NS2的LEACH仿真出来的nam文件拓扑的节点为什么x=0，且y=0

_{查看.tr文件和.nam发文件下所有的节点的x，y值都是（0，0），nam图像更没有运行出来}

于是我将
if { $opt(sc) == "" } {
puts "*** NOTE: no scenario file specified."
set opt(sc) "none"
} else {
puts "Loading scenario file..."
source $opt(sc)
puts "Load complete..."
}
几行代码移动到：initial_node_pos调用方法之前，解决了节点位置为0的问题，但是nam仿真时又出现了没有数据的问题，且一按开始动画时间进度条就会变成空白，又是一个问题，这又是为什么呢？

仔细对比wireless.tcl 文件发现是由于仿真结束后将两行代码注释掉了：

proc stop {} {
    global ns_ nam_vystup
    $ns_ flush-trace    
    close $nam_vystup
    #exec nam out_aodv_big_auto.nam &
    #exit 0    
}

这两行代码注释了导致nam没有数据收发，具体原因我也不知道为什么，只是浅薄的知道时这两行代码有问题

将这两行代码的注释去掉后，nam动画正常了

以下是我的wireless.tcl代码：

set opt(chan)        Channel/WirelessChannel
set opt(prop)        Propagation/TwoRayGround
#set opt(netif)        NetIf/SharedMedia
set opt(netif)        Phy/WirelessPhy
#set opt(mac)        Mac/802_11
set opt(mac)        Mac/802_11
set opt(ifq)        Queue/DropTail/PriQueue
set opt(ll)        LL
set opt(ant)            Antenna/OmniAntenna

set opt(x)        670    ;# X dimension of the topography
set opt(y)        670        ;# Y dimension of the topography
#set opt(cp)        "../mobility/scene/cbr-50-20-4-512" ;# connection pattern file
set opt(cp)        ""
set opt(sc)        "../mobility/scene/scen-670x670-50-600-20-2" ;# scenario file

set opt(ifqlen)        50        ;# max packet in ifq
set opt(nn)        101        ;# number of nodes
set opt(seed)        0.0
set opt(stop)        50.0        ;# simulation time
set opt(tr)        out.tr        ;# trace file
set opt(rp)             dsdv            ;# routing protocol script
set opt(lm)             "on"           ;# log movement

# ======================================================================

set AgentTrace            ON
set RouterTrace            ON
set MacTrace            OFF

LL set mindelay_        50us
LL set delay_            25us
LL set bandwidth_        0    ;# not used
LL set off_prune_        0    ;# not used
LL set off_CtrMcast_        0    ;# not used

Agent/Null set sport_        0
Agent/Null set dport_        0

Agent/CBR set sport_        0
Agent/CBR set dport_        0

Agent/TCPSink set sport_    0
Agent/TCPSink set dport_    0

Agent/TCP set sport_        0
Agent/TCP set dport_        0
Agent/TCP set packetSize_    1460

Queue/DropTail/PriQueue set Prefer_Routing_Protocols    1

# unity gain, omni-directional antennas
# set up the antennas to be centered in the node and 1.5 meters above it
Antenna/OmniAntenna set X_ 0
Antenna/OmniAntenna set Y_ 0
Antenna/OmniAntenna set Z_ 1.5
Antenna/OmniAntenna set Gt_ 1.0
Antenna/OmniAntenna set Gr_ 1.0

# Initialize the SharedMedia interface with parameters to make
# it work like the 914MHz Lucent WaveLAN DSSS radio interface
Phy/WirelessPhy set CPThresh_ 10.0
Phy/WirelessPhy set CSThresh_ 1.559e-11
Phy/WirelessPhy set RXThresh_ 3.652e-10
Phy/WirelessPhy set Rb_ 2*1e6
Phy/WirelessPhy set Pt_ 0.2818
Phy/WirelessPhy set freq_ 914e+6
Phy/WirelessPhy set L_ 1.0

# ======================================================================

proc usage { argv0 }  {
    puts "Usage: $argv0"
    puts "\tmandatory arguments:"
    puts "\t\t\[-x MAXX\] \[-y MAXY\]"
    puts "\toptional arguments:"
    puts "\t\t\[-cp conn pattern\] \[-sc scenario\] \[-nn nodes\]"
    puts "\t\t\[-seed seed\] \[-stop sec\] \[-tr tracefile\]\n"
}

proc getopt {argc argv} {
    global opt
    lappend optlist cp nn seed sc stop tr x y

    for {set i 0} {$i < $argc} {incr i} {
        set arg [lindex $argv $i]
        if {[string range $arg 0 0] != "-"} continue

        set name [string range $arg 1 end]
        set opt($name) [lindex $argv [expr $i+1]]
    }
}

proc cmu-trace { ttype atype node } {
    global ns_ tracefd

    if { $tracefd == "" } {
        return ""
    }
    set T [new CMUTrace/$ttype $atype]
    $T target [$ns_ set nullAgent_]
    $T attach $tracefd
        $T set src_ [$node id]

        $T node $node

    return $T
}

proc create-god { nodes } {
    global ns_ god_ tracefd

    set god_ [new God]
    $god_ num_nodes $nodes
}

proc log-movement {} {
    global logtimer ns_ ns

    set ns $ns_
    source tcl/mobility/timer.tcl
    Class LogTimer -superclass Timer
    LogTimer instproc timeout {} {
    global opt node_;
    for {set i 0} {$i < $opt(nn)} {incr i} {
        $node_($i) log-movement
    }
    $self sched 0.1
    }

    set logtimer [new LogTimer]
    $logtimer sched 0.1
}

# ======================================================================
# Main Program
# ======================================================================
getopt $argc $argv

