HUD Information

So I have been scripting and building away in Second Life and learning a lot. I have yet to use HUDs. Is there a good place to look for information on making HUDs, how they work, etc., or better yet, some good open source HUDs, since I learn best by "reverse engineering." Many thanks,

Everett

If you have a HUD, rezz it on the ground to have a look at the design. Some rotate after activation, and you will see all sides of the object when rezzed on the ground. Most HUDs appear to be a linked set, of some number of prims, all communicating with each other - likely with llMessageLinked fxns.
There is a good open source HUD described at this page and also at this page , do not know if that offer is still valid.
HTH

HUDs are, in essence, simply objects that are attached to a HUD attachment-point on the avatar.

Some important notes on HUDs:

--If you have buttons on your HUD, you'll want to be sure to set llPassTouches(FALSE) for each button prim's script, or all touches will act as if the root-prim had been touched.

--Use llMessageLinked() efficiently, as interactive HUDs can quickly be filled with messages back and forth between HUD pieces.

--HUDs will not do some things normal attachments will...like detect moving_start or moving_end or apply Force or Impulse to an avatar. Think of the HUD more as a UI object than an 'in-world' attachment and you should be fine here.

Other than that...a HUD is a scripted object.

Another important note.. if your HUD is a simple "say" hud... then ignore what Kenn said about llPassTouches...

Here's why.

This has GOT to be the awesomest "quick HUD" script in existence. I can't take credit for the idea.. but here goes.

integer hudchan = 0; // for testing purposes

default
{
touch_start(integer num_detected)
{
llSay(hudchan, llGetLinkName(llDetectedLinkNumber(0)));
}
}

Yes, that's REALLY IT! Put that ONE SCRIPT in the "core" prim of your HUD.. and I swear to you, ONE SCRIPT can handle 254 buttons!

What this does... say you want a button to say "on".. simple, make a prim button that is named "on".. need one to say "resize?"... how about "delete" or ""pause"... Anything you might have a customer type on a channel, a HUD can do for you!

Tired of customers complaining that the whole "/33 start" is too annoying to remember? Make them a handy HUD!

Just remember that:
llListen(hudchan, "", llGetOwner, "";
WON'T WORK for this. You've got to have a more=open listen, with a "filter" in the listen.. something like:

if(llGetOwnerKey(id) != llGetOwner) return;

Hmm. Don't know about the moving_start and moving_end, but I believe you can still apply forces and impulses from a HUD attachment just fine.

You can, but root prim only.