Handling of Current Subpictures

The current handling in Drafting keeps track of current subpictures in a drawing. If no action is taken, the current subpicture will be the created default subpicture as explained above. All created geometry will belong to the current subpicture structure. With the function CURRENT it is possible to make a selected subpicture current and possibly order the system to create new ones. The following activities can be performed: An existing level 3 subpicture in the drawing can be made current.

Note: Geometry added to a subpicture with an model data will be lost after a hidden line removal. In this case, a new level 3 subpicture should always be created (see below).

A new subpicture can be made current although it is not created until the first geometry is added. The level of the new subpicture can be defined in two ways: by user or by the system. When user choice, the superior owner is indicated and the level of the new subpicture will then be one below this owner. By selecting Operation Complete, the level of the new subpicture will be 1. Thus, new subpictures of level 1-3 can be created explicit. When system choice, the owner is also indicated but the system decides the appropriate level of the new subpicture. This level can be 2 or 3 depending on the contents of indicated owner.

When the current drawing scale is changed, a new level-1 subpicture (view) will always be made current.

There is yet another way to define the current structure: by selecting the Automatic choice. This means that subsequent geometry added to the drawing will structurally belong to the "closest" level-3 subpicture, in a geometric sense.