POV-Ray : Newsgroups : povray.general : CSG speed Server Time
13 Aug 2024 19:21:14 EDT (-0400)
  CSG speed (Message 1 to 4 of 4)  
From: Peter Popov
Subject: CSG speed
Date: 13 Jul 1998 10:45:12
Message: <35aa0f68.0@news.povray.org>
I am writing an .inc (I'll post it at binaries.utilities, how about here?)
and I face a problem. Which renders and/or parses faster:

intersection
{    union
    {    object Obj1 texture { T_Obj1 }
        ...
        object { Obj10000 texture { T_Obj10000 } }
    }
    plane { [plane_params and stuff] }
}

or this one:

union
{   intersection
    { object { Obj1 }
       object { Plane }
    }
    ...
    intersection
    { object { Obj10000 }
       object { Plane }
    }
}

Even more important to me is which one is more memory-efficient ( I have 32
Megs )


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From: Dan Connelly
Subject: Re: CSG speed
Date: 13 Jul 1998 22:02:24
Message: <35AAAE17.2F8669E1@flash.net>
Peter Popov wrote:
> 
> I am writing an .inc (I'll post it at binaries.utilities, how about here?)
> and I face a problem. Which renders and/or parses faster:
> 
> Even more important to me is which one is more memory-efficient ( I have 32
> Megs )

Why ask?  POV reports memory usage, processing time, hit efficiency,
and a variety of other statistics.  Do the experiment.  Report
the results.

The same applies to the question about bounding boxes around intersection
objects -- the experiment is trivially performed.

Dan



-- 
http://www.flash.net/~djconnel/


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From: Peter Popov
Subject: Re: CSG speed
Date: 24 Jul 1998 22:40:53
Message: <35b937a5.0@news.povray.org>
I only bothered the NG because I just can't clear enough disk space for
win386.swp in order to have reliable test results. A scene containing just
1000 of those CSGs reported parse times that difffered tenfold due to
intense disk scratching! Should I format d: /u /q in order to get to the
answer myself?


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From: Philip Cowley
Subject: Re: CSG speed
Date: 22 Feb 1999 06:40:26
Message: <36d1422a.0@news.povray.org>
>I only bothered the NG because I just can't clear enough disk space for
>win386.swp in order to have reliable test results. A scene containing just
>1000 of those CSGs reported parse times that difffered tenfold due to
>intense disk scratching! Should I format d: /u /q in order to get to the
>answer myself?


Send me the code and I'll do the test for you... I have a PPro200 with 96Meg
and oodles of disk space...

Personally I want to know which is better....

Phil


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