Difference between revisions of "LlDetectedPos"

From Second Life Wiki
Jump to navigation Jump to search
m
(Start with a simple focussed example)
 
(3 intermediate revisions by 3 users not shown)
Line 1: Line 1:
{{LSL_Function/detected|number|pos|error=[[ZERO_VECTOR|<0.0, 0.0, 0.0>]]}}{{LSL_Function
{{LSL_Function
|inject-2={{LSL_Function/detected|number|pos|error=[[ZERO_VECTOR|<0.0, 0.0, 0.0>]]}}
|func_id=35|func_sleep=0.0|func_energy=10.0
|func_id=35|func_sleep=0.0|func_energy=10.0
|sort=DetectedPos|func=llDetectedPos
|sort=DetectedPos|func=llDetectedPos
Line 11: Line 12:
|constants
|constants
|examples=
|examples=
<lsl>//--// get sim position of Avatars in "say" range //--//


//-- @@ = Contains code optimizations, see the following page for details
<source lang="lsl2">// Get position and distance of toucher
//-- https://wiki.secondlife.com/wiki/User:Void_Singer/Optimizations


default
default
{
{
  state_entry()
    touch_start(integer total_number)
  {
    {
    llOwnerSay( "Touch me to get the positions of avatars in 'Say' range" );
// get the position of the avatar touching this prim
  }
vector pos = llDetectedPos(0);
// compute how far away they are
float dist = llVecDist(pos, llGetPos() );
llSay(0, "You are " + (string) dist + " metres from me, at coordinates " + (string) pos);
    }
}</source>
 
<source lang="lsl2">// get name and sim position of Avatars within "say" range
 
default
{
    state_entry()
    {
        llOwnerSay( "Touch me to get the positions of avatars in 'Say' range" );
    }


  touch_start( integer vIntTouchCount )
    touch_start( integer vIntTouchCount )
  {
    {
    //-- trigger the sensor for avatars within 20m
        // Do a one-off sensor sweep over a 20m radius sphere for avatars
    llSensor( "", "", AGENT, 20, PI );
        llSensor( "", "", AGENT, 20, PI );
  }
    }


  sensor( integer vIntFound )
    sensor( integer vIntFound )
  {
    integer vIntCounter = 0;
    //-- loop through all avatars found
    do
     {
     {
      llOwnerSay( llDetectedName( vIntCounter )
        integer vIntCounter = 0;
                  + " @ "
        //-- loop through all avatars found
                  //-- the next line gets the position of each found avatar
        do
                  + (string)llDetectedPos( vIntCounter ) );
        {
    }while (++vIntCounter < vIntFound); //-- @@
            llOwnerSay( llDetectedName( vIntCounter )
  }
                // get the position of this detected avatar
                + (string) llDetectedPos( vIntCounter ) );
        } while (++vIntCounter < vIntFound);  
    }


  //-- sensor does not detect owner if it's attached
    // sensor does not detect owner if it's attached
  no_sensor()
    no_sensor()
  {
    {
    llOwnerSay( "I couldn't find anybody" );
        llOwnerSay( "I couldn't find anybody" );
  }
    }
}</lsl>
}</source>
|helpers
|helpers
|also_functions
|also_functions

Latest revision as of 14:50, 17 January 2016

Summary

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

Returns a vector that is the position (in region coordinates) of detected object 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.

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

// Get position and distance of toucher

default
{
    touch_start(integer total_number)
    {
	// get the position of the avatar touching this prim
	vector pos = llDetectedPos(0);
		
	// compute how far away they are
	float dist = llVecDist(pos, llGetPos() );
		
	llSay(0, "You are " + (string) dist + " metres from me, at coordinates " + (string) pos);
    }
}
// get name and sim position of Avatars within "say" range

default
{
    state_entry()
    {
        llOwnerSay( "Touch me to get the positions of avatars in 'Say' range" );
    }

    touch_start( integer vIntTouchCount )
    {
        // Do a one-off sensor sweep over a 20m radius sphere for avatars
        llSensor( "", "", AGENT, 20, PI );
    }

    sensor( integer vIntFound )
    {
        integer vIntCounter = 0;
        //-- loop through all avatars found
        do
        {
            llOwnerSay( llDetectedName( vIntCounter )
                // get the position of this detected avatar
                + (string) llDetectedPos( vIntCounter ) );
        } while (++vIntCounter < vIntFound); 
    }

    // sensor does not detect owner if it's attached
    no_sensor()
    {
        llOwnerSay( "I couldn't find anybody" );
    }
}

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 llDetectedPos( integer number );