Re: [pygame] circular setion on an array

[Fábio Dias Moreira <fabio.dias@superig.com.br>]

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jabberwocky <azazel_arms@yahoo.it> said:
> If I have an array with all zeros, there is a way to
> change to 1 some positions in order to get a full
> circle drawned by the 1s? or better, having all 1s in
> the array change to 0 the positions out of the
> "circle", in other words I need a way to select
> elliptical section onto an array...
> [...]

You could draw a circle using pygame.draw.circle and pull the array with 
surfarray. If you want something with a higher precision or speed, use 
Numeric.fromfunction, with function with function ((x**2 + y**2 - r**2) < 0).

Since you'll probably want to avoid Python funcalls, you could try playing 
with an array generated by Numeric.indices and the logical operators. It 
*will* be faster, but you probably shouldn't do it unless there's a proven 
bottleneck in your code (use the profiler!).

[]s,

- -- 
Fábio "ctg \pi" Dias Moreira
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