Particles from a HUD?

Can prims in a hud emit particles? I want to simulate battle damage for a combat control HUD.

I haven't tried this myself but I understand that particle systems work on HUDs but are only visable to the person wearing the HUD.

Also, I remember hearing that particle systems in HUDs which target a key (i.e. avatar, object etc) emitted from the 0,0,0 position of the simulator, though I'd have to test to confirm this and perhaps it's been fixed already. Again these particles should only be visable to the wearer of the HUD.

I'm guessing this isn't the behaviour you are looking for and instead a seperate attachment should be used which listens on a high channel for a string from the HUD (i.e. "hit". You could also check that the

llGetOwner() == llGetOwnerKey(llDetectedKey(0))

in the listen so that theres no possiblitity of detecting someone elses hit.

If you can make HUD emit particles, and if they do only appear for only the owner, I'm tempted to try and make a targetting system, like overlaying targets on a person (green for friendly, red for griefer). I've been looking for a way about doing this, this could be it. Just gotta wait for the grid to come back on now. Otherwise, I need to beg for functions that allow you to sense object and agent on-screen positions.

Actually, it's PRECISELY the behavior I'm looking for. The goal is to add verisimilitude for the player, so it doesn't matter if nobody else sees it but the person wearing the HUD.

There's a freebie Chat Range HUD that labels av's with their range from the person wearing the HUD, and it reasonably accurately puts those labels over the av's, so a) it must be possible with the functions we have now, and b) it must be fairly easy to do.

One thing that's always bothered me is that if I want to target some avatar, I always wind up targetting their crotch. While this is entertaining, I'm usually hoping for a head shot or at least a torso shot..

I tested particles on the HUD, but they didn't seem to appear at all. Did someone else get this to work?

Drat.

Well, the next possibility is to have prims with textures that move to overlay the view of a tracked target - as mentioned above, this must be possible and is probably how the chat range HUD works, by putting a title over an invisiprim that contains the range to chat target information.

All you need is to put a crosshairs graphic on that prim, and you've got a targetting reticle.

Position of AV is likely in the centre of their bounding box which yes, winds up somehwhere in that area.

For head shot, you can probably utilize fact bounding box is notoriously off when it comes to 'real' dimensions of avatar -- if you add half of height of bounding box to avatar's position, it'll wind up somewhere around their eye level.

Have fun with the math for that. You'll have to compensate for the camera's zoom, focus, and position, if it's possible at all.

Particles emitted from a HUD are visibile at <0,0,0> of the sim (I don't know if I should cry or laugh...)

I was suspecting something like that. Now, are they visible to everyone, or just you?

It seems only to me

Excellent. Now we just need to set the age long enough and the particle big enough to be noticed. Hmmm...

Hmmm, a very limited targetting HUD system could be made by setting the target key... Have a beam of particles fly from 0,0,0 to your target lol , if they are within 72m of the sim origin of course.