,zdir)+DOWN,ang+90]],
[BACK+UP, [ up(length/2,r2/tan(ang/2)*left_dir),zrot(ang,zdir)+UP,ang+90]],
[BACK+LEFT, [ (r1+r2)/2/tan(ang/2)*left_dir,zrot(ang,zdir)+left_normal, backleft_spin]],
[BACK+BOT+LEFT, [ down(length/2,r1/tan(ang/2)*left_dir),zrot(ang,zdir)+left_normal+DOWN,backleft_spin]],
[BACK+UP+LEFT, [ up(length/2,r2/tan(ang/2)*left_dir),zrot(ang,zdir)+left_normal+UP,backleft_spin]],
[BACK+RIGHT, [cylindrical_to_xyz(cutfact*(r1+r2)/2,ang/2,0), zrot(ang/2,zdir),ang/2+90]],
[BACK+RIGHT+TOP, [cylindrical_to_xyz(cutfact*r2,ang/2,length/2), zrot(ang/2,zdir)+UP,ang/2+90]],
[BACK+RIGHT+BOT, [cylindrical_to_xyz(cutfact*r1,ang/2,-length/2), zrot(ang/2,zdir)+DOWN,ang/2+90]],
];
vnf = vnf_vertex_array(reverse(pathlist), col_wrap=true,caps=true);
default_tag("remove", _remove_tag)
attachable(anchor,spin,orient,size=[1,1,length],override=override){
vnf_polyhedron(vnf);
children();
}
}
// Module: rounding_corner_mask()
// Synopsis: Creates a shape to round 90° corners.
// SynTags: Geom
// Topics: Masking, Rounding, Shapes (3D)
// See Also: rounding_edge_mask(), default_tag(), diff()
// Usage:
// rounding_corner_mask(r|d, [ang], [excess=], [style=]) [ATTACHMENTS];
// Description:
// Creates a shape that you can use to round corners where the top and bottom faces are parallel and the two side
// faces are perpendicular to the top and bottom, e.g. cubes or pie_slice corners.
// Difference it from the object to be rounded. The center of the mask
// object should align exactly with the corner to be rounded.
// Arguments:
// r = Radius of corner rounding.
// ang = Angle of corner (measured around the z axis). Default: 90
// ---
// d = Diameter of corner rounding.
// excess = Extra size for the mask. Defaults: 0.1
// style = The style of the sphere cutout's construction. One of "orig", "aligned", "stagger", "octa", or "icosa". Default: "octa"
// 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`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#subsection-orient). Default: `UP`
// Side Effects:
// Tags the children with "remove" (and hence sets `$tag`) if no tag is already set.
// Example:
// rounding_corner_mask(r=20);
// Example: Adding a huge excess
// rounding_corner_mask(r=20, excess=5);
// Example: Position masks manually
// difference() {
// cube(size=[50, 60, 70], center=true);
// translate([-25, -30, 35])
// #rounding_corner_mask(r=20, spin=90, orient=DOWN);
// translate([25, -30, 35])
// #rounding_corner_mask(r=20, orient=DOWN);
// translate([25, -30, -35])
// #rounding_corner_mask(r=20, spin=90);
// }
// Example: Masking by Attachment
// diff()
// cube(size=[50, 60, 70]) {
// corner_mask(TOP)
// #rounding_corner_mask(r=20);
// }
// Example(VPR=[71.8,0,345.8],VPT=[57.0174,43.8496,24.5863],VPD=263.435,NoScales): Acute angle
// ang=60;
// difference() {
// pie_slice(ang=ang, h=50, r=100);
// zflip_copy(z=25)
// #rounding_corner_mask(r=20, ang=ang);
// }
// Example(VPR=[62.7,0,5.4],VPT=[6.9671,22.7592,20.7513],VPD=192.044): Obtuse angle
// ang=120;
// difference() {
// pie_slice(ang=ang, h=50, r=30);
// zflip_copy(z=25)
// #rounding_corner_mask(r=20, ang=ang);
// }
function rounding_corner_mask(r, ang, d, style="octa", excess=0.1, anchor=CENTER, spin=0, orient=UP) = no_function("rounding_corner_mask");
module rounding_corner_mask(r, ang=90, d, style="octa", excess=0.1, anchor=CENTER, spin=0, orient=UP)
{
r = get_radius(r=r, d=d, dflt=1);
joint = r/tan(ang/2);
path = [
[joint,r],
[joint,-excess],
[-excess/tan(ang/2),-excess],
polar_to_xy(joint,ang)+polar_to_xy(excess,90+ang)
];
default_tag("remove") {
attachable(anchor,spin,orient, size=[2,2,2]*r) {
difference() {
down(excess)
linear_extrude(height=r+excess) polygon(path);
translate([joint,r,r])
spheroid(r=r, style=style);
}
children();
}
}
}
function rounding_angled_edge_mask(h, r, r1, r2, d, d1, d2, ang=90, anchor=CENTER, spin=0, orient=UP,l,height,length) = no_function("rounding_angled_edge_mask");
module rounding_angled_edge_mask(h, r, r1, r2, d, d1, d2, ang=90, anchor=CENTER, spin=0, orient=UP,l,height,length)
{
deprecate("angled_edge_mask");
rounding_edge_mask(h=h,r=r,r1=r1,r2=r2,d=d,d1=d1,d2=d1,ang=ang,anchor=anchor,spin=spin,orient=orient,l=l,height=height,length=length)
children();
}
function rounding_angled_corner_mask(r, ang=90, d, anchor=CENTER, spin=0, orient=UP) = no_function("rounding_angled_corner_mask");
module rounding_angled_corner_mask(r, ang=90, d, anchor=CENTER, spin=0, orient=UP)
{
deprecate("rounding_corner_mask");
zflip()rounding_corner_mask(r=r,ang=ang,d=d,anchor=anchor,spin=spin,orient=orient)
children();
}
// Module: rounding_cylinder_mask()
// Synopsis: Creates a shape to round the end of a cylinder.
