trackball betydelse and definition

Exempel på trackball

• The icons are generally activated by an on-screen pointer controlled by a mouse or trackball.

• Two large buttons sit on either side of the trackball and replicate the left and right mouse buttons.

• The idea was to grasp the stick in the palm of the hand and manipulate the trackball with the thumb.

• Since this mouse is an optical mouse, the mouse fails when sufficient sunlight leaks into the trackball.

• For each image, the perimeters of the right ventricular cavity were traced using an off-line trackball algorithm.

• Efficient controls, those with a high ratio of degrees of freedom to selection overhead, are: touchpads, trackball; spaceball; motion-tracking glove.

• However, when used outdoors in bright sunlight, we often had to shade the trackball with the user's second hand in order for it to function properly.

• Together with light pens and trackballs, it was offered as optional input device for their system since 1968.