LlDetectedRot

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/LSL

DetectedRot

llDetectedRot

Summary

Function: rotation llDetectedRot( integer number );

38	Function ID
0.0	Forced Delay
10.0	Energy

Returns the rotation of detected object number.

• integer

number

–

Index of detection information

number does not support negative indexes. Returns <0.0, 0.0, 0.0, 1.0> if number is not valid sensed object.

Specification

llDetected* functions only work if called from within Detection events (collision, collision_start, collision_end, sensor, touch, touch_start, touch_end) or in functions called by Detection events. They will fail silently and return unusable values if called during other events.

Caveats

• If number is out of bounds this function returns <0.0, 0.0, 0.0, 1.0> and the script continues to execute without an error message.
• Events that enable the llDetected* functions always return at least one detected item.
  • Detection events are not raised if there is nothing detected.^[1]
  • The detection event's items detected parameter is initially never less than 1.^[2]

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Examples

//--// get compass facing of Avatar that touches this object //--//

 //-- list of compass directions starting at East, rotated clockwise
list gLstCompassPoints = [ "East", "NorthEast", "North", "NorthWest", "West", "SouthWest", "South", "SouthEast" ];

 //-- convert rotation to z-axis compass direction
string CompassDirection( rotation rRotBase )
{
  integer iCountCompassPoints = llGetListLength(gLstCompassPoints);
   //-- convert rotation to a direction
  vector vDirection = <0.0, 1.0, 0.0> / rRotBase;
   //-- take the direction and determine the z rotation
  float fAngle = llAtan2(vDirection.x, vDirection.y);
   //-- take the angle and find the compass point
  integer iCompassPoint = llRound(fAngle * iCountCompassPoints / TWO_PI);
   //-- convert to string
  return llList2String( gLstCompassPoints, iCompassPoint );
}

default{
  state_entry()
  {
    llSay( 0, "Touch me to get your compass facing" );
  }

  touch_start( integer vIntTouchCount )
  {
    integer vIntCounter = 0;
    do
    {
      llSay( 0,
             llDetectedName( vIntCounter )
             + " is facing "
              //-- next line gets avatar rotation and converts to compass direction
             + CompassDirection( llDetectedRot( vIntCounter ) ) );
    } while ( ++vIntCounter < vIntTouchCount );
  }
}

See Also

Articles

•

Detected

Deep Notes

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Footnotes

1. ^ The exception is no_sensor but it doesn't enable llDetected* functions.
2. ^ Like all event parameters, the user can overwrite the initial value.

Signature
function rotation llDetectedRot( integer number );