[Radiance-general] rotate in rview

[Greg Ward]

Hi Tarik,

The pivot ("p") command in rview/rvu will rotate about a chosen point 
(i.e., the axis is the up vector through the selected point).  Quoting 
the rview man page:

        pivot angle [ elev [ mag [ x y z ] ] ]
                  Similar to the "move" command, but pivots the  view  
about  a
                  selected  point.  The angle is measured in degrees 
around the
                  view up vector using the right hand rule.  The 
optional  elev
                  is  the  elevation  in degrees from the pivot point; 
positive
                  raises the view point to look downward  and  negative  
lowers
                  the view point to look upward.

The first argument is the angle (clockwise about point in degrees), the 
second is the elevation change, the third is the zoom factor, and 4-7 
specify the point if you prefer to enter it manually rather than pick 
it from the current view.

You do have the man pages, I hope.  If not, they can be found online at 
the LBNL website:

	http://radsite.lbl.gov/radiance/man_html/whatis.html

-Greg

> From: Tarik Rahman <tarik.rahman at ed.ac.uk>
> Date: September 8, 2004 7:08:51 AM PDT
>
> Hi
> Stupid question, I can rotate in rview e.g  r 45, but how do I specify 
> rotate
> about a certain axis and also how do  I say to elevate by a certain 
> angle? Do I
> have to change the viewpoint file altogether or can this be done in 
> rview?
>
> Thanks
>
> Tarik
> --
> Tarik Rahman
> PhD student, Institue of Perception, Action and Behaviour
> School of Informatics
> University of Edinburgh