[Bf-committers] development of conditional pass-thru node for compositor

[Xavier Thomas]

Also, if you want anti-aliasing to work on setup like this, you should
set "Full Sample Anti-Aliasing" ON.

2011/4/20 Xavier Thomas <xavier.thomas.1980 at gmail.com>:
> hi Pete,
>
> I thought you might be interested in a fast and easy way to do this
> with blender nodes:
> http://www.pasteall.org/pic/11274
>
> 2011/4/20 pete larabell <xgl.asyliax at gmail.com>:
>> indeed, certainly not saying it has to go into blender :)
>>
>> Just wanted an easy and fast way to get overlapping parts of alphas
>> and such for an experiment. thought someone could find it interesting.
>> Perhaps I'm not familiar enough with the other nodes, but i didn't see
>> a really simple way to do all the tests i wanted to be able to do.
>>
>> On Wed, Apr 20, 2011 at 1:29 PM, Xavier Thomas
>> <xavier.thomas.1980 at gmail.com> wrote:
>>> Hi Pete,
>>>
>>> In fact the math node (in the convertor category) does something similar.
>>> It does not have the "pass if true" and "pass if false" socket but
>>> it's output can be used as mask to achieve the same result.
>>>
>>> I personally think your node is redundant, maybe more effective in
>>> terms of performances but also less flexible.
>>>
>>> It is a pity that we cannot do nodes plugins in C so that one can
>>> distribute some specialized node, because bloating the sets of
>>> defaults nodes (provided with Blender by default) is not really an
>>> option too, it will confuse user too much.
>>>
>>> Xavier
>>>
>>> 2011/4/20 pete larabell <xgl.asyliax at gmail.com>:
>>>> not quite sure where this will end up, but it's working in it's
>>>> current form, thought i'd share a quick render
>>>>
>>>> http://www.pasteall.org/pic/11269
>>>>
>>>> basic idea is:
>>>>
>>>> if(op1.pixel **TEST_HERE** op2.pixel){
>>>>    out.pixel = pass_if_true.pixel;    //the 3rd input
>>>> }else{
>>>>    out.pixel = pass_if_false.pixel;   // the 4th input
>>>> }
>>>>
>>>> obviously that's pseudo-code. :)
>>>>
>>>> current tests available are ==, !=, >, <, >=, <=
>>>>
>>>> plan to allow full RGBA sockets for at least the bottom 2 inputs and
>>>> output socket.
>>>>
>>>> Cheers!
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