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2601:2:4D00:27B:3041:D0ED:47E4:3835: /* References */

2014-11-14T00:56:07Z

References

← Older revision		Revision as of 02:56, 14 November 2014
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	~~{{lead too short\|date=August 2013}}~~		[http://www.wonderhowto.com/search/Historical/ Historical] past of the of the author is definitely Gabrielle Lattimer. For years she's been working due to a library assistant. For a while she's just lately in Massachusetts. As a woman what lindsay really likes is mah jongg but she by no means made a dime to barefoot jogging. She are running and maintaining a blog here: http://prometeu.net<br><br>Feel free to visit my web blog - clash of clans cheats ([http://prometeu.net Read prometeu.net])
	~~{{one source\|date=August 2013}}~~
	~~'''Perlin noise''' is a~~ [[computer graphics\|computer-generated visual effect]] developed by [[Ken Perlin]], who won an [[Academy Award for Technical Achievement]] for inventing it. It can be used to simulate elements from nature, and is especially useful in circumstances where computer memory is limited.

	~~==Uses==~~
	~~[[Image~~:~~Perlin_noise~~.~~jpg\|frame\|Two-dimensional slice through 3D Perlin noise~~.]]
	~~Perlin noise is a [[Procedural_generation\|procedural]] [[Texture (computer graphics)\|texture]] primitive, a type~~ of ~~[[gradient noise]] used by visual effects artists to increase~~ the ~~appearance~~ of ~~realism in [[computer graphics]]. The function has a [[pseudo-random]] appearance, yet all of its visual details are~~ the same size (see image). This property allows it to be readily controllable; multiple scaled copies of Perlin noise can be inserted into mathematical expressions to create a great variety of [[procedural texture]]s. Synthetic textures using Perlin noise are often used in [[computer-generated imagery\|CGI]] to make computer-generated visual elements – such as fire, smoke, or clouds – appear more natural, by imitating the controlled random appearance of textures of nature.

	~~It is also frequently used to generate textures when memory is extremely limited, such as in [[Demo (computer programming)\|demos]], and~~ is ~~increasingly finding use in [[graphics processing unit]]s for [[real-time graphics]] in [[computer game]]s~~.

	~~==Development==~~
	~~Perlin noise resulted from the work of [[Ken Perlin]], who developed it at [[Mathematical Applications Group, Inc.]] (MAGI) for [[Disney]]~~'s [[computer animated]] [[sci-fi]] motion picture ''[[Tron]]'' (1982). In 1997, he won an [[Academy Award for Technical Achievement]] from the [[Academy of Motion Picture Arts and Sciences]] for this contribution to ~~CGI.<ref>Kerman, Phillip. ''Macromedia Flash 8 @work: Projects and Techniques to Get the Job Done.'' Sams Publishing. 2006. ISBN 9780672328282.</ref>~~

	~~==Algorithm==~~
	~~[[Image:Perlin.png\|thumb\|128px\|Perlin noise rescaled and added into itself to create [[fractal noise]].]]~~
	~~Perlin noise is most commonly implemented as~~ a ~~two-, three- or four-dimensional [[function (mathematics)\|function]], but can be defined for any number of dimensions~~.

	~~Define an ''n''-dimensional grid. Each grid coordinate stores~~ a ~~gradient of unit length in~~ '~~'n'' dimensions. To sample, determine which grid cell you're~~ in~~, and then compute the ''n''-dimensional vectors from the sample location to each grid coordinate of the cell~~. ~~For each grid coordinate, calculate the [[dot product]]s of the corresponding distance and gradient vectors. Finally, interpolate these dot products using~~ a ~~function that has zero first derivative (and possibly also second derivative) at both endpoints.~~

	~~In 2001, [[Ken Perlin]] created [[simplex noise]], which~~ is ~~similar~~ but ~~uses~~ a ~~simpler space-filling grid, alleviating some problems with Perlin "classic noise", among them, computational complexity~~.

	~~==Complexity==~~
	~~When <math>n<~~/~~math> is the number of dimensions, Perlin noise has complexity <math>O(2^n)<~~/~~math>, while simplex noise has complexity~~ <~~math~~>~~O(n^2)~~<~~/math~~>.

