lineSegment script

// The code below is made for use with
// SCRATCH FOR SECOND LIFE (S4SL)
// alpha release July 14, 2008
//
// by Eric Rosenbaum (ericr@media.mit.edu)
// MIT Media Lab
// Lifelong Kindergarten group
//
// S4SL is available for free from
// http://web.mit.edu/~eric_r/Public/S4SL/
//
// S4SL is a modified version of Scratch,
// a graphical programming language for kids
// see scratch.mit.edu

integer myID;

vector hueToRGB(float h)
{
    integer i;
    float f;
    float p;
    float q;
    float t;
    float r;
    float g;
    float b;
    float s = 1;
    float v = 1;
    h *= 5;            // sector 0 to 5
    i = llFloor(h);
    f = h - i;            // factorial part of h
    p = v * ( 1 - s );
    q = v * ( 1 - s * f );
    t = v * ( 1 - s * ( 1 - f ) );

    if (i == 0) {
            r = v;
            g = t;
            b = p;
    } else if (i == 1) {
            r = q;
            g = v;
            b = p;
     } else if (i == 2) {
            r = p;
            g = v;
            b = t;
    } else if (i == 3) {
            r = p;
            g = q;
            b = v;
    } else if (i == 4) {
            r = t;
            g = p;
            b = v;
    } else {
            r = v;
            g = p;
            b = q;
    }
    return <r,g,b>;
}
setColor(float color)
{
      llSetColor(hueToRGB(color / 100), ALL_SIDES);
}
startListening() {
    llListen(1, "", "", "");
}
default
{
    state_entry()
    {
    }
    on_rez(integer start_param)
    {
        myID = start_param;
        startListening();
    }
    listen(integer channel, string name, key id, string msg)
    {
        if (msg == "clear") {
            llDie();
        }
        integer indexOfColon = llSubStringIndex(msg, ":");
        integer IDreceived = (integer)llGetSubString(msg, 0, indexOfColon-1);
        if (IDreceived == myID)
        {
            msg = llGetSubString(msg,indexOfColon+1, -1);
            indexOfColon = llSubStringIndex(msg, ":");
            string command = llToLower(llGetSubString(msg,0,indexOfColon-1));
            if(command == "set length")
            {
                indexOfColon = llSubStringIndex(msg, ":");
                float length = (float)llGetSubString(msg,indexOfColon+1,-1);
                llSetScale(<length,.1,.1>);
            }
            if(command == "set color")
            {
                indexOfColon = llSubStringIndex(msg, ":");
                float color = (float)llGetSubString(msg,indexOfColon+1,-1);
                setColor(color);
            }
        }
    }
}