llMoveToTarget

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/LSL

MoveToTarget

llMoveToTarget

Summary

1 Bug

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 );