function ParametricBufferGeometry(code, slices, stacks)
{
	var generator = this.compile(code);

	TParametricBufferGeometry.call(this, generator, slices, stacks);

	this.type = "ParametricBufferGeometry";

	this.parameters = {
		code: code,
		slices: slices,
		stacks: stacks
	};
}
Parametric bufffer geometry are constructed from javascript code describing a parametric surface.

A parametric function receives a (u, v) coordinate value and returns a Vector3 with the surface point for those values.

(u, v) values are normalized and might need readjusting to match the parametric function generator domain.

@class ParametricBufferGeometry
@constructor
@param {string} code Javascript code that receive (u: number, v: number, target?: Vector3) as parameters, the target paramter might be undefined.
@param {number} slices The count of slices to use for the parametric function.
@param {number} stacks The count of stacks to use for the parametric function.