	~~==See also==~~
	* [[Value noise]]
	* [[Fractal landscape]]
	* [[Simplex noise]]
	* [[Simulation noise]]
	* [[Wavelet noise]]
	* [[Worley noise]]
	* [[Gradient noise]]

	~~== References ==~~
	~~{{reflist}}~~

	~~==External links==~~
	* [http://www.noisemachine.com/talk1/ Making Noise] Ken Perlin talk on noise.
	* [http://mrl.nyu.edu/~perlin/doc/oscar.html#noise Original source code] of ~~Ken Perlin's 'coherent noise function'~~
	* [http://~~webstaff~~.~~itn~~.~~liu.se/~stegu/TNM022-2005/perlinnoiselinks/perlin-noise-math-faq.html Matt Zucker's Perlin noise math FAQ ]~~
	* [http://www.ddj.com/architect/222600097?pgno=4 Rob Farber's tutorial demonstrating Perlin noise generation and visualization on CUDA-enabled graphics processors]
	* [http://www.xna-connection.com/post/Algorithme-de-Perlin-Noise-en-C French tutorial about implementing improved Perlin Noise in C#]

	~~[[Category:Noise]]~~
	~~[[Category:Special effects]]~~
	~~[[Category:Fractals]]~~
	~~[[Category:Computer graphics]~~]

en>Mark viking: Added wl

2013-09-06T06:07:14Z

Added wl

← Older revision		Revision as of 08:07, 6 September 2013
Line 1:		Line 1:
	Specifically in the ugg boots interface. Use boots at the bottom portion of the much larger reinforcement performed! Boots at the bottom to incorporate a sponge with non-slip design. So thatugg cardy light-weight boots. Durable and non-slip.. Lessen the stress on the toes! ugg tall UGG soles have 'R' symbol and the registration of the mark must be ugg boots. On the higher cheap ugg boots See vamps.. UGG vamps actually very brilliant and cleanse.. Every single line is car Inch nine-pin.. Margins are uniform. Higher lines are essentially the exact same sewing machine.. Line moderately elastic. There will be no floating line. Disconnected. Jumper. In very very good all round upper hand.. There is no dilemma of the breakdown.. Ruined. and boots are also reinforcing convergence.. Heel sneakers traditional style of ugg boots heels in Business logos (ugg trademugg typical tallark) slippers, footwear, dwelling machines to print logos are the skin on the footwear.. Material uppers.. Explained pro Ugg boots purchased outside the sense ah uppers. This phenomenon is thanks to the vendor utilizing a suede leather coat wool posing together, as we all know great leather-based is very sugg vintage talloft and delicate experience smoothugg boots as a superior leather-based products are used in sheep'~~s clothing output, and lots of sellers to explain to clients~~ is ~~Sizing is like, how can~~ a ~~person, then the pores and skin is anticipated to be light, then the pursuit of tough-form shoes sense tall and straight out the price of the extremely~~-~~special UGG comfort~~, ~~I am certain you know all about the items pro-certainly did not want to settle~~ for~~. ugg boots united kingdom Best precedence.. On wool Low cost Ugg Boots Canada Crucial explanation~~ for ~~this is the rate of ugg boots in accordance with the origin and high-quality of hair to set. New Zealand or Australia if~~ it ~~is nearby wool~~. ~~Feels resilient. Seem very carefully~~ to ~~see the roots of the wool. Each individual root hair is like a smaller spring-like bend extremely far very modest. So heat. Permeability. Nonetheless~~, the deformation is not simple to pressure. I have bought a pair of the most costly.. Is the pair of maps. Each individual two years, ah. Despite the fact that reasonably compact because my ft.. Drag a frequent walk (#(... Khan), after extreme use to the soles replaced shoe retail outlet at the conclusion of a tricky, ugg boots, but nevertheless truly feel pretty comfortable. There has never ever been gross deformation. Shoes at the bottom of a layer of wool mugg cardy bootsat.. Thick layer of soft, light is a form of satisfaction. Ha ha ~ summer in compact vest to have on quick skirts, bare pursuing a pair of ugg boots! Ha ha ~ to a friend's household taking part in sneakers.. Ft will not stink.. Dry and ~~at ease. within the boots~~ is incredibly neat. Size of uniform. density. Pretty soft and at ease experience. Gentle very snug. Following the crucial detail is to wear lightugg classicweight come to feel, there is no sense of excess weight. Rather warm. ugg tall ugg boots Sequence MOU items shop owner, as properly as all of Australia is totally a single full coat of wool materials (that is linked to skin, with no chopping!!! )#) Is not sold in the outer surface of leather and the within with adhesive created of wool scattered!!! There are presently cortex with the edition tag, it appeared as if he is verycheap ugg cardy boots casual. Comprehend that this is some of the illegal company superfluous! Given that. UGG boots first gugg vintage cardyoods is not with the tag. Can. These tags are types the place? Is the range of businesses to allow for their items to the inadequate is to increase seats and a failure!!! In truth, the causes for their fabrication is straightforward.. Because the prerequisites of domestic goods is marked full three. LV since it was on the Trade and Business has been great.. Worried about the brand name of pro-remember that it must be.. ugg cardy Wool will be a few of the finest Merino (Merino sheep). Is a sort of high-quality wool, from Spain, are now made in Australia for the greatest. Not only potent absorption. Can verify smoking. And very light-weight Sense a lot more gentle and flexible. Foot could phase on the carpet. cardy boots In lots of of Australia's Ugg Bailey Button Triplet.~~<br><br>~~		{{lead too short\|date=August 2013}}
			{{one source\|date=August 2013}}
			'''Perlin noise''' is a [[computer graphics\|computer-generated visual effect]] developed by [[Ken Perlin]], who won an [[Academy Award for Technical Achievement]] for inventing it. It can be used to simulate elements from nature, and is especially useful in circumstances where computer memory is limited.

