POV-Ray : Newsgroups : povray.advanced-users : Need a script to randomly scatter objects vertically : Re: Need a script to randomly scatter objects vertically Server Time
25 Jul 2021 07:39:25 EDT (-0400)
  Re: Need a script to randomly scatter objects vertically  
From: Norbert Kern
Date: 21 Apr 2021 14:10:00
Message: <web.608069edc2ce34cbfd796d7fb7ae6630@news.povray.org>
Mike Horvath <mik### [at] gmailcom> wrote:
> I have some mesh based terrain model. I would like to drop trees
> vertically on to it based on some rules:
>
> 1. the trees should not overlap with each other
> 2. the tree density should depend on the (configurable) slope of the ground
> 3. trees are circular so the only important data is the radius of the tree
> 4. the script needs to output the generated coordinates to a text file
>
> Can someone help me write such a script? Thanks!
>
>
> Michael



I know that Thomas made some very nice macros public in this thread, but I want
to point to an old macro made by JRG (Jonathan Rafael Ghiglia) back in 2001 -
his "clutter macro". Since I wasn't able to find the link on this server I
include the macro here.

With some modifications every point of your list is doable - perhaps I'm able to
do it in the next days. Especially interesting is your first point - but I
haven't looked into Thomas macro regarding it - perhaps this problem is already
solved...

Furthermore, if you want to use a very large number of trees, you should use
only visible coordinates. Back in 2005 I published a method
(http://news.povray.org/povray.binaries.scene-files/message/%3C432414bf%40news.povray.org%3E/#%3C432414bf%40news.povray
.org%3E
for macro -
http://news.povray.org/povray.binaries.images/thread/%3Cdg0ifb%242oi%241%40chho.imagico.de%3E/
for the thread).


Stay healthy
Norbert


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Attachments:
Download 'clutter.zip' (73 KB)

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