title: Smooth the sharp corners between objects in openscad
body: <p>I am wondering how to avoid a sharp corner between two objects in openscad.</p>
  
  <p>MWE:
  I have the following code which gives the sharp corners between the cylinder and sphere objects.</p>
  
  <pre><code>sphere (r=0.3, $fn=50);
  
  rotate([90,0,0])
  {
   cylinder (h=2, r=0.1, center=true, $fn=20);
  }
  
  rotate([0,90,0])
  {
   cylinder (h=2, r=0.1, center=true, $fn=20);
  }
  </code></pre>
  
  <p>What am I actually looking for?</p>
  
  <p>Its an '3D-arc in 360 degrees' connecting the cylinder and the sphere. Something like an expanding column. </p>
  
  <p>I tried several other combinations using minkowski() function (code below) but the cylinder end in connection with the sphere never get smoothed.</p>
  
  <pre><code>module draw(){
  sphere (r=0.3, $fn=50);
  
  rotate([90,0,0])
  {
   cylinder (h=2, r=0.1, center=true, $fn=20);
  }
  
  rotate([0,90,0])
  {
   cylinder (h=2, r=0.1, center=true, $fn=20);
  }
  
  }
  
   minkowski(){
   draw();
   sphere(0.01);
   }
  </code></pre>
  
  <p>Can anyone give me a hint here please.</p>