Difference between revisions of "LlAvatarOnSitTarget"
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*If the prim lacks a sit target or the avatar is seated upon a different prim, the only way to determine how many and which avatars are seated upon the object is to scan the link set<sup>[[#Notes|1]]</sup>. | *If the prim lacks a sit target or the avatar is seated upon a different prim, the only way to determine how many and which avatars are seated upon the object is to scan the link set<sup>[[#Notes|1]]</sup>. | ||
|spec | |spec | ||
|examples=<lsl> | |examples=<lsl>default | ||
default | |||
{ | { | ||
state_entry() | state_entry() | ||
| Line 24: | Line 23: | ||
} | } | ||
} | } | ||
} | }</lsl> | ||
</lsl> | |helpers=<lsl>//Gets the link number of a seated avatar | ||
|helpers=<lsl> | |||
//Gets the link number of a seated avatar | |||
integer GetAgentLinkNumber(key avatar) | integer GetAgentLinkNumber(key avatar) | ||
{ | { | ||
| Line 36: | Line 33: | ||
if(avatar == linkKey)//is it the avatar we want? | if(avatar == linkKey)//is it the avatar we want? | ||
return linkNum;//It's the avatar we want so return. | return linkNum;//It's the avatar we want so return. | ||
//avatar wasn not found | //avatar wasn't not found | ||
//return a number that isn't a LINK_* flag not a valid link number either. | //return a number that isn't a LINK_* flag not a valid link number either. | ||
return 0x7FFFFFFF;//max int. | return 0x7FFFFFFF;//max int. | ||
}//Written by Strife Onizuka | }//Written by Strife Onizuka</lsl> | ||
</lsl> | |||
|related | |related | ||
|also_tests | |also_tests | ||
Revision as of 13:24, 25 May 2008
| LSL Portal | Functions | Events | Types | Operators | Constants | Flow Control | Script Library | Categorized Library | Tutorials |
Summary
Function: key llAvatarOnSitTarget( );| 239 | Function ID |
| 0.0 | Forced Delay |
| 10.0 | Energy |
Returns a key that is the UUID of the user seated on the prim.
If the prim lacks a sit target or there is no avatar sitting on the prim, then NULL_KEY is returned.
Caveats
- A prim does not have a sit target unless llSitTarget has been called with a nonzero vector as the first argument.
- If the prim lacks a sit target or the avatar is seated upon a different prim, the only way to determine how many and which avatars are seated upon the object is to scan the link set1.
Examples
<lsl>default {
state_entry()
{
// set sit target, otherwise this will not work
llSitTarget(<0.0, 0.0, 0.1>, ZERO_ROTATION);
}
changed(integer change) {
if (change & CHANGED_LINK) {
key av = llAvatarOnSitTarget();
if (av) {//evaluated as true if not NULL_KEY or invalid
llSay(0, "Hello " + llKey2Name(av) + ", thank you for sitting down");
}
}
}
}</lsl>
Useful Snippets
<lsl>//Gets the link number of a seated avatar integer GetAgentLinkNumber(key avatar) {
integer linkNum = 1 + llGetNumberOfPrims();
key linkKey;
//Next we get the linkKey and make sure it's not null, if it's null we are done.
while((linkKey = llGetLinkKey( --linkNum )))//is the key valid?
if(avatar == linkKey)//is it the avatar we want?
return linkNum;//It's the avatar we want so return.
//avatar wasn't not found
//return a number that isn't a LINK_* flag not a valid link number either.
return 0x7FFFFFFF;//max int.
}//Written by Strife Onizuka</lsl>
Notes
- To scan a link set using a function such as llGetLinkKey (see llGetNumberOfPrims#Useful_Snippets for examples).
- The position of an avatar on a sit target can be determined with the use of llGetObjectDetails (see llSitTarget#Useful_Snippets for example).