查看“LlDetectedTouchST”的源代码

{{LSL Header|ml=*}}{{LSLC|Keywords}}{{LSLC|Flow Control}}{{LSLC|}}


{{函数详情
|函数名 = Function: vector llDetectedTouchST( integer index );
|参数= 参数：integer index–Index of detection information index does not support negative indexes.
|返回值= 返回值：Returns a vector that is the surface coordinates for where the prim was touched. The x & y vector positions contain the horizontal (s) & vertical (t) face coordinates respectively (<s, t, 0.0>). Each component is usually in the interval [0.0, 1.0] with the origin in the bottom left corner.[1] With some mesh objects, values of less than 0.0 and higher than 1.0 have been observed.


|注意事项=
注意事项
*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.
***To check if face touch detection is supported check the return of llDetectedTouchFace.
**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.

|示例=
示例1
<pre>
default
{
    touch_start(integer total_number)
    {
        integer touchFace = llDetectedTouchFace(0);
        vector  touchST   = llDetectedTouchST(0);
 
//      ZERO_VECTOR (<0.0, 0.0, 0.0> ... the origin) is in the bottom left corner of the face
//      touchST.x goes across the face from the left to the right
//      touchST.y goes up the face from the bottom to the top
 
        if (touchFace == -1)
            llWhisper(PUBLIC_CHANNEL, "Sorry, your viewer doesn't support touched faces.");
        else if (touchST == TOUCH_INVALID_TEXCOORD)
            llWhisper(PUBLIC_CHANNEL, "Sorry, the touch position upon the face could not be determined.");
        else
            llSay(PUBLIC_CHANNEL, "llDetectedTouchST(0) = " + (string)touchST
                    + "\ntouchST.x = " + (string)touchST.x
                    + "\ntouchST.y = " + (string)touchST.y);
    }
}
</pre>

示例2
<pre>
integer numberOfRows    = 12;
integer numberOfColumns = 12;
 
default
{
    touch_start(integer total_number)
    {
        vector  touchST     = llDetectedTouchST(0);
 
//      ZERO_VECTOR (<0.0, 0.0, 0.0> ... the origin) is in the bottom left corner of the face
//      touchST.x goes across the face from the left to the right
//      touchST.y goes up the face from the bottom to the top
 
        integer columnIndex = (integer) (touchST.x * numberOfColumns);
        integer rowIndex    = (integer) (touchST.y * numberOfRows);
        integer cellIndex   = (rowIndex * numberOfColumns) + columnIndex;
 
        llSay(PUBLIC_CHANNEL, "ST grid (" + (string)columnIndex + ", " + (string)rowIndex
                            + ") --> cell " + (string)cellIndex);
    }
}
</pre>

示例3
<pre>
//  with friendly permission of Supremius Maximus
//  who made the texture used in this script
//
//  click&hold the mouse while dragging across
//  the face of the prim
default
{
    touch(integer num_detected)
    {
        integer link    = llDetectedLinkNumber(0);
        integer face    = llDetectedTouchFace(0);
        vector  touchST = llDetectedTouchST(0);
 
//      ZERO_VECTOR (<0.0, 0.0, 0.0> ... the origin) is in the bottom left corner of the face
//      touchST.x goes across the face from the left to the right
//      touchST.y goes across the face from the bottom to the top
 
        string uuid = "23badbe7-6d8c-639b-0131-bb321f8e9db5";
 
        llSetLinkPrimitiveParamsFast(link, [
            PRIM_TEXTURE, face, uuid, <1.0, 1.0, 0.0>, touchST, 0,
            PRIM_FULLBRIGHT, ALL_SIDES, TRUE]);
    }
}
</pre>


|相关函数=
[[llDetectedLinkNumber]]
[[llDetectedTouchFace]]		
[[llDetectedTouchUV]]		
[[llDetectedTouchPos]]			
[[llDetectedTouchNormal]]			
[[llDetectedTouchBinormal]]			


|相关事件=
[[touch_start]]		
[[touch]]	
[[touch_end]]			

}}