// SynTags: Geom
// Topics: Masking, Rounding, Cylinders
// See Also: rounding_hole_mask(), rounding_corner_mask(), default_tag(), diff()
// Usage:
// rounding_cylinder_mask(r|d=, rounding);
// Description:
// Create a mask that can be used to round the end of a cylinder.
// Difference it from the cylinder to be rounded. The center of the
// mask object should align exactly with the center of the end of the
// cylinder to be rounded.
// Arguments:
// r = Radius of cylinder.
// rounding = Radius of the edge rounding.
// ---
// d = Diameter of cylinder.
// 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`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#subsection-orient). Default: `UP`
// Side Effects:
// Tags the children with "remove" (and hence sets `$tag`) if no tag is already set.
// Example:
// difference() {
// cylinder(r=50, h=50, center=false);
// up(50) #rounding_cylinder_mask(r=50, rounding=10);
// }
// Example:
// difference() {
// cylinder(r=50, h=50, center=false);
// up(50) rounding_cylinder_mask(r=50, rounding=10);
// }
// Example: Masking by Attachment
// diff()
// cyl(h=30, d=30) {
// attach(TOP)
// #tag("remove")
// rounding_cylinder_mask(d=30, rounding=5);
// }
function rounding_cylinder_mask(r, rounding, d, anchor, spin, orient) = no_function("rounding_cylinder_mask");
module rounding_cylinder_mask(r, rounding, d, anchor=CENTER, spin=0, orient=UP)
{
r = get_radius(r=r, d=d, dflt=1);
default_tag("remove") {
attachable(anchor,spin,orient, r=r+rounding, l=rounding*2) {
difference() {
cyl(r=r+rounding, l=rounding*2, anchor=CENTER);
cyl(r=r, l=rounding*3, rounding=rounding, anchor=TOP);
}
children();
}
}
}
// Module: rounding_hole_mask()
// Synopsis: Creates a shape to round the edge of a round hole.
// SynTags: Geom
// Topics: Masking, Rounding
// See Also: rounding_cylinder_mask(), rounding_hole_mask(), rounding_corner_mask(), default_tag(), diff()
// Usage:
// rounding_hole_mask(r|d, rounding, [excess]) [ATTACHMENTS];
// Description:
// Create a mask that can be used to round the edge of a circular hole.
// Difference it from the hole to be rounded. The center of the
// mask object should align exactly with the center of the end of the
// hole to be rounded.
// Arguments:
// r = Radius of hole.
// rounding = Radius of the rounding.
// excess = The extra thickness of the mask. Default: `0.1`.
// ---
// d = Diameter of hole to 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`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#subsection-orient). Default: `UP`
// Side Effects:
// Tags the children with "remove" (and hence sets `$tag`) if no tag is already set.
// Example:
// rounding_hole_mask(r=40, rounding=20, $fa=2, $fs=2);
// Example(Med):
// difference() {
// cube([150,150,100], center=true);
// cylinder(r=50, h=100.1, center=true);
// up(50) #rounding_hole_mask(r=50, rounding=10);
// }
// Example(Med):
// difference() {
// cube([150,150,100], center=true);
// cylinder(r=50, h=100.1, center=true);
// up(50) rounding_hole_mask(r=50, rounding=10);
// }
function rounding_hole_mask(r, rounding, excess=0.1, d, anchor=CENTER, spin=0, orient=UP) = no_function("rounding_hole_mask");
module rounding_hole_mask(r, rounding, excess=0.1, d, anchor=CENTER, spin=0, orient=UP)
{
r = get_radius(r=r, d=d, dflt=1);
default_tag("remove") {
attachable(anchor,spin,orient, r=r+rounding, l=2*rounding) {
rotate_extrude(convexity=4) {
difference() {
right(r-excess) fwd(rounding) square(rounding+excess, center=false);
right(r+rounding) fwd(rounding) circle(r=rounding);
}
}
children();
}
}
}
// Section: Teardrop Masking
// Module: teardrop_edge_mask()
// Synopsis: Creates a shape to round a 90° edge but limit the angle of overhang.
