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Improved tube(), added cube2pt()

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Revar Desmera 2019-02-24 04:35:40 -08:00
parent 32f4f1911a
commit fc2a1f5f6d
2 changed files with 26 additions and 8 deletions
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4
math.scad
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@ -380,4 +380,8 @@ function slice(arr,st,end) = let(
) [for (i=[s:e-1]) if (e>s) arr[i]];
function first_defined(v) = [for (x = v) if (x!=undef) x][0];
// vim: noexpandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap

30
shapes.scad
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@ -58,6 +58,19 @@ module offsetcube(size=[1,1,1], v=[0,0,0]) {
}
// Creates a cube between two points.
// p1 = Coordinate point of one cube corner.
// p2 = Coordinate point of opposite cube corner.
// Example:
// cube2pt([10,20,30], [40,-10,10]);
module cube2pt(p1,p2) {
translate([min(p1[0],p2[0]), min(p1[1],p2[1]), min(p1[2],p2[2])]) {
cube([abs(p2[0]-p1[0]), abs(p2[1]-p1[1]), abs(p2[2]-p1[2])], center=false);
}
}
// Makes a cube that has its right face centered at the origin.
module leftcube(size=[1,1,1]) {l=len(size)==undef? size : size[0]; left(l/2) cube(size, center=true);}
@ -613,7 +626,7 @@ module onion(h=1, r=1, d=undef, maxang=45)
// Makes a hollow tube with the given outer size and wall thickness.
// h = height of tube. (Default: 1)
// r = Outer radius of tube. (Default: 1)
// r = Outer radius of tube.
// r1 = Outer radius of bottom of tube. (Default: value of r)
// r2 = Outer radius of top of tube. (Default: value of r)
// d = Outer diameter of tube.
@ -621,8 +634,8 @@ module onion(h=1, r=1, d=undef, maxang=45)
// d2 = Outer diameter of top of tube.
// wall = horizontal thickness of tube wall. (Default 0.5)
// ir = Inner radius of tube.
// ir1 = Inner radius of bottom of tube. (Default: value of r)
// ir2 = Inner radius of top of tube. (Default: value of r)
// ir1 = Inner radius of bottom of tube.
// ir2 = Inner radius of top of tube.
// id = Inner diameter of tube.
// id1 = Inner diameter of bottom of tube.
// id2 = Inner diameter of top of tube.
@ -631,12 +644,13 @@ module onion(h=1, r=1, d=undef, maxang=45)
// tube(h=6, r=4, wall=2, $fn=6);
// tube(h=3, r1=5, r2=7, wall=2, center=true);
// tube(h=30, r1=50, r2=70, ir1=50, ir2=50, center=true);
module tube(h=1, r=1, wall=0.1, r1=undef, r2=undef, d=undef, d1=undef, d2=undef, ir=undef, id=undef, ir1=undef, ir2=undef, id1=undef, id2=undef, center=false)
// tube(h=30, wall=5, r1=40, r2=50, center=false);
module tube(h=1, wall=undef, r=undef, r1=undef, r2=undef, d=undef, d1=undef, d2=undef, ir=undef, id=undef, ir1=undef, ir2=undef, id1=undef, id2=undef, center=false)
{
r1 = (d1!=undef)? d1/2 : (d!=undef)? d/2 : (r1!=undef)? r1 : r;
r2 = (d2!=undef)? d2/2 : (d!=undef)? d/2 : (r2!=undef)? r2 : r;
ir1 = (id1!=undef)? id1/2 : (ir1!=undef)? ir1 : (id!=undef)? id/2 : (ir!=undef)?ir : r1-wall;
ir2 = (id2!=undef)? id2/2 : (ir2!=undef)? ir2 : (id!=undef)? id/2 : (ir!=undef)?ir : r2-wall;
r1 = first_defined([d1/2, d/2, id1/2+wall, id/2+wall, r1, r, ir1+wall, ir+wall]);
r2 = first_defined([d2/2, d/2, id2/2+wall, id/2+wall, r2, r, ir2+wall, ir+wall]);
ir1 = first_defined([id1/2, id/2, d1/2-wall, d/2-wall, ir1, ir, r1-wall, r-wall]);
ir2 = first_defined([id2/2, id/2, d2/2-wall, d/2-wall, ir2, ir, r2-wall, r-wall]);
if (ir1 > r1) echo("WARNING: r1 is smaller than ir1.");
if (ir2 > r2) echo("WARNING: r2 is smaller than ir2.");
up(center? 0 : h/2) {