3 Using the Smart-NAV
3.1 Head Control How-To
3.1.1 How it works
The Smart-NAV works by tracking infrared light reflected off the dot on your forehead, glasses, headset or TrackHAT.
- Put on the TrackHAT or peel a dot from the sheet and place it on your forehead, bridge of your glasses, or headset microphone, etc.
- Place the Smart-NAV unit on top of your monitor or clip to the top of your laptop screen.
- Make sure the Smart-NAV unit is plugged in and the software is running.
- Aim the Smart-NAV unit at your head.
- First time users should select a slow to medium profile.
- Sit in a comfortable position with your head facing toward the monitor about 1 arms length away from the Smart-NAV unit.
- Move the cursor from one side of the monitor to the other and back by rotating your head. Large head movements are not necessary.
- Once you get used to the feel of the cursor movement, try increasing your speed setting. The faster your speed setting, the less you have to move your head to move the cursor from point A to point B.
- Practice and get comfortable using your Hot Keys, external switch, or Dwell Clicking while moving the cursor with your head.
The Smart-NAV unit MUST be able to see your dot. When deciding where to place the dot, make sure to check the line of sight between the unit and dot from all angles. Please look at the pictures below for hints on dot placement.
3.1.4 Cursor Modes
There are two different ways to control the cursor using the SmartNAV, which allows users to choose the mode that feels the most natural.
This is the easiest cursor control mode for a new user to get used to. It works in the same kind of way that a regular mouse does, bumping the cursor against the edge of the screen allows the user to change the relationship between their head position and the location of the cursor on the screen. Pressing the Center Hotkey will re-center the cursor on the screen.
Absolute mode is intended for advanced SmartNAV users, and allows a fixed relationship to be set up between the head location and the cursor position. Bumping the cursor against the edges of the screen will not change the relationship of the cursor to the users head position. Pressing the Center Hotkey will reset the relationship and re-center the cursor on the screen. Therefore, the user should make sure that their head is positioned where they wish the new center to be when they re-center.
The SmartNAV provides three different methods for clicking within Windows.
The SmartNAV software allows the user to re-map keys from their keyboard and assign them to emulate the Left, Right and Middle mouse buttons. This provides a convenient way to click without having to take your hands off the keyboard.
SmartNAV software versions 3.20.025 and higher support using modifiers with non-clicking hotkeys, you can add modifier keys such as Ctrl+Z or Alt+Z to hotkey commands.
Please note that it is no longer possible to map just a modifier key to a hotkey function. The reason for this is so that they must not not be "trapped" and so that they can continue to function as modifier keys in other applications.
Ability Switch Clicking
(only available on SmartNAV EG and AT models)
Ability switches provide an alternative clicking method that can be operated by hand, foot or sip-and-puff switches. On the side of the SmartNAV there is an industry standard Ability Switch jack which allows users to plug Ability Switches in to perform various actions. By default the switches are mapped to emulate the Left and Right mouse buttons, but may be configured to perform other functions related to the SmartNAV software such as Middle Click, Pause, Scroll or Precision Mode.
(only available on SmartNAV AT models)
Dwell Clicking is a complete hands-free clicking method which allows the user to send clicks by simply holding the cursor still over the item they wish to click on. The Dwell Clicking software is a complete package which allows the user to perform all of the tasks that can be accomplished with a mouse, such as Left Click, Double Click, Right Click and Drag.
(Available on All SmartNAV models)
Voice activated clicking allows you to issue mouse clicks and commands by speaking to your computer. Simply say 'left click' and a left click will be performed. This powerful feature makes the SmartNAV more intuitive to use than ever and does not come with any other hands free mouse package, we hope you enjoy using it!
Left down - left button down
Left up - left button up
Left click - left button down and up
right down - right button down
right up - right button up
right click - right button down and up
middle down - middle button down
middle up - middle button up
middle click - middle button down and up
Double click - left button up/down twice
Enter - presses the enter key
Precision - start / stop precision mode
Scroll - start / stop scrolling
Pause - start / stop pause mode
Center - center the cursor (said only once)
Activate - used in key activation mode to start / stop mode
The Grammar File
The above commands are defined in grammar.bnf, a text file that can be edited by the user, these are only the default values.
You can edit the commands in the grammar.bnf file from within WordPad. Open the file (located in 'C:\Program Files\Naturalpoint\SmartNAV) with Wordpad and change the text that is NOT in quotes.
Remember when changing the speech commands to only change text outside of quotes. Do not change the order of items, the text in quotes "" or their IDs.
Please let us know if you have any problems.
Do not plug the microphone in to the jack on the SmartNAV. The input jack on the SmartNAV device is for input switches, not microphones.
Please see sections 2.3.6 (Voice Clicking Installation) and 4.2.3 (Clicking Tab) for details about how to enable speech recognition if it is not running.
3.1.6 Suggested Alternate Dot Placements
There are many different locations where the reflective dot can be placed for tracking, here are two examples.
3.1.7 Status LED indicators
The SmartNAV camera has status LEDs which give the user visual cues about the status of the SmartNAV software. There are two Status LEDs, one is located on the front directly above the infrared shield, and the other is on the underside of the SmartNAV camera which will cause the case to "glow" blue when it is illuminated. Use the following key to interpret what the state and color of the status LEDs mean.
Front Status LED
- Off : No object is being tracked, and cursor movement is NOT paused.
- Green : An object is being tracked, and cursor movement is NOT paused.
- Orange : An object is being tracked, and cursor movement IS paused.
- Red : No object is being tracked, and cursor movement IS paused.
Case Status LED
- Off : The software is operating in Relative cursor positioning mode.
- Glowing Blue : The software is operating in Absolute cursor positioning mode.