[jitter] Re: Re: cc.uyvy2rgba.jxs and optimization

On Jan 7, 2008, at 3:51 PM, Tyler Nitsch wrote:

>
> hey Joshua looks like the chromasmooth argument is the problem.   
> Probably something to do with the line of code vade posted since  
> when the value is greater than 0.5 the distortion occurs.  The  
> graphics card is ATI's latest(Radeon HD 3870)... I wonder what they  
> changed.  Anywho I hope this helps.  Sorry for not digging into  
> parameter values initially... will do with future problems with  
> shader programs.

Might just be some FP round off errors or some difference with the  
way the texture coordinates are being generated (center to center vs.  
corner to corner etc.). I'd try something like changing  
"coord_frak.x>=0." to "coord_frak.x>0." or "coord_frak.x>=0.5".

I don't have time at the moment to fiddle with this, but if you have  
a chance and discover something that works for your card and others,  
please let us know.

Thanks,
Joshua