POV-Ray : Newsgroups : povray.pov4.discussion.general : A dream about POV4 : Re: A dream about POV4 Server Time
4 May 2024 05:35:44 EDT (-0400)
  Re: A dream about POV4  
From: Zeger Knaepen
Date: 13 Apr 2009 19:17:57
Message: <49e3c825$1@news.povray.org>
"clipka" <nomail@nomail> wrote in message 
news:web.49e3c66a840aad1a2dae03a10@news.povray.org...
> "Zeger Knaepen" <zeg### [at] povplacecom> wrote:
>> I disagree, I almost always specify the axis (rotate y*45 for instance) 
>> and
>> intuitively I would expect something like "rotate <1,1,0>*45" to rotate 
>> 45
>> degrees around the <1,1,0> vector, not 45 degrees around the x-vector
>> followed by a 45 degrees rotation around the y-axis
>
> Hm... the notation "rotate <1,1,0>*45" does seem intuitive, but I guess 
> we'd
> need four parameters. Otherwise you'd be surprised why the result would be 
> a
> rotation by 63 degrees instead ;)

the vector is just a direction, and, as in trace, the length shouldn't 
matter

cu!
-- 
#macro G(b,e)b+(e-b)*C/50#end#macro _(b,e,k,l)#local C=0;#while(C<50)
sphere{G(b,e)+3*z.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1;
#end#end _(y-x,y,x,x+y)_(y,-x-y,x+y,y)_(-x-y,-y,y,y+z)_(-y,y,y+z,x+y)
_(0x+y.5+y/2x)_(0x-y.5+y/2x)            // ZK http://www.povplace.com


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