Plane.GetValue

Returns the output value from the noise module given the ( @a x, @a z ) coordinates of the specified input value located on the surface of the plane.

@param x The @a x coordinate of the input value. @param z The @a z coordinate of the input value.

@returns The output value from the noise module.

@pre A noise module was passed to the SetMod() method.

This output value is generated by the noise module passed to the SetMod() method.