Mapping the keyboard from ObserverSim to SAT-M was more
difficult than mapping the mouse. In the interest of limited development time, we
chose to use drop down menus, rather than include a fully functional keyboard.
This resulted in the elimination of user controlled walking motion. In ObserverSim
pressing W, A, S or D moves the user forward, left, right or backwards
respectively. Just as in FOPCSim, we chose to have the user stationary; with one
less input to map we were able to keep SAT-M controls simple.
ObserverSim not only uses the keyboard to move around the VE
world, but also uses it for entering mission data. In SAT-M we chose to either
auto populate the mission data, or use dropdown menus. Auto populating the
data required additional logic to ensure that the user had collected the data that
was to be auto populated. We ensured that the drop down menus had the
pertinent options given the missions the user could execute. Using drop down
menus limits the flexibility of the software but allowed us to avoid the
implementation of a virtual keyboard and the underlying logic for parsing the
inputs. In the experiment, see Chapter VII, a few of the research participants had
an issue with the way we mapped ObserverSim’s (Figure 7) keyboard inputs to
SAT-M’s touchscreen.
The Dell Precision M6300 laptops that come with the DVTE suit
have 17” displays, this equate to three times the area of the Asus Transformer
Pad Infinity’s 10.1” display. To compensate for the small screen size the mapping
of icons and viewable area was altered. Figures 7 and 8 are screen captures
from ObserverSim and SAT-M respectively, both taken in the naked eye view.
Differences between the two include the placement of the JFO tool icons, the
relative size of the icons, and the decision to have SAT-M’s icon tool bar occlude
the background.
In SAT-M the JFO tool icons were placed in an occluding bar and
on the side of the screen to facilitate the touchscreen interface. As mentioned
earlier, having the icons on the side of the screen makes the icons easier to
select when the user is holding the tablet. Having the toolbar occlude the
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