How to get an Av to sit at...

Hi!

I need to sit an AV at a distance of the prim containing the script which is half of the AV's height.

To get the height of the Av I use llGetAgentSize, the problem is that I declare llSitTarget in the state_entry() and then in a changed event I use llAvatarOnSitTarget to get the AV's key and so getting its height. But this doesn't work. I mean this:

  vector AVheight;
  default
  {
  	state_entry()
  	{
  		llSitTarget(<0.0, 0.0, AVheight.z>, <0,0,rotation.z + (90 * DEG_TO_RAD),1>);
  	}
  	changed(integer change) 
  	{
  		if (change & CHANGED_LINK)
  		{
  		key agent = llAvatarOnSitTarget();
  		AVheight = llGetAgentSize(agent)/2;  
   		}
  	}
  }
  

This doesn't work I know but how can I get the llSitTarget to know the z value of the vector? If I declare the llSitTarget in the changed event it doesn't work...

I don't want to use touch_start or a sensor

Thanks.

Well, I haven't had to be picky about sit targets to the point of needing to change them constantly, but your's is a difficult problem.

The reason being is that you cannot change a sit target after an AV has already sat down and have it adjust where they are sitting at.

I do, however, believe that you could use the GetAgentSize to llSetLinkPrimitiveParams and move the Prim they're sitting on based off the offset.

this is probably the best work-around I've been able to find. Also, with the new found llSetLinkPrimitiveParameters, you may be able to adjust the avatar's position with this command since it is considered a linked prim when it's sitting on an object.

Do you mean llSetPrimitiveParams ?

and using it like this, after AVheight = llGetAgentSize(agent)/2;

 
  llSetPrimitiveParams([PRIM_POSITION, llGetLocalPos() + <0.0, 0.0,AVheight.z >]);
  

No there's a new command llSetLinkPrimitiveParams That allows you to adjust the properties of a child prim just like you would with llSetPrimitiveParams. since an avatar sitting on an object is linked to it and considered a child prim by the linkset, llSetLinkPrimitiveParams may be useful for adjusting the position/rotation of the avatar. I do not have acess to SL at this time so I cannot experiment with it to give you definate uses.


[edit]

You'd have to calculate the link number of the avatar while it's sitting, but I think it's one less than the total number of prims in the link set when the avatar is sitting on it.

llSetLinkPrimitiveParams(llGetNumberOfPrims() - 1 , [PRIM_POSITION, llGetLocalPos() + <0.0, 0.0,AVheight.z >])

is the code I'm thinking would apply

The avatar's link number is equal to the total number of prims in the linkset, since the root prim is #1, not #0 (0 being reserved as the link number for a single, unlinked prim).

i have resolved this problem in some builds by having the avatar touch the object first. in the touch event use llGetAgentSize(llDetectedKey(0)) to get their size and save it as a vector and reset the sit target to reflect this, then when they sit it is where you want.

In my case the avatar doesn't touch the prim first.