From: Trevor G Quayle
Subject: Re: SLOOW CSG rendering with large num of complex objects (union or merge)
Date: 11 Jan 2008 16:40:01
Message: <web.4787e1982ef1916dc150d4c10@news.povray.org>
"COMPATT" <com### [at] hotmailcom> wrote:
> Thanks again for all the help.> I already know how to do that part by pre-processing the crater data so POV-Ray> will not have to test each crater against all of the already existing ones for> the overlap condition. This is not to hard to do using C++ I just didn't want> to waste time trying to reduce parse time when it would still take almost a> week to render the scene after parsing was over.>> If I can end up reducing parse time half as much as I have the rendering (with> the help of all your advice)This macro may even be useful in animations.>> I had planned on adding blobs to the macro down the road for making craters on> irregular shapes like asteroids. It never occured to me I could use a blob> object for the spherical planets and moons as well.>> Thanks so much for providing the missing puzzle piece!!
Ah, looks like you're facing the placing non-intersecting spheres, O^n
conundrum. We had a bit of a go at this in a couple threads last year with
very good results (in the order of 10-20x speedup depending on parameters).
Original discussion:
http://news.povray.org/povray.binaries.images/thread/%3C4468e90a%40news.povray.org%3E/?ttop=257697&toff=1000
Resulting techniques posted here:
http://news.povray.org/povray.advanced-users/thread/%3C446b33a3@news.povray.org%3E/?ttop=255728&toff=100
One of the successful techniques was by me, so feel free to post any questions.
Warp had a completely different technique, but with similar speedup times here
as well, feel free to ask him questions, but I can't guarantee the response ;)
-tgq
From: Trevor G Quayle
Subject: Re: SLOOW CSG rendering with large num of complex objects (union or merge)
Date: 11 Jan 2008 16:50:00
Message: <web.4787e3802ef1916dc150d4c10@news.povray.org>
From: Trevor G Quayle
Subject: Re: SLOOW CSG rendering with large num of complex objects (union or merge)
Date: 11 Jan 2008 17:00:01
Message: <web.4787e6332ef1916dc150d4c10@news.povray.org>
"Trevor G Quayle" <Tin### [at] hotmailcom> wrote:
> "Trevor G Quayle" <Tin### [at] hotmailcom> wrote:> > Resulting techniques posted here:> >
http://news.povray.org/povray.advanced-users/thread/%3C446b33a3@news.povray.org%3E/?ttop=255728&toff=100>> Try again...>
http://news.povray.org/povray.advanced-users/thread/%3C446b33a3@news.povray.org%3E/?ttop=255728&toff=100>> -tgq
I'll try without the http...
news.povray.org/povray.advanced-users/thread/%3C446b33a3@news.povray.org%3E/?ttop=255728&toff=100
If this link doesn't work, just search for "Random placement of non-intersecting
spheres" from May 2006 (hmm, maybe it was 2 years ago) in povray.advanced-users
Man I suck at this...
-tgq
From: Nicolas Alvarez
Subject: Re: SLOOW CSG rendering with large num of complex objects (union or merge)
Date: 11 Jan 2008 17:03:54
Message: <4787e7ca$1@news.povray.org>
All three link attempts worked for me.
But try tinyurl.com for next time.