Computer Graphics Part 4a (Drawing lines)

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Author:
simon123
ID:
216703
Filename:
Computer Graphics Part 4a (Drawing lines)
Updated:
2013-04-29 21:35:54
Tags:
computer graphics informatics science
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Description:
University of Edinburgh School of Informartics Copmuter Graphics (Level 10) Revision Cards created by Simon M.
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  1. describe the process of drawing a line
  2. Why does a simple line algorithm (increment x, calculate x, parse int) not work for line drawing?
  3. what does DDA mean? give parametrix form of a line..
    • DDA = Digital Differential Analyser
    • (finite differences)

  4. Explain how the DDA algorithm works
  5. What is the problem with the DDA algorithm?
    There is a lot of floating point arithmetic: 2 "rounds" and 2 adds per pixel

    -> Integer arithmetic is easier to implement in hardware

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