is_laying_flat

integer is_laying_flat(float threshold)
{
    vector zero = llRot2Euler(ZERO_ROTATION);
    vector this = llRot2Euler(llGetRot());
    zero.z = this.z;
    if (llVecDist(zero, this) < threshold)
    {
        return TRUE;
    }
    return FALSE;
}
default
{
    touch_start(integer total_number)
    {
        float fThreshold = 0.2;
        if ( is_laying_flat(fThreshold) )
        {
            llSay(0, "is flat");
        }
    }
}