it must be a matter of rounding:
I don't know exactly how anti alias operates
http://en.wikipedia.org/wiki/Anti-aliasing
but it changes the color of both object and background
turn it off and see what happens
jjc
Mtl
--- Fabio Soggia <rb at menssana dot to dot it> wrote:
> Thanks, I used your code, but I have some doubts.
>
> I tried x1 = 0, y1 = 0, x2 = 10, y2 = 4
>
> With your code it should be:
>
> 0 0
> 1 0
> 2 0
> 3 1
> 4 1
> 5 2
> 6 2
> 7 2
> 8 3
> 9 3
> 10 4
>
> I tried my initial idea, so a new picture, I draw a
> line and check
> pixel by pixel the color. Using new render (on osx)
> I have antialias
> and so many colours, using old render I have only
> black and white,
> but not same pixels.
>
> 0 0
> 1 1
> 2 1
> 3 1
> 4 2
> 5 2
> 6 3
> 7 3
> 8 3
> 9 4
> 10 4
>
> Code of the test is available, just ask it.
> Any suggestion? Have I to check every line I
> process? Seems I have to
> do it about 2'000'000 times for my project.
> Thanks
> Fabio Soggia
>
> Il giorno 21/dic/05, alle ore 01:21, FreeFL ha
> scritto:
> > ...
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