"A hidden surface algorithm for computer generated halftone pictures" (HTML gateway to PDF). University of Utah. "The algorithm was Warnock's doctoral thesis.

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 715 times in the last 30 days. (as of: 06/06/2013)

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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 ...

www.wikipedia.org/wiki/Warnock_algorithm

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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

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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

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Warnock algorithm: Information from Answers.com

Warnock's Algorithm A hidden-line removal algorithm that is based on recursive subdivision of the scene until areas are obtained that are trivial to compute.

www.answers.com/topic/warnock-algorithm

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Hidden Surface elimination: Area Subdivision or Warnock's Algorithm

Hidden Surface elimination: Area Subdivision or Warnock's Algorithm. Posted on October 7, 2012 Written by admin Leave a Comment. 1) Initialize the area.

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

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

Mar 18, 2011 ... That was it! That was the moment that Warnock crystallized for me just how in- touch he was with his products and his engineers. It epitomized ...

www.coronalabs.com/blog/2011/03/18/the-warnock-algorithm-or-rather-the-warnock-influence/

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Warnock's algorithm - Patheos

Dec 8, 2003 ... Oxford Reference Online describes “Warnock's algorithm A hidden-line removal algorithm that is based on recursive subdivision of the scene ...

www.patheos.com/blogs/adrianwarnock/2003/12/warnocks-algorithm/

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CS 488 Lecture 10 - Electronic Visualization Laboratory

Dec 6, 1999 ... Warnock's algorithm is a recursive area-subdivision algorithm. Warnock's algorithm looks at an area of the image. If is is easy to determine ...

www.evl.uic.edu/aej/488/lecture10.html

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Lecture 36

Eg. Roberts algorithm, Warnock's algorithm b. Image Space algorithms. • The algorithm is implemented in screen coordinates. Therefore total computions are nN ...

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

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Mobility & Entrepreneurship | The Warnock Algorithm or, rather, the ...

Mar 31, 2011 ... Even before Xerox, John Warnock was already famous. He was known for the Warnock algorithm, a hidden surface removal algorithm ...

www.carlosicaza.com/2011/03/31/the-warnock-algorithm-or-rather-the-warnock-influence/

Search results for "Warnock algorithm"

Google: approx. 70.200

Warnock algorithm in science

Warnock algorithm - Wikipedia, the free encyclopedia

Warnock algorithm: Information from Answers.com

Warnock's Algorithm A hidden-line removal algorithm that is based on recursive ... "The algorithm was Warnock's doctoral thesis. ... Oxford University Press.

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 ...

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

The Warnock algorithm or, rather, the Warnock Influence. Posted on March 18, 2011 . Written by Carlos Icaza. That was it! That was the moment that Warnock crystallized for me just how in-touch he was with his .... Schools and Universities ...

Mobility & Entrepreneurship | The Warnock Algorithm or, rather, the ...

Mar 31, 2011 ... He was known for the Warnock algorithm, a hidden surface removal ... of distinguished graphics pioneers that studied at theUniversity of Utah.

The Innovator | Continuum - Continuum - University of Utah

Apr 18, 2013 ... University of Utah alum and Adobe pioneer John Warnock recollects his ... That 1969 thesis outlined the “Warnock algorithm for hidden surface ...

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

ii. A HIDDEN SURFACE ALGORITHM FOR COMPUTER. GENERATED HALFTONE PICTURES. 14. John E. Warnock. Utah University. Prepared for: Advanced ...

Books on the term Warnock algorithm

Computer Graphics and Geometric Modeling

The Warnock visible surface determination algorithm [Warn69] is an image space algorithm that attempts to find rectangular regions (here called windows) of the same intensity on the screen (area coherence). Algorithm 7.6.1 is an outline of ...

Computer graphics: theory into practice

5.2.5 Warnock's algorithm Methods that handle the hidden surface problem through space subdivision exploit the concept of spatial coherence, which is the notion that areas located close back face front face Figure 5.7 • Front and back 5.2 ...

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

Y Vi Vs Vl 2/3 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.

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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
www.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

Mobility & Entrepreneurship | The Warnock Algorithm or, rather, the Warnock Influence
www.carlosicaza.com/2011/03/31/the-warnock-algorithm-or-rather-the-warnock-influence/

The Innovator | Continuum

By Jason Matthew Smith
Published Spring 2013.

continuum.utah.edu/features/the-innovator
Anna University Syllabus Materials and Question Papers: COMPUTER GRAPHICS

Code No: R5420307 1IV B. Tech.

questionsearch.blogspot.com/2013/05/computer-graphics.html
adrianwarnock.com: Warnock's algorithm

Blog by Adrian Warnock and Home of the Warnies

adrianwarnockold.blogspot.com/2003/12/warnocks-algorithm.htm
Visible Surface Algorithms (Basic Computer Graphics) Part 2

Warnock and Weiler-Atherton Area Subdivision The Warnock visible surface determination algorithm [Warn69] is an image space algorithm that attempts to find rectangular regions (here called windows) of the same intensity on the screen (area coherence). Algorithm 7.6.1 is an outline

what-when-how.com/computer-graphics-and-geometric-modeling/visible-surface-algorithms-basic-computer-graphics-part-2/
Amit's World...things I’ve Learned: Computer Graphics

Download Computer Graphic Lab ManualDownload Computer Graphic Oral QuestionDownload OOP Programming lab manualDownload CG program
210251: COMPUTER GRAPHICS
Teaching Scheme Examination Scheme
Lectures: 3 Hrs/week Theory: 100 Marks
Prerequisite: Knowledge of C Programming and Basic Data Structures &
Mathematics
Learning Objectives
1. To understand basics of computer graphics
2.

avscomputer.blogspot.com/2010/01/computer-graphics.html
Engineering Notes: CG

Subject : Computer Graphics. .

notesforcomp.blogspot.com/2012/01/subject-computer-graphics.html
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