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+ module bubbles(size,d=1.2,s=1.8) {
+ maxr=max(d/2,size[1]);
+ scl = [ d/2/maxr, size[1]/maxr, d/2/maxr ];
+ nx = floor((size[0]-2*d)/s); sx = s*nx; x0=(size[0]-sx)/2;
+ nz = floor((size[2]-2*d)/s); sz = s*nz; z0=(size[2]-sz)/2;
+ for(iz=[0:nz]) let(z=z0+s*iz) {
+ for(ix=[0:iz%2?nx-1:nx]) let(x=x0+(iz%2?s/2:0)+s*ix) {
+ translate([x,0,z]) scale(scl) sphere(r=maxr,$fn=30);
+ }
+ }
+ }