what is SetXY used for?



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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

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

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

    ---------
    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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED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


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