red_cut.java

 /**
     * cuts the Cube into two cubes by red value.
     * @return List containing the new Cubes (left and right | up and down | front and back).
     */
    public ArrayList<Cube3D> r_cut() {
        Comparator<MyPoint> sort = new Comparator<MyPoint>() {
            @Override
            public int compare(MyPoint o1, MyPoint o2) {
                return o1.cords[0] - o2.cords[0];
            }
        };
        System.out.println(points);
        Collections.sort(points,sort);
        System.out.println(points);
        int value = 0;
        int boarder = getValue()/2;
        ArrayList<MyPoint> left, right;
        left = new ArrayList<>();
        right = new ArrayList<>();
        
        for(MyPoint p : points) {
            value += p.value;
            if(value >= boarder)
                right.add(p);
            else
                left.add(p);
        }
        ArrayList<Cube3D> newCubes = new ArrayList<>();
        newCubes.add(new Cube3D(left,
                left.get(0).cords[0],
                green_min, blue_min, 
                left.get(left.size()-1).cords[0],
                green_max, 
                blue_max)
        );
        newCubes.add(new Cube3D(right,
                right.get(0).cords[0],
                green_min, blue_min,
                right.get(right.size()-1).cords[0],
                green_max,
                blue_max));
        return newCubes;
    }