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masks.scad
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//////////////////////////////////////////////////////////////////////
// LibFile: masks.scad
// Masking shapes.
// Includes:
// include <BOSL2/std.scad>
//////////////////////////////////////////////////////////////////////
// Section: Chamfer Masks
// Module: chamfer_edge_mask()
// Usage:
// chamfer_edge_mask(l, chamfer, [excess]);
// Description:
// Creates a shape that can be used to chamfer a 90 degree 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 = Length of mask.
// 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#anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP`
// 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("mask")
// cube(50, center=true) {
// edge_mask(TOP+RIGHT)
// #chamfer_edge_mask(l=50, chamfer=10);
// }
module chamfer_edge_mask(l=1, chamfer=1, excess=0.1, anchor=CENTER, spin=0, orient=UP) {
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()
// Usage:
// chamfer_corner_mask(chamfer);
// Description:
// Creates a shape that can be used to chamfer a 90 degree 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#anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP`
// 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("mask")
// 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();
module chamfer_corner_mask(chamfer=1, anchor=CENTER, spin=0, orient=UP) {
octahedron(chamfer*4, anchor=anchor, spin=spin, orient=orient) children();
}
// Module: chamfer_cylinder_mask()
// Usage:
// chamfer_cylinder_mask(r|d, chamfer, [ang], [from_end])
// 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.
// d = Diameter of cylinder to chamfer. Use instead of r.
// chamfer = Size of the edge chamfered, inset from edge. (Default: 0.25)
// ang = Angle of chamfer in degrees from vertical. (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#anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP`
// 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: Masking by Attachment
module chamfer_cylinder_mask(r, d, chamfer=0.25, ang=45, from_end=false, anchor=CENTER, spin=0, orient=UP)
{
r = get_radius(r=r, d=d, dflt=1);
ch = from_end? chamfer : opp_ang_to_adj(chamfer,ang);
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()
// Usage:
// rounding_edge_mask(l|h, r|d)
// rounding_edge_mask(l|h, r1|d1, r2|d2)
// Description:
// Creates a shape that can be used to round a vertical 90 degree edge.
// Difference it from the object to be rounded. The center of the mask
// object should align exactly with the edge to be rounded.
// Arguments:
// l = Length of mask.
// r = Radius of the rounding.
// 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
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP`
// Example(VPD=200,VPR=[55,0,120]):
// rounding_edge_mask(l=50, r1=10, r2=25);
// Example:
// difference() {
// cube(size=100, center=false);
// #rounding_edge_mask(l=100, r=25, orient=UP, anchor=BOTTOM);
// }
// Example: Varying Rounding Radius
// difference() {
// cube(size=50, center=false);
// #rounding_edge_mask(l=50, r1=25, r2=10, orient=UP, anchor=BOTTOM);
// }
// Example: Masking by Attachment
// diff("mask")
// 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("mask")
// cube([80,90,100], center=true) {
// let(p = $parent_size*1.01) {
// edge_mask(TOP)
// rounding_edge_mask(l=p.z, r=25);
// }
// }
module rounding_edge_mask(l, r, r1, r2, d, d1, d2, excess=0.1, anchor=CENTER, spin=0, orient=UP, h=undef)
{
l = first_defined([l, h, 1]);
r1 = get_radius(r1=r1, r=r, d1=d1, d=d, dflt=1);
r2 = get_radius(r1=r2, r=r, d1=d2, d=d, dflt=1);
sides = quantup(segs(max(r1,r2)),4);
attachable(anchor,spin,orient, size=[2*r1,2*r1,l], size2=[2*r2,2*r2]) {
if (r1<r2) {
zflip() {
linear_extrude(height=l, convexity=4, center=true, scale=r1/r2) {
difference() {
translate(-excess*[1,1]) square(r2+excess);
translate([r2,r2]) circle(r=r2, $fn=sides);
}
}
}
} else {
linear_extrude(height=l, convexity=4, center=true, scale=r2/r1) {
difference() {
translate(-excess*[1,1]) square(r1+excess);
translate([r1,r1]) circle(r=r1, $fn=sides);
}
}
}
children();
}
}
// Module: rounding_corner_mask()
// Usage:
// rounding_corner_mask(r|d, [excess=], [style=]);
// Description:
// Creates a shape that you can use to round 90 degree 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.
