getInterpolation() {

		switch ( this.createInterpolant ) {

			case this.InterpolantFactoryMethodDiscrete:

				return InterpolateDiscrete;

			case this.InterpolantFactoryMethodLinear:

				return InterpolateLinear;

			case this.InterpolantFactoryMethodSmooth:

				return InterpolateSmooth;

		}

	}
Returns the current interpolation type.

@return {(InterpolateLinear|InterpolateDiscrete|InterpolateSmooth)} The interpolation type.