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Cleaned up geometry of various shapes.

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Revar Desmera 2018-09-01 02:36:47 -07:00
parent 2d9fa565b3
commit f9a441dde8
1 changed files with 96 additions and 120 deletions
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shapes.scad
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@ -37,7 +37,7 @@ include <masks.scad>
// For when you MUST pass a child to a module, but you want it to be nothing. // For when you MUST pass a child to a module, but you want it to be nothing.
module nil() difference() {cube(0.1, center=true); cube(0.2, center=true);} module nil() union() {}
// Makes a cube that is centered in X and Y axes, and has its bottom aligned with Z=0. // Makes a cube that is centered in X and Y axes, and has its bottom aligned with Z=0.
@ -124,7 +124,8 @@ module chamfcube(
} }
// Makes a cube with rounded (filletted) vertical edges. // Makes a cube with rounded (filletted) vertical edges. The r size will be
// limited to a maximum of half the length of the shortest XY side.
// size = size of cube [X,Y,Z]. (Default: [1,1,1]) // size = size of cube [X,Y,Z]. (Default: [1,1,1])
// r = radius of edge/corner rounding. (Default: 0.25) // r = radius of edge/corner rounding. (Default: 0.25)
// center = if true, object will be centered. If false, sits on top of XY plane. // center = if true, object will be centered. If false, sits on top of XY plane.
@ -136,25 +137,19 @@ module rrect(size=[1,1,1], r=0.25, center=false)
w = size[0]; w = size[0];
l = size[1]; l = size[1];
h = size[2]; h = size[2];
rr = min(r, min(w/2-0.01, l/2-0.01));
up(center? 0 : h/2) { up(center? 0 : h/2) {
linear_extrude(height=h, convexity=2, center=true) { linear_extrude(height=h, convexity=2, center=true) {
left(w/2-r) { offset(r=rr) {
back(l/2-r) circle(r=r, center=true); square([w-2*rr, l-2*rr], center=true);
fwd(l/2-r) circle(r=r, center=true);
} }
right(w/2-r) {
back(l/2-r) circle(r=r, center=true);
fwd(l/2-r) circle(r=r, center=true);
}
square(size=[w, l-r*2], center=true);
square(size=[w-r*2, l], center=true);
} }
} }
} }
// Makes a cube with rounded (filletted) edges and corners. The r size will be
// Makes a cube with rounded (filletted) edges and corners. // limited to a maximum of half the length of the shortest side.
// size = size of cube [X,Y,Z]. (Default: [1,1,1]) // size = size of cube [X,Y,Z]. (Default: [1,1,1])
// r = radius of edge/corner rounding. (Default: 0.25) // r = radius of edge/corner rounding. (Default: 0.25)
// center = if true, object will be centered. If false, sits on top of XY plane. // center = if true, object will be centered. If false, sits on top of XY plane.
@ -163,33 +158,17 @@ module rrect(size=[1,1,1], r=0.25, center=false)
// rcube(size=[5,7,3], r=1); // rcube(size=[5,7,3], r=1);
module rcube(size=[1,1,1], r=0.25, center=false) module rcube(size=[1,1,1], r=0.25, center=false)
{ {
$fn = ($fn==undef)?max(18,floor(180/asin(1/r)/2)*2):$fn; rr = min(r, min(min(size[0]/2-0.01, size[1]/2-0.01), size[2]/2-0.01));
xoff=abs(size[0])/2-r; translate(center? [0,0,0] : size/2) {
yoff=abs(size[1])/2-r; minkowski() {
zoff=abs(size[2])/2-r; cube([size[0]-2*rr, size[1]-2*rr, size[2]-2*rr], center=true);
offset = center?[0,0,0]:size/2; sphere(rr, $fn=quantup(segs(rr), 4));
translate(offset) {
union() {
grid_of([-xoff,xoff],[-yoff,yoff],[-zoff,zoff])
sphere(r=r,center=true,$fn=$fn);
grid_of(xa=[-xoff,xoff],ya=[-yoff,yoff])
cylinder(r=r,h=zoff*2,center=true,$fn=$fn);
grid_of(xa=[-xoff,xoff],za=[-zoff,zoff])
rotate([90,0,0])
cylinder(r=r,h=yoff*2,center=true,$fn=$fn);
grid_of(ya=[-yoff,yoff],za=[-zoff,zoff])
rotate([90,0,0])
rotate([0,90,0])
cylinder(r=r,h=xoff*2,center=true,$fn=$fn);
cube(size=[xoff*2,yoff*2,size[2]], center=true);
cube(size=[xoff*2,size[1],zoff*2], center=true);
cube(size=[size[0],yoff*2,zoff*2], center=true);
} }
} }
} }
// Creates a cylinder with chamferred edges. // Creates a cylinder with chamferred (bevelled) edges.
