Hello Kavan,
Thanks alot for the reply.
I haven't tried it yet because of a complication with NS2 (it aint
cleaning any of the .o files). Ill try it soon.
One question, in God::IsNeighbor function, a constant called RANGE is
used do have any idea where it is being defined !?
Thanks alot,
Mathiew :D
Quoting kavan sheth <shethka...@gmail.com>:
> Hi Mathiew
>
> I needed to the same in my project.
> what I did is used god object.
> you can study and you can do many more things using it .
> here I am just describing what I did:
>
> I added following function in ns-2.33/mobile/god.cc (you will need to add
> declaration in god.h)
>
> double God::getdistance(int i,int k)
>
> {
>
> double x1=mb_node[i]->X();
>
> double y1=mb_node[i]->Y();
>
> double x2=mb_node[k]->X();
>
> double y2=mb_node[k]->Y();
>
> double distance;
>
> distance=sqrt(((x1-x2)*(x1-x2))+((y1-y2)*(y1-y2)));
>
> return distance;
>
> }
> then I was able to get distance between two nodes by writing following code
> in c++
>
>
> *God::instance()->getdistance(i,k); // i and k are the id of the nodes*
>
> you will also need to include following statements in your .tcl file
>
> 1 after creating topography
>
> set topo [new Topography]
> $topo load_flatgrid $val(x) $val(y)
>
> *set god_ [create-god $val(nn)]*
>
> 2. when you are dynamically creating nodes
>
> for { set i 0 } { $i < $val(nn) } { incr i } {
> set node_($i) [$ns_ node $i]
> $node_($i) random-motion 0 ;# disable random motion
> *$god_ new_node $node_($i)
> *}
>
> following is a function of my agent for your reference:
>
> void Manetconf::neighbors(int i)
> {
> int nodes=God::instance()->nodes();
> cout<<"neighbors of node "<<i<<":"<<endl;
> for(int k=0;k<nodes;k++)
> {
> if(k!=i)
> {
> if(God::instance()->IsNeighbor(i,k))
> cout<<k<<":"<<God::instance()->getdistance(i,k)<<" yes"<<endl;
> else
> cout<<k<<":"<<God::instance()->getdistance(i,k)<<" no"<<endl;
> }
> }
> cout<<endl;
> }
>
>
>
>
>
> cheers
>
> Kavan
>
> On Mon, Jan 26, 2009 at 1:28 PM, Mathiew Moussa <mm...@aub.edu.lb> wrote:
>
>>
>>
>> Hello Walid,
>>
>> Thanks for replying.
>> Here's the deal : im trying to simulate a WSN with nodes that are not
>> mobile.
>> In a topology.tcl file i have the nodes coordinates stored in the
>> following form:
>>
>> $node_(0) set X_ 60
>> $node_(0) set Y_ 0
>> $node_(0) set Z_ 0
>> $node_(1) set X_ 92
>> $node_(1) set Y_ 43
>> $node_(1) set Z_ 0 ...
>>
>> Although i have these coordinates in the tcl files i still need to
>> access them in C++, the reason is because i wanted to find distances
>> between nodes as well as whether some nodes lied in the range of other
>> (so its a couple of loops in C++)
>>
>> so id need something that look like this:
>>
>> for(i=0 ; i<numbNodes; i++)
>> for (j=0 ; j<numNodes; j++)
>> if(nodes[i].x == nodes[j].x) //just a stupid example
>> (...)
>>
>> My algorithm is centralized at the base station.. over there i have
>> the freedom to access the coordinates of the nodes from topology.tcl,
>> the question is how ?
>>
>> I hope this is enough.
>> Thanks again.
>> Mathiew
>>
>>
>>
>>
>> Quoting Waleed Tuffaha <tuff...@gmail.com>:
>> > Hello Mathiew,
>> >
>> > Sorry for the late reply. I guess it would be best if you can explain a
>> > little what you are trying to do. Is every node trying to find its
>> > coordinates only ?
>> >
>> > On Thu, Jan 22, 2009 at 11:48 AM, Mathiew Moussa <mm...@aub.edu.lb>
>> wrote:
>> >
>> >> Hello Walid,
>> >>
>> >> Thanks for the reply.
>> >>
>> >> You said getting the coordinates from the TCL file easier... i have them
>> >> stored in a topography.tcl file (or so i recall) that has the X Y Z
>> >> coordinates of each sensor.
>> >>
>> >> So what's the way to get them from the TCL file directly to be used in
>> C++
>> >> ??
>> >>
>> >> Thanks alot,
>> >> Mathiew
>> >>
>> >>
>> >>
>> >>
>> >> Quoting Waleed Tuffaha <tuff...@gmail.com>:
>> >>
>> >> Hello Mathiew,
>> >>>
>> >>> ( Note that I didn't test this ! )
>> >>>
>> >>> The "Node class" uses a "Location class" in which the X,Y,Z variables
>> are
>> >>> defined. The "mobilenode class" inherits from the node class.
>> >>>
>> >>> So, if node_ is a pointer to a mobilenode, then you should be able to
>> get
>> >>> the coordinates using:
>> >>> int x,y,z;
>> >>> node_->location_->getLocation(&x, &y, &z)
>> >>>
>> >>> So if you have an array containing pointers to all the nodes then you
>> can
>> >>> loop on the array and get the coordinates for each node.
>> >>>
>> >>> I think that getting the coordinates from Tcl is easier, but I don't
>> know
>> >>> what exactly you are doing.
>> >>>
>> >>> Hope this helps
>> >>> -- Waleed
>> >>>
>> >>> On Thu, Jan 22, 2009 at 9:59 AM, Mathiew Moussa <mm...@aub.edu.lb>
>> wrote:
>> >>>
>> >>>
>> >>>> Dear NS Users,
>> >>>>
>> >>>> Can someone please tell me how you can retrieve the coordinates of the
>> >>>> network nodes from a TCL file into C++.
>> >>>> So is their some loop or something that can be written in C++ and
>> >>>> traverses all the nodes and gets X, Y, & Z, and how is it written.
>> >>>>
>> >>>>
>> >>>> Hope you can help me.
>> >>>> Thanks,
>> >>>> Mathiew
>> >>>>
>> >>>>
>> >>>>
>> >>>
>> >>
>> >>
>> >>
>> >
>> >
>> > --
>> > Waleed Tuffaha.
>> >
>>
>>
>>
>>
>>
>