// SynTags: Geom
// Topics: Masking, Rounding, Shapes (3D), FDM Optimized
// See Also: teardrop_corner_mask(), teardrop_edge_mask(), default_tag(), diff()
// Usage:
// teardrop_edge_mask(l|h=|length=|height=, r|d=, [angle], [excess], [anchor], [spin], [orient]) [ATTACHMENTS];
// Description:
// Makes an apropriate 3D edge rounding mask that keeps within `angle` degrees of vertical.
// Arguments:
// l/h/length/height = length of mask
// r = Radius of the mask rounding.
// angle = Maximum angle from vertical. Default: 45
// excess = Excess mask size. Default: 0.1
// ---
// d = Diameter of the mask 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`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#subsection-orient). Default: `UP`
// Side Effects:
// Tags the children with "remove" (and hence sets `$tag`) if no tag is already set.
// Example(VPD=50,VPR=[55,0,120]):
// teardrop_edge_mask(l=20, r=10, angle=40);
// Example(VPD=300,VPR=[75,0,25]):
// diff()
// cuboid([50,60,70],rounding=10,edges="Z",anchor=CENTER) {
// edge_mask(BOT)
// teardrop_edge_mask(l=max($parent_size)+1, r=10, angle=40);
// corner_mask(BOT)
// teardrop_corner_mask(r=10, angle=40);
// }
function teardrop_edge_mask(l, r, angle=45, excess=0.1, d, anchor, spin, orient,h,height,length) = no_function("teardrop_edge_mask");
module teardrop_edge_mask(l, r, angle=45, excess=0.1, d, anchor=CTR, spin=0, orient=UP,h,height,length)
{
l = one_defined([l, h, height, length], "l,h,height,length");
check =
assert(is_num(l) && l>0, "Length of mask must be positive")
assert(is_num(angle) && angle>0 && angle<90, "Angle must be a number between 0 and 90")
assert(is_num(excess));
r = get_radius(r=r, d=d, dflt=1);
path = mask2d_teardrop(r=r, angle=angle, excess=excess);
default_tag("remove") {
linear_sweep(path, height=l, center=true, atype="bbox", anchor=anchor, spin=spin, orient=orient) children();
}
}
// Module: teardrop_corner_mask()
// Synopsis: Creates a shape to round a 90° corner but limit the angle of overhang.
// SynTags: Geom
// Topics: Masking, Rounding, Shapes (3D), FDM Optimized
// See Also: teardrop_corner_mask(), teardrop_edge_mask(), default_tag(), diff()
// Usage:
// teardrop_corner_mask(r|d=, [angle], [excess], [anchor], [spin], [orient]) [ATTACHMENTS];
// Description:
// Makes an apropriate 3D corner rounding mask that keeps within `angle` degrees of vertical.
// Arguments:
// r = Radius of the mask rounding.
// angle = Maximum angle from vertical. Default: 45
// excess = Excess mask size. Default: 0.1
// ---
// d = Diameter of the mask rounding.
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#subsection-orient). Default: `UP`
// Side Effects:
// Tags the children with "remove" (and hence sets `$tag`) if no tag is already set.
// Example:
// teardrop_corner_mask(r=20, angle=40);
// Example:
// diff()
// cuboid([50,60,70],rounding=10,edges="Z",anchor=CENTER) {
// edge_profile(BOT)
// mask2d_teardrop(r=10, angle=40);
// corner_mask(BOT)
// teardrop_corner_mask(r=10, angle=40);
// }
function teardrop_corner_mask(r, angle=45, excess=0.1, d, anchor, spin, orient) = no_function("teardrop_corner_mask");
module teardrop_corner_mask(r, angle=45, excess=0.1, d, anchor=CTR, spin=0, orient=UP)
{
assert(is_num(angle));
assert(is_num(excess));
assert(angle>0 && angle<90);
r = get_radius(r=r, d=d, dflt=1);
size = (r+excess) * [1,1,1];
midpt = (r-excess)/2 * [1,1,1];
default_tag("remove") {
attachable(anchor,spin,orient, size=size, offset=midpt) {
difference() {
translate(-[1,1,1]*excess) cube(r+excess, center=false);
translate([1,1,1]*r) onion(r=r, ang=angle, orient=DOWN);
}
children();
}
}
}
// vim: expandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap
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