[PD] how to change the color of backgound...

Jose Luis Santorcuato santorcuato76 at gmail.com
Wed May 13 19:35:32 CEST 2009


Well.... Dear Friends... i cant change de colours of Gem Windows i dont try
with the new comment... but this afternoon i will try...

Very thanks from Chile

José

2009/5/13 IOhannes m zmoelnig <zmoelnig at iem.at>

> Jaime Oliver wrote:
>
>> so each rendering chain starts with a gemhead, each of them have an
>> argument. the bigger the argument then it is rendered later.
>>
>> so that:
>>
>> gemhead 1
>>
>> is rendered after
>>
>> gemhead 0
>>
>
> hmm, while your explanation is right, your example is wrong.
>
>
> [gemhead 2] will be rendered after [gemhead 1].
> [gemhead 0] is equivalent to [gemhead] (without args), which actually
> translates to [gemhead 50].
>
> the reason for this is to be able to easily insert [gemhead]s that are
> rendered _before_ the "default" gemhead (and _after_ as well).
>
> of course, in theory the [gemhead] could check whether there are no
> arguments and handle this differently than when an argument "0" is present.
> but currently it doesn't do so.
>
>
> everything written here is by heart, so i might be mistaken :-)
>
> nevertheless, i would suggest to never use a rendering order of "0", as it
> is a borderline case.
>
>
>> I don't know how many levels you can get although i usually see people
>> write 0-99...
>>
>
> the render-order is represented as floating point.
> so 47.7 will be rendered after 47.69; and 2e-9 will be renderend before 1e8
> for all practical purposes, this should give you an "infinite" number of
> levels.
>
>
> the important thing to notice is that negative render-orders are treated
> somewhat differently:
> - first of all they are always rendered _after_ positive orders. (that is:
> -1 will be rendered on top of 1000)
> - negative render-orders will not be affected by view-point messages
> (both of the above are like that to enable simple OSD overlays)
>
> - iirc, negative orders are somehow reversed: that is "-2" is rendered
> after "-1" (even though -2 is smaller than -1)
>
>
>
> mfg.asdr
> IOhannes
>



-- 
http://arselectronicachile.blogspot.com/
www.myspace.com/santorcuato
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