shelf_adapter.as

// AngelCAD code.

shape@ main_shape(as_args@ args)
{
   double l    = 20.5; // mm
   double w    = 10.5; // mm
   double diam = 16.0; // mm
   double tol  = 0.75; // mm
   
   solid@ pipe = rotate_y(deg:-90)
               *translate(diam*1.5,0,10)
               *cylinder(r:diam/2+tol,h:100);
               
   solid@ leg  = translate(-3,0,0)
               * rotate_z(deg:-90)
               * translate(0,0,diam)
               * linear_extrude(rectangle(l+tol,w+tol,center:true),height:100);
               
   solid@ cutoff = translate(-1.0*diam,0,2.4*diam)
                 * rotate_x(deg:90)
                 *cylinder(r:18,h:100,center:true);
   
   solid@ box = translate(0,0,diam)
                *cuboid(dx:2*diam,dy:1.5*diam,dz:2*diam,center:true);
   
   return  box - cutoff - translate(0.7*diam,0,-0.85*diam)*(pipe+leg);
}

void main()
{
   shape@ obj = main_shape(GetArgs());
   obj.write_xcsg(GetInputFullPath(),secant_tolerance:0.001);
}

shelf_adapter.stl