Re: [Flightgear-devel] update

[Alex P. <ale...@ie...>]

> going through the virtual corners ... same exact problem when you are
> driving in a real car just seeing the hud (not seeing the road) ...
> No one went off the road, but there was a couple close calls. :-)

They have the same problem with people using HUD virtualized
graphics for manually landing aircraft after an approach.

Try putting irrelevant objects of known fixed height and fixed separation
along the side of the road.  The human brain tends to measure distance
by vertical height of objects, not lateral width, which makes roads hard.
Make sure the objects have a "surface area" because the human brain 
judges speed by how fast the outline of scene objects is enlarging.

A trick used on some HUDs is to draw (in perspective) the tire tracks
that the car is capable of turning (as an arc) on good pavement at the
current speed and (if you have good acceleration data) braking curve.
It makes driving race tracks a whole lot easier (but still not easy).

PS.  In-car photo ?