Template:LSL Function/link

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#var value
p__desc Link number (0: unlinked, 1: root prim, >1: child prims and seated avatars) or a LINK_* flag
also_functions
•  llGetLinkNumber Returns the link number of the prim the script is in.
constants_nb
Flag Description
LINK_ROOT 1 sends to the root prim in a multi-prim linked set[1]
LINK_SET -1 sends to all prims
LINK_ALL_OTHERS -2 sends to all other prims
Flag Description
LINK_ALL_CHILDREN -3 sends to all children, (everything but the root)
LINK_THIS -4 sends to the prim the script is in
notes

Link Numbers

Each prim that makes up an object has an address, a link number. To access a specific prim in the object, the prim's link number must be known. In addition to prims having link numbers, avatars seated upon the object do as well.

  • If an object consists of only one prim, and there are no avatars seated upon it, the (root) prim's link number is zero.
  • However, if the object is made up of multiple prims or there is an avatar seated upon the object, the root prim's link number is one.

When an avatar sits on an object, it is added to the end of the link set and will have the largest link number. In addition to this, while an avatar is seated upon an object, the object is unable to link or unlink prims without unseating all avatars first.

Counting Prims & Avatars

There are two functions of interest when trying to find the number of prims and avatars on an object.

<lsl>integer GetPrimCount() { //always returns only the number of prims

   if(llGetAttached())//Is it attached?
       return llGetNumberOfPrims();//returns avatars and prims but attachments can't be sat on.
   return llGetObjectPrimCount(llGetKey());//returns only prims but won't work on attachments.

}</lsl>See llGetNumberOfPrims for more about counting prims and avatars.