#
# Source External TCL Scripts
#
source tcl/lib/ns-mobilenode.tcl

#if { $opt(rp) != "" } {
    source tcl/mobility/$opt(rp).tcl
    #} elseif { [catch { set env(NS_PROTO_SCRIPT) } ] == 1 } {
    #puts "\nenvironment variable NS_PROTO_SCRIPT not set!\n"
    #exit
#} else {
    #puts "\n*** using script $env(NS_PROTO_SCRIPT)\n\n";
        #source $env(NS_PROTO_SCRIPT)
#}
source tcl/lib/ns-cmutrace.tcl

# do the get opt again incase the routing protocol file added some more
# options to look for
getopt $argc $argv

if { $opt(x) == 0 || $opt(y) == 0 } {
    usage $argv0
    exit 1
}

if {$opt(seed) > 0} {
    puts "Seeding Random number generator with $opt(seed)\n"
    ns-random $opt(seed)
}
#
# Initialize Global Variables
#
set ns_        [new Simulator]
set chan    [new $opt(chan)]
set prop    [new $opt(prop)]
set topo    [new Topography]

# setup output trace file
#set tracefd    [open $opt(rp).tr w]
#set tracefd    [open leach.tr w]
set tracefd    [open $opt(tr) w]

# try for setup output nam file
set nam_vystup        [open $opt(rp).nam w]
$ns_ trace-all $tracefd          
$ns_ namtrace-all-wireless $nam_vystup $opt(x) $opt(y)
# end

$topo load_flatgrid $opt(x) $opt(y)

$prop topography $topo

#
# Create God
#
create-god $opt(nn)

$ns_ node-config -adhocRouting $opt(rp) \
      -llType $opt(ll) \
      -macType $opt(mac) \
      -ifqType $opt(ifq) \
      -ifqLen $opt(ifqlen) \
      -antType $opt(ant) \
      -propType $opt(prop) \
      -phyType $opt(netif) \
      -channel $opt(chan) \
       -topoInstance $topo \
      -agentTrace ON \
      -routerTrace ON \
      -macTrace ON \
      -wiredRouting OFF

#
# log the mobile nodes movements if desired
#
if { $opt(lm) == "on" } {
    log-movement
}

#
#  Create the specified number of nodes $opt(nn) and "attach" them
#  the channel.
#  Each routing protocol script is expected to have defined a proc
#  create-mobile-node that builds a mobile node and inserts it into the
#  array global $node_($i)
#

if { [string compare $opt(rp) "dsr"] == 0} {
    for {set i 0} {$i < $opt(nn) } {incr i} {
        dsr-create-mobile-node $i
    }
} elseif { [string compare $opt(rp) "dsdv"] == 0} {
    for {set i 0} {$i < $opt(nn) } {incr i} {
        dsdv-create-mobile-node $i
    }
} elseif { [string compare $opt(rp) "leach"] == 0} {
    for {set i 0} {$i < $opt(nn) } {incr i} {
        leach-create-mobile-node $i
    }
} elseif { [string compare $opt(rp) "leach-c"] == 0} {
    for {set i 0} {$i < $opt(nn) } {incr i} {
        leach-create-mobile-node $i
    }
} elseif { [string compare $opt(rp) "stat-clus"] == 0} {
    for {set i 0} {$i < $opt(nn) } {incr i} {
        leach-create-mobile-node $i
    }
} elseif { [string compare $opt(rp) "mte"] == 0} {
    for {set i 0} {$i < $opt(nn) } {incr i} {
        leach-create-mobile-node $i
    }
} elseif { [string compare $opt(rp) "pegasis"] == 0} {
    for {set i 0} {$i < $opt(nn) } {incr i} {
        leach-create-mobile-node $i
    }
}

#
# Source the Connection and Movement scripts
#
if { $opt(cp) == "" } {
    puts "*** NOTE: no connection pattern specified. - wireless.tcl"
        set opt(cp) "none"
} else {
    puts "Loading connection pattern...- wireless.tcl"
    source $opt(cp)
}

#
# Tell all the nodes when the simulation ends
#
for {set i 0} {$i < $opt(nn) } {incr i} {
    $ns_ at $opt(stop).000000001 "$node_($i) reset";
}

# original end $ns_ at $opt(stop).00000001 "puts \"NS EXITING...\" ; $ns_ halt"

# new end
$ns_ at $opt(stop).0001 "stop"
$ns_ at $opt(stop).000000002 "puts \"NS EXITING...\" ; $ns_ halt"

# Change for stop
proc stop {} {
    global ns_ nam_vystup
    $ns_ flush-trace    
    close $nam_vystup
    exec nam out_aodv_big_auto.nam &
    exit 0    
}
# end of change
if { $opt(sc) == "" } {
    puts "*** NOTE: no scenario file specified. - wireless.tcl"
        set opt(sc) "none"
} else {
    puts "Loading scenario file... - wireless.tcl"
    source $opt(sc)
    puts "Load complete... - wireless.tcl"
}

for {set i 0} {$i < $opt(nn)} {incr i} {
    $ns_ initial_node_pos $node_($i) 6
}

puts $tracefd "M 0.0 nn $opt(nn) x $opt(x) y $opt(y) rp $opt(rp)"
puts $tracefd "M 0.0 sc $opt(sc) cp $opt(cp) seed $opt(seed)"
puts $tracefd "M 0.0 prop $opt(prop) ant $opt(ant)"

puts "Starting Simulation... - wireless.tcl"
$ns_ run