Difference between revisions of "LlDetectedGrab"

From Second Life Wiki
Jump to navigation Jump to search
m
Line 1: Line 1:
{{LSL_Function/detected|number|grab|simple=*}}{{LSL_Function
{{LSL_Function/detected|number|grab|error=[[ZERO_VECTOR|<0.0, 0.0, 0.0>]]}}{{LSL_Function
|func_id=37|func_sleep=0.0|func_energy=10.0
|func_id=37|func_sleep=0.0|func_energy=10.0
|sort=DetectedGrab|func=llDetectedGrab
|sort=DetectedGrab|func=llDetectedGrab

Revision as of 23:11, 9 April 2010

Summary

Function: vector llDetectedGrab( integer number );

Returns a vector that is the grab offset of the user touching the object; only works in the touch event.

• integer number Index of detection information

number does not support negative indexes. Returns <0.0, 0.0, 0.0> if number is out of range or if called from an event other than the touch event.

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]
All Issues ~ Search JIRA for related Bugs

Examples

<lsl> default {

   state_entry()
   {
       llSetStatus(PRIM_PHYSICS,TRUE);//This allows the object to be "grabbed" and dragged
   }
   touch(integer num_detected)
   {
       llSay(0,(string)llDetectedGrab(0));//Be prepared for a great amount of chatted info.
                                          //The faster you move the mouse while grabbing the object the greater the offset becomes.
                                          //This is not due to the speed but the reaction time of the turn around of the physical prim,
                                          //thus an offset (distance from grab to prim center) is created and measured by this function.
   }

}

</lsl>

See Also

Events

•  touch_start
•  touch
•  touch_end

Functions

•  llPassTouches
•  llSetStatus - STATUS_BLOCK_GRAB Enable / Disable object grabbing

Articles

•  Detected
•  Grab

Deep Notes

Search JIRA for related Issues

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 llDetectedGrab( integer number );