makes a rounded box in openscad with a radius

rounded_boxes.scad

module move(x=0,y=0,z=0,rx=0,ry=0,rz=0) { translate([x,y,z])rotate([rx,ry,rz]) children(); }

module rounded_cube(dimensions, rad) {
  
  
  x=dimensions[0];
  y=dimensions[1];
  z=dimensions[2];

  hull() {
    #move(ry=90,y=y/2-rad,z=z/2-rad) pill(rad=rad,h=x);
    #move(ry=90,y=-(y/2-rad),z=z/2-rad) pill(rad=rad,h=x);
    #move(ry=90,y=y/2-rad,z=-(z/2-rad)) pill(rad=rad,h=x);
    #move(ry=90,y=-(y/2-rad),z=-(z/2-rad)) pill(rad=rad,h=x);
  }
    
}

module pill(rad,h) {
  end_center_l = h - (rad*2);
  cylinder(r=rad,h= end_center_l ,center=true);
  move(z=end_center_l/2) sphere(r=rad,center=true);
  move(z=-end_center_l/2) sphere(r=rad,center=true);
}

!rounded_cube([40,80,70],3);