NX Area Measures are Different of Symmetric Shapes

Minor differences in the measurement of symmetrical surfaces and the Solution how to fixed that.

 1.  Although these 4 faces ( Example Part see below ) are extrude or revolve from the same scratch, physically that they are not the same surface. Because of the spline curve, the calculation of the area cannot be completely accurate. Using the higher accuracy options results in more accurate calculations, but it also results in a performance degradation.

2. When we change the accuracy options in preference dialog, it will only apply to the newly created features, not to the ones that have already been created in part. This behavior can avoid unexpected value changes on feature updates. When editing a face measure feature, the dialog will first loading data from feature to fulfilled/overwrite UI data including the accuracy (here feature is stored with 'Standard' accuracy). Therefore these 4 face measure features are still using 'Standard' accuracy here.

3. The work around for adjust accuracy of existing face measure is, user have to explicit open 'preference' dialog one by one to reload accuracy options while editing feature.