POV-Ray : Newsgroups : povray.binaries.images : Apparent bounding bug in sphere_sweep : Re: Apparent bounding bug in sphere_sweep Server Time
20 May 2024 12:46:03 EDT (-0400)
  Re: Apparent bounding bug in sphere_sweep  
From: clipka
Date: 30 Apr 2013 03:44:35
Message: <517f7663$1@news.povray.org>
Am 30.04.2013 05:37, schrieb Kenneth:
> clipka <ano### [at] anonymousorg> wrote:
>
>>
>> The first thing to note is that whenever you transform an object,
>> obviously the bounding box needs to be adjusted accordingly.
>>
>> This is generally implemented in a pretty braindead manner: The bounding
>> box is re-computed from scratch.
>>
>> Normally this does not interfere with custom bounding boxes, because
>> those are applied only at the closing brace of the object statement,
>> when all your transformations are done already.
>>
>
> I'm wondering about the implications of this during SDL coding--the ordering of
> terms. If I'm understanding this correctly, is the placement of the bounded_by
> object actually important? (The docs are silent on this issue, except for a
> single example with no in-depth explanation.)

The ordering does matter: A bounded_by object does undergo all 
transformations placed /after/ it, but not those before it.


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