[Radiance-dev] Re: [Radiance-general] Re: Rvu window? (moved from Radiance-dev)

[Carsten Bauer]

Peter Apian-Bennewitz wrote:

>       (described below), most X programs accept a command line argument 
> of the form -geometry WIDTHxHEIGHT+XOFF+YOFF (where  WIDTH,  HEIGHT,  XOFF,
>       and YOFF are numbers) for specifying a preferred size and location 
> for this application's main window.
> 
> whereas rvu says:
> 
> merkur $ rvu -geometry 800x600 -vf close.vf baugruppen.oct
> rvu: fatal - command line error at '-geometry'
> 
> -Peter
> 

the following is evident for the developers, but probably not to 
everyone else:

the problem is (can be ..) a double one. I mean that that setting the 
window size and height by the user might also reflect the wish to set 
the image dimension for the view, this includes the aspect ratio. In 
Radiance, however, the aspect ratio is determined by the vertical and 
horizontal view angle, and even in rpict the width or the height in 
pixels is overriden if the angle aspect ratio doesn't match the pixel 
aspect ratio.

so apart form handing over pixel values to the X-server the question is 
which values should have priority (angles or pixels), this is - as 
always - one of personal preferences (I personally like the latter 
version, this is why 've changed it..)

If you simply set the window sizes in pixels, and the ratio doesn't 
match the angle aspect ratio, you'll end up with a window filled only 
partially by the image in one dimension, which doesn't look very 
professional. That's probably one reason why Radiance doesn't allow the 
user to interfere at this stage.. :-)

-cb