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Topic: Polygon (computer graphics)

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	Polygon (computer graphics) - Wikipedia, the free encyclopedia
		Polygons are used in computer graphics to compose images that are three-dimensional in appearance.
		Usually (but not always) triangular, polygons arise when an object's surface is modeled, vertices are selected, and the object is rendered in a wire frame model.
		This is quicker to display than a shaded model; thus the polygons are a stage in computer animation.
	en.wikipedia.org /wiki/Polygon_(computer_graphics) (171 words)

	Computer Graphics - Clipping (Site not responding. Last check: 2007-11-06)
		It is desirable to restrict the effect of graphics primitives to a subregion of the canvas, to protect other portions of the canvas.
		Note the difference between this strategy for a polygon and the Cohen-Sutherland algorithm for clipping a line: The polygon clipper clips against four edges in succession, whereas the line clipper tests the outcode to see which edge is crossed, and clips only when necessary.
		The input polygon is clipped against one edge and any points that are kept are passed on as input to the next stage of the pipeline.
	www.cc.gatech.edu /grads/h/Hao-wei.Hsieh/Haowei.Hsieh/mm.html (1077 words)

	comp.graphics.algorithms Frequently Asked Questions (Site not responding. Last check: 2007-11-06)
		The advantage is that the relative error incurred in the computation of r is also a function of the _differences_ between the vertices, and is not influenced by the _absolute_ coordinates of the vertices.
		Graphics code also cheats by associating artificial normal vectors with the vertices of polygonal models to simulate the reflection properties of curved surfaces; these are called "vertex normals".
		Qhull computes halfspace intersection by computing a convex hull.
	www.faqs.org /faqs/graphics/algorithms-faq (14436 words)

	3D Computer Graphics
		Computer games are older than the microcomputer, dating back to a few programs created to run o mainframes and minicomputers.
		This 3D graphics technique requires that some bitmapped images be created in order for them to be spliced together during run-time, thereby creating the realistic image that the player sees at each step of the maze.
		Before the discussion of how this graphics technique works, it is essential that the reader understand what ray casting really is. Ray tracing involves tracking rays of light through a computer —created image, in order to determine the color of those rays after they have reflected off of various surfaces.
	www.geocities.com /CapeCanaveral/5161/Jeff.html (3191 words)

	Polygon Triangulation
		Computing the triangulation of a polygon is a fundamental algorithm in computational geometry.
		In computer graphics, polygon triangulation algorithms are widely used for tessellating curved geometries, as are described by splines [Kumar and Manocha 1994].
		These polygons are computed from the trapezoidal decomposition by checking whether the two vertices of the original polygon lie on the same side.
	www.cs.unc.edu /~dm/CODE/GEM/chapter.html (837 words)

	Introduction to Computer Graphics
		Computer graphics is a wonderful invention in the field of Computers.
		Though it may look trivial, it is a major breakthrough in the graphical field which proved to the world that computers could be used interactively to produce graphic output on a CRT display.
		Maps data to device coordinates: All the geometric and non-geometric details in the datastructure are converted to one of the graphics output primitives and passed to the graphics system i.e.
	www.cs.fit.edu /~wds/classes/cse5255/thesis/intro/intro.html (1476 words)

	Computer Glossary-Computer Video and Graphics - PC Terms about Computer Video Graphics-Best Computer Online Store ...
		It is implemented by rendering polygons through a stipple mask whose on-off density is proportional to the transparency of the object.
		Since not all objects are easily modeled with polygons, chroma keying is used to include complex objects in a scene as texture maps.
		In raster graphics architecture a primitive is formed by scan conversion where each scan line intersects the primitive at two ends, P left and P right.
	www.directron.com /videoglossary.html (2540 words)

	Computer Graphics : Surface Modeling : 5 / 30 : Polygon Tables
		And the entries in the polygon table define a polygon by providing pointers to the edges that make up the polygon.
		We can eliminate the edge table by letting the polygon table reference the vertices directly, but we can run into problems, such as drawing some edges twice, because we don't realize that we have visited the same set of points before, in a different polygon.
		We can confirm that each polygon is closed, that each point in the vertex table is used in the edge table and that each edge is used in the polygon table.
	cs.anu.edu.au /escience/lecture/cg/surfaceModeling/polygonTable.en.html (400 words)

	Computer Graphics
		is the sequence of vertices defining a polygon and they are arranged in a counter-clockwise orientation around the perimeter.
		Selecting the first three vertices, we see that the enclosed angle (at p1) is a convex vertex (as opposed to tp3) and the resulting triangle does not contain any vertices of the polygon.
		We eliminate the vertex p1, and repeat the process on the remaining polygon.
	www.nova.edu /~margush/4650/73_triangulation.htm (219 words)

	CSC3406 Computer Graphics
		The best and most illustrative version of a polygon mesh is the wire used to build chicken houses (chicken wire).
		Conceptually, polygon meshes in computer graphics achieve exactly the same thing for the computer artist as the chicken wire does for a sculptor.
		These are used extensively in computer graphics programming for smoothing, lighting and shading objects.
	www.sci.usq.edu.au /courses/CSC3406/m06.html (499 words)