// h = height of cylinder. (Default: 1.0) // h = height of cylinder. (Default: 1.0)
// r = radius of cylinder. (Default: 1.0) // r = radius of cylinder. (Default: 1.0)
// d = diameter of cylinder. (use instead of r) // d = diameter of cylinder. (use instead of r)
@ -241,16 +220,21 @@ module chamf_cyl(h=1, r=1, d=undef, chamfer=0.25, chamfedge=undef, angle=45, cen
module rcylinder(h=1, r=1, d=undef, fillet=0.25, center=false) module rcylinder(h=1, r=1, d=undef, fillet=0.25, center=false)
{ {
d = (d == undef)? r * 2.0 : d; d = (d == undef)? r * 2.0 : d;
dh = d - 2*fillet;
hh = h - 2*fillet;
up(center? 0 : h/2) { up(center? 0 : h/2) {
rotate_extrude(angle=360, convexity=2) { rotate_extrude(angle=360, convexity=2) {
hull() {
left(d/2-fillet) { left(d/2-fillet) {
back(h/2-fillet) circle(r=fillet, center=true); yspread(h-2*fillet) {
fwd(h/2-fillet) circle(r=fillet, center=true); circle(r=fillet, $fn=quantup(segs(fillet), 4));
}
} }
left(d/2/2) square(size=[d/2, h-fillet*2], center=true); left(d/2/2) square(size=[d/2, h-fillet*2], center=true);
left((d/2-fillet)/2) square(size=[d/2-fillet, h], center=true); left((d/2-fillet)/2) square(size=[d/2-fillet, h], center=true);
} }
} }
}
} }
module filleted_cylinder(h=1, r=1, d=undef, fillet=0.25, center=false) module filleted_cylinder(h=1, r=1, d=undef, fillet=0.25, center=false)
@ -373,28 +357,50 @@ module trapezoid(size1=[1,1], size2=[1,1], h=1, center=false)
} }
// Makes a 2D teardrop shape. Useful for 3D printable holes.
// r = radius of circular part of teardrop. (Default: 1)
// d = diameter of spherical portion of bottom. (Use instead of r)
// ang = angle of hat walls from the Y axis. (Default: 45 degrees)
// cap_h = if given, height above center where the shape will be truncated.
// Example:
// teardrop2d(r=30, ang=30);
module teardrop2d(r=1, d=undef, ang=45, cap_h=undef)
{
r = (d!=undef)? (d/2.0) : r;
difference() {
hull() {
back(r*sin(ang)) {
yscale(1/tan(ang)) {
difference() {
zrot(45) square([2*r*cos(ang)/sqrt(2), 2*r*cos(ang)/sqrt(2)], center=true);
fwd(r/2) square([2*r, r], center=true);
}
}
}
zrot(90) circle(r=r, center=true);
}
if (cap_h != undef) {
back(r*3/2+cap_h) square([r*3, r*3], center=true);
}
}
}
// Makes a teardrop shape in the XZ plane. Useful for 3D printable holes. // Makes a teardrop shape in the XZ plane. Useful for 3D printable holes.
// r = radius of circular part of teardrop. (Default: 1) // r = radius of circular part of teardrop. (Default: 1)
// d = diameter of spherical portion of bottom. (Use instead of r)
// h = thickness of teardrop. (Default: 1) // h = thickness of teardrop. (Default: 1)
// ang = angle of hat walls from the Z axis. (Default: 45 degrees)
// cap_h = if given, height above center where the shape will be truncated.
