LlLinkSitTarget

Wiki description

Set the sit location for the linked prim(s). The sit location is relative to the prim's position and rotation.

Function notes

If offset == <0.0, 0.0, 0.0> then the sit target is removed.

Specification

llLinkSitTarget sets the position for the Agent Target (Develop -> Avatar -> Display Agent Target in the version 3.x viewer, Develop -> Character -> View Agent Target in older viewers). The position of the target is based on rot and the offset^{It is widely considered that the rot should not affect the position, unfortunately the sit target code is a lava-flow. ~ SVC-2277}.

Caveats

link needs to be LINK_THIS for an unlinked prim. Specifying LINK_ROOT (integer value 1) will not work.
Once a sit target is removed llAvatarOnLinkSitTarget will only return NULL_KEY.
Removing or deactivating the script that sets the sit target will not remove the prim's sit target.
- Sit target is a prim property and not dependent on a script for its continued existence.
To remove sit target, use the following:

:

llLinkSitTarget(linkNum, ZERO_VECTOR, ZERO_ROTATION);

There is no way to remove the Sit option from the pie menu. It will appear to be removed if the llSetSitText is set to a space " " or similar transparent string.
Attachments cannot be sat upon (see SVC-6100 to vote for such a feature).
rot affects the position of the sit-target in a buggy way. To correct for the rot bug, subtract <0.0, 0.0, 0.4> from the position when rot is zero. See example in llSitTarget. This offset is <0.0, 0.0, 0.418> on OpenSimulator 0.7.6 (it's 0.4 on version 0.8), but there is more to it than just this offset (opensim and SL remain incompatible). You can find the gory details and an example here.
- llSetLinkPrimitiveParams is a more difficult workaround.
- Animations are relative to the Agent Target, but the Agent Target isn't described by the animation.
llSitTarget does not update position of an already seated avatar. See UpdateSitTarget for a way to do this.
offset is limited to 300.0 meters on each axis. The x, y and z components must be in the range [-300, 300.0]Footnote: {{Footnote|handle=interval}}.
- If they are outside the acceptable range they are rounded to the closest limit.
If an object has multiple seats (each seat has a script that sets a sit target with llSitTarget, or the link set has a script that assigns several llLinkSitTargets), the following method determines which sit target an avatar ends up at:
- If the prim that is clicked on has a sit target and that sit target is not full, that sit target is used.
- If the prim that is clicked on has no sit target, and one or more other linked prims have sit targets that are not full, the sit target of the prim with the lowest link number will be used.

History

Date of Release 10/08/2011

Shared wiki helpers

The original page also injects shared parameter notes, caveats or issue information through these helpers. Their conditional MediaWiki logic is not reproduced here; inspect the preserved helper source for additional material.

Template:LSL Function/link

Original shared helper source (conditional wiki logic is not evaluated)

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!Description
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{{!}} {{LSL Const|LINK_ROOT|integer|1|c={{{verb|refers to}}} the root prim in a multi-prim linked set}}
{{!}} {{#var:value}}
{{!}} {{{verb|refers to}}} the [[Link#Root_Prim|root]] prim in a multi-prim linked set{{Footnote|handle=LINK_ROOT|LINK_ROOT does not work on single [[prim]] [[object|objects]]. Unless there is an avatar sitting on the [[object]].}}
{{#if:{{{nogroup|}}}||{{!}}-
{{!}} {{LSL Const|LINK_SET|integer|-1|c={{{verb|refers to}}} all prims}}
{{!}} {{#var:value}}
{{!}} {{#var:comment}}
{{!}}-
{{!}} {{LSL Const|LINK_ALL_OTHERS|integer|-2|c={{{verb|refers to}}} all other prims}}
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{{!}} {{{verb|refers to}}} all children, (everything but the [[Link#Root_Prim|root]])}}
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{{!}} {{{verb|refers to}}} the [[prim]] the [[script]] is in
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{{#vardefine:p_{{{1|}}}_desc|[[Link]] number ({{#if:{{{nounlinked|}}}||0: {{HoverText|unlinked|When an object is made up of only one prim, and there are no avatars seated upon it, the link number of the (root) prim is zero.}},&#32;}}1: {{HoverText|[[Link#Root_Prim|root]] prim|When an object is made up of multiple prims or there is an avatar seated upon the object, the root prim's link number is one}}, &gt;1: child prims{{#if:{{{noavatar|}}}||&#32;and {{HoverText|seated avatars|Avatars sitting on objects are assigned link numbers. They are always greater than prim link numbers.}}}}) {{#if:{{{nlf|}}}||or a <code>LINK_*</code> [[flag]]}}{{{2|}}}&#32;}}
{{#vardefine:p_{{{1|}}}_hover|Link number ({{#if:{{{nounlinked|}}}||0: unlinked,&#32;}}1: root prim, &gt;1: child prims{{#if:{{{noavatar|}}}||&#32;and seated avatars}}) {{#if:{{{nlf|}}}||or a LINK_* flag}}{{#if:{{{3|}}}|{{{3|}}}|{{{2|}}}}}&#32;}}

{{#if:{{{nocaveats|}}}||{{#if:{{{noavatar|}}}|
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*{{LSLP|{{{1|}}}}} needs to be either an actual [[llGetLinkNumber|link number]] or a link constants that equate to a single prim, such as [[LINK_ROOT]] and [[LINK_THIS]].
**[[LINK_SET]], [[LINK_ALL_CHILDREN]] and [[LINK_ALL_OTHERS]] will not work.
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<h3>Link Numbers</h3>
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 [[prim|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 ([[Link#Root_Prim|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 [[Link#Root_Prim|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 [[llUnSit|unseating]] all avatars first.
<h4>Counting Prims & Avatars</h4>
There are two functions of interest when trying to find the number of prims and avatars on an object.
* <code>[[llGetNumberOfPrims]]()</code> - Returns the number of [[prim|prims]] and seated avatars.
* <code>[[llGetObjectPrimCount]]([[llGetKey]]())</code> - Returns only the number of [[prim|prims]] in the [[object]] but will return zero for attachments.

<syntaxhighlight lang="lsl2">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.
}</syntaxhighlight>See [[llGetNumberOfPrims]] for more about counting prims and avatars.

<h4>Errata</h4>
If a script located in a [[Link#Child_Prim|child]] prim erroneously attempts to access link 0, it will get or set the property of the linkset's [[Link#Root_Prim|root]] prim.  This bug ({{jira|BUG-5049}}) is preserved for broken legacy scripts. {{PBR}}
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{{LSL DefineRow||[[llGetLinkNumber]]|Returns the link number of the [[prim]] the script is in.}}}}
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