module aligned_cube(size, aligned=[1,1,0])
{
    translate(-0.5*[size[0]*aligned[0], size[1]*aligned[1], size[2]*aligned[2]])
        cube(size);
}
module aligned_rounded_cube(size, r=5, rounding=[1,1,1], aligned=[1,1,0])
{

    translate(-0.5*[ ( size[0]*aligned[0] -2*r),
                     ( size[1]*aligned[1] -2*r),
                     ( size[2]*aligned[2] -2*r)])
    {
        eps=0.001;
        if( rounding == [1,1,1] ) {
            minkowski() {
                cube([size[0] - 2*r, size[1] - 2*r, size[2]- 2*r]);
                sphere(r);
            }
        }else if( rounding == [1,1,0] ) {
            //cylinder rounding x/y
            minkowski() {
                translate([ 0,0,-r])
                    cube([size[0] - 2*r, size[1] - 2*r, size[2]-2*eps]);
                cylinder(r=r,h=eps);
            }
        }else if( rounding == [1,0,1] ) {
            //cylinder rounding x/z
            minkowski() {
                translate([ 0,-r,0])
                    cube([size[0] - 2*r, size[1] - 2*eps, size[2]- 2*r]);
                rotate([90,0]) {
                    cylinder(r=r,h=eps);
                }
            }
        }else if( rounding == [0,1,1] ) {
            //cylinder rounding x/z
            minkowski() {
                translate([ 0,-r,0])
                    cube([size[0] - 2*r, size[1] - 2*eps, size[2]- 2*r]);
                rotate([90,0]) {
                    cylinder(r=r,h=eps);
                }
            }
        }
    }
}


module rounded_cube(size, r, rounding=[0,0,0])
{
    aligned_rounded_cube(size, r, rounding=[0,0,0], aligned=[0,0,0]);
}

module axis(l=30, w=0.3) {
    color("red")
        cube([l,w,w]);
    color("blue")
        cube([w,w,l]);
    color("green")
        cube([w,l,w]);
    color("black")
        cube([w,w,w]);
}

// test show
translate([-45,45,0]) {
    translate([0,-90,0]) {
        axis();

        %cube(size=[10,10,10]);
        translate([0,-10,0])
        text(halign="center",valign="center", $fn=$fn, size=3,font="Linux Libertine O", "cube()");
    }

    translate([0,10,0]) {
        axis();

        %aligned_cube(size=[10,10,10], aligned=[1,1,1]);
        translate([0,-10,0])
        text(halign="center",valign="center", $fn=$fn, size=3,font="Linux Libertine O", "aligned_cube([1,1,1])");
    }

    translate([0,-30,0]) {
        axis();

        %aligned_rounded_cube(size=[10,10,10],r=1, aligned=[1,1,0]);
        translate([0,-10,0])
        text(halign="center",valign="center", $fn=$fn, size=3,font="Linux Libertine O", "aligned_rounded_cube([1,1,0])");
    }

    translate([50,10,0]) {
        $fn=32;
        axis();

        %aligned_rounded_cube(size=[10,10,10],r=1, aligned=[1,1,0]);
        translate([0,-10,0])
        text(halign="center",valign="center", $fn=$fn, size=3,font="Linux Libertine O", "aligned_rounded_cube(r=1)");
    }

    translate([50,-30,0]) {
        $fn=32;
        axis();

        %aligned_rounded_cube(size=[10,10,10],r=2, aligned=[1,1,0]);
        translate([0,-10,0])
        text(halign="center",valign="center", $fn=$fn, size=3,font="Linux Libertine O", "aligned_rounded_cube(r=2)");
    }

    translate([100,10,0]) {
        $fn=32;
        axis();

        %aligned_rounded_cube(size=[10,10,10],r=2, rounding=[1,1,1]);
        translate([0,-10,0])
        text(halign="center",valign="center", $fn=$fn, size=3,font="Linux Libertine O", "aligned_rounded_cube([1,1,1])");
    }
    translate([100,-30,0]) {
        $fn=32;
        axis();

        %aligned_rounded_cube(size=[10,10,10],r=2, rounding=[1,1,0]);
        translate([0,-10,0])
        text(halign="center",valign="center", $fn=$fn, size=3,font="Linux Libertine O", "aligned_rounded_cube([1,1,0])");
    }
    translate([100,-60,0]) {
        $fn=32;
        axis();

        %aligned_rounded_cube(size=[10,10,10],r=2, rounding=[1,0,1]);
        translate([0,-10,0])
        text(halign="center",valign="center", $fn=$fn, size=3,font="Linux Libertine O", "aligned_rounded_cube([1,0,1])");
    }
    translate([100,-90,0]) {
        $fn=32;
        axis();

        %aligned_rounded_cube(size=[10,10,10],r=2, rounding=[0,1,1]);
        translate([0,-10,0])
        text(halign="center",valign="center", $fn=$fn, size=3,font="Linux Libertine O", "aligned_rounded_cube([0,1,1])");
    }
}