// Example: // Example:
// teardrop(r=3, h=2, ang=30); // teardrop(r=30, h=10, ang=30);
module teardrop(r=1, h=1, ang=45, $fn=undef) module teardrop(r=1, d=undef, h=1, ang=45, cap_h=undef)
{ {
$fn = ($fn==undef)?max(12,floor(180/asin(1/r)/2)*2):$fn; r = (d!=undef)? (d/2.0) : r;
xrot(90) union() { xrot(90) {
translate([0, r*sin(ang), 0]) { linear_extrude(height=h, center=true, steps=2) {
scale([1, 1/tan(ang), 1]) { teardrop2d(r=r, ang=ang, cap_h=cap_h);
difference() {
zrot(45) {
cube(size=[2*r*cos(ang)/sqrt(2), 2*r*cos(ang)/sqrt(2), h], center=true);
} }
translate([0, -r/2, 0]) {
cube(size=[2*r, r, h+1], center=true);
}
}
}
}
cylinder(h=h, r=r, center=true);
} }
} }
@ -408,25 +414,11 @@ module teardrop(r=1, h=1, ang=45, $fn=undef)
// onion(h=15, r=10, maxang=30); // onion(h=15, r=10, maxang=30);
module onion(h=1, r=1, d=undef, maxang=45) module onion(h=1, r=1, d=undef, maxang=45)
{ {
rr = (d!=undef)? (d/2.0) : r; r = (d!=undef)? (d/2.0) : r;
xx = rr*cos(maxang); rotate_extrude(angle=360, convexity=2) {
yy = rr*sin(maxang);
tipy = xx*sin(90-maxang)/sin(maxang) + yy;
rotate_extrude(angle=360, convexity=4) {
difference() { difference() {
union() { teardrop2d(r=r, ang=maxang, cap_h=h);
circle(r=rr, center=true); right(r+h/2) square(size=r*2+h, center=true);
polygon(
points=[
[0, 0],
[0, tipy],
[xx, yy],
[rr, 0]
]
);
}
back(tipy/2+h) square(size=[rr*2, tipy], center=true);
left(rr) square(size=rr*2, center=true);
} }
} }
} }
@ -442,13 +434,15 @@ module onion(h=1, r=1, d=undef, maxang=45)
// tube(h=3, r=4, wall=1, center=true); // tube(h=3, r=4, wall=1, center=true);
// tube(h=6, r=4, wall=2, $fn=6); // tube(h=6, r=4, wall=2, $fn=6);
// tube(h=3, r1=5, r2=7, wall=2, center=true); // tube(h=3, r1=5, r2=7, wall=2, center=true);
module tube(h=1, r=1, r1=undef, r2=undef, wall=0.5, center=false) module tube(h=1, r=1, r1=undef, r2=undef, d=undef, d1=undef, d2=undef, wall=0.1, center=false)
{ {
r1 = (r1==undef)? r : r1; r1 = (d1!=undef)? d1/2 : (d!=undef)? d/2 : (r1!=undef)? r1 : r;
r2 = (r2==undef)? r : r2; r2 = (d2!=undef)? d2/2 : (d!=undef)? d/2 : (r2!=undef)? r2 : r;
up(center? 0 : h/2) {
difference() { difference() {
cylinder(h=h, r1=r1, r2=r2, center=center); cylinder(h=h, r1=r1, r2=r2, center=true);
down(0.25) cylinder(h=h+1, r1=r1-wall, r2=r2-wall, center=center); cylinder(h=h+0.05, r1=r1-wall, r2=r2-wall, center=true);
}
} }
} }
@ -484,20 +478,10 @@ module slot(
r = (r != undef)? r : (d/2); r = (r != undef)? r : (d/2);
r1 = (r1 != undef)? r1 : ((d1 != undef)? (d1/2) : r); r1 = (r1 != undef)? r1 : ((d1 != undef)? (d1/2) : r);
r2 = (r2 != undef)? r2 : ((d2 != undef)? (d2/2) : r); r2 = (r2 != undef)? r2 : ((d2 != undef)? (d2/2) : r);
delta = p2 - p1;
theta = atan2(delta[1], delta[0]);
xydist = sqrt(pow(delta[0],2) + pow(delta[1],2));
phi = atan2(delta[2], xydist);
dist = sqrt(pow(delta[2],2) + xydist*xydist);
$fn = quantup(segs(max(r1,r2)),4); $fn = quantup(segs(max(r1,r2)),4);
translate(p1) { hull() {
zrot(theta) { translate(p1) cylinder(h=h, r1=r1, r2=r2, center=true);
yrot(phi) { translate(p2) cylinder(h=h, r1=r1, r2=r2, center=true);
cylinder(h=h, r1=r1, r2=r2, center=true);
right(dist/2) trapezoid([dist, r1*2], [dist, r2*2], h=h, center=true);
right(dist) cylinder(h=h, r1=r1, r2=r2, center=true);
}
}
} }
} }
@ -733,7 +717,7 @@ module braced_thinning_wall(h=50, l=100, thick=5, ang=30, strut=5, wall=2)
// ang = maximum overhang angle of diagonal brace. // ang = maximum overhang angle of diagonal brace.
