本帖最后由 ValleyViews 于 2015-10-8 02:24 编辑
( q7 z+ D3 x/ waysuio 发表于 2015-10-7 04:58 
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0 n8 b. I8 Z) _6 P7 `9 R大侠,别用您啦,小子真担待不起,我是小弟:D
( K' S4 V0 t% Q! p大侠这么认真,小子自然很愿意来跟大侠说一下。 8 i4 y: X4 c! y$ {* Z
四海之内皆兄弟也。
! h5 y( ~ v! h# nTalking about your explanation, I think that every sentence is understandable except this one: “Line elements is a 2D element, like it just has dimensions in X and Y, and NEVER think about you can measure line elements in Z axis.” My understanding is that even though you measure line elements in specified view direction ( either front view or side view ), it doesn't mean the measured line element is a 2D element. Furthermore, actually it is still a 3D element. When you measure it with an indicator, what will you get? You must get some values in Z axis.
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