Description

Returns the parent node of a given node.

The index of the parent node of a specified node is calculated as being:

$\text{index(parent node)} = | \frac{\text{index(specified node)}-1}{2} |$

Code

This script was tested and works on OpenSim version 0.7.5!

///////////////////////////////////////////////////////////////////////////
//    Copyright (C) 2013 Wizardry and Steamworks - License: GNU GPLv3    //
///////////////////////////////////////////////////////////////////////////
string wasBinaryTreeParent(list BT, string node) {
    // Parent child: | \frac{i-1}{2} |
    integer i = llListFindList(BT, (list)node);
    if(i == -1) return "";
    i = (i-1)/2;
    if(i < 0) i *= -1;
    return llList2String(BT, i);
}