Computer Graphics - Graphics Operations

6. Reflection of a point about x-axis, followed by a counter-clockwise rotation of 90°, is equivalent. to reflection about the line

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7. (2,4) is a point on a circle that has centre at the origin. Which of the following point(s) is/are also on the circle?

  • Option : D
  • Explanation :
    Since the circle with centre at the origin, is symmetric about the X-axis, Y-axis, the line X = Y and the line X = - Y, the reflection of (2, 4) about these axes, will also be points on the circle.
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8. The people of the planet Mars designed a scale for measuring the temperature in which water freezes at 100 units and boils at 250 units. The people of Jupiter designed a scale in which water freezes at 75 units and boils at 300 units. A temperature of 200 units in Mars will measure ___ in Jupiter.

  • Option : B
  • Explanation :
    Translating so that both the scales start at the origin, and scaling so that the divisions in both scales coincide, we get the formula (M-100) x 225/150 = J-75, where M refers to the scale in Mars and J, to the scale in Jupiter.
    Putting M = 200,
    we get J = 225.
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9. In Sutherland-Hodgman algorithm for polygon clipping, assume P (present point) lies inside the window and S (previous point) lies outside the window. Then, while processing through that window boundary, we should

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10. Assuming that one allows 256 depth value levels to be used, how much memory would a 512 x 512 pixel display require to store the Z-Buffer?

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Syllabus Covered in this section is –

  • Display systems
  • Input devices
  • 2D Geometry
  • Graphic operations
  • 3D Graphics
  • Animation
  • Graphic standard
  • Applications. Concepts
  • Storage Devices
  • Input Tools
  • Authoring Tools.
  • Graphics Application
  • Files and Operations

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