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Topic: Raytracing

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	flipcode - Raytracing Topics & Techniques
		Many raytracers use a simpler approach: Each material is assigned a 'reflectance' variable, which is multiplied with the color that the reflected ray returns, and a 'refractance', which is multiplied with the color that a refracted ray returns.
		Perhaps you noticed that the raytracer returns a pointer to a primitive: This is the primitive that was hit by the primary ray.
		The raytrace method as it is now returns a pointer to a primitive, but you could also choose to return some other number, based on the primitive pointer, combined with reflected primitives and the number of visible lights.
	www.flipcode.com /articles/article_raytrace03.shtml (1875 words)

	flipcode - Raytracing Topics & Techniques
		Raytracing is basically an attempt to imitate nature: The colors that you see are rays of light cast by the sun (probably), bouncing around the detailed scenery of nature, and finally hitting your eye.
		Those rays are the reason that a raytracer does not trace rays from a light source to a camera, but vice versa.
		In the sample raytracer, it's centered at the origin, it's 8 world units wide and 6 world units high, which fits nicely for a 800x600 screen resolution.
	www.flipcode.com /articles/article_raytrace01.shtml (1617 words)

	Ray Tracing
		A fundamental task in raytracing is determining where a ray intersects an object, this is usually the most expensive step so it is important that intersections be found as efficiently as possible.
		A simple raytracer assumes that traced rays are infinitely thin beams, this results in images with sharp shadows, sharp reflection and refraction, with everything in perfect focus.
		To achieve depth of field effects in raytracing, we must specify a focal plane, which is a plane parallel to the viewplane, this plane will be the centre of the required depth of field.
	glasnost.itcarlow.ie /~powerk/Graphics/Notes/node12.html (2996 words)

	bit-tech.net \| Raytracing in games not so far off
		Raytracing is something that many of the 3d and modeling afficionados will be intimately familiar with.
		Intel has been devoting lots of time lately to the advancement of raytracing, and has released a paper showing that the technology really isn't too far off from being real-time.
		Unlike raster graphics, raytracing scales linearly with the number of cores devoted to it...so as we're looking at the upcoming Kentsfield processors, things are about to get interesting.
	www.bit-tech.net /news/2006/08/07/Raytracing_in_games_not_so_far_off (392 words)

	Raytracing - Wikipedia
		Raytracing wurde seit seiner ersten Verwendung in der Computergrafik jedoch mehrmals wesentlich erweitert.
		Raytracing lässt sich nicht nur auf einfache lichtundurchlässige, sondern auch auf durchsichtige und spiegelnde, reflektierende Objekte anwenden.
		In Bereichen wie der Virtuellen Realität, in der räumliche Darstellungen in Echtzeit berechnet werden müssen, konnte sich Raytracing bisher nicht durchsetzen.
	de.wikipedia.org /wiki/Raytracing (3663 words)

	What is Raytracing? (Site not responding. Last check: 2007-10-13)
		In the very simplest terms, raytracing is a method for producing views of a virtual 3-dimensional scene on a computer.
		Raytracing is closely allied to, and is an extension of, ray-casting, a common hidden-surface removal method.
		A raytracing program calculates the illumination effects of a surface by tracking, or tracing, the path of a light ray as it bounces off or is refracted through the surface.
	fuzzyphoton.tripod.com /whatisrt.htm (1830 words)

	Starosta Information on Raytracing (Site not responding. Last check: 2007-10-13)
		After the computer has traced the path of the ray through the entire scene, adding up all of the interactions that the ray had with objects in the scene, it can determine the color and value of the pixel in the field of view corresponding to that ray.
		A few things that cannot be rendered even with raytracing: Although a light source can be seen in the reflection on an object (like a mirror, say), light is not actually reflected - that is, you cannot use mirrors in a scene to actually redirect illumination in the scene.
		Raytracing all by itself cannot render depth of field, the blurriness of objects beyond the focus of the eye.
	www.starosta.com /raytracing.html (432 words)

	Ray tracing - Wikipedia, the free encyclopedia
		Scenes in raytracing are described mathematically, usually by a programmer, or by a visual artist using intermediary tools.
		After a stipulated number of maximum reflections has occurred, the light intensity of the point of last intersection is computed using a number of algorithms, which may include the classic rendering algorithm, and may perhaps incorporate other techniques such as radiosity.
		A simple version of ray tracing known as ray transfer matrix analysis is often used in the design of optical resonators used in lasers.
	en.wikipedia.org /wiki/Raytracing (2759 words)

