[Opensim-users] NPC and internal Animations

Wed Mar 7 02:21:40 UTC 2012

Hi satguru,  This was not done deliberately.  If you could post a patch to Mantis with the hack that would be much 
appreciated.  I would probably end up refactoring the code so that both LLClientView and NPCAvatar call a single method 
but you don't need to do that yourself (unless you want to :).

On 07/03/12 01:10, satguru p srivastava wrote:
> Ok, I downloaded and checked the source.
> After some digging around I was able to see what was happening.
> Made some quick and dirty changes and was able to make the NPC play internal animations!! How about that !!
>
> Before I explain what I found let me first state that I was pleasantly surprised by how smooth the whole process of
> setting up and building the project was.
> I was dreading a complicated setup and a large build time.
> The setup was simple and the build pretty fast, usually less than a minute.
> Thank you developers for making this so easy.
>
> Anyway here is what I found.
> If the animation specified in an animation function does not exist in the prim then the server checks to see if there is
> an internal animation with that name.
> If it finds one then it passes its UUID to the client else it passes UUID.Zero.
>
> For normal avatar this is done, I think, by class "OpenSim.Region.ClientStack.lindenUDP.LLClientView" method
> GetDefaultAnimation(string name)
> This basically checks against the animations listed in the "data/avataranimations.xml" file
>
> For NPC this is done by "OpenSim.region.OptionalModules.World.NPCAvatar" method GetDefaultAnimation(string name)
> For some reason this does not perform any check and always returns UUID.Zero.
>
> I copied the method code from LLClientview to NPCAvatar and was able to make the NPC Avatar play internal animations.
>
> Now I am not sure if the code was intentionally written this way and if not then if the hack which I did was the proper
> way to solve this.
> Hope some developer helps out with this.
>
> Thanks
> Sat
>
>
> On 3/5/2012 9:41 PM, satguru p srivastava wrote:
>> I think I will download the source code and have a go at it.
>> Thanks
>> Sat
>>
>>
>> On 3/5/2012 9:08 PM, Gudule Lapointe wrote:
>>> I am not quite sure about the detailed protocol between server and client for animation, so I would be happy if
>>> someone smarter on this field can confirm or correct...
>>>
>>> What I am sure is
>>> - client can play the animation if it's included in the client software or sent by the server
>>> - script can send the animation only if it's inside the prim where the script resides.
>>> That is: first steps needed to animate an avatar
>>>
>>> After the avatar has confirmed and accepted the animation, there is a protocol, which is certainly more complicate,
>>> to deploy this animation to other viewers, (exchange of UUID / animations, updates on moves, whatever…). But it would
>>> occur only once the avatar has confirmed it can handle the animation
>>>
>>> So, it sounds logical to me that the avatar can be animated only if it's own client owns the animation.
>>>
>>> --
>>> http://www.speculoos.net/
>>> secondlife://speculoos.net:8002/
>>> Speculoos, the belgian cookie-flavored metaverse
>>>
>>> Le 6 mars 2012 à 03:46, satguru p srivastava a écrit :
>>>
>>>> I guess I must be dense :(
>>>> I still do not get it.
>>>>
>>>> Below is how I think the animation system works.
>>>> Let me know where I am wrong.
>>>> I have a Avatar or a NPC with an attachment.
>>>> The attachment has script which plays an animation using an animation function like llStartAnimation().
>>>> Now like any other script, the script when triggered, will run on the server side. (Right ?)
>>>> When the server encounters the animation function the server will send a message to the client asking it to play an
>>>> animation with that UUID
>>>> If the client has an animation with that UUID it will animate the Avatar or NPC with that animation else it will ask
>>>> the server to send the animation and will animate when it receives it.
>>>> If the animation is internal animation and if it is, as you say, part of the client then the client already has it
>>>> and should be able to animate the Avatar/NPC
>>>>
>>>> Sorry to belabor this but it seems I am obviously missing a major concept and would like to figure out what :))
>>>>
>>>> Thanks
>>>> Sat
>>>>
>>>>
>>>> On 3/5/2012 7:55 PM, Gudule Lapointe wrote:
>>>>> Obviously, everything runs on client side, that's the point of a client ;-)
>>>>>
>>>>> I think what was meant is that internal animations are part of the client, not loaded from server.
>>>>>
>>>>> As your NPC is not controlled by a client, it doesn't have these animations at disposal, unless you put them in
>>>>> your script's prim.
>>>>>
>>>>> --
>>>>> http://www.speculoos.net/
>>>>> secondlife://speculoos.net:8002/
>>>>> Speculoos, the belgian cookie-flavored metaverse
>>>>>
>>>>> Le 6 mars 2012 à 02:48, satguru p srivastava a écrit :
>>>>>
>>>>>> Garmin,
>>>>>>
>>>>>> Thanks for pointing out the BVH files.
>>>>>> 121 files!!
>>>>>> A bit of a pain uploading them :)
>>>>>> You also loose the per bone priorites which you get with internal/default animations.
>>>>>> Also I am assuming that user loaded animations are not as efficient as internal ones. Right?
>>>>>>
>>>>>> I am still curious why the internal animations do not play.
>>>>>> As far as I know all animations run on client side.
>>>>>> The triggers for animation can come from client side (example when a users presses a key to make the avatar walk)
>>>>>> or from server side (example when if it is being called from script).
>>>>>> NPCs animations are triggered from scripts.
>>>>>> How is this different from Avatar animations being triggered from scripts ?
>>>>>>
>>>>>> Thanks
>>>>>> Sat
>>>>>>
>>>>>>
>>>>>>
>>>>>> On 3/5/2012 5:34 AM, Garmin Kawaguichi wrote:
>>>>>>> True, Trinity! User Playable Internal Animations are serverside; you cannot use them with NPCs but...
>>>>>>> ... the BVH files corresponding to the Internal Animation are at :
>>>>>>> http://static-secondlife-com.s3.amazonaws.com/downloads/avatar/bvh_files.zip
>>>>>>> as it is specified in the SL Wiki : http://wiki.secondlife.com/wiki/Internal_Animations
>>>>>>> GCI
>>>>>>>
>>>>>>>     ----- Original Message -----
>>>>>>>     *From:* Trinity <mailto:trinity93 at gmail.com>
>>>>>>>     *Sent:* Monday, March 05, 2012 6:58 AM
>>>>>>>     *Subject:* Re: [Opensim-users] NPC and internal Animations
>>>>>>>     Because some animations are built into the viewer and npcs dont use a viewer and perhaps for security
>>>>>>>     reasons. Im not really completely sure to be honest.
>>>>>>>
>>>>>>>
>>>>>>>
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