rounded cube openscad

rcube.scad

//3D rounded cube
module rcube(width, depth, height, radius, center){
    points = [
        for (p = [
            [0 + radius, 0 + radius],
            [0 + radius, depth - radius],
            [width - radius, 0 + radius],
            [width - radius, depth - radius]
        ])
        if (center) [p[0] - width / 2, p[1] - depth / 2]
        else p
    ];
    hull(){
        for (p = points){
            translate(p) cylinder(r=radius, h=height);
        }
    }
}

rcube(350, 190, 8, 15, center=true);