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August 29, 2015 14:02
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an earring in OpenSCAD
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// main radius of the earring (mm) | |
radius = 16; | |
// how much it grows with each degree | |
grow_factor = 0.001 * radius; | |
// how big is the sphere in relation to the last iterated object | |
sphere_factor = 1.5; | |
// degrees from 1 to max_t | |
max_t = 310; | |
tt = [1:max_t]; | |
// cheat the circle into a triangle | |
fn_ear = 3; | |
// generate a smooth sphere | |
fn_sphere = 100; | |
union() { | |
for (t = tt) { | |
rotate(a = [0, t, 0]) | |
render() { | |
linear_extrude(height = 1, scale = 1, $fn = fn_ear) | |
translate([radius, 0, 0]) | |
circle(r = t * grow_factor, $fn = fn_ear); | |
} | |
} | |
translate([0, 0, radius * 0.1]) | |
rotate(a = [0, max_t, 0]) | |
translate([radius, 0, 0]) | |
rotate(a = [0, -max_t + 90, 0]) | |
scale([1.0, 1.0, 0.9]) | |
render() { | |
sphere(r = max_t * grow_factor * sphere_factor, $fn = fn_sphere); | |
} | |
} |
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