makeShear( xy, xz, yx, yz, zx, zy ) {

		this.set(

			1, yx, zx, 0,
			xy, 1, zy, 0,
			xz, yz, 1, 0,
			0, 0, 0, 1

		);

		return this;

	}
Sets this matrix as a shear transformation.

@param {number} xy - The amount to shear X by Y.
@param {number} xz - The amount to shear X by Z.
@param {number} yx - The amount to shear Y by X.
@param {number} yz - The amount to shear Y by Z.
@param {number} zx - The amount to shear Z by X.
@param {number} zy - The amount to shear Z by Y.
@return {Matrix4} A reference to this matrix.