	~~Should you loved~~ this ~~informative article~~ and you ~~would love~~ to ~~receive more information concerning~~ [http://~~tinyurl~~.com/~~k7shbtq ugg outlet~~] ~~assure visit our own website~~.		==Uses==
			[[Image:Perlin_noise.jpg\|frame\|Two-dimensional slice through 3D Perlin noise.]]
			Perlin noise is a [[Procedural_generation\|procedural]] [[Texture (computer graphics)\|texture]] primitive, a type of [[gradient noise]] used by visual effects artists to increase the appearance of realism in [[computer graphics]]. The function has a [[pseudo-random]] appearance, yet all of its visual details are the same size (see image). This property allows it to be readily controllable; multiple scaled copies of Perlin noise can be inserted into mathematical expressions to create a great variety of [[procedural texture]]s. Synthetic textures using Perlin noise are often used in [[computer-generated imagery\|CGI]] to make computer-generated visual elements – such as fire, smoke, or clouds – appear more natural, by imitating the controlled random appearance of textures of nature.

			It is also frequently used to generate textures when memory is extremely limited, such as in [[Demo (computer programming)\|demos]], and is increasingly finding use in [[graphics processing unit]]s for [[real-time graphics]] in [[computer game]]s.

			==Development==
			Perlin noise resulted from the work of [[Ken Perlin]], who developed it at [[Mathematical Applications Group, Inc.]] (MAGI) for [[Disney]]'s [[computer animated]] [[sci-fi]] motion picture ''[[Tron]]'' (1982). In 1997, he won an [[Academy Award for Technical Achievement]] from the [[Academy of Motion Picture Arts and Sciences]] for this contribution to CGI.<ref>Kerman, Phillip. ''Macromedia Flash 8 @work: Projects and Techniques to Get the Job Done.'' Sams Publishing. 2006. ISBN 9780672328282.</ref>

			==Algorithm==
			[[Image:Perlin.png\|thumb\|128px\|Perlin noise rescaled and added into itself to create [[fractal noise]].]]
			Perlin noise is most commonly implemented as a two-, three- or four-dimensional [[function (mathematics)\|function]], but can be defined for any number of dimensions.

			Define an ''n''-dimensional grid. Each grid coordinate stores a gradient of unit length in ''n'' dimensions. To sample, determine which grid cell you're in, and then compute the ''n''-dimensional vectors from the sample location to each grid coordinate of the cell. For each grid coordinate, calculate the [[dot product]]s of the corresponding distance and gradient vectors. Finally, interpolate these dot products using a function that has zero first derivative (and possibly also second derivative) at both endpoints.

			In 2001, [[Ken Perlin]] created [[simplex noise]], which is similar but uses a simpler space-filling grid, alleviating some problems with Perlin "classic noise", among them, computational complexity.

			==Complexity==
			When <math>n</math> is the number of dimensions, Perlin noise has complexity <math>O(2^n)</math>, while simplex noise has complexity <math>O(n^2)</math>.

			==See also==
			* [[Value noise]]
			* [[Fractal landscape]]
			* [[Simplex noise]]
			* [[Simulation noise]]
			* [[Wavelet noise]]
			* [[Worley noise]]
			* [[Gradient noise]]

			== References ==
			{{reflist}}

			==External links==
			* [http://www.noisemachine.com/talk1/ Making Noise] Ken Perlin talk on noise.
			* [http://mrl.nyu.edu/~perlin/doc/oscar.html#noise Original source code] of Ken Perlin's 'coherent noise function'
			* [http://webstaff.itn.liu.se/~stegu/TNM022-2005/perlinnoiselinks/perlin-noise-math-faq.html Matt Zucker's Perlin noise math FAQ ]
			* [http://www.ddj.com/architect/222600097?pgno=4 Rob Farber's tutorial demonstrating Perlin noise generation and visualization on CUDA-enabled graphics processors]
			* [http://www.xna-connection.com/post/Algorithme-de-Perlin-Noise-en-C French tutorial about implementing improved Perlin Noise in C#]

			[[Category:Noise]]
			[[Category:Special effects]]
			[[Category:Fractals]]
			[[Category:Computer graphics]]

en>Dcirovic: /* References */

2012-06-01T18:25:20Z

References

New page

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