Re: [glob2-devel] New clouds

[Erik Søe Sørensen]

Kieran P skrev:

> This way, if you pull master you get bug fixed code, if you pull 
> optimized, you get bug fixed code with new features.

Right. This is the case now; it's just a question of merging in master 
changes regularly.

> Anyway, done profiling. Results at:
>
> http://dl.sv.nongnu.org/releases/glob2/profiling.tar.bz2
>
> Looks like the two functions it used to call (perlin noise and cloud 
> compute (or something like that)), are now just one function (simplex 
> noise) with about 6% less cpu used??

Well, DynamicClouds::compute() is still there, so the (absolute) savings 
seems to be down at 3%.
But on the other hand, cloud computation is done about 50% more times - 
which probably means a 50% increase in the framerate?
Anyway, not 6x speed according to these measurements, but still 
something :-)

The gains of eliminating floating point operations are somewhat machine 
dependent...

(Fwiw, my measurements are based on a program running both the old and 
new version at the same time, to ease comparison.)

/Erik