make it global), because if you free it up at any time, you lose your transient elements and they immediately disappear. The important thing to note is that you must create a single transient element and leave it defined while your application is running (ie.
The transient element works in a similar manner to the element descriptor, meaning that it can be complex and can consist of many smaller elements. The element is persistent, but it doesn't physically exist. An example of a transient element is the little cell-origin cross that's created when you use the DEFINE CELL ORIGIN command. Transient elements are special elements that are created within the DGN database, they're just not actually added to the DGN file. For developers like us, we often create temporary display elements as 'user-helpers', so this display-healing that takes place automatically removes our temporary elements from the display! Nice feature, I guess.Īnyway, after spending a couple of hours trying to figure out why my temporary elements, that had been working in every version of this MDL app since MicroStation SE, were now not working, I learned about 'transient' elements. Using the DirectDraw engine, it's constantly 'healing' the display, showing only the elements that exist in the model's database. I discovered that MicroStation V8i handles its display quite differently than previous versions. Well, I just learned something new today.
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