LlTarget

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Summary

Function: integer llTarget( vector position, float range );

This function is to have the script know when it has reached a position.
It registers a position with a range that triggers at_target and not_at_target events continuously until unregistered.
Returns a handle (an integer) to unregister the target with llTargetRemove.

• vector position position in region coordinates
• float range

A similar function exists for rotations: llRotTarget
This function does not move the object, to do that use llSetPos or llMoveToTarget.

Caveats

  • The position always references the current region. If you set llTarget to <100, 100, 100> while in Region A and then move the object to region B, the target automatically becomes <100, 100, 100> in Region B.
  • The position can be set outside the region boundaries, but at_target can only happen if the range extends into the current region. The part of the range outside the current region will not activate at_target.
  • Only 8 targets can be active to a script. Additional llTarget will remove the oldest target set.
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Examples

integer target_id;
vector target_pos;
 
default
{
    state_entry()
    {
        target_pos = llGetPos() + <1.0, 0.0, 0.0>;
        target_id = llTarget(target_pos, 0.5);
    }
    at_target(integer tnum, vector targetpos, vector ourpos)
    {
        if (tnum == target_id)
        {
            llOwnerSay("object is within range of target");
            llOwnerSay("target position: " + (string)targetpos + ", object is now at: " + (string)ourpos);
            llOwnerSay("this is " + (string)llVecDist(targetpos, ourpos) + " meters from the target");
            llTargetRemove(target_id);
        }
    }
    not_at_target()
    {
        llOwnerSay(
            "not there yet - object is at " + (string)llGetPos() + 
            ", which is " + (string)llVecDist(target_pos, llGetPos()) + 
            " meters from the target (" + (string)target_pos + ")"
        );
    }
}

See Also

Events

• at_target not_at_target positional target events
• at_rot_target not_at_rot_target rotational target events

Functions

•  llTargetRemove Cancel a target position
•  llRotTarget Register a target rotation
•  llRotTargetRemove Cancel a target rotation

Deep Notes

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Signature

function integer llTarget( vector position, float range );