The Warnock algorithm is a hidden surface algorithm invented by John Warnock
... University of Utah. The algorithm was Warnock's doctoral thesis. , 32 pages

Warnock algorithm

The Warnock algorithm is a hidden surface algorithm invented by John Warnock that is typically used in the field of computer graphics. It solves the problem of rendering a complicated image by recursive subdivision of a scene until areas are obtained that are trivial to compute. In other words, if the scene is simple enough to compute efficiently then it is rendered; otherwise it is divided into smaller parts which are likewise tested for simplicity.

This is a divide and conquer algorithm with run-time of , where n is the number of polygons and p is the number of pixels in the viewport.

The inputs are a list of polygons and a viewport. The best case is that if the list of polygons is simple, then draw the polygons in the viewport. Simple is defined as one polygon (then the polygon or its part is drawn in appropriate part of a viewport) or a viewport that is one pixel in size (then that pixel gets a color of the polygon closest to the observer). The continuous step is to split the viewport into 4 equally sized quadrants and to recursively call the algorithm for each quadrant, with a polygon list modified such that it only contains polygons that are visible in that quadrant.

This is an excerpt from the article Warnock algorithm from the Wikipedia free encyclopedia. A list of authors is available at Wikipedia.

This is a divide and conquer algorithm with run-time of , where n is the number of polygons and p is the number of pixels in the viewport.

The inputs are a list of polygons and a viewport. The best case is that if the list of polygons is simple, then draw the polygons in the viewport. Simple is defined as one polygon (then the polygon or its part is drawn in appropriate part of a viewport) or a viewport that is one pixel in size (then that pixel gets a color of the polygon closest to the observer). The continuous step is to split the viewport into 4 equally sized quadrants and to recursively call the algorithm for each quadrant, with a polygon list modified such that it only contains polygons that are visible in that quadrant.

This is an excerpt from the article Warnock algorithm from the Wikipedia free encyclopedia. A list of authors is available at Wikipedia.

The article Warnock algorithm at en.wikipedia.org was accessed 541 times in the last 30 days. (as of: 10/31/2013)

Search results from Google and Bing

1

1

1

Warnock algorithm - Wikipedia, the free encyclopedia

The Warnock algorithm is a hidden surface algorithm invented by John Warnock
that is typically used in the field of computer graphics. It solves the problem of ...

en.wikipedia.org/wiki/Warnock_algorithm

2

>30

2

Warnock's Algorithm

This fourth type of algorithm is a unique approach to hiding polygons. The
approch is this: 1> Take a given section of the screen (the entire screen, in the
first ...

www.cs.helsinki.fi/group/goa/render/piilopinnat/warnock.html

3

>30

3

Lecture 36

For real time applications faster algorithms are required which can ... used are
not part of the visibility algorithms. ... Eg. Roberts algorithm, Warnock's algorithm.

web.iitd.ac.in/~hegde/cad/lecture/L36_visibility.pdf

4

>30

4

Hidden Surface elimination: Area Subdivision or Warnock's Algorithm

Oct 7, 2012 ... 1) Initialize the area. 2) Create list of polygons by sorting them with their z values
of vertices. Eliminate disjoint polygons (polygons which are ...

www.moreprocess.com/computer-graphics/hidden-surface-elimination-area-subdivision-or-warnocks-algorithm

5

>30

5

Intro to Computer Graphics: Visible Surface Determination

object space algorithms do their work on the objects themselves before they are
converted to .... Warnock's algorithm is a recursive area-subdivision algorithm.

www.cs.uic.edu/~jbell/CourseNotes/ComputerGraphics/VisibleSurfaces.html

6

>30

6

Introduction of Warnock Algoritham |authorSTREAM

Mar 25, 2009 ... INTRODUCTION : INTRODUCTION The Warnock algorithm is a hidden surface
algorithm invented by John Warnock that is typically used in the ...

www.authorstream.com/Presentation/aSGuest15412-166980-introduction-warnock-algoritham-computer-graphics-algorithm-prakash-sc70688-education-ppt-powerpoint/

7

>30

7

Warnock's Algorithm - MediaLab

Warnock's Algorithm. A divide and conquer algorithm. Warnock(PolyList PL,
ViewPort VP) If ( PL simple in VP) then Draw PL in VP else Split VP vertically and
...

medialab.di.unipi.it/web/IUM/Waterloo/node68.html

8

>30

8

11.8 Warnock's Algorithm for Computer Graphics BCA 33 - Scribd

Oct 20, 2008 ... algorithm divides the screen into 4 equal parts and tries to apply step (i) ... this, in
any window, the algorithm classifies the polygons into three ...

www.scribd.com/doc/7395710/76/Warnock%E2%80%99s-Algorithm

9

>30

9

Hidden Surface Removal

The scan-line algorithm is another image-space algorithm. .... Warnock's algorithm classifies polygons with respect to the current viewing window into
trivial or ...

www.cs.sun.ac.za/~lvzijl/courses/rw778/grafika/OpenGLtuts/Big/graphicsnotes009.html

10

>30

10

z

Binary Space-Partitioning Trees. □ The z-Buffer Algorithm. □ Scan-Line
Algorithm. □ Visible-Surface Ray Tracing. (Ray Casting). □ Warnock's Algorithm
...

graphics.csie.ntu.edu.tw/~robin/courses/3dcg08/ppt/3dcg08_05vsd.pdf

Search results for "Warnock algorithm"

Google: approx. 60.900

Warnock algorithm in science

Warnock algorithm - Wikipedia, the free encyclopedia

John Warnock - Wikipedia, the free encyclopedia

At the University of Utah he was a member of the Gamma Beta Chapter of the
Beta ... In his 1969 doctoral thesis, Warnock invented the Warnock algorithm for ...

