Op 8-3-2023 om 14:59 schreef Mike Miller:
> "Bald Eagle" <cre### [at] netscapenet> wrote:
>> "Mike Miller" <mil### [at] gmailcom> wrote:
>>
>>> The 'populate' macros are slow to process with the amount of objects I'm using.
>>> Not well optimized - could us some type of culling to remove unseen plants.
>>
>> I tried something like this - I determined what the view frustum was, and then
>> IIRC did some my own home-brew insidedness tests.
>>
>>
http://news.povray.org/povray.binaries.images/message/%3Cweb.587ce70b1652a4dcc437ac910%40news.povray.org%3E/#%3Cweb.5
> 87
>> ce70b1652a4dcc437ac910%40news.povray.org%3E
>>
>> - BW
> 
> Thanks BW.
> I like that idea - using the cameras frustum shape for an inside/outside test.
> Using the cameras' hither and yon planes for space partitioning. BSP?
> 

In another age, long, long ago early in this century, Gilles Tran wrote 
a macro doing just that. I have always used it since then. I attach it 
here. I must have a demo scene somewhere too... I shall try to find it 
tomorrow.

Note: The prefix GT_ is a code referring to the original author. It is a 
way I use to remember who wrote the code ;-)

-- 
Thomas

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