alexis bory wrote:

> Did anybody asked about a way to keep the hud's marks inside the hud
> screen ?
> 

If you are talking about the HUDs controlled by the 'h' key, I don't
know the answer but I know it can be done so long as you want to
constrain them to a rectangle. If you are talking about the kind of HUDs
made from 3D objects, then read on.

I was thinking about this just last night. I came up with a solution
based on layering of transparent images. Rendering a transparent poly
that is a) between some object and the viewpoint and b) listed before
that object in the scenegraph will cause that object to become invisible
wherever it is obscured by the transparent object. This is the genesis
of many layering problems for 3D modelers.

My idea is to create such an object as a mask that goes around the edge
of the HUD. You put it almost last in the scenegraph so it doesn't cause
this problem with bits of the cockpit, but you put the objects with the
HUD markings after it in the scenegraph, and located physically out at
the focal point of the projector. This point will probably be somewhere
just out past the windscreen. When your head is in the right spot, you
will see the markings through the hole that is cut in the middle of the
screen, but if the markings or your viewpoint moves too far off to the
side the markings get obscured by the mask.

I'm planning on trying this method with the 3D model for Lee E's
CanberraBI8.

Josh


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