// 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#anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP`
// Example:
// rounding_corner_mask(r=20.0);
// Example:
// 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("mask")
// cube(size=[50, 60, 70]) {
// corner_mask(TOP)
// #rounding_corner_mask(r=20);
// }
module rounding_corner_mask(r, d, style="octa", excess=0.1, anchor=CENTER, spin=0, orient=UP)
{
r = get_radius(r=r, d=d, dflt=1);
attachable(anchor,spin,orient, size=[2,2,2]*r) {
difference() {
translate(-excess*[1,1,1])
cube(size=r+excess, center=false);
translate([r,r,r])
sphere(r=r, style=style);
}
children();
}
}
// Module: rounding_angled_edge_mask()
// Usage:
// rounding_angled_edge_mask(h, r|d, [ang]);
// rounding_angled_edge_mask(h, r1|d1, r2|d2, [ang]);
// Description:
// Creates a vertical mask that can be used to round the edge where two face meet, at any arbitrary
// angle. Difference it from the object to be rounded. The center of the mask should align exactly
// with the edge to be rounded.
// Arguments:
// h = Height of vertical mask.
// r = Radius of the rounding.
// 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.
// ang = Angle that the planes meet at.
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP`
// Example:
// difference() {
// pie_slice(ang=70, h=50, d=100, center=true);
// #rounding_angled_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_angled_edge_mask(h=51, r1=10, r2=25, ang=70, $fn=32);
// }
module rounding_angled_edge_mask(h=1.0, r, r1, r2, d, d1, d2, ang=90, anchor=CENTER, spin=0, orient=UP)
{
function _mask_shape(r) = [
for (i = [0:1:n]) let (a=90+ang+i*sweep/n) [r*cos(a)+x, r*sin(a)+r],
for (i = [0:1:n]) let (a=90+i*sweep/n) [r*cos(a)+x, r*sin(a)-r],
[min(-1, r*cos(270-ang)+x-1), r*sin(270-ang)-r],
[min(-1, r*cos(90+ang)+x-1), r*sin(90+ang)+r],
];
sweep = 180-ang;
r1 = get_radius(r1=r1, r=r, d1=d1, d=d, dflt=1);
r2 = get_radius(r1=r2, r=r, d1=d2, d=d, dflt=1);
n = ceil(segs(max(r1,r2))*sweep/360);
x = sin(90-(ang/2))/sin(ang/2) * (r1<r2? r2 : r1);
if(r1<r2) {
attachable(anchor,spin,orient, size=[2*x*r1/r2,2*r1,h], size2=[2*x,2*r2]) {
zflip() {
linear_extrude(height=h, convexity=4, center=true, scale=r1/r2) {
polygon(_mask_shape(r2));
}
}
children();
}
} else {
attachable(anchor,spin,orient, size=[2*x,2*r1,h], size2=[2*x*r2/r1,2*r2]) {
linear_extrude(height=h, convexity=4, center=true, scale=r2/r1) {
polygon(_mask_shape(r1));
}
children();
}
}
}
// Module: rounding_angled_corner_mask()
// Usage:
// rounding_angled_corner_mask(r|d, ang);
// Description:
// Creates a shape that can be used to round the corner of an angle.
// Difference it from the object to be rounded. The center of the mask
// object should align exactly with the point of the corner to be rounded.
// Arguments:
// r = Radius of the rounding.
// d = Diameter of the rounding.
// ang = Angle between planes that you need to round the corner of.
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP`
// Example(Med):
// ang=60;
// difference() {
// pie_slice(ang=ang, h=50, r=200, center=true);
// up(50/2) #rounding_angled_corner_mask(r=20, ang=ang);
// }
module rounding_angled_corner_mask(r, ang=90, d, anchor=CENTER, spin=0, orient=UP)
{
r = get_radius(r=r, d=d, dflt=1);
dx = r / tan(ang/2);
dx2 = dx / cos(ang/2) + 1;
fn = quantup(segs(r), 4);
attachable(anchor,spin,orient, d=dx2, l=2*r) {
difference() {
down(r) cylinder(r=dx2, h=r+1, center=false);
yflip_copy() {
translate([dx, r, -r]) {
hull() {
sphere(r=r, $fn=fn);
down(r*3) sphere(r=r, $fn=fn);
zrot_copies([0,ang]) {
right(r*3) sphere(r=r, $fn=fn);
}
}
}
}
}
children();
}
}
// Module: rounding_cylinder_mask()
// 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. (Default: 1.0)
// d = Diameter of cylinder. (Default: 1.0)
// rounding = Radius of the edge rounding. (Default: 0.25)
// 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("mask")
// cyl(h=30, d=30) {
// attach(TOP)
// #rounding_cylinder_mask(d=30, rounding=5, $tags="mask");
// }
module rounding_cylinder_mask(r, rounding=0.25, d)
{
r = get_radius(r=r, d=d, dflt=1);
difference() {
cyl(r=r+rounding, l=rounding*2, anchor=CENTER);
cyl(r=r, l=rounding*3, rounding=rounding, anchor=TOP);
}
}
// Module: rounding_hole_mask()
// Usage:
// rounding_hole_mask(r|d, rounding, [excess]);
// 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.
