set( n11, n12, n13, n21, n22, n23, n31, n32, n33 ) {

		const te = this.elements;

		te[ 0 ] = n11; te[ 1 ] = n21; te[ 2 ] = n31;
		te[ 3 ] = n12; te[ 4 ] = n22; te[ 5 ] = n32;
		te[ 6 ] = n13; te[ 7 ] = n23; te[ 8 ] = n33;

		return this;

	}
Sets the elements of the matrix.The arguments are supposed to be
in row-major order.

@param {number} [n11] - 1-1 matrix element.
@param {number} [n12] - 1-2 matrix element.
@param {number} [n13] - 1-3 matrix element.
@param {number} [n21] - 2-1 matrix element.
@param {number} [n22] - 2-2 matrix element.
@param {number} [n23] - 2-3 matrix element.
@param {number} [n31] - 3-1 matrix element.
@param {number} [n32] - 3-2 matrix element.
@param {number} [n33] - 3-3 matrix element.
@return {Matrix3} A reference to this matrix.