Warnock's Algorithm - MediaLab

Warnock's Algorithm. ... Warnock(PolyList PL, ViewPort VP) If ( PL simple in VP)
then Draw PL in VP else Split VP vertically and ... University of Waterloo

Warnock's Algorithm

This fourth type of algorithm is a unique approach to hiding polygons. The
approch is this: 1> Take a given section of the screen (the entire screen, in the
first ...

[PDF]A Hidden Surface Algorithm for Computer Generated Halftone Pictures

John E. Warnock ... particular It presents . new method for converting data
describing three- ... by Computer Science of the University of Utah, Salt Lake.

[PDF]z

Bing-Yu Chen. National Taiwan University. Page 2. Visible-Surface
Determination. □ Back-Face Culling. □ The Depth-Sort Algorithm ... Warnock's Algorithm ...

[PDF]A real—time visible surface algorithm

UNIVERSITY OF UTAH. I U NE '1 970 ... This research was supported in part by
the University of .... After Warnock's algorithm was developed, Bouknight [7].

The Innovator | Continuum - University of Utah

University of Utah alum and Adobe pioneer John Warnock recollects his path to a
... That 1969 thesis outlined the “Warnock algorithm for hidden surface ...

Books on the term Warnock algorithm

Computer Graphics and Geometric Modelling

7.6 Warnock and Weiler-Atherton Area Subdivision 273 it was sufficient to
choose the best from a few chosen at random (five seemed to work well). We
have just described the original BSP algorithms. Variants have been developed
since then ...

Masterminds of Programming: Conversations with the Creators of Major Programming Languages (Theory in Practice...

Masterminds of Programming features exclusive interviews with the creators of several historic and highly influential programming languages. In this unique collection, you'll learn about the processes that led to specific design decisions, including the goals they had in mind, the trade-offs they had to make, and how their experiences have lef...

Computer Graphics: A Practical Approach, Concepts, ...

Q.19. Q.20. Q.21. Q.22. Explain the following i (a) Painter's algorithm (b) Warnock's algorithm [JNTU, Hyderabad, B.Tech (Mech)— 2"'I sem., April/May
2005] (a) What is the minimax test used in Z-buffer algorithm? When the mini-max
test fails?

The History of Visual Magic in Computers: How Beautiful Images are Made in CAD, 3D, VR and AR

From the reviews:“It is dedicated to ‘the thousands of people over thousands of years who have developed the building blocks and made the discoveries in mathematics and science to make such 3D magic possible.’ … The brilliant timing of The History of Visual Magic in Computer … provides a new magical dimension on the time span to the topic, both fas...

Computer Graphics

Warnock introduced this method in the year 1969. This is a very primitive and
basic algorithm and it is also a very lengthy algorithm. Also, the process
increases with the increased resolution of the scene. This algorithm divides the
scene into ...

Computer Graphics, Multimedia and Animation

X Figure 12.11: Incremental method for depth calculation. 12.3 Warnock's Algorithm Warnock's algorithm makes use of area coherence. Here, coherent
area in the image space is found out by the repeated area subdivision method.
Hence, the ...

Development of Google searches

Online sources for the term

Warnock algorithm

Warnock algorithm

A summary of the Warnock algorithm

medialab.di.unipi.it/web/IUM/Waterloo/node68.html
Blog posts on the term

Warnock algorithm

Warnock algorithm

The Warnock Algorithm or, rather, the Warnock Influence | Corona Labs

John Warnock (co-founder of Adobe) is not just known for being the mind behind Adobe, PostScript, and Acrobat. Prior to Adobe, he worked for Xerox PARC and was one of the foremost scientists in leading the effort for JaM (“J” being John; “M” being Martin Newell, famous for the Utah Teapot), the precursor to PostScript.

coronalabs.com/blog/2011/03/18/the-warnock-algorithm-or-rather-the-warnock-influence/
Hidden Surface elimination: Area Subdivision or Warnock’s Algorithm
www.moreprocess.com/computer-graphics/hidden-surface-elimination-area-subdivision-or-warnocks-algorithm

adrianwarnock.com: Warnock's algorithm

Blog by Adrian Warnock and Home of the Warnies

adrianwarnockold.blogspot.com/2003/12/warnocks-algorithm.htm
Introduction of Warnock Algoritham |authorSTREAM

Introduction of Warnock Algoritham - authorSTREAM Presentation

www.authorstream.com/Presentation/aSGuest15412-166980-introduction-warnock-algoritham-computer-graphics-algorithm-prakash-sc70688-education-ppt-powerpoint/
11.8 Warnock’s Algorithm for Computer Graphics BCA 33

Computer Graphics BCA 33 - Free download as PDF File (.pdf), Text file (.txt) or read online for free.

www.scribd.com/doc/7395710/76/Warnock%E2%80%99s-Algorithm
12

More cyclopaedia entries

1. Warnécourt

2. Warnocked

3. Warnoleka

9. Warnow

12. Warnow, Güstrow

13. Warnow, Gustrow

19. Warnow (Gustrow)

20. Warnow (river)

21. Warnow-West

22. Warnower

23. Warnowo

25. Warnowtunnel

26. Warns

27. Warns, Friesland

28. Warnsdorfer FK

31. Warnupiany

32. Waroch

33. Waroch II

34. Waroeng

35. Waronker