[Opensim-dev] llDetectedType and NPC's

[Argus]

I think Dahlia means the symbolic constant being the same. Dahlia 
pointed out in the mantis that LL might be implementing the symbolic 
constant NPC for something else...

Am 12.07.2012 04:19, schrieb Melanie:
> Then it will be a case in point to use symbolic constants, not magic
> numbers.
>
> Melanie
>
> On 12/07/2012 03:58, Dahlia Trimble wrote:
>> So what happens when LL defines "NPC" and it means something different that
>> what is defined in OpenSimulator?
>>
>> And yes, I believe the probability is quite high that they will eventually
>> define it.
>>
>>
>> On Wed, Jul 11, 2012 at 5:01 PM, Justin Clark-Casey <
>> jjustincc at googlemail.com> wrote:
>>
>>> That's a neat solution, Argus.  Since the intention of
>>> OS_NPC_SENSE_AS_AGENT was to provide compatibility rather than 'fool', I
>>> think returning both NPC and AGENT flags would be perfectly acceptable.
>>>   Let's see if there are any other comments, otherwise I think we can
>>> proceed along those lines.  I'm still not that happy with extending
>>> llDetectedType() but leakage has already occurred and I suspect its
>>> inevitable.
>>>
>>> On another note, I'm not sure what 'plausibility' checks you're referring
>>> to.
>>>
>>>
>>> On 11/07/12 13:04, Argus wrote:
>>>
>>>> I am fully aware of the open source factor and that in each open grid
>>>> everything can be changed, which is why one always
>>>> needs backend function to make sure no fals information is passed on to
>>>> the central service. One can however filter 99%
>>>> of the fals data in the local sim which helps the central service because
>>>> it does not need to process every single
>>>> plausability checks. In a multi grid environment with closed grids we
>>>> even have a lower chance of false data beeing
>>>> passed than in a open grid only environment.
>>>>
>>>>    We have the same situations in opensim were the simulator often does
>>>> some local plausability checks before it send
>>>> data to the gridservers. The gridservers again do a plausability check
>>>> combined with other methods which are not
>>>> available on the local sim. Only if all steps are plausable the data gets
>>>> processed further.
>>>>
>>>> Anyway, I added a new patch for llDetectedType were NPCs always return
>>>> NPC and useing OS_NPC_SENSE_AS_AGENT will returns
>>>> AGENT + NPC. I think that is an acceptable compromize... I also added an
>>>> example script were the true NPC detection
>>>> always makes sense  ;)
>>>>
>>>>
>>>> Am 11.07.2012 02:01, schrieb Justin Clark-Casey:
>>>>
>>>>> Argus, if your system relies on always reliably identifying unique
>>>>> avatars then that is simply not possible in any
>>>>> OpenSimulator environment where simulators are controlled by third
>>>>> parties or where hypergrid travel is allowed.
>>>>>
>>>>> Even if OS_NPC_SENSE_AS_AGENT did not exist, then people would be able
>>>>> to compile a version of the code that did have
>>>>> that functionality. This is not about ideology - it's about what is
>>>>> physically possible!
>>>>>
>>>>> Equally, it is perfectly possible to create duplicate HG details -
>>>>> anything can be put in the agent data that comes
>>>>> from a foreign grid (justin at hg.osgrid.org or whatever).  You cannot
>>>>> rely on these to be unique either.
>>>>>
>>>>> Without any central authority (like DNS, the secure certificate
>>>>> infrastructure of something like Bitcoin block chains)
>>>>> it is simply not possible to uniquely identify avatars.
>>>>>
>>>>> I don't see this as much different from the web where one has to get
>>>>> people to create unique accounts with passwords
>>>>> in order to identify them later.  Such a thing has to be done in some
>>>>> authority system outside of OpenSimulator itself.
>>>>>
>>>>> If your point is that without OS_NPC_SENSE_AS_AGENT then the vast
>>>>> majority of systems would always present NPCs as
>>>>> NPCs (rather than agents) then I would agree.  In fact, in practice most
>>>>> people won't use OS_NPC_SENSE_AS_AGENT anyway
>>>>> as it's the option rather than the default.  But you cannot rely on
>>>>> uniquely identifying avatars on any environment
>>>>> outside those that you directly control.
>>>>>
>>>>> On a minor note, script functions that don't make any sense for NPCs
>>>>> should behave as if the UUID they received did
>>>>> not relate to a valid entity for that function.
>>>>>
>>>>>
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>>>>
>>>>
>>> --
>>> Justin Clark-Casey (justincc)
>>> http://justincc.org/blog
>>> http://twitter.com/justincc
>>>
>>>
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>>>
>>
>>
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