greygoo-openscad-libraries/cube_round_xy.scad

// Module for painting cube with rounded corners in xy directions

module cube_round_xy(dim,mki){
    if(mki<=0){
        cube(dim);
    }
    else {
        translate([mki/2,mki/2,0]){
            linear_extrude(dim[2]){
                minkowski(){
                    square([dim[0]-mki,dim[1]-mki]);
                    circle(d=mki);
                }
            }
        }
    }
}