	Computer Graphics
		In many cases, the sign of the expression inside the absolute value function (rather than the actual area) is of great interest as it differentiates between a clockwise and counterclockwise orientation of the vertices.
		This computation may be put to effective use to determine the back-faces of a solid.
		In general, it is a bit wasteful to compute this complete area just to determine if a face is facing towards the eye or away.
	www.nova.edu /~margush/4650/62_trianglearea.htm (321 words)

	Computer Graphics FAQ's (Site not responding. Last check: 2007-11-06)
		Computer Graphics Resource Listing Maintained by Nick Fotis (nfotis@theseas.ntua.gr), the CGRL contains questions and answers about general graphics documents, sort of like this document.
		OTHER An automatic mail handler at Brown University allows users of "Computer Graphics: Principles and Practice," by Foley, van Dam, Feiner, and Hughes, to obtain text errata and information on distribution of the software packages described in the book.
		This is available as "Research Report YALEU/DCS/RR-639" from Yale University, it's also in the SIGGRAPH '91 Fractal Modeling in 3D Computer Graphics and Imaging course notes, and (best of all) it's available on the net, at princeton.edu, as /pub/Graphics/Papers/musg88.ms.Z. An implementation of this paper may be found in Rayshade.
	www.bergen.org /AAST/ComputerAnimation/Help_FAQs_Graphics.html (5979 words)

	Computer Graphics World - 25 Year Retrospective
		Charles Williams' "Metamorphosis of a Flower," the earliest example of computer art from our magazine (then known as Computer Graphics Newsletter), was created from a hand drawing that was digitized and then modulated by a beaded mosaic pattern.
		She chose the raycasting technique for its soft shadows and "moody" quality to set the tone for this representation of a bedroom belonging to a middle-class couple during the recession of the early '90s.
		Computer graphics imagery such as this revolutionized medical illustration.
	cgw.pennnet.com /Articles/Article_Display.cfm?Section=Articles&Subsection=Display&ARTICLE_ID=132487 (1716 words)

	Computer Graphics (Site not responding. Last check: 2007-11-06)
		Computer animation of the sphere version 32--39 Fred E. Robbins and William G. Green WAVE: interactive color graphics for waveform analysis.
		1--6 Richard B. McCammon An interactive computer graphics approach for dissecting a mixture of normal (or lognormal) distributions.
		25--32 B. Brown Computer graphics for large scale two- and three-dimensional analysis of complex geometries.
	www.math.utah.edu /ftp/pub/tex/bib/toc/siggraph.html (6203 words)

	Computer Laboratory - Computer Science Syllabus - Advanced Graphics
		It also provides an introduction to radiosity, animation, graphics cards, and current commercial uses of computer graphics.
		Revision of the ray tracing and polygon scan conversion methods of making images from 3D models; the pros and cons of each approach.
		Current uses of computer graphics in animation, special effects, Computer-Aided Design and marketing.
	www.cl.cam.ac.uk /DeptInfo/CST05/node80.html (423 words)

	Nan's Computer Graphics Page
		CS184 - Foundations of Computer Graphics - Spring 1998
		Computer Science 418: Computer Graphics (Cornell) (student anmiations)
		Procedural Methods for Computer Graphics (George Mason Univ.)
	www.cs.rit.edu /~ncs/graphics.html (565 words)

	Computer Graphics FAQ's (Site not responding. Last check: 2007-11-06)
		Archives may be found at: ftp://wuarchive.wustl.edu/graphics/graphics/mail-lists/comp.graphics.algorithms It is archived in the same manner that all other newsgroups are being archived there, namely there is an Index file with all the subjects, and all the articles are being kept in a hierarchy based on the year and month they are posted.
		You can get the code from: ftp://ftp.cs.unc.edu/pub/users/narkhede/triangulation.tar.gz Ray tracing bibliography: ftp://ftp.eye.com/pub/graphics/papers/rtbib95.tar.Z ftp://ftp.eye.com/pub/graphics/papers/rtbib95.zip Quaternions and other comp sci curiosities: ftp://ftp.netcom.com/pub/hb/hbaker/hakmem/hakmem.html Directory of Computational Geometry Software, collected by Nina Amenta (nina@geom.umn.edu) Nina Amenta is maintaining a WWW directory to computational geometry software.
		"Re-Tiling Polygonal Surfaces", Greg Turk, ACM Computer Graphics, 26, 2, July 1992 "Decimation of Triangle Meshes", Schroeder, Zarge, Lorensen, ACM Computer Graphics, 26, 2 July 1992 "Simplification of ObjectsRendered by Polygonal Approximations", Michael J. DeHaemer, Jr.
	www.bergen.org /AAST/ComputerAnimation/Help_FAQs_Algorithms.html (2982 words)

