From: Charles Comstock <cc1@...>
Date: 2004-02-03T09:30:08+09:00
Subject: Re: graphics lib?

Simon Strandgaard wrote:
> On Sun, 01 Feb 2004 16:18:50 -0600, Charles Comstock wrote:
> 
> 
>>Simon Strandgaard wrote:
>>
>>>On Sun, 01 Feb 2004 02:12:43 +0900, Alwin Blok wrote:
>>>
>>>
>>>
>>>>Hello,
>>>>
>>>>What would be the best choice for 2d vector graphics with ruby?
>>>>My needs are as follows:
>>>>2D vector (SVG/ pdf/ postscript like), Animation, Offscreen rendering.
>>>
>>>
>>>
>>>I can recommend RMagic.
>>>http://rmagick.rubyforge.org/
>>>
>>>Don't know about animation though.
>>>
>>>
>>>You may see what I have made using RMagick, here:
>>>http://aeditor.rubyforge.org/softwrap.html
>>>
>>>--
>>>Simon Strandgaard
>>
>>I have used RMagic in the past, but it doesn't quite seem suited to per 
>>pixel editing.  I was trying to do an AI project of RedEye detection for 
>>  a class, and I did succeed to use it but I had to add a couple methods 
>>to more easily edit individual pixels.  It just didn't seem to be really 
>>set up to do per pixel calculations or modifications very nicely.  I was 
>>   curious if anyone else has suggestions on what would be most 
>>appropriate for that?
> 
> 
> 
> It's possible with RMagick.. get/set pixel methods  :-)
> http://www.simplesystems.org/RMagick/doc/image.html#Image.get_pixels
> 
> 
> --
> Simon Strandgaard
> 

Right I have used that function it's just very cumbersome, it would be 
much easier to directly edit the values in the real array they are in. 
Exporting a pixel array is really not a very efficient operation, not to 
mention the need to reimport them later.  Not to mention the fact it 
returns a flat array which while it's easy to write an accessor that 
2d's it, it still is not particularly friendly towards doing image analysis.

Charlie