openjscad-aurora-webapp

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// title: Hull() 
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// author: Rene K. Mueller
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// license: MIT License
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// date: 2013/04/18
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function showHull() {
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   var o = Array.prototype.slice.call(arguments);
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   return union(     // -- we have to extrude all, in order to union (we can't mix CAG and CSG)
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      linear_extrude({height: 0.1},union(o)).translate([20,0,0]),    // flat single
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      linear_extrude({height: 0.1},hull(o)).translate([-10,0,0]),    // flat convex hulled
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      linear_extrude({height: 10},     // convex hulled extruded
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         hull(o)).translate([-40,0,0])
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   );
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}
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function main() {
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   return [
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      showHull(
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         circle({r: 8, center: true}).translate([0,20,0]), 
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         circle({r: 8, center: true})
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      ).translate([-20,-20,0]),
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      showHull(
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         circle({r: 8, center: true}).translate([-15,10,0]),
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         square({size: [10,10], center: true})
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      ).translate([-20,30,0])
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   ];
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}
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