llGround / llWater Rezzer / Mover Help =)

I been trying to get this so it rezzes the object on the ground and on water but also if there is an object like a prim-platform it stops also. Cant seem to get it to work with the prim part. Help Please =)

FindGroundOrWater()
{
    float fHeight = llGround( ZERO_VECTOR);
    float fWaterLevel = llWater( ZERO_VECTOR );
    if( fHeight < fWaterLevel )
        fHeight = fWaterLevel;
    vector vTarget = llGetPos();
 
    //llSetPos can only move 10m at a time.
    integer iCounter = 1 + llAbs((integer)(vTarget.z - fHeight) / 10);
    vTarget.z = fHeight;
    do
        llSetPos( vTarget +<0,0,1.85> );
    while( --iCounter );
}
string partone;
string parttwo;
 
default
{
    on_rez(integer total_number)
    {
        FindGroundOrWater();
    }
    state_entry()
    {
        llListen(-2665985,"","","");
    }
    
    listen(integer channel, string name, key id, string message)
    {
        
        partone = llGetSubString(message, 0, 35);
        if(partone == llGetOwner())
        {
                parttwo = llGetSubString(message, 37, 40);
                if(parttwo == "die")
                {
                   llDie();
                }
        }
     }
}
                        
/
CODE

Not sure how you'd find a prim near the water.. Maybe make your object physical and let it drop until it gets to the water height, land height or collides with something?

For moving on the code you have now, you can do this (which is not even compliled, let alone tested) instead..

vector vTarget = llGetPos();
vTarget.z = fHeight;

while (llVecDist (vTarget, llGetPos()) > 0.1)
{
llSetPos (vTarget);
}

I cant use physical becuase the object is 60 prims

Or maybe a lil help with Rez hight that works off Avatars hight? I couldnt seem to figure this out so I went onto the llGround & water instead.