Intersecting octahedra

thingiverse

Playing with OpenSCAD and Dissolvable Filament. March 5, 2015: A Fourth Octahedron Added. Adjustments Made to Angles. Re-rendered at Higher Resolution. module pipe(th,len) { cylinder(r=th, h=len, center=true, $fs=0.2); }; module octahedron(len, th) { x = len * 0.32; union() { translate([0,x,x]) rotate(45, [1,0,0]) pipe(th,len); translate([0,-x,-x]) rotate(-45, [1,0,0]) pipe(th,len); translate([-x,0,-x]) rotate(-45, [1,0,0]) pipe(th,len); translate([0,x,x]) rotate(45, [0,1,0]) pipe(th,len); translate([x,0,x]) rotate(-45, [0,1,0]) pipe(th,len); translate([-x,0,-x]) rotate(45, [0,1,0]) pipe(th,len); translate([x*2,0,0]) sphere(r=th*2,$fs=0.2); translate([-x*2,0,0]) sphere(r=th*2,$fs=0.2); }; }; step = 6; turn = 19; octahedron(20,1); rotate(turn,[1,0,0]) translate([step,0,0]) rotate(-45,[1,0,0]) octahedron(20,1); translate([-step,0,0]) rotate(45,[1,0,0]) octahedron(20,1); translate([step*2,0,0]) rotate(turn*[1,0,0]) octahedron(20,1);