ImageUtility.float4.this C# (CSharp) Method

        public float this[int _coeff]
        {
            get
            {
                switch ( _coeff )
                {
                    case 0: return x;
                    case 1: return y;
                    case 2: return z;
                    case 3: return w;
                }
                return float.NaN;
            }
            set
            {
                switch ( _coeff )
                {
                    case 0: x = value; break;
                    case 1: y = value; break;
                    case 2: z = value; break;
                    case 3: w = value; break;
                }
            }
        }