Things you can't do in LSL

UNAVAILABLE FUNCTIONALITY

You cannot..

- Run a script in anything other than a prim object (such as a piece of non-prim clothing). Notecards can contain scripts, but not run them; everything else cannot contain scripts.
- Prevent an object in world from being taken and/or deleted.
- Run a script on an item that is not rezzed in the world.
- Alter any avatar's inventory in any way, other than giving them objects.
- Alter any avatar's shape parameters or clothing in any way. (Some custom clients allow this.)
- Have a script transfer ownership of the object that that script is in.
- Remote load a script into an object owned by someone else.
- Find out how much money an avatar has.
- Take money from an avatar other than the owner, except by them click-paying the object.
- Take any money from the owner, without requiring the owner to give your object permission to potentially take _all_ their money.
- Create a new notecard from scratch, or change or append to the contents of a notecard (except by communication with a bot).
- Invite people into groups (except by communication with a bot).
- Attach an object to an avatar other than its owner.
- Display a dialog to which the user is forced to respond.
- Find out that the user pressed Ignore on a dialog box.
- Get, or set, attachment positions or rotations relative to the sim. (This may be possible only if you lock the avatar into a particular animation for which you know the attachment offsets, then set the attachment locations based on the avatar's position in the sim. But as soon as any of the armature limbs move, your object will move with them)
- Detect collisions between attachments and items in the sim. (But if you scripted the items you want to detect collisions between, you might be able to calculate them manually based on the avatar's bounding box.)
- Change the permissions of an object - either the scripted object, or others in its inventory.
- Recieve IMs, or send them to other objects.
- "Touch" other objects. (But if you scripted the other object, you can have your object send a message telling the other object to behave as if it had been touched.)
- Recieve HTTP requests.
- Dispatch XMLRPC calls.
- Store an unlimited amount of anything. (Each script has only 16k of memory, or 64k under Mono. You can store more substantial amounts of data via HTTP requests, but there is always some limit.)
- Rotate an avatar, unless they're sitting on an object.
- Prevent the scripts from being removed from an object (even a no-modify object!)
- Get or set the "buy" price or status of an object. (An LSL function for this, llForSale, has been specified but not implemented.)
- "Take" an object from the world.
- Return another object. (It may be possible for an object to force _itself_ to be returned.)
- Confirm that a transaction requested via llGiveMoney actually happened (except by communication with a bot).
- Send a message that looks exactly like an avatar's chat. (Script chat is always a different colour.)
- Get the resolution or aspect ratio of the user's display. (So be careful when making HUDs.)

UNSTABLE FUNCTIONALITY

You can't, RELIABLY:

- Prevent an attachment being removed. (The RestrainedLife client allows scripts to block attachments from being removed, but the user can choose not to use this client.)
- Find out the name of a group, or the contents of a user's profile. (This can be found by using HTTP requests into the world server which is intended for search by the GSA, but this is not sanctioned by LL and contravenes the specification of llHTTPRequest, so may disappear.)

- Create notecards or write to existing notecards
- Invite people into groups
- Find the name of the group that an avatar is currently in (I think)
- Find out if an avatar is in a group that they don't currently have active

- write to a notecrad

- Have an object attach itself to someone who is not its owner (even if they give permission)
- Be able to tell when the user presses the IGNORE button on a dialog pop-up

it can find the key and see if it matches... so it shoudl know *1* name (hardcoded as the one you set) but llKey2Name Doesn't work for group keys last I knew, so yeah "mostly" (you can use http functions on search to get the name from the key, IF you can get the key.... it's only exposed in certain circumstances)

- make Avatars Phantom (alas poor llVolumeDetect hack, I knew thee)
- get/set attachment rotations relative to sim (and will NEVER happen)
- get/set sitting avatar positions as child prims (Works Again)
- set permissions

You all might consider putting this into the LSL Portal rather than here, that way it would be much easier to reference and update.

http://wiki.secondlife.com/wiki/LSL_Portal

nevermind

*stickies*

Despite this true claim I do have a script that can access differential information on a balance account of some other avatar.

Become instantly rich, famous, and/or get hot babes ^_-


On a more serious note, to my knowledge, lsl cannot buy/sell your linden $ on the market.

- Send IMs to other objects (only to avatars) or receive IMs (only slow e-mail)
- Store data persitently from a script anywhere except in object name/desc
- Create/Use objects
- Receive incoming http requests or initiate outgoing XML-RPC connections (and incoming XML-RPC often fails without notification to the sender)
- Do an actual teleport (though this was in the docs for future implementation llTeleport(string sim_name, vector location); )
- Use lists like arrays (there is a size limit)
- Use a switch/case statement (and if/else if chains are limited to 24 or so)
- Use callback methods
- Create your own events

And several more items that programmers from outside SL are sure to be missing, like classes and such.

There are strict (and low) memory constraints as well.

Rename an object's name or description if it is in inventory or in another object. You can only do it if it is rezzed. Same goes for turning off and on a script if it is in the inventory of an object inside an object.

And a script can not write notecards, bears mentioning again and again and again

write to notecards

write objects description

instant message objects

- Alter the rotation of a non-sitting avatar
- Get the in world coordinates of an attachment
- Alter the permissions on any object

Object->object llEmail can't be intercepted via any scripted means.

Right, neither can a message routed via llHTTPRequest to an outside source which proxies it to another object via XMLRPC. I think this item should be removed from the list.

Technically it is but it'd require breaking in to the SL mailservers and finding the account of the object (In this case it's key)

Anyway erhm on topic:

- Create the ultimate cyberbabe?
- Execute code said in the chat (This list was for beginners right? As with a whole lot of scripting and string stripping it would be possible to execute LSL functions or even some custom functions if you want to go really deep)

See llSetObjectDesc (http://wiki.secondlife.com/wiki/LlSetObjectDesc)


See llSetInventoryPermMask (http://wiki.secondlife.com/wiki/LlSetInventoryPermMask)

Can a script tell that the object in which it resides is being "taken" into a user's inventory - so that the script can make preparations for storage?

Only works for Lindens.

It can tell a new owner on rez, or on detach, or by timer.. assuming that you've got a function that stores the current owner in a variable and compares the result of llGetOwner() with the stored variable.

oops, yeah.

I assumed the "Deformers" and "UnDeform buttons" described here used a script to deform the avatar, is that not correct?

Deformers

Those are just animations. They dont' cahnge the appearance of the av, per se, just the relationships between the av's "bones", like any animation does.