Re: [glob2-devel] To Erik: My Profiling Information

[Leo Wandersleb]

Erik Søe Sørensen wrote:
> Here's to hoping :-)
> But, what we need now, then, is any cloud-generator whatever (free to 
> use, preferably fast)?
>
> I must admit that I was a bit disappointed when I saw the clouds turned 
> on... especially given how much they cost :-)  They seem to be just 
> blur, like turning the fertility map on.
> I think this is because only one color tone is used, with varying alpha 
> (is this right?).

:(
yes it is. to get nice structured clouds i guess the only option is to use 
prerendered ones like we had before.

i thought perlin was the answer to get really dynamic clouds and was frustrated 
when i saw how expensive it was. perlin clouds like in your screen shot would 
need a far finer scale of structures.
now we render blocks of 32x32 pixels i guess but still you can see steps some 
times (what is due to some bug maybe).

i did maths so i would have plenty of ideas to make the clouds prettier and more 
structured but it gets too expensive even now.

(a=f(x,y,t), r=g=b=sin(t)*df/dx+cos(t)*df/dy+128 to get clouds lit from a 
wandering sun. as nobody knows how shadows are drawn on a torus with a sun, this 
should maybe not be done using sin/cos ;)

> http://www.daimi.au.dk/~eriksoe/misc/cloud1.png
> http://www.daimi.au.dk/~eriksoe/misc/cloud2-glob2.png

these pix are about what you would get when choosing finer grain perlin noise.

greetings, leo wandersleb