2.5/2.6/2.7

 Virtual Reality presents a world in 3d space  Regular input devices such as a mouse only has 2 degrees of movement when 6 is needed for true VR freedom.  Aircrafts use controls that function in 3d space ◦ Many games and desktop virtual reality use similar controls

 3d Mouse ◦ Does not function only on a table top ◦ You can move:  Up and down angle (Pitch)  Left and right orientation (Yaw)  Twist on axis(Roll)

 Dataglove ◦ Used on high end VR systems ◦ Uses optical fibers in the glove to detect movement of the joints in the hand ◦ Also uses ultrasound sensors to determine 3D positional space ◦ High expense

 VR helmets ◦ Two purposes  Display 3D space  Track user’s head position ◦ Oculus Rift, Sony’s Project Morpheus  Whole-body tracking ◦ Tracks the different movements of the body ◦ Certain arcade games, special trampolines, 360 treadmills

 Seeing in stereoscopic ◦ Because our eye look at an object from different angles there are ways to “trick” the mind to see 3D objects from a 2D surface.  Two images are show, one to each eye.  Special glasses are used or special screens.  3D/VR motion sickness ◦ Occurs when poor display of the image occurs, confusing the brain and making you sick.  Simulators and VR Caves ◦ Full immersion experience  Flight simulators (in cockpit)

 Special Displays ◦ Dials, gauges, lights, LEDS ◦ HUDS (Heads up display)  Sound outputs ◦ Often used in conjunction with visual outputs ◦ Speech, beeps (and other noises), clicks, rings ◦ Auditory feedback  Touch, feel and smell ◦ Haptic devices- force, resistance, and texture ◦ Smell- Ability to trigger memory but cant be change rapidly.

 Generic controls ◦ Keyboard  Dedicated controls ◦ Microwave controls, washing machine dials  Infrared, movement, GPS, weight sensors  Speech sensors  Physiological sensors

 Printing types ◦ Dot Matrix  Line of pins (similar to a type writer) ◦ Ink jet and bubble jet  Fires a small jet of ink or heats a bubble for a dot ◦ Laser printer  Electrosstatic dots are deposited on a drum which rolls the ink onto a paper and heated.  Resolution for printing in dots per inch  Printers also vary in speed and cost  Wireless printers

 Fonts ◦ Some printers print in only one “typewriter” style font ◦ Others are more sophisticated have access to PostScript (a page description language) which allows for different font styles, curves, lines, and scaled bitmap images. ◦ Font has a point size (height), pitch (width) and shape (determined by name) ◦ Some fonts such as Courier have fixed pitch (same width.

 Word processors have a requirement in that they must be “What you see is what you get” ◦ WYSIWYG  Screen resolution is about 72 dpi while a laser printer has over dpi. ◦ Different conversions of size and color are used to print what is on the screen.

 Scanners take what is on paper and put them on an electronic document.  Scanner types ◦ Flat bed  On glass plate, page is converted to bitmap  Can also be pulled through ◦ Handheld  Same principle but moved by hand  A scanner head is passed over creating a bitmap strip ◦ Light is used to shine upon the page and the reflected light is measured

 Scanners resolutions are between 600 and 2400 dpi  Used extensively in desktop publishing where cutting and pasting are used often  Also used in storing paper files digitally  Optical character recognition(OCR) is the process where computers can determine what characters are on the page.