	Xedium3d - Tutorials - Raytracing
		Raytracing is used to create shiny reflective surfaces, like a mirror or a metal ball, or see-through objects that refract light.
		For every pixel on the screen that shows a raytraced object, the renderer will shoot one ray (unless you use anti-aliasing or defocusing).
		Hopefully, after reading through this, you have a better idea of how raytracing works, and how to use it in newer and better ways.
	www.xedium3d.com /tutorials/raytracing/raytracing.html (344 words)

	bit-tech.net \| Parallel Worlds
		And then Intel's little report on raytracing hopped across my desk like a little white rabbit with a pocketwatch, and I followed it right down into the rabbit hole.
		Research has been slow in raytracing, whereas raster graphic research has continued to be milked for every approximate drop it closely resembles being worth.
		And because of the way that raytracing only repeats one big equation over and over, it means no need for 64 gazillion pixel pipes and shaders - unless, of course, those pipes can do a lot more than one purpose.
	www.bit-tech.net /columns/2006/08/27/parallel_worlds/1.html (1315 words)

	Realtime raytracing chipset? - Beyond3D Forum
		Raytracing makes the claim that it can operate in logarithmic time with spacial acceleration, while rasterization would be linear.
		When raytracing, the entire scene must be available because without prior knowledge of the object's surface, a reflected ray could go anywhere.
		I'm not saying that hardware raytracing won't be possible, but my guess is that it'll take at least another 10 years to be useful.
	www.beyond3d.com /forum/showthread.php?t=18188 (1462 words)

	Raytracing \| Forward Raytracing \| Backwards Raytracing \| Distributed Raytracing \| Stochastic Raytracing
		This can happen with the help of an ambient term, which represents an (unrealistic) global brightness of the scene, by determining the distance to one or several light sources, or recursively by sending more rays into the scene from that point on.
		A combination of the last two methods, called distributed raytracing, is the most interesting one for our purposes.
		Distributed raytracing can simulate scenes of extreme complexity quite effectively, while for scenes with very high numbers of light sources the radiosity approach often has some advantages.
	www.schorsch.com /kbase/glossary/raytracing.html (221 words)

	Christoph's page - Raytracing
		Raytracing which makes it possible to generate realistic high quality images of imaginary objects and scenes.
		The raytracing introduction i wrote will help you to understand how the images are actually generated in case you are not familiar with this.
		Persistence of Vision Raytracer is the program i use for most of my images and i also help developing.
	www.imagico.de /raytracing.html (233 words)

	[No title]
		Raytracing and radiosity tend to produce much higher-quality images than those seen in real-time environment such as OpenGL.
		However, that quality tends to require a great deal more processing power, so normally raytracers are not real-time renderers.
		Raytracer with what looks like a fairly extensive Python binding (with some limitations on the type of extending you can do with Python).
	www.vrplumber.com /py3d.py?category=raytrace (207 words)

	Raytracing in Photoshop
		And both advocates and antagonists agree that raytracing is often very slow and CPU-intensive, for even the most advanced and optimized raytracing programs.
		Raytracing effects have worked their way firmly into the iconography of computer picture-making, and so we often expect to see it.
		Simulating raytraced refraction effects is in some way easier than just raytracing them.
	www.botzilla.com /house/RayPS.html (2112 words)

	BBC - h2g2 - Raytracing
		Raytracing is a method of creating life-like scenes in computer graphics.
		It is a way of generating near photo-realistic pictures from a series of commands in a text file.
		Raytracing is not much use for computer games, because it can take several minutes to create a single image.
	www.bbc.co.uk /dna/h2g2/A220311 (264 words)

	Raytracing (Site not responding. Last check: 2007-10-13)
		After a while, I learned about Povray, a freeware raytracer that was used by most people.
		I started a monthly raytracing competition that got way bigger than I had expected, which led me to hand it off to people with more time and desire to make it big.
		A CD-ROM has been released with the contents of the first year of this new competition, which is well worth buying.
	www.mattkruse.com /raytracing (267 words)

	The Realtime Raytracing Realm
		Among the many graphical effects and techniques, raytracing is especially suited to the traditional 64k size format, and since Mfx released Transgression in late 1995 a few more raytracing intros have been a part of various programming competitions.
		The most common realtime raytraced objects we've seen are definitely quadrics, but recently also quartics have been used.
		Raytracing intros can be sometimes disturbing, because of the huge size of filtered pixels (and usually also for that swell north-european techno music, provided you own a Gravis Ultrasound soundcard, for years the standard in demos), but some of them are real technical masterpieces, keeping alive the myth of hacking so misunderstood nowadays.
	www.acm.org /tog/resources/RTNews/demos/overview.htm (454 words)

