Re: [Flightgear-devel] Runway intersections

[Bruce F. <bfi...@ho...>]

Norman Vine wrote:
> 
> Curtis L. Olson writes:
> >
> >Erik Hofman writes:
> >> Is the following an option?
> >>
> >> 1. Draw th runways without a texture (eg. black or gray strips).
> >> 2. then add a skidmark texture
> >> 3. draw the stripes (and text) using polygons over it.
> >
> >It is rather difficult to draw co-incident polygons in opengl.
> 
> Yup..  I would think that this would need to use some tricky
> stencil buffer stuff so as selectively draw only pieces of the
> standard textures inside the intersection zone
> 
> I can't think of any other way to avoid 'z' issues
> 
> >Even so, no one has addressed the issue of how you figure out where to
> >put the markings if you have to move them to avoid an intersection.
> >That is the harder question in my mind.
> 
> This is probably buried somewhere inside the airport marking regulations
> spec somewhere if some one wants to do some research
> 
> http://www.faa.gov/AIM/Chap2/aim0203.html
> 
> BUT IMHO we currently have bigger fish to fry :-)
> 
> Cheers
> 
> Norman
> 

The official FAA specification is AC 150/5340. You can down load the
various parts of it from http://www.faa.gov/arp/150acs.htm look in the
design section, there are several parts dealing with markings, lights,
signage and taxi ways. The AIM does reference this circular by the way.
This take care of US runways, what about marking specs in other parts
of the world??? If anyone knows of links to other specs I would be
interested.

enjoy,

Bruce