To many industrial products such as cell phone,family appliance,vehicle,a pretty shape of nice visual effect is indispensable. To fulfill this target,designers are endeavoring to make the curve and surface of the products smooth and continuous during the shape design. Through the analysis and generalization of the present smoothing methods,the energy optimization method which combines the merits of energy method and least squares method together is studied,the target function of energy optimization method is derived,the solution to the target function and steps of curve fairing is introduced,the skills and methods building A-class surface which are based on cloud data measured from 3D scanning are studied,the validity of energy optimization method is verified with the example of the shape design of a mini-EV as well.
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