Sphere Spring (Spherical Spiral)

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Made in OpenScad using sin and cos: ------- $fn=7; pi = 3.14; k = 57.2;//1 radian iterations = 400; turns = 10; c = turns*2; r = 1.0;//radius 1 (unit sphere) ti = 0; tf = pi*k; td = tf/iterations;//step for (t=[ti:td:tf-td]) { //echo(floor(t/td)); t1 = t; t2 = t+td; x1 = r * sin(t1) * cos(c*t1); y1 = r * sin(t1) * sin(c*t1); z1 = r * cos(t1); x2 = r * sin(t2) * cos(c*t2); y2 = r * sin(t2) * sin(c*t2); z2 = r * cos(t2); hull() { translate([x1,y1,z1]) { sphere(r=0.05, $fa = .1, $fs = .1); } translate([x2,y2,z2]) { sphere(r=0.05, $fa = .1, $fs = .1); } } }