POV-Ray : Newsgroups : povray.binaries.images : Ivy Generator : Re: Ivy Generator Server Time
17 May 2021 19:25:19 EDT (-0400)
  Re: Ivy Generator  
From: Thomas de Groot
Date: 29 Apr 2021 02:09:08
Message: <608a4d84$1@news.povray.org>
Op 29/04/2021 om 07:24 schreef brookville:
> "Thomas de Groot" <tDOTdegroot@interDOTnlANOTHERDOTnet> wrote:
>> "hobBIT" <bla### [at] gmxde> schreef in bericht
>> news:4a4f81bd$1@news.povray.org...
>>> At the moment, growing is weighted by 4 factors:
>>> 1. follow direction of last segment
>>> 2. random
>>> 3. gravity
>>> 4. "up",
>>> while the last can be seen as growing towards light. It's easy to add
>>> another weight which grows to a given vector, but growing to "light" can
>>> be very complex, depending on scene complexity, maybe a path can help out
>>> to accomplish this.
>>>
>>> The starting point and primary growing direction are input parameters.
>>>
>>> I think about a total replace of the current growing algo, as it always
>>> clamps to any object, so hanging ivy is not really possible atm.
>>>
>>
>> "up" is probably enough for most  outdoor cases as "light" can be
>> interpreted as the sun but also as the bright sky. Growing indoors however,
>> would need a vector, representing a window for instance, or several vectors
>> for several vectors, where a "brightness" parameter would additionally bias
>> the growth more or less.
>>
>> Hanging ivy should be implemented indeed as this happens in real life as
>> soon as the branches overtop their support.
>>
>> Thomas
> 
> the macro works great - several csg objects here - not done yet but the ivy
> definitely adds to it - thanks!
> 

I am not the builder, only same first name. ;-) But it is a very fine 
modeller, and useful.

For those who do not remember what all this was about:
http://graphics.uni-konstanz.de/~luft/ivy_generator/

-- 
Thomas


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