I created a 2d surface that I can perform a linear extrusion on, however the result it obviously a hard edge on the extrusion. I would love to be able to add a bezel - either rounded or at 45 degrees. Is there an easy way?

  • azdle
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    41 year ago

    There’s lots of ways to round things or chamfer things. Coming from an extruded shape, a basic chamfer is pretty easy, you can do two different extrusions, one a bit shorter than your final piece and one full height, but offset inward a bit, and then hull them together:

    module shape() {
        square(10, center = true);
    }
    
    
    hull() {
        linear_extrude(8)
        shape();
    
        linear_extrude(10)
        offset(delta = -2)
        shape();
    }
    

    Though, because of the hull, this will only really work with fully convex shapes. Doing this for shapes with concave features is harder.

    • azdle
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      41 year ago

      For rounding, you can do the extrusion, but with it a bit smaller in every dimension, then minkowski with a sphere (or a different shape if you don’t want all the edges rounded), but it’s tricky to get right:

      module shape() {
          square(80, center = true);
      }
      
      
      minkowski() {
          linear_extrude(80)
          shape();
      
          sphere(r = 20);
      }
      

    • AndyOP
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      11 year ago

      Thank you. Yeah, the shape is a mix of convex and concave. I might need to just make do for this prototype.

  • @wolfwood
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    21 year ago

    you can also tip over a cube() by 45° and difference it from your object to take off an edge.