// strut = the width of the diagonal brace. // strut = the width of the diagonal brace.
// wall = the thickness of the thinned portion of the wall. // wall = the thickness of the thinned portion of the wall.
// diagonly = boolean, which denotes only the diagonal brace should be thick. // diagonly = boolean, which denotes only the diagonal side (hypotenuse) should be thick.
// Example: // Example:
// thinning_triangle(h=50, l=100, thick=4, ang=30, strut=5, wall=2, diagonly=true); // thinning_triangle(h=50, l=100, thick=4, ang=30, strut=5, wall=2, diagonly=true);
module thinning_triangle(h=50, l=100, thick=5, ang=30, strut=5, wall=3, diagonly=false) module thinning_triangle(h=50, l=100, thick=5, ang=30, strut=5, wall=3, diagonly=false)
@ -782,7 +766,8 @@ module thinning_brace(h=50, l=100, thick=5, ang=30, strut=5, wall=3)
} }
// Makes an open rectangular strut with X-shaped cross-bracing, designed with 3D printing in mind. // Makes an open rectangular strut with X-shaped cross-bracing, designed to reduce the
// need for support material in 3D printing.
// h = Z size of strut. // h = Z size of strut.
// w = X size of strut. // w = X size of strut.
// l = Y size of strut. // l = Y size of strut.
@ -838,7 +823,8 @@ module sparse_strut3d(h=50, l=100, w=50, thick=3, maxang=40, strut=3, max_bridge
//!sparse_strut3d(h=40, w=40, l=120, thick=3, strut=3); //!sparse_strut3d(h=40, w=40, l=120, thick=3, strut=3);
// Makes an open rectangular strut with X-shaped cross-bracing, designed with 3D printing in mind. // Makes an open rectangular strut with X-shaped cross-bracing, designed to reduce
// the need for support material in 3D printing.
// h = height of strut wall. // h = height of strut wall.
// l = length of strut wall. // l = length of strut wall.
// thick = thickness of strut wall. // thick = thickness of strut wall.
@ -889,36 +875,26 @@ module sparse_strut(h=50, l=100, thick=4, maxang=30, strut=5, max_bridge = 20)
// strut = the width of the cross-braces. // strut = the width of the cross-braces.
// wall = thickness of corrugations. // wall = thickness of corrugations.
// Example: // Example:
// corrugated_wall(h=50, l=100, thick=4, strut=5, wall=2); corrugated_wall(h=50, l=100, thick=4, strut=5, wall=2, $fn=12);
module corrugated_wall(h=50, l=100, thick=5, strut=5, wall=2) module corrugated_wall(h=50, l=100, thick=5, strut=5, wall=2)
{ {
innerlen = l - strut*2; amplitude = (thick - wall) / 2;
inner_height = h - wall*2; period = min(15, thick * 2);
spacing = thick*sqrt(3); steps = quantup(segs(thick/2),4);
corr_count = floor(innerlen/spacing/2)*2; step = period/steps;
il = l - 2*strut + 2*step;
yspread(l-strut) { linear_extrude(height=h-2*strut+0.1, steps=2, convexity=ceil(2*il/period), center=true) {
cube(size=[thick, strut, h], center=true); polygon(
} points=concat(
zspread(h-wall) { [for (y=[-il/2:step:il/2]) [amplitude*sin(y/period*360)-wall/2, y] ],
cube(size=[thick, l, wall], center=true); [for (y=[il/2:-step:-il/2]) [amplitude*sin(y/period*360)+wall/2, y] ]
)
);
} }
difference() { difference() {
for (ypos = [-innerlen/2:spacing:innerlen/2]) { cube([thick, l, h], center=true);
translate([0, ypos, 0]) { cube([thick+0.5, l-2*strut, h-2*strut], center=true);
translate([0, spacing/4, 0])
zrot(-45) cube(size=[wall, thick*sqrt(2), inner_height], center=true);
translate([0, spacing*3/4, 0])
zrot(45) cube(size=[wall, thick*sqrt(2), inner_height], center=true);
}
}
xspread(2*thick) {
cube(size=[thick, l, h], center=true);
}
yspread(2*l) {
cube(size=[thick*2, l, h], center=true);
}
} }
} }