function plane( u, v, target ) {

	target.set( u, 0, v );

}
A parametric function representing a flat plane.

@param {number} u - The `u` coordinate on the surface in the range `[0,1]`.
@param {number} v - The `v` coordinate on the surface in the range `[0,1]`.
@param {Vector3} target - The target vector that is used to store the method's result.