WD-DALI-1.1 polygon winding direction

[Patrick Dowler]

As agreed in Stellenbosch, I have just committed rev 3530 specifying
that polygon winding direction is counter-clockwise. I chose that
because the simple sort of algorithms to compute area are positive for
CCW and negative for CW and I instinctively draw polygons that way.

The diff is here:

https://volute.g-vo.org/viewvc/volute/trunk/projects/dal/DALI/DALI.tex?r1=3406&r2=3530



-- 
Patrick Dowler
Canadian Astronomy Data Centre
Victoria, BC, Canada