Computer Graphics Lecture 2: Input Devices and Image Formation
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Questions and Answers

Which type of input devices allow a user to indicate a particular location on the display?

  • Data tablets
  • Physical devices (correct)
  • Logical devices
  • Spaceballs
  • What type of device returns character codes like ASCII?

  • Data tablet
  • Joystick
  • Physical keyboard (correct)
  • Spaceball
  • Which input device provides absolute positioning?

  • Spaceball
  • Mouse
  • Data tablet (correct)
  • Joystick
  • Which input device is well suited for applications such as flight simulators and games?

    <p>Joystick</p> Signup and view all the answers

    Which device looks like a joystick with a ball on the end of the stick?

    <p>Spaceball</p> Signup and view all the answers

    Which device provides relative positioning and may not always be desirable?

    <p>Mouse</p> Signup and view all the answers

    Which type of devices are suitable for three-dimensional graphics?

    <p>Logical devices</p> Signup and view all the answers

    What are the two major characteristics that describe the logical behavior of an input device?

    <p>The measurements returned and the time when the measurements are returned</p> Signup and view all the answers

    In computer graphics, how are images formed?

    <p>By following rays of light from a point source</p> Signup and view all the answers

    What are the three modes that describe the measure of a device?

    <p>Request-mode, Sample-mode, Event-mode</p> Signup and view all the answers

    What process is analogous to how images are formed in computer graphics?

    <p>Physical imaging systems</p> Signup and view all the answers

    What is one way to form an image in computer graphics?

    <p>Following rays of light from a point source</p> Signup and view all the answers

    What is light in the context of computer graphics?

    <p>Part of the electromagnetic spectrum that causes a reaction in our visual systems</p> Signup and view all the answers

    What is the function of a pinhole camera in forming images?

    <p>&quot;It provides a means of forming images from objects by following rays of light from a point source&quot;</p> Signup and view all the answers

    What must be combined to produce a two-dimensional image in image formation?

    <p>Objects, Viewers, Light source(s), Material properties</p> Signup and view all the answers

    What is the measure process defined by in the three distinct modes?

    <p>The relationship between the measure process and the trigger.</p> Signup and view all the answers

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