module roundedBox(
    length = 60,
    width = 35,
    height = 50,
    corner_rd = 10,
    corner_ld = 10,
    corner_ru = 10,
    corner_lu = 10
) {

    linear_extrude(height) {

        corneroff_d_big = (corner_ld >= corner_rd) ? corner_ld : corner_rd;
        corneroff_d_small = (corner_ld >= corner_rd) ? corner_rd : corner_ld;

        corneroff_l_big = (corner_lu >= corner_ld) ? corner_lu : corner_ld;
        corneroff_l_small = (corner_lu >= corner_ld) ? corner_ld : corner_lu;

        corneroff_u_big = (corner_lu >= corner_ru) ? corner_lu : corner_ru;
        corneroff_u_small = (corner_lu >= corner_ru) ? corner_ru : corner_lu;

        corneroff_r_big = (corner_ru >= corner_rd) ? corner_ru : corner_rd;
        corneroff_r_small = (corner_ru >= corner_rd) ? corner_rd : corner_ru;
        // corner lu
        translate([corner_lu, width - corner_lu, 0])
            circle(corner_lu);
        // corner ru
        translate([length - corner_ru, width - corner_ru, 0])
            circle(corner_ru);
        // corner ld
        translate([corner_ld, corner_ld, 0])
            circle(corner_ld);
        // corner rd
        translate([length - corner_rd, corner_rd, 0])
            circle(corner_rd);
        // main square
        translate([0, corneroff_d_big, 0])
            square([
                length - corneroff_r_big,
                width - corneroff_d_big - corneroff_u_big
            ]);
        // right support square
        translate([length - corneroff_r_big, corner_rd, 0])
            square([
                corneroff_r_big,
                width - corner_ru - corner_rd
            ]);
        // lower support square
        translate([corner_ld, 0, 0])
            square([
                length - corner_rd - corner_ld,
                corneroff_d_big
            ]);
        // upper support square
        translate([corner_lu, width - corneroff_u_big, 0])
            square([
                length - corner_ru - corner_lu,
                corneroff_u_big
            ]);
        // left support square
        translate([0, corner_ld, 0])
            square([
                corneroff_l_big,
                width - corner_lu - corner_ld
            ]);
    }
}