Comments on: Perlin noise generator in PHP

By: Dylan

Dylan — Fri, 23 Jul 2010 06:55:13 +0000

Hmm it seems this doesn’t work. There is minimal randomness produced… try copying/pasting all your own code into it’s own area and see for yourself. I also ported this to javascript and am getting weird results… the noise doesn’t spread over the entire area, but eventually maxes out at -1

By: AquilaX

AquilaX — Sun, 19 Jul 2009 16:39:50 +0000

Derek:
That’s because the loop sizes are
$xl = 100;
$yl = 40;
and the SVG’s dimensions are 400×400px.

Just make both equal.

By: Derek

Derek — Sun, 19 Jul 2009 16:21:17 +0000

I’m sorry but I don’t think this class works. Especially not well enough to generate the image you have displayed. It does some variation near the left side and the rest is always 1 solid color. Even changing the variables to all imaginable combination it still results in the same type of thing.

I’d really love a version that worked but this was posted awhile ago so I doubt I’ll get a response here.

By: AquilaX

AquilaX — Fri, 26 Dec 2008 17:05:23 +0000

Play with $persistence and $octaves variables also $r1, $r2, $r3 gives different result depending on the values.

By: Christian

Christian — Fri, 26 Dec 2008 14:02:00 +0000

I have tried using your class and i get everything in a single color except for some pixels on the top of the image :/

By: AquilaX

AquilaX — Sun, 02 Mar 2008 14:11:24 +0000

You can found sample output here.

By: stelt

stelt — Sun, 02 Mar 2008 13:08:38 +0000

Why not show the actual resulting SVG here? (as opposed to the raster)