Re: Re: Photo

mat churchill wrote:
> I would be really grateful if someone could give me a brief explanation
> of what the photo utility does and how the images created using chop.pl
> are linked to whatever photo creates. 
> 
> I can't seem to find any information on it other than the two threads
> included below.
> 
> I'm trying to work out  what the following means.
> 
> Usage photo root image(base) xdiv ydiv x0 y0 x1 y1 x2 y2 x3 y3

Off the top of my head ...

photo is the name of the executable.

image is the name of your image file (texture).  Well actually the base 
name minus the chunk number created by the "chop.pl" utility.  xdiv and 
ydiv are the grid size in the lon and lat direction respectively.  (x0,y0) 
.. (x3, y3) are the coordinates (probably in lat/lon?) of the photo area to 
create.

This creates a hole in the default scenery and creates an object that files 
that hole.  The object has the photo texture applied.

The reason for the xdiv/ydiv is so that you can chop larger images up into 
chunks that fit within video card limits (i.e. 256x256 pixels for the 
voodoo card I was using at the time.)

Regards,

Curt.
-- 
Curtis Olson   HumanFIRST Program               FlightGear Project
Twin Cities    curt 'at' me.umn.edu             curt 'at' flightgear.org
Minnesota      http://www.flightgear.org/~curt  http://www.flightgear.org