getData( i, j, k ) {

		return this.data[ k * this.xLength * this.yLength + j * this.xLength + i ];

	}
Shortcut for data[access(i,j,k)].

@param {number} i - First coordinate.
@param {number} j - Second coordinate.
@param {number} k - Third coordinate.
@returns {number} The value in the data array.