[reactive] crayon - a 2D opengl curve renderer, with Reactive animations

[Jules Bean]

Tom Poliquin wrote:
> Jules, thanks for uploading the code!

You're most welcome.

> 
> As a reactive newbie, examples are a gigantic help ..
> 
> It works great .. about 40FPS  on my
> ATI Technologies Inc RV515GL [FireGL V3350] 
> using about 3% of my  
> AMD Athlon(tm) 64 X2 Dual Core Processor 6000+
> CPU.

Yes, capped to 40fps by the "25" (25 milliseconds = 1/40 seconds) in 
line 115 inside the idle callback.

If you change that to "0" then it will take up more or less 100% of your 
CPU and framerates will be much higher. On my machine (nvidia m 8xxx) it 
does 1000fps (!) for Pong, 400fps for the charts and 100fps for the flowers.

> 
> I had to make a small change to get it to work on my
> system (perhaps I'm down rev somewhere) .. but I 
> thought I'd share in case other newbies have the same
> issue ..
> 
> crayon.hs:689:57:
>     Constructor `WeightedProperties' should have 4 arguments, but has been 
> given 1
> crayon.hs:699:8:
>     Constructor `WeightedProperties' should have 4 arguments, but has been 
> given 1
> 
> I just changed the WeightedProperties args in each case to,
>  (WeightedProperties (_,p) _ _ _)
> from
>  (WeightedProperties ((_, p) : _)) 

D'OH

That is the correct fix, yes.

I forgot that my HOpenGL bugfix actually changed the API.

Jules