	Ideas for Raytracing
		A problem of making raytracing images using numerical geodesics is that raytracing requires to go backwards in time.
		For raytracing, an observer's position is given in space and time and the view direction (towards the screen pixel looked at).
		Another idea is to do raytracing not in spacetime but statically within a single time slice.
	www.aei-potsdam.mpg.de /~werner/ideas/raytracing (616 words)

	Photon Engineering - FRED - Raytracing
		Non-sequential raytracing is extremely useful in such applications as illumination systems where rays may intersect a reflector or integrator several times before reaching, for example, the digital mirror device (DMD).
		It is also useful in fiber optic and telecommunication applications where the rays may experience thousands of reflections as they propagate.
		Non-sequential raytracing is also a valuable check in sequential systems to verify that there are no unintended “leakage” paths or blocked paths in the system.
	www.photonengr.com /fred/raytracing.html (206 words)

	Why Raytracing (Site not responding. Last check: 2007-10-13)
		Another raytrace effect is the combination of reflection and refraction, as in glass.
		The solution for fast raytracing is a real hardware capable of raytracing.
		It is clocked with 90 MHz and has the raytrace power similiar to a virtual P4-12 GHz.
	graphics.cs.uni-sb.de /~sidapohl/egoshooter/why.html (434 words)

	My Humble Graphics Page: Raytracing; What, Why and How. (Site not responding. Last check: 2007-10-13)
		A Gentle Introduction to the Art and Science of Raytracing, with Vendela in the shower.
		The shower is an apt metaphore for raytracing...
		Two grids are used to help the artist render an acurrate perspective drawing of the model using raytracing techniques.
	www.frontiernet.net /~imaging/rt_how.html (94 words)

	Raytracing & Imaging -- An interactive Java Applet --
		With this applet you can generate all 6 of the Quadric Surfaces, and the cylinder, and you can do all that in about a minute once the applet is loaded if you're using a typical 100 M Hz machine.
		In the next few weeks I will be implementing an illumination model and will allow you to specify more of the parameters, and coming really soon: raytracing the planet earth, viewed from any perspective and time of day.
		If you want to see what it looks like on my machine click here.
	www.frontiernet.net /~imaging/raytracing.html (588 words)

	rune\|vision - Raytracing Jokes
		Even though you've explained raytracing to them, your family doesn't really understand what you're talking about, and they wonder why you won't just admit you took those pictures with a camera.
		Your wife's raytraced image you made to flatter her is the only one you see of her anymore.
		You loudly deride someone else's interpretation of a raytraced scene, despite the fact that his wrists are way thicker than your biceps.
	runevision.com /misc/jokes (5131 words)

	Raytracing (Site not responding. Last check: 2007-10-13)
		Raytracing is a very cool image rendering technique which 1) wastes a lot of CPU cycles, and 2) produces very realistic images.
		And the license has all sorts of silly limitations (price for which you may sell copies of the program, etc.).
		Fortunately, I have found a very, very cool raytracer that is released under the
	www.nuclecu.unam.mx /~federico/rt (405 words)

	Christoph's page - Raytracing and POV-Ray - an introduction
		Raytracing and POV-Ray - an introduction for newbies (
		Raytracing and POV-Ray - an introduction to POV-Ray (
		From the feedback i got concerning this website i have the impression that for people not so familiar with the techniques of computer graphics it is sometimes difficult to imagine how the images shown here are made.
	www.imagico.de /pov/ray_tutorial.html (224 words)

	Christoph's page - Raytracing Gallery
		Most of the images shown here are as they come from the raytracer, without manual modifications in an imaging program.
		IRTC (Internet Raytracing Competition) is a contest for computer generated images.
		It is open to all skill levels and all kind of rendering software and every submission period has a certain topic.
	www.imagico.de /pov/gallery.html (91 words)

	DevMaster.net - Raytracing: Theory & Implementation Part 1, Introduction
		DevMaster.net - Raytracing: Theory and Implementation Part 1, Introduction
		But it starts with a list of benefits of raytracing over rasterization-based algorithms.
		At the bottom of this article you'll find a link to a file containing a small raytracer project (VC6.0 project files included).
	www.devmaster.net /articles/raytracing_series/part1.php (1535 words)

	Raytracing (Site not responding. Last check: 2007-10-13)
		I use raytracing as a way to relax with my computer.
		I use the Persistence of Vision Raytracer (POVRay) for all of my raytracing.
		I composed all of these raytraced images by hand with a text editor, because I have yet to find a 3D-modeller that I like.
	www.ivory.org /raytrace/index.html (165 words)

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