在catia中,搜索命令极为强大,但是学习过程中,在搜索命令有一个Visibility检索条件一度让我费解。最初看来,这四个词应是两两互为近义和反义。
搜索命令下的Visibility检索条件参照catia官方文档的解释如下:Visible (searches for visible elements for which Shown check box is selected in the Graphic tab of the Properties dialog box. One parent of the searched element can be invisible)Hidden (searches for objects for which the Shown check box is cleared in the Graphic tab of the Properties dialog box)Shown (searches for elements in the visible space. These elements, as well as each of their ancestors, has the Visible status and is in the visible space)Invisible (searches for elements hidden in the No Show space, i.e. these elements or at least one of their ancestors have the Invisible status).而Shown check box是指在零件属性下的图形中一个选项,通常切换Hide/Show零件可以修改这个状态,而无法直接在属性下直接修改,因为该选项是灰色无法编辑状态。
Shown check box根据上述官方文档示意,进一步探究发现,hiden/shown/visible/invisible这四个选项主要围绕着本身的Hide/Shown状态和父级(同级)的Hide/Shown状态进行区别。
零件本身和其父级四种状态的区分换言之,对于1情况,本身和父级都是Shown的,则它是visible的,也是shown的,即只可通过Shown和visible检索条件检索到。对于2情况,本身是Shown的,但父级是Hide的,则它是visible,也是invisible,即只可通过viasible和invisible检索条件检索到。
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