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asymmetry = 0.6; // [-5:0.1:5] // Asymmetry values range from -20 to 20, // with useful variation of smooth shapes for asym from -5 to 5. module Egg(width, height, asym=1.5) { $fa=1; $fs=0.2; asym = asym > 20 ? 20 : asym < -20 ? -20 : asym; asym_fact = 1+exp(asym); nas_adj = asym > -3 ? 1 : 1/(-2-asym)^0.3; xscale = 0.5/sqrt(0.5-0.5^asym_fact)^nas_adj; resize([width, width, height]) rotate_extrude() polygon( [for (a=[-90:90]) let( y = (sin(a)+1)/2, x = sqrt(y-y^asym_fact)^nas_adj ) 10*[x*xscale, asym>0 ? 1-y : y]] ); } Egg(6, 10, asymmetry);
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