Difference between revisions of "LlMoveToTarget"
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{{LSL Function/damping|tau}}{{ | {{LSL_Function | ||
|inject-2= | |||
{{Issues/SVC-2441}} | |||
{{LSL Function/physical|avatar=*}} | |||
{{LSL Function/damping|tau}} | |||
{{LSL Function/position|target|region=*}} | |||
|func_id=70|func_sleep=0.0|func_energy=10.0 | |func_id=70|func_sleep=0.0|func_energy=10.0 | ||
|func=llMoveToTarget | |func=llMoveToTarget | ||
|p1_type=vector|p1_name=target | |p1_type=vector|p1_name=target | ||
|p2_type=float|p2_name=tau | |p2_type=float|p2_name=tau | ||
|func_footnote=To stop the object from maintaining the | |func_footnote=To stop the object from maintaining the {{LSLP|target}} positions use [[llStopMoveToTarget]]<br/> | ||
To change the rotation in the same manner use [[llLookAt]] or [[llRotLookAt]]. | To change the rotation in the same manner use [[llLookAt]] or [[llRotLookAt]]. | ||
|func_desc=Critically damp to | |func_desc=Critically damp to {{LSLP|target}} in {{LSLP|tau}} seconds (if the script is physical) | ||
|return_text | |return_text | ||
|spec | |spec | ||
|caveats | |caveats=* When slowly moving to a lower Z value, beware of {{jira|SVC-2441}} - the sim will incorrectly move the object down faster than it should. That is, if you try moving to llGetPos() + <10, 10, -10>, you can end up at .z-10 several meters before getting to .x-10 and .y-10. There is a demo object in the JIRA which shows this effect. | ||
* A llMoveToTarget call seems to persist even if physics is turned off. This is a useful trick on sluggish sims where the object can drop a bit between the call to enable physics and the call to llMoveToTarget - just do the llMoveToTarget before setting the object to physical. | |||
* <code>[[llVecDist]]([[llGetPos]](), {{LSLPT|target}})</code> must be ''less than'' 65, or no movement will occur. | |||
* Calling llMoveToTarget with a {{LSLP|tau}} of {{HoverText|0.0|zero}} or less will silently fail, and do nothing. The smallest functional {{LSLP|tau}} is 0.044444444 (two physics frames, 2/45). | |||
|constants | |constants | ||
|examples=Drop this script in a prim to have it follow the prim owner. | |examples=Drop this script in a prim to have it follow the prim owner. | ||
< | <source lang="lsl2"> | ||
default | default | ||
{ | { | ||
| Line 29: | Line 37: | ||
// Get position of detected owner | // Get position of detected owner | ||
vector pos = llDetectedPos(0); | vector pos = llDetectedPos(0); | ||
// Offset back one | // Offset back one meter in X and up one meter in Z based on world coordinates. | ||
vector offset =<-1,0,1>; | vector offset =<-1,0,1>; | ||
// offset = offset*llDetectedRot(0); //Adding this line will orient the follower relative to the owner's position. | |||
pos+=offset; | pos+=offset; | ||
llMoveToTarget(pos,0.4); | llMoveToTarget(pos,0.4); | ||
} | } | ||
} | } | ||
</ | </source> | ||
|helpers | |helpers | ||
|also_functions={{LSL DefineRow||[[llStopMoveToTarget]]}} | |also_functions={{LSL DefineRow||[[llStopMoveToTarget]]}} | ||
Latest revision as of 13:00, 22 January 2015
| LSL Portal | Functions | Events | Types | Operators | Constants | Flow Control | Script Library | Categorized Library | Tutorials |
Summary
Function: llMoveToTarget( vector target, float tau );
| 0.0 | Forced Delay |
| 10.0 | Energy |
Critically damp to target in tau seconds (if the script is physical)
| • vector | target | – | position in region coordinates | |
| • float | tau | – | seconds to critically damp in |
To stop the object from maintaining the target positions use llStopMoveToTarget
To change the rotation in the same manner use llLookAt or llRotLookAt.
Caveats
- Only works in attachments and physics-enabled objects.
- When slowly moving to a lower Z value, beware of SVC-2441 - the sim will incorrectly move the object down faster than it should. That is, if you try moving to llGetPos() + <10, 10, -10>, you can end up at .z-10 several meters before getting to .x-10 and .y-10. There is a demo object in the JIRA which shows this effect.
- A llMoveToTarget call seems to persist even if physics is turned off. This is a useful trick on sluggish sims where the object can drop a bit between the call to enable physics and the call to llMoveToTarget - just do the llMoveToTarget before setting the object to physical.
llVecDist(llGetPos(), target)must be less than 65, or no movement will occur.- Calling llMoveToTarget with a tau of 0.0 or less will silently fail, and do nothing. The smallest functional tau is 0.044444444 (two physics frames, 2/45).
Examples
Drop this script in a prim to have it follow the prim owner.
default
{
state_entry()
{
vector pos = llGetPos();
llSetStatus(STATUS_PHYSICS, TRUE);
// Little pause to allow server to make potentially large linked object physical.
llSleep(0.1);
llMoveToTarget(pos,0.4);
// Look for owner within 20 meters in 360 degree arc every 1 seconds.
llSensorRepeat("", llGetOwner(), AGENT, 20.0, PI,1.0);
}
sensor(integer total_number)
{
// Get position of detected owner
vector pos = llDetectedPos(0);
// Offset back one meter in X and up one meter in Z based on world coordinates.
vector offset =<-1,0,1>;
// offset = offset*llDetectedRot(0); //Adding this line will orient the follower relative to the owner's position.
pos+=offset;
llMoveToTarget(pos,0.4);
}
}
See Also
Functions
| • | llStopMoveToTarget | |||
| • | llLookAt | |||
| • | llRotLookAt | |||
| • | llTarget |
Deep Notes
Signature |
|---|
function void llMoveToTarget( vector target, float tau ); |