Difference between revisions of "LlDetectedTouchUV"

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m (Edited the specification to note the variability of the vector components' intervals depending on face texture repeat values.)
m
Line 21: Line 21:
default
default
{
{
     touch_start(integer UV_detected)
     touch_start(integer num_detected)
     {
     {
         integer i = 0;
         // PUBLIC_CHANNEL has the integer value 0
         for(; i<UV_detected; ++i)
 
             llWhisper(0, "UV clicked: " + (string)llDetectedTouchUV(i));
         llWhisper(PUBLIC_CHANNEL,
             "UV clicked: " + (string)llDetectedTouchUV(0));
     }
     }
}
}
Line 32: Line 33:
default
default
{
{
     touch_start(integer total_number)
     touch_start(integer num_detected)
     {
     {
         vector UV = llDetectedTouchUV(0);
         vector UV = llDetectedTouchUV(0);
         float U = UV.x;
         float U = UV.x;
         float V = UV.y;
         float V = UV.y;
         // Now you can report U and V separately, or you can compare them separately with IF statements.
         // Now you can report U and V separately, or you can compare them separately with IF statements.
         // You of course do not need to store the vector components to separate variables,
         // You of course do not need to store the vector components to separate variables,
         // you can access them from the vector that used as an intermediate, like this:
         // you can access them from the vector that used as an intermediate, like this:
        // llSay(0, (string) UV.x);


        // PUBLIC_CHANNEL has the integer value 0
        llSay(PUBLIC_CHANNEL, "UV.x: " + (string)U);
        llSay(PUBLIC_CHANNEL, "UV.y: " + (string)V);
     }
     }
}
}

Revision as of 07:50, 23 September 2012

Summary

Function: vector llDetectedTouchUV( integer index );

Returns a vector that is the texture coordinates for where the prim was touched. The x & y vector positions contain the u & v texture coordinates respectively (<u, v, 0.0>). Like llDetectedTouchST, the interval of each component will be [0.0, 1.0] unless the texture repeats are set to a non-default value. Increasing or decreasing the texture repeats of the face will change this interval accordingly.

TOUCH_INVALID_TEXCOORD is returned when the touch UV coordinates cannot be determined. See Caveats for further details.

• integer index – Index of detection information

index does not support negative indexes. For the touch category of events only. The prim that was touched may not be the prim receiving the event, use llDetectedLinkNumber to check for this; likewise you can use llDetectedTouchFace to determine which face was touched.

Caveats

  • If index is out of bounds the script continues to execute without an error message.
  • TOUCH_INVALID_TEXCOORD is returned when...
    • The avatar's viewer does not support face touch detection.
    • The touch has moved off the surface of the prim.
    • The touch happened too close to the edge of the face to determine a location.
    • The event triggered is not a touch event.
All Issues ~ Search JIRA for related Bugs

Examples

<lsl> default { 

   touch_start(integer num_detected)
   {
       // PUBLIC_CHANNEL has the integer value 0

       llWhisper(PUBLIC_CHANNEL,
           "UV clicked: " + (string)llDetectedTouchUV(0));
   }

} </lsl> <lsl> default { 

   touch_start(integer num_detected)
   {
       vector UV = llDetectedTouchUV(0);

       float U = UV.x;
       float V = UV.y;

       // Now you can report U and V separately, or you can compare them separately with IF statements.
       // You of course do not need to store the vector components to separate variables,
       // you can access them from the vector that used as an intermediate, like this:

       // PUBLIC_CHANNEL has the integer value 0
       llSay(PUBLIC_CHANNEL, "UV.x: " + (string)U);
       llSay(PUBLIC_CHANNEL, "UV.y: " + (string)V);
   }

}

</lsl>

See Also

Deep Notes

History

Search JIRA for related Issues

Footnotes

  1. ^ The ranges in this article are written in Interval Notation.

Signature

function vector llDetectedTouchUV( integer index );
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