On Tue, 26 Aug 2003 17:24:02 +0100, Alan Smith wrote:

> Yes,  but not everyone makes that assumption. Some people "assume" that 1
> unit is 1 inch and all their modelling is in feet and inches, or if say
> modelling a room of a house, others might choose to assume that 1 unit was
> 1m others may prefer to work in cm.
> 
> It would be nice if people were encoraged to work off the same system, and
> this would mean objects could be copied in an instant with a cut and paste
> between files.   It's also more readable in my view.
> 
> Alan Smith.
> 
> "Rafal 'Raf256' Maj" <spa### [at] raf256com> wrote in message
> news:Xns### [at] 204213191226...
>> ala### [at] aurora-ukcom news:3f4b68aa$1@news.povray.org
>>
>> > Am I correct that POV-Ray does not support units of measurement ie
>> > (mm, cm, m, km, in, ft etc)?
>> >
>> > Wouldn't it be nice if POV allowed something like :- box { <-2cm,
>> > -1cm, 10mm>,  <2cm, 1cm, 1cm> }
>>
>> I just assume at begin of file that i.e.
>>
>> // file ... by ...
>> // 1 unit = 1 cm
>> // 1 m = 100 units
>>

But what is the ratio of say cm to POV units to be if it is built in?
If I am modelling a molecule I might use 1cm = 10^6 POV units, for a
planet, 1000km might = 1 POV unit.

I don't see how you could possible have built in units that suit all
purposes.

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