Difference between revisions of "LlDetectedVel"

From Second Life Wiki
Jump to navigation Jump to search
m
(Edit example for formatting, improved loop, and to use sensible values for range and arc)
Line 13: Line 13:
<lsl>
<lsl>
//Tells the name and velocity of all near-by avatars.
//Tells the name and velocity of all near-by avatars.
default {
default  
    state_entry() {
{
          llSensor("", "", AGENT, 10000, 10000);
    state_entry()  
    }
    {
    sensor(integer num) {
        // Scan once for avatars within a 96 metre radius sphere
          integer i = 0;
        llSensor("", "", AGENT, 96.0, PI);
          while (i < num) {
    }
              llOwnerSay(llDetectedName(i) + " is moving at " + (string)llVecMag(llDetectedVel(i)) + " m/s.");
    sensor(integer num)  
              ++i;
    {
          }
        // num will initially be 1 or more. When num is 1, the index of the detected avatar will be zero     
    }
        while(num--)  
        {
            llOwnerSay(llDetectedName(num) + " is moving at " + (string)llVecMag(llDetectedVel(i)) + " m/s.");
        }
    }
}
}
</lsl>
</lsl>

Revision as of 05:15, 22 January 2013

Summary

Function: vector llDetectedVel( integer number );
0.0 Forced Delay
10.0 Energy

Returns the vector velocity of detected object or avatar number.

• integer number Index of detection information

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

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> 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]

Examples

<lsl> //Tells the name and velocity of all near-by avatars. default {

   state_entry() 
   {
       // Scan once for avatars within a 96 metre radius sphere
       llSensor("", "", AGENT, 96.0, PI);
   }
   sensor(integer num) 
   {
       // num will initially be 1 or more. When num is 1, the index of the detected avatar will be zero       
       while(num--) 
       {
           llOwnerSay(llDetectedName(num) + " is moving at " + (string)llVecMag(llDetectedVel(i)) + " m/s.");
       }
   }

}

</lsl>

See Also

Articles

•  Detected

Deep Notes

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 vector llDetectedVel( integer number );