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Tch
Account closed
Registered: Sep 2004
Posts: 512 |
Anti-Aliasing
I thought I understood but I am confused again.
What the hell is Anti-aliasing? |
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ChristopherJam
Registered: Aug 2004
Posts: 1378 |
algorithm; I used antialiasing to do sub pixel scrolling in the first part of Effluvium. I needed to be able to scroll the background behind the techtech scroll by one character distance in 8 steps, even though it was multicolour. I just pixelled it by hand, but that was because I wrote that part back around 1990 before I started cross developing; if I did it today I'd probably AA as part of an image converter. |
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algorithm
Registered: May 2002
Posts: 702 |
christopherjam: Lovely zoomer and rotator in that demo.
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Oswald
Registered: Apr 2002
Posts: 5017 |
yeah \o/ CJ: I'd like to see a faster version of that 3d engine at the end of the demo with kewler movements :) |
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ChristopherJam
Registered: Aug 2004
Posts: 1378 |
Thanks Algorithm.
Oswald - yeah, I was in the middle of writing the matrix inversion so I could do a flyby for the last part, but it was getting close to the official deadline, so I thought fuckit I'll actually spend some time socialising with all these mad Europeans instead :). The main place I could try and optimise is the edge clipper - I'm taking around 1000 cycles to find where a 16 bit precision line segment crosses a z-plane...
Watch this space though, I've got a kinda-3d entry coming up for the Game Over(view) Freestyle Game Jam compo (cf http://bovine.artificial-stupidity.net:1202/gameoverview/jam.ht.. ). |
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Radiant
Registered: Sep 2004
Posts: 639 |
CJ: Too bad you couldn't finish your demo for BFP, hope to see something next time. :-) Effluvium rocks! |
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ChristopherJam
Registered: Aug 2004
Posts: 1378 |
Thanks. Got a bit too ambitious this year, but not sure that I'll make it to the Northern Hemisphere in 2007. Should really try and sort out some aussie events - I know there are a few Perth sceners around (Hi guys!) |
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Style
Registered: Jun 2004
Posts: 498 |
Hi Christopher!
:)
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Wildstar
Registered: Nov 2004
Posts: 50 |
Quote: Some good definitions from Wikipedia:
"anti-aliasing is the technique of minimizing aliasing (jagged or blocky patterns) when representing a high-resolution signal at a lower resolution."
"Dithering is a technique used in computer graphics to create the illusion of color depth in images with a limited color palette (color quantization)."
Better definition:
anti-aliasing is applying a technique of minimizing aliasing (jagged or blocky patterns)... stop
To smooth out jagged lines and curves in a picture.
Method of techniques: (follows)
Filling in spaces between jagged areas with colors aproximately half way between foreground object pixel color and background (or background object - object behind the fore object) pixel color. [Or approximating the closet color that matches the blend - subjectively]
Dithering: Is using a technique to smooth shade gradients.
Eg. Think checkerboard-like patterns of shade 1 and shade 2.
Whatever you guys like to describe, the quality of anti-aliasing and dithering is the effect attempting to achieve.
There is also interlace dithering (technique of using image 1 and image 2 and flickering them back and forth to increase the effect of more color but there is a slight displacement between image 1 & 2 by [half-pixel] and it is basically applying the checker pattern when viewing image 1 as odd pixels and image 2 as even pixel of a 640x200 image. Even though at any one time, you really viewing 320x200 pixels. You can use a zero pixel offset and the pixel just over draw on top of each other and you get a flickery mixture.
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Steppe
Registered: Jan 2002
Posts: 1510 |
Just when you thought the place is halfway clean of lowlife nerds, Wildstar comes along and starts educating an already very educated crowd with his mumblings...
Please, stick to the C= newsgroups where everyone has you in his killfile already! |
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null
Account closed
Registered: Jun 2006
Posts: 645 |
I say, fuck Anti-Aliassing. \o/
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Knoeki/DigitalSoundsSystem/GheyMaidInc/SwappersWithAttitude
http://hardwarehacks.untergrund.net/zomgwtfbbq/index.php |
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