Or Elements
Or elements perform a logical Or operation
on a list of conditions. Their output is True if any of their inputs are True.
Although this can also be done using an Expression, an Or element provides a
somewhat more convenient and user-friendly way to do this, particularly if a
large number of items are involved. More importantly, the element explicitly
illustrates the operation being carried out, increasing the transparency of your
model and allowing you to create easy-to-read conditional logic diagrams.
The properties dialog for an Or
element looks like this:
Or elements have a single output, which is always a scalar condition. If all
of the input conditions to an Or element are False, the output is False;
otherwise, the output is True. You add an input to the element by pressing the
Add Input button. A browser tree showing all of the elements in the model is
displayed.
Note that this tree is organized by containment in the same
manner as the main browser. To insert a link from this dialog, you select a
specific output object (or an element having a primary output), and then press
OK. If you press Cancel, GoldSim will insert a new blank (False)
item. In either case, the dialog will close and the item will be added to the
list of inputs for the element.
The inputs to the Or must all be conditions. Note, however,
that the inputs can be conditional expressions (in addition to simply links).
You can edit any of the input fields after the input is added (and can insert
links using the context menu for the input field).
Note: An Or element with no defined
input conditions evaluates to False.
As shown below, the browser view
of an Or element shows a single output, and an input for each input
condition:
Note: Element inputs and outputs are
only shown in the browser if you choose to Show Element Subitems
(accessed via the browser context menu by right-clicking in the
browser).
An example model which uses the Or element, as well as
other logical elements (Logical.gsm) can be found in the General Examples folder
in your GoldSim directory (accessed by selecting File | Open Example...
from the main menu).
Related Topics…