	Learn more about List of algorithms in the online encyclopedia. (Site not responding. Last check: 2007-11-06)
		Bellman-Ford algorithm: computes shortest paths in a weighted graph (where some of the edge weights may be negative)
		Dijkstra's algorithm: computes shortest paths in a graph with non-negative edge weights
		Ford-Fulkerson algorithm: computes the maximum flow in a graph
	www.onlineencyclopedia.org /l/li/list_of_algorithms.html (729 words)

	Computer Graphics
		ITTI Computer Graphics and Visualisation project - project is producing a modular set of training materials for the Higher Education community
		Graphics: specifications for various graphics file formats - bitmaps, geometry, animation, utilities
		Graphics Gems source code - nice collection of sources codes from Graphic Gems books
	www.geocities.com /~charlie_x/gfxlinks.htm (856 words)

	Inside Computer Graphics (Site not responding. Last check: 2007-11-06)
		Digital-Tutors are excited to announce the worldwide availability of "Fundamentals of Maya: Polygon and Sub-D Modeling" training kit - the latest release in a library of industry training resources for digital artists.
		In over 3.5 hours and 2 discs of innovative training methods, "Fundamentals of Maya: Polygon and Sub-D Modeling" guides users though the fundamentals of modeling an original concept monster in Maya.
		The concepts, methods, and tools used for each process are presented in clear and easy to follow steps, specifically designed to save the user time and frustration throughout the user's workflow.
	www.insidecg.com /news.php?id=1597 (498 words)

	List of algorithms (Site not responding. Last check: 2007-11-06)
		Bellman-Ford algorithm : computes shortest paths in a weighted graph (where some of the edgeweights may be negative)
		Dijkstra's algorithm : computes shortest paths in a graph with non-negative edge weights
		Application of quantum computation to variouscategories of problems and algorithms
	www.therfcc.org /list-of-algorithms-12297.html (806 words)

	Find in a Library: Monotone polygon intersection : geometry, computer applications, and computer graphics
		Monotone polygon intersection : geometry, computer applications, and computer graphics
		To find this item in a library, enter a postal code, state, province, or country in the field above.
		WorldCat is provided by OCLC Online Computer Library Center, Inc. on behalf of its member libraries.
	worldcatlibraries.org /wcpa/ow/600733185c2842dca19afeb4da09e526.html (69 words)

	Real-Time Rendering Bibliography (Site not responding. Last check: 2007-11-06)
		Catmull, Edwin, "Computer Display of Curved Surfaces," Proceedings of the IEEE Conference on Computer Graphics, Pattern Recognition and Data Structures, Los Angeles, pp.
		Pineda, Juan, "A Parallel Algorithm for Polygon Rasterization," Computer Graphics (SIGGRAPH '88 Proceedings), vol.
		Shene, Ching-Kuang, "Computing the Intersection of a Line and a Cone," in Alan Paeth, ed., Graphics Gems V, AP Professional, Boston, pp.
	www.realtimerendering.com /refs1.html (6901 words)

	List of algorithms (Site not responding. Last check: 2007-11-06)
		Blum Blum Shub: a pseudorandom number generator with a security proof
		Point in polygon: tests whether a given point lies within a given polygon
		Application of quantum computation to various categories of problems and algorithms
	www.brainyencyclopedia.com /encyclopedia/l/li/list_of_algorithms.html (823 words)

	Computer Graphics (Site not responding. Last check: 2007-11-06)
		This applet demonstrates how a polygon is filled using a recursing boundary fill algorithm.
		Click on an interior point of the polygon.
		Click on a boundary point of the polygon to create a hole.
	www.cosc.canterbury.ac.nz /people/mukundan/cogr/Fill.html (50 words)

	Computer Graphics
		translatePolygon(gl, polygon, 4, -400, -450);
		translatePolygon(gl, polygon, 4, -500, 250);
		scalePolygon(gl, polygon, fixedPt, 4, 3.0f, 3.0f);
	csis.pace.edu /~marchese/CG/Lect6/cg_l6_part3.htm (603 words)

	Publications by Title
		Computing the Antipenumbra of an Area Light Source
		Monte Carlo Evaluation of Scattering Functions for Computer Graphics
		Realistic Reflections and Refractions on Graphics Hardware with Hybrid Rendering and Layered Environment Maps
	graphics.stanford.edu /papers/title.html (2421 words)

	Computer Graphics Lecture Notes
		These lecture notes are drawn from material from a variety of sources including texts by Edward Angel; James D. Foley, Andries van Dam, Steven K.
		Feiner, John F. Hughes; Jackie Neider, Tom Davis, Opengl Architecture Review board; Donald Hearn, M. Pauline Baker; and lecture notes by Albert Goodman, and at University of Waterloo, and the University of Toronto's Dynamic Graphics Project.
		Lecture Topic 02 -- Development of Computer Graphics : History pdf pdf one up
	www.cs.kent.edu /~farrell/cg02/lectures (432 words)

	[Exaflop.org] Comp.Graphics.Algorithms FAQ, Contents
		It may be freely redistributed in its entirety provided that this copyright notice is not removed.
		2.01: How do I find the area of a polygon?
		5.06: How do I determine the intersection between a ray and a polygon?
	www.exaflop.org /docs/cgafaq (672 words)

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