we can draw state of the system as a png now.

Makefile

@@ -1,7 +1,7 @@
 all: compile
 
-compile: main.o actor.o SchellingActor.o
-	/usr/local/cuda/bin/nvcc -arch sm_20 main.o actor.o SchellingActor.o -o ActorSim
+compile: main.o actor.o SchellingActor.o lodepng.o
+	/usr/local/cuda/bin/nvcc -arch sm_20 main.o actor.o SchellingActor.o lodepng.o -o ActorSim
 
 main.o: main.cu
 	/usr/local/cuda/bin/nvcc -arch sm_20 -c -dc main.cu
@@ -12,5 +12,8 @@ actor.o: actor.cu
 SchellingActor.o: SchellingActor.cu
 	/usr/local/cuda/bin/nvcc -arch sm_20 -c -dc SchellingActor.cu
 
+lodepng.o: lodepng.cpp
+	gcc -c lodepng.cpp
+
 clean:
 	rm -rf *o

SchellingActor.cu

@@ -1,26 +1,29 @@
 #include "SchellingActor.hxx"
 #include <cstdio>
 
-__device__ __host__ SchellingActor::SchellingActor(unsigned char type){
-	m_type = type;
-}
+__device__ __host__ SchellingActor::SchellingActor(unsigned char type)
+  : m_type(type), m_numberAdjacent(0) {};
 
 __device__ __host__ SchellingActor::~SchellingActor(){
-  printf("SchellingActor constructor\n");
 }
 
 __device__ void SchellingActor::react() {
-  printf("SchellingActor react()\n");
+  //printf("SchellingActor react()\n");
 	for (int i = 1; i < 257; i <<= 1) {
-		if (atomicXor((int*)&m_type, i) >> i - 1 == 0)
+		if (atomicXor((int*)&m_type, i) >> i - 1 == 0) {
 			increaseNumberAdjacent();
+    }
 	}
 }
 
 __device__ void SchellingActor::send(Actor* receiver, char message) {
-  printf("SchellingActor send()\n");
-  if (message != 'f' && message != static_cast<SchellingActor*>(receiver)->type())
-  	  //static_cast<SchellingActor*>(receiver)->increaseNumberAdjacent();
-  	  this->increaseNumberAdjacent();
-}
+  //printf("SchellingActor send()\n");
+  if (receiver == NULL) {
+    return;
+  }
 
+  message = this->type();
+  if (message != 'f' && message != static_cast<SchellingActor*>(receiver)->type()) {
+  	this->increaseNumberAdjacent();
+  }
+}

SchellingActor.hxx

@@ -13,13 +13,13 @@ class SchellingActor : public Actor {
 		__device__ void receive(Actor*, unsigned char);
 		// ! Used to run after the actor receives all of its data. Reacts by sending the MapActor its coordinates and type.
 		__device__ virtual void react();
-    	
+
 		__device__ __host__ unsigned char type() { return m_type; }
 
 		__device__ __host__ unsigned int numberAdjacent() { return m_numberAdjacent; }
 
-    	__device__ virtual void send(Actor* receiver, char message);
-		
+    __device__ virtual void send(Actor* receiver, char message);
+
 		__device__ void increaseNumberAdjacent() { atomicAdd(&m_numberAdjacent, 1); }
 		// Used to increase the number of adjacent actors
 		// Used to reset the number of adjacent actors

actor.cu

@@ -6,7 +6,7 @@
 #include "actor.h"
 
 Actor::Actor(){
-	m_id = -1;
+	m_id = 0;
 }
 
 Actor::Actor(unsigned int id){