Screen Method

This method emulates a scaled real screen allowing users to move the mouse pointer as the were using a real mouse which means: "where your head is the mouse will be". With this method the user should increase the head movement as it emulates a real screen in the point mapper.

Understanding the Screen Method

As shown in the "Screen Movements Image", the screen method profile draws a square in the point mapper that represents a scaled screen emulator. Each movement of the green point inside the screen emulator will be interpreted as real mouse movements. The mouse pointer position in the real screen is calculated using this formula:

Y = (Position_Y / vScreen_height) * Screen_height 

X = (Position_X / vScreen_width) * Screen_width 

Where Position_[ X and Y ] are the X and Y coordinates of green point in the point mapper, the vScreen_[ height and width ] are the width and heigh of the screen emulator and the Screen_[ height and Width] are the width and height of the real screen.

Using Screen Method

The best way to use the screen method is combining it with other assistive technologies as MouseTweaks? that will allow users to perform mouse clicks.

The movements, as explained before, will be performed each time the green point is moved inside the screen emulator which means the mouse pointer will be moved each time the user moves the head.

The screen emulator size can be modified drawing a new square inside the point mapper. To draw a new square it is necessary to click inside the point mapper in the position where the square should start and then (holding the button down) move the mouse pointer increasing the new square size. When the desired size is reached just release the mouse button.

Images

Screen Movements Image