Solved

Please help understand these lecture notes on Bresenham's Line Algorithm

Posted on 2009-05-03
3
301 Views
Last Modified: 2013-11-19
Why are d1 and d2 introduced?

What does the "relative distances of 2 pixels from the actual position" mean?

Thanks in advance
page1.jpg
page2.jpg
page3.jpg
0
Comment
Question by:jtiernan2008
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 84

Assisted Solution

by:ozo
ozo earned 300 total points
ID: 24291975
> Why are d1 and d2 introduced?
To avoid having to write (y-yi) and (yi+1-y) every time
0
 
LVL 84

Accepted Solution

by:
ozo earned 300 total points
ID: 24291983

> What does the "relative distances of 2 pixels from the actual position" mean?
It means the difference between the two distances, or which distance is larger
0
 
LVL 27

Assisted Solution

by:aburr
aburr earned 200 total points
ID: 24292237
Each pixel has an actual position determined by the x and y pair for that pixel.
[example. Pixel 1 has a position of (7 ,7), Pixel 2, in a different direction has a position of (-7, -7)]
The relative position is the distance between the pixels.
[In this example 98 units]
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

We are taking giant steps in technological advances in the field of wireless telephony. At just 10 years since the advent of smartphones, it is crucial to examine the benefits and disadvantages that have been report to us.
When we purchase storage, we typically are advertised storage of 500GB, 1TB, 2TB and so on. However, when you actually install it into your computer, your 500GB HDD will actually show up as 465GB. Why? It has to do with the way people and computers…
It is a freely distributed piece of software for such tasks as photo retouching, image composition and image authoring. It works on many operating systems, in many languages.
Learn the basics of inputting and editing your text components in Prezi. We will cover how to set styles, position, and group your text components. In your Prezi editor, click anywhere on the canvas to add text: A flashing cursor informs you that yo…

690 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question