POV-Ray : Newsgroups : povray.newusers : Odd transformation of cylinders : Re: Odd transformation of cylinders Server Time: 29 Oct 2020 22:19:43 GMT
  Re: Odd transformation of cylinders  
From: Alain Martel
Date: 11 Aug 2020 16:23:45
Le 2020-08-11 à 01:30, Cyningstan a écrit :
> 
> I'm not "new" to POV-Ray but returning to it after a number of years. But this
> problem I've run into is definitely in newbie territory.
> 
> I'm building up a basic scene currently using only spheres and cylinders. The
> spheres are acting as I'd expect, but the cylinders are having an odd
> transformation applied to them that I have to undo. They're all being rotated
> -45 degrees around the X axis, and translated down by whatever their radius is.
> For example:

> cylinder {
>    <0 0 -1.25>
>    <0 0 1.25>
>    1
> }
> 

This get interpreted as :
cylinder{<0, 0-1.25> <0,0,1.25> 1}

You can ignore the comas, but only in unambiguous cases. Whenever you 
have a negative value, the coma is mandatory in front of it.

There was a time, prior to version 3.0, where the space was a hard 
separator and when your way of defining the vector was interpreted as 
<0,0,-1.25>. It's been over 30 years that it's no longer the case.


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