[Opensim-users] creating bots at negative elevation

Wed Feb 1 01:24:52 UTC 2012

If it's -20 on SL then that could well be the case.  Thanks for looking that up.

On 01/02/12 01:23, Gudule Lapointe wrote:
> Just checked in Second Life (argh) where raise and lower are set to 20 and -20. Which sounds more familiar with ground level set to 20.
>
> Would it be possible that lower limit is the limit allowed from ground level? And thus, should not have been set with a low limit greater that ground level?
>
> (Just an idea, don't take this as an advice, I don't know much about OpenSim nor the viewers core code)
>
>
> Le 1 févr. 2012 à 02:16, Justin Clark-Casey a écrit :
>
>> Actually quickly googling makes me come across my own webpage where terrain lower limit was changed way way back to -100 instead of 100, apparantly to remove terraforming issues in manipulating land below 100m.  Why this is -100 rather than zero though I don't yet know.
>>
>> [1] http://justincc.org/blog/2008/07/06/this-week-in-opensim-dev-week-ending-saturday-5th-july-2008/
>>
>> On 01/02/12 01:08, Gudule Lapointe wrote:
>>> Call the police ;-)
>>>
>>> In my viewer, the region settings show, by default:
>>> 	- water height	20
>>> 	- terrain raise limit:	100
>>> 	- terrain lower limit:	-100
>>>
>>> These are the default values, I didn't change them, so I guess it's not "illegal" to go under zero… Or is the terrain lower limit based on something else than elevation?
>>>
>>> Though I admit it's odd to want to go so deep, I understand it's needed for a big under-water project like Titanic….
>>> (the only work-around would be to change water elevation, which would be quite odd for surrounding regions)
>>>
>>>
>>> Le 1 févr. 2012 à 01:59, Justin Clark-Casey a écrit :
>>>
>>>> To me, zero level is the co-ordinate z = 0, where it's totally illegal to try and place anything in a negative co-ordinate.  Under the water is different, at which point ground, to me, is the sea/riverbed.
>>>>
>>>> On 01/02/12 00:52, Gudule Lapointe wrote:
>>>>> (JCC: Having seen the project, I know this is not "under the ground", but deep in the water, which goes far below zero level, due to project needs…)
>>>>>
>>>>> I wouldn't be surprised if NPC was just coded without thinking somebody would try to do this ;-)
>>>>>
>>>>> Paul, I would suggest using the NPC sit functions on an object at the desired position (http://opensimulator.org/wiki/OsNpcSit) to force the NPC go that deep, and after that you are free to make it stand or stay sitting…
>>>>>
>>>>>
>>>>>
>>>>> Le 1 févr. 2012 à 01:36, Justin Clark-Casey a écrit :
>>>>>
>>>>>> By negative elevation, I presume that you mean below some arbitrary plane, rather than below ground? ScenePresence.CompleteMovement(), which is how the NPC (and any avatar) enters a scene does have code to prevent attempted rezzing below ground.  This is just using a 1.5f constant.  It's possible that if you're very near the ground then you would have a problem.
>>>>>>
>>>>>> On 31/01/12 20:56, paul emery wrote:
>>>>>>> I need to create some bots in our model of titanic which is underwater AND in
>>>>>>> fact is at negative elevation. My trigger object has a notecard with the bot
>>>>>>> information in it and a script with a touch_start event handler.
>>>>>>> In the touch event are these lines of code.
>>>>>>>
>>>>>>> vector npcPos = llGetPos()+<.5,0,0>;
>>>>>>> pc = osNpcCreate("Mr.", "Bot", npcPos, "mycard");
>>>>>>>
>>>>>>> What i find is that if the object is at zero elevation or above the bot is
>>>>>>> created half a meter from the object's position. However, if the object is
>>>>>>> at a negative elevation the bot is created at zero elevation and falls down
>>>>>>> to the elevation of the trigger object. This is interesting. Note that if
>>>>>>> the trigger object is up at any positive elevation the bot is created at
>>>>>>> that elevation.
>>>>>>>
>>>>>>> The problem is that if i try to create a bot at a negative elevation in a
>>>>>>> room below deck i.e. that has a non-phantom roof the bot never can fall all
>>>>>>> the way down because they are not able to fall through the roof.
>>>>>>>
>>>>>>> Any body got any ideas on how do deal with this. It does seem like expected
>>>>>>> behavior would be to allow npcPos() to include negative elevation.
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> View this message in context: http://opensim-users.2152040.n2.nabble.com/creating-bots-at-negative-elevation-tp7241166p7241166.html
>>>>>>> Sent from the opensim-users mailing list archive at Nabble.com.
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>>>>>>
>>>>>>
>>>>>> --
>>>>>> Justin Clark-Casey (justincc)
>>>>>> http://justincc.org/blog
>>>>>> http://twitter.com/justincc
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>>>>
>>>> --
>>>> Justin Clark-Casey (justincc)
>>>> http://justincc.org/blog
>>>> http://twitter.com/justincc
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>>
>> --
>> Justin Clark-Casey (justincc)
>> http://justincc.org/blog
>> http://twitter.com/justincc
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-- 
Justin Clark-Casey (justincc)
http://justincc.org/blog
http://twitter.com/justincc