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Input and Interaction Dr. Yingcai Xiao

Input and Interaction Dr. Yingcai Xiao. A good user interface allows users to perform interaction tasks with ease and joy. WYSIWYG (What you see is what you get). Four basic interaction tasks: position, select, quantify, text Basic design principle: Look and Feel. Hardware

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Input and Interaction Dr. Yingcai Xiao

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  1. Input and InteractionDr. Yingcai Xiao

  2. A good user interface allows users to perform interaction tasks with ease and joy. • WYSIWYG (What you see is what you get). • Four basic interaction tasks: position, select, quantify, text • Basic design principle: Look and Feel

  3. Hardware • Locators: • relative devices: mice, trackballs, joysticks • absolute devices: data tablets, touch screen, Kinect • direct devices: light pens, touch screens • indirect devices: mice, trackballs, joysticks • continues devices: mice, trackballs, joysticks • discrete devices: control keys

  4. Keyboards: • QWERTY(slow down typing) • Dvorak, order by frequency of use • alphabetic order

  5. Valuators: • bounded: volume control on radio • unbounded: clock Choice Devices: • function keys • foot switches Haptic Devices: • pressure-sensitive stylus • force-feedback controls (haptic)

  6. 3D Interaction Devices • Joysticks with a shaft that twists for a third dimension • Kinect 3D camera • Polhemus 3D sensors

  7. VR: virtual reality, immersive, head-mounted • data glove

  8. The Evolution of User Interface CLI (Command Line Interface) Keyboard GUI (Graphical User Interface) Mouse NUI (Natural User Interface) • Kinect sensor (A/V)

  9. Basic Interaction Tasks (BITS) • position: by pointing (GRAPHICS) • selection: by name (DB), by pointing • GUI: hierarchical pull-down menu, radio-buttons. e.g. Format->Paragraph… • text interaction: keyboard-->text-string • quantify interaction: dials, sliders • 3D interaction tasks: Z value • multiple views, shift + button-down • gestures • voice

  10. Composite Interaction Tasks (CITs) • dialogue boxes • Rubber-banding

  11. Interaction-Technique Toolkits • get user input (control) ==>events • graphical output (feedback) ==>display • graphic device interfaces: GDI X Windows Toolkit (UNIX) Windows API (PC) JAVA Swing • Standard APIs for input hardware: not there, need standards. • NUI: OpenNI, MS Kinect SDK • Haptic: OpenHaptics Toolkit

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