Input and Output Devices in Computer Science: Characteristics and Examples - Prof. Francoi, Study notes of Computer Science

Download Input and Output Devices in Computer Science: Characteristics and Examples - Prof. Francoi and more Study notes Computer Science in PDF only on Docsity! Questions? • Project #3 • Homework #5 is due today • Homework #6 is out today • Midterm in a week and a half Computer today Input devices characteristics • Degrees of Freedom – Rotary knob: (1 DOF), Mouse (2 DOF)… – SpaceBall (6 DOF), 2 Handed Polhemus (12 DOF) • Isometric or Isotonic – TrackPoint versus mouse • Relative or absolute – Mouse versus a pen on the screen • Direct or indirect – Working on your desk versus working on the screen • Linear or rotary – Knob versus a slider Design space of input devices [Card et al.] eS ~ \ Linear Rotary NS xX Y Z r™X ry 1Z NN | 110100% A410 1006 | 1101000 | 110100 | 110 100/110 100% ~~] oO O- : ae als r, oO < 5 P NO 7 y O O O oO be 2 O—0--0--+-+-----0 7 e 3p \ O-----O--<--O dA } F oO O- O_o ‘O; oO T 8 o——O a 2 o \ € ar \ at © a“ \ oo \ Some Insights • Isometric or Isotonic – Isotonic best for position – Isometric best for rate control • Good driver difficult to implement • Relative or absolute – Relative saves space – Absolute faster • Direct or indirect – Direct is faster – Indirect maybe more ergonomic