// d = Diameter of hole to rounding.
// rounding = Radius of the rounding. (Default: 0.25)
// excess = The extra thickness of the mask. Default: `0.1`.
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP`
// Example:
// rounding_hole_mask(r=40, rounding=20, $fa=2, $fs=2);
// Example(Med):
// difference() {
// cube([150,150,100], center=true);
// cylinder(r=50, h=100.1, center=true);
// up(50) #rounding_hole_mask(r=50, rounding=10);
// }
// Example(Med):
// difference() {
// cube([150,150,100], center=true);
// cylinder(r=50, h=100.1, center=true);
// up(50) rounding_hole_mask(r=50, rounding=10);
// }
module rounding_hole_mask(r, rounding=0.25, excess=0.1, d, anchor=CENTER, spin=0, orient=UP)
{
r = get_radius(r=r, d=d, dflt=1);
attachable(anchor,spin,orient, r=r+rounding, l=2*rounding) {
rotate_extrude(convexity=4) {
difference() {
right(r-excess) fwd(rounding) square(rounding+excess, center=false);
right(r+rounding) fwd(rounding) circle(r=rounding);
}
}
children();
}
}
// Section: Teardrop Masking
// Module: teardrop_edge_mask()
// Usage:
// teardrop_edge_mask(r|d, [angle], [excess]);
// Description:
// Makes an apropriate 3D corner rounding mask that keeps within `angle` degrees of vertical.
// Arguments:
// r = Radius of the mask rounding.
// d = Diameter of the mask rounding.
// angle = Maximum angle from vertical. Default: 45
// excess = Excess mask size. Default: 0.1
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP`
// Example(VPD=50,VPR=[55,0,120]):
// teardrop_edge_mask(l=20, r=10, angle=40);
// Example(VPD=300,VPR=[75,0,25]):
// diff("mask")
// cuboid([50,60,70],rounding=10,edges="Z",anchor=CENTER) {
// edge_mask(BOT)
// teardrop_edge_mask(l=max($parent_size)+1, r=10, angle=40);
// corner_mask(BOT)
// teardrop_corner_mask(r=10, angle=40);
// }
module teardrop_edge_mask(l, r, angle, excess=0.1, d, anchor=CENTER, spin=0, orient=UP) {
assert(is_num(l));
assert(is_num(angle));
assert(is_num(excess));
assert(angle>0 && angle<90);
r = get_radius(r=r, d=d, dflt=1);
difference() {
translate(-[1,1,0]*excess) cube([r+excess,r+excess,l], anchor=FWD+LEFT);
translate([r,r,0]) teardrop(r=r, l=l+1, cap_h=r, ang=angle, orient=FWD);
}
}
// Module: teardrop_corner_mask()
// Usage:
// teardrop_corner_mask(r|d, [angle], [excess]);
// Description:
// Makes an apropriate 3D corner rounding mask that keeps within `angle` degrees of vertical.
// Arguments:
// r = Radius of the mask rounding.
// d = Diameter of the mask rounding.
// angle = Maximum angle from vertical. Default: 45
// excess = Excess mask size. Default: 0.1
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP`
// Example:
// teardrop_corner_mask(r=20, angle=40);
// Example:
// diff("mask")
// 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);
// }
module teardrop_corner_mask(r, angle, excess=0.1, d, anchor=CENTER, 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);
difference() {
translate(-[1,1,1]*excess) cube(r+excess, center=false);
translate([1,1,1]*r) onion(r=r, ang=angle, orient=DOWN);
}
}
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