what is SetXY used for?

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On 16/07/2007 at 14:54, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   9.6 
Platform:   Windows  ; Mac  ;  Mac OSX  ; 
Language(s) :     C++  ;

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Hi there,

I would like to know what the SetXY command in VolumeData is actually used for? I mean what´s the purpose of this command?

Can I use it during rendering? What would the effect of such a call in CalcVolumetric for example be? Or is it used for AntiAliasing purposes?

ANY information is useful
Thank you
Samir

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 17/07/2007 at 05:57, xxxxxxxx wrote:

certain shaders can evaluate the screen-pixel position. applications like the baker can control this parameter without rendering an image.

cheers,
Matthias

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 17/07/2007 at 06:22, xxxxxxxx wrote:

Ah, first of all thanks Matthias. But I still don´t fully understand I´m afraid. What functions in VolumeData require SetXY to be used before evaluation?

Could you give me a very simple example?

The problem of understanding I have is, why can´t Baker simply use a for loop and then evaluate what it needs to evaluate?

For example:

for(x;x<xres;x++)
for(y;y<yres;y++)
{
   ...Do something at that screen-pixel position or use GetRay(x,y,ray)...
}

Thanks!

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 20/07/2007 at 02:48, xxxxxxxx wrote:

Any further info on this? I would like to precalculate something in my InitRender in Screen pixel position, but would like to know if it´s necessary to use SetXY (is it safe to fill the passed VolumeData in InitRender with SetXY?) or if I can simply use a loop as I stated?

My tests say that it works as expected but maybe SetXY offers some advantages over the loop solution?

thanks