
Persistent Surfaces
In many cases, the same surfaces are used for cells in a portion of a model, such as the floor and ceiling when defining the walls of a room. Persistent surfaces remain picked once a cell is created. The select them, press the Pick Persistent Cell Surfaces toolbar buttonor select the item in the Cell menu.
The button remains depressed while the Pick Persistent mode is in effect. To remove them, press the Clear Persistent Surfaces buttonor use the menu item. Moving to another cut does not clear the Pick Persistent mode, making it possible to inadvertently pick an undesired persistent surface. The mode should be turned off by clicking on the depressed button (or selecting another mode, such as Pick Surfaces).
When the Use Orthogonal Persistent Surfaces item in the Cell menu is checked, the program will automatically include persistent surfaces defined in another cut when clicking for sense. For example, if the floor and ceiling planes are selected as persistent surfaces in a cut showing the elevation and a click for sense is make in a cut showing the floor plan, the floor and ceiling planes are included in the cell definition without the need to click for sense in the elevation cut. The depth of the floor plan cut is used to determine the sense of the floor and ceiling planes.
The depth of the cut in which cell definition will take place should be between the orthogonal persistent surfaces. In the example above, the depth of the cut that shows the floor plan should be between the floor and ceiling levels. If the persistent surfaces are parallel PX, PY, or PZ planes and the cut depth is incorrect, Moritz will give a warning.
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