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Added negative roundings/chamfers to rect() and trapezoid(). Added teardrop= to cuboid()

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Garth Minette
2022-01-16 23:30:13 -08:00
parent 478bf12ea7
commit e09a6cd6dd
2 changed files with 135 additions and 58 deletions
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49
shapes3d.scad
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@@ -113,6 +113,7 @@ function cube(size=1, center, anchor, spin=0, orient=UP) =
// edges = Edges to mask. See [Specifying Edges](attachments.scad#section-specifying-edges). Default: all edges.
// except = Edges to explicitly NOT mask. See [Specifying Edges](attachments.scad#section-specifying-edges). Default: No edges.
// trimcorners = If true, rounds or chamfers corners where three chamfered/rounded edges meet. Default: `true`
// teardrop = If given as a number, rounding around the bottom edge of the cuboid won't exceed this many degrees from vertical. If true, the limit angle is 45 degrees. Default: `false`
// p1 = Align the cuboid's corner at `p1`, if given. Forces `anchor=FRONT+LEFT+BOTTOM`.
// p2 = If given with `p1`, defines the cornerpoints of the cuboid.
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
@@ -181,10 +182,32 @@ module cuboid(
except=[],
except_edges,
trimcorners=true,
teardrop=false,
anchor=CENTER,
spin=0,
orient=UP
) {
module xtcyl(l,r) {
if (teardrop) {
teardrop(r=r, l=l, cap_h=r, ang=teardrop, spin=90, orient=DOWN);
} else {
yrot(90) cyl(l=l, r=r);
}
}
module ytcyl(l,r) {
if (teardrop) {
teardrop(r=r, l=l, cap_h=r, ang=teardrop, spin=0, orient=DOWN);
} else {
zrot(90) yrot(90) cyl(l=l, r=r);
}
}
module tsphere(r) {
if (teardrop) {
onion(r=r, cap_h=r, ang=teardrop, orient=DOWN);
} else {
spheroid(r=r, style="octa", orient=DOWN);
}
}
module corner_shape(corner) {
e = _corner_edges(edges, corner);
cnt = sum(e);
@@ -197,33 +220,33 @@ module cuboid(
if (cnt == 0 || approx(r,0)) {
translate(c2) cube(c, center=true);
} else if (cnt == 1) {
if (e.x) right(c2.x) xcyl(l=c.x, r=r);
if (e.y) back (c2.y) ycyl(l=c.y, r=r);
if (e.x) right(c2.x) xtcyl(l=c.x, r=r);
if (e.y) back (c2.y) ytcyl(l=c.y, r=r);
if (e.z) up (c2.z) zcyl(l=c.z, r=r);
} else if (cnt == 2) {
if (!e.x) {
intersection() {
ycyl(l=c.y*2, r=r);
ytcyl(l=c.y*2, r=r);
zcyl(l=c.z*2, r=r);
}
} else if (!e.y) {
intersection() {
xcyl(l=c.x*2, r=r);
xtcyl(l=c.x*2, r=r);
zcyl(l=c.z*2, r=r);
}
} else {
intersection() {
xcyl(l=c.x*2, r=r);
ycyl(l=c.y*2, r=r);
xtcyl(l=c.x*2, r=r);
ytcyl(l=c.y*2, r=r);
}
}
} else {
if (trimcorners) {
spheroid(r=r, style="octa");
tsphere(r=r);
} else {
intersection() {
xcyl(l=c.x*2, r=r);
ycyl(l=c.y*2, r=r);
xtcyl(l=c.x*2, r=r);
ytcyl(l=c.y*2, r=r);
zcyl(l=c.z*2, r=r);
}
}
@@ -233,6 +256,7 @@ module cuboid(
size = scalar_vec3(size);
edges = _edges(edges, except=first_defined([except_edges,except]));
teardrop = is_bool(teardrop)&&teardrop? 45 : teardrop;
chamfer = approx(chamfer,0) ? undef : chamfer;
rounding = approx(rounding,0) ? undef : rounding;
assert(is_vector(size,3));
@@ -240,6 +264,7 @@ module cuboid(
assert(is_undef(chamfer) || is_finite(chamfer),"chamfer must be a finite value");
assert(is_undef(rounding) || is_finite(rounding),"rounding must be a finite value");
assert(is_undef(rounding) || is_undef(chamfer), "Cannot specify nonzero value for both chamfer and rounding");
assert(teardrop==false || (is_finite(teardrop) && teardrop>0 && teardrop<90), "teardrop must be either false or an angle number between 0 and 90")
assert(is_undef(p1) || is_vector(p1));
assert(is_undef(p2) || is_vector(p2));
assert(is_bool(trimcorners));
@@ -358,12 +383,12 @@ module cuboid(
minkowski() {
cube(isize, center=true);
if (trimcorners) {
spheroid(r=rounding, style="octa", $fn=sides);
tsphere(r=rounding, $fn=sides);
} else {
intersection() {
xtcyl(r=rounding, h=rounding*2, $fn=sides);
ytcyl(r=rounding, h=rounding*2, $fn=sides);
cyl(r=rounding, h=rounding*2, $fn=sides);
rotate([90,0,0]) cyl(r=rounding, h=rounding*2, $fn=sides);
rotate([0,90,0]) cyl(r=rounding, h=rounding*2, $fn=sides);
}
}
}