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Difference between revisions of "Glossary:Anti-aliasing (AA)"

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==General==
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Antialiasing (short AA) is a computer graphics technique that attempts to minimize the unwanted "staircase" effects which occur due to the limited resolution in 3D-Renderers. They also increase the texture quality in some cases.<br />
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There are a number of Antialiasing-techniques today but all of them are based on the same principle. They simply render multiple pixels per pixel of the final image.<br />
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The techniques only differ on two faktors :
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* How they determine which pixels are aliased.
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* How they "mix" the multiple rendered pixels to get the final pixel.
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These algorithims are also variable on how many pixels they use to determine one final pixel. In video games this is represent by a simple number which is a power of 2 like 2x,4x,8x and so forth.
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'''Comparison'''
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{| class="wikitable"
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|-
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! No Antialiasing!! 16x Antialiasing
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|-
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| [[File:Not_antialiased_Cube.png‎|miniatur‎]] || [[File:Antialiased_Cube.png]]
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|}
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==In video games==
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Antialiasing improves the general graphics quality but lowers the frame rate quiet significant. Lowering or diabiling the AA effect is a good way to improve the overall framerate.
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An antialiasing-setting is present in most PC games. If its not available in a specific title, it is usually possible to force it via the graphics card driver or a mod/hack.
  
Antialiasing is a computer graphics technique that attempts to smooth out lines in polygonal images so they appear less jagged. The option to apply antialiasing is present is almost every PC game on the market today. In most cases, the options exists to apply Antialiasing in levels like 2x, 4x, 8x, and occasionally 16x. This is the number of passes the AA algorithim makes on the current frame, and a higher number can impart noticeable performance slowdown. If you are experiencing low FPS, lowering or diabiling the AA setting is a great way to increase performance.
 
  
  
 
[[Category:Guide]]
 
[[Category:Guide]]
 
[[Category:Graphics]]
 
[[Category:Graphics]]

Revision as of 19:06, 18 March 2012

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General

Antialiasing (short AA) is a computer graphics technique that attempts to minimize the unwanted "staircase" effects which occur due to the limited resolution in 3D-Renderers. They also increase the texture quality in some cases.
There are a number of Antialiasing-techniques today but all of them are based on the same principle. They simply render multiple pixels per pixel of the final image.
The techniques only differ on two faktors :

  • How they determine which pixels are aliased.
  • How they "mix" the multiple rendered pixels to get the final pixel.

These algorithims are also variable on how many pixels they use to determine one final pixel. In video games this is represent by a simple number which is a power of 2 like 2x,4x,8x and so forth.

Comparison

No Antialiasing 16x Antialiasing
miniatur‎ Antialiased Cube.png

In video games

Antialiasing improves the general graphics quality but lowers the frame rate quiet significant. Lowering or diabiling the AA effect is a good way to improve the overall framerate.

An antialiasing-setting is present in most PC games. If its not available in a specific title, it is usually possible to force it via the graphics card driver or a mod/hack.