Negative Mass Objects: Let's be honest here...

Okay Okay, read the whole post.
From what I can tell, Negative Mass Objects are a touchy subject. I asked several people about them, and how to make them, but alas, no information. They said it was a bug and they didnt want to spread the information because it's "damaging to linden's servers".
For those of you who dont know what negative mass objects are, its when you give an object or prim negative mass. I've been told that putting a bunch of objects with negative mass on an avatar will propel the avatar so far into the ground- causing them to appear in space, around 2 billion meters high.
Now here's what Im wondering, how do you do it? The PsiTEC combat system has negative mass on their traps, thats what makes them orbit you up to 247857986745 meters in the sky.
Is it just a script...or does it require other objects as well? How much negative mass can you have? Are there any non-grief uses for negative mass?

I searched the forums and found nothing, so i started this topic.
If you dont want to post the technique, just PM it to me. I need to know this.

Thanks,
/craze3

You may be able to use them to make a large vehicle movable.
==Chris

bump.

thelittle boys of psitec and all the other childs that sell items that orbit you to a million meter and more are ma&king money on devices that , on top of being pure griefing tools - can wreck attachments allignments and thus permanently dammage em, you really want to be in the same basket as such peoples?

"Do no harm."

THAT should be in a scripter's creedo, right after "Ohhhhhh... What does THIS button do?"

Of course not, but I still want to know how it's done. Do you know?

Moving to Scripting Tips.

Off the top of my head, I think it has something to do with putting negative values in llSetMass, but I'm not a scripter so don't quote me on that.

There is no llSetMass, only llGetMass. If you wanna change an objects mass, you need to scale it, perhaps even change its property (wood, metal, light, etc), though I'm not sure on that. llSetBuoyancy can be used to mimic a negative mass (same with llSetForce).

Any object with a flight script in it has "negative mass".

You can get my open-source flight script at either of my stores... the one at The Coonspiracy is easiest to find, though the one 500 meters over the big crater in the south side of LostFurest dAlliez is more fun to get to.

I'm sure they have some in the LSL Wiki's script library as well.

hey thanks for your ideas. Any other suggestions? How do planes have negative mass?

You are confusing the use of a script via llSetForce, llApplyImpulse or llMoveToTarget, with a prim, non scripted, that registers as having a mass less than 0.000000.

Well, it used to be that changing the prims properties such as cut start/end and dimpling ,hollowing it can result in a negative mass object. Though dont quote me on that because it might be fixed. Just try experiment with llGetMass in a timer and change the prim till you get a negative mass.

Ah, I wasn't aware that such a thing was possible.

Sounds like the best way to find it would be a random walk hill-climber based on a loop using llSetPrimitiveParams() followed by llGetMass() rather than tweaking it yourself.

I was thinking prim torture was probably the way to get there.

Hill climbing could be fun - but might be hard to reproduce, as you would need to know all the steps to get from point a to point b, and which ones actually made a change... since prim torture relies less on the properties put in and more on the order of operations...