diff --git a/NumberGenerator.h b/NumberGenerator.h
index 92861f7..6cb6d7a 100644
--- a/NumberGenerator.h
+++ b/NumberGenerator.h
@@ -1,12 +1,60 @@
-#include "Point.h"
-
 #include <list>
 #include <cstdlib>  // for srand, rand
+#include <fstream> // ifstream
+#include <ctime> // time
 
 class NumberGenerator
 {
 public:
-    static std::list<Point> get_random_numbers(int valCount)
+    static std::list<Point> generate_numbers(const int count, const int mode = 1)
+    {
+        if (mode == 1)
+        {
+            return get_random_numbers(count);
+        }
+        else if (mode == 2)
+        {
+            return NumberGenerator::get_rectangle_numbers(count);
+        }
+        else if (mode == 3)
+        {
+            return NumberGenerator::get_circle_numbers(count);
+        }
+        else throw "unspecified rng Mode"; // TODO: could handle in parse args
+    }
+
+    static std::list<Point> read_numbers(const std::string &fileRnd)
+    {
+        std::list<Point> points;
+        std::ifstream in(fileRnd.c_str());
+        if (in.is_open())
+        {
+            std::string line;
+            std::getline(in, line); // get first line for explizit valueCount
+            int valCount = std::stoi(line);
+            float x = 0;
+            float y = 0;
+            for (int i = 0; i < valCount; ++i)
+            {
+                getline(in, line);
+                //getline(in, line, ','); // could also be used slightly different but includes newlines :/
+                size_t pos = line.find(',');
+                if (pos != std::string::npos)
+                {
+                    x = std::stof(line.substr(0, pos));
+                    y = std::stof(line.substr(pos + 1));
+                    points.push_back(Point(x, y));
+                }
+                else
+                {
+                    throw "invalid format!";
+                }
+            }
+        }
+        return points;
+    }
+
+    static std::list<Point> get_random_numbers (const int valCount)
     {
         std::list<Point> points;
 
@@ -26,7 +74,7 @@ public:
         return points;
     }
 
-    static std::list<Point> get_rectangle_numbers(int valCount)
+    static std::list<Point> get_rectangle_numbers (const int valCount)
     {
         std::list<Point> points;
 
@@ -45,7 +93,7 @@ public:
         return points;
     }
 
-    static std::list<Point> get_circle_numbers(int valCount)
+    static std::list<Point> get_circle_numbers (const int valCount)
     {
         std::list<Point> points;
 
@@ -61,7 +109,6 @@ public:
 
             points.push_back(Point(x, y));
         }
-
         return points;
     }
 };
\ No newline at end of file
diff --git a/Quickhull.h b/Quickhull.h
index 4b76fbb..109a8be 100644
--- a/Quickhull.h
+++ b/Quickhull.h
@@ -7,7 +7,7 @@
 #include <iostream>
 
 #include "Display.h"
-#include "Point.h"
+//#include "Point.h"
 //#include "Line.h"
 #include "Triangle.h"
 
diff --git a/main.cpp b/main.cpp
index 02d42c0..8382b46 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,10 +1,7 @@
 #include <iostream> // cin, cout
-#include <fstream> // ifstream
-#include <cstdlib> // srand, rand
-#include <ctime> // time
 #include <cstring> // strcmp
-#include <vector> // TODO: or use arrays for maximum performance?
-#include <list> // TODO: replace vector with list for easier insertion!
+#include <vector>
+#include <list> // TODO: replace vector in Display with list for easier insertion!
 
 #include "Display.h"
 #include "NumberGenerator.h"
@@ -26,7 +23,7 @@ int main (int argc, char **argv)
     // -stepsize <size>     time between autosteps; if 0 or not provided -> manual steps
     // TODO: care a little more <3
     int stepSize = 0;
-    int valCount = 1000000;
+    int valCount = 100;
     int rngMode = 1;
     std::string fileRnd = "";
     bool vis = false;
@@ -34,67 +31,30 @@ int main (int argc, char **argv)
     for (int i = 0; i < argc; ++i)
     {
         if (strcmp(argv[i], "-v") == 0) vis = true;
-        else if (strcmp(argv[i], "-akl") == 0) akl = true;
-        else if (strcmp(argv[i], "-stepsize") == 0) stepSize = std::stoi(argv[i + 1]);
+        else if (strcmp(argv[i], "--akl") == 0) akl = true;
+        else if (strcmp(argv[i], "--stepsize") == 0) stepSize = std::stoi(argv[i + 1]);
         else if (strcmp(argv[i], "-f") == 0) fileRnd = argv[i + 1];
-        else if (strcmp(argv[i], "-rngCount") == 0) valCount = std::stoi(argv[i + 1]);
-        else if (strcmp(argv[i], "-rngMode") == 0) rngMode = std::stoi(argv[i + 1]);
+        else if (strcmp(argv[i], "--rngcount") == 0) valCount = std::stoi(argv[i + 1]);
+        else if (strcmp(argv[i], "--rngmode") == 0) rngMode = std::stoi(argv[i + 1]);
     }
 
     std::list<Point> points;
     if (fileRnd.empty()) // generate random numbers
     {
         std::cout << "generating " << valCount << " random numbers for mode " << rngMode << "..." << std::endl;
-        if (rngMode == 1)
-        {
-            points = NumberGenerator::get_random_numbers(valCount);
-        }
-        else if (rngMode == 2)
-        {
-            points = NumberGenerator::get_rectangle_numbers(valCount);
-        }
-        else if (rngMode == 3)
-        {
-            points = NumberGenerator::get_circle_numbers(valCount);
-        }
-        else throw "unspecified rng Mode"; // TODO: could handle in parse args
+        points = NumberGenerator::generate_numbers(valCount, rngMode);
     }
-    // TODO: move into NumberGenerator?
     else // read random numbers
     {
         std::cout << "reading random numbers from file: " << fileRnd << "..." << std::endl;
-        std::ifstream in(fileRnd.c_str());
-        if (in.is_open())
-        {
-            std::string line;
-            std::getline(in, line); // get first line for explizit valueCount
-            valCount = std::stoi(line);
-            float x = 0;
-            float y = 0;
-            for (int i = 0; i < valCount; ++i)
-            {
-                getline(in, line);
-                //getline(in, line, ','); // could also be used slightly different but includes newlines :/
-                size_t pos = line.find(',');
-                if (pos != std::string::npos)
-                {
-                    x = std::stof(line.substr(0, pos));
-                    y = std::stof(line.substr(pos + 1));
-                    points.push_back(Point(x, y));
-                }
-                else
-                {
-                    throw "invalid format!";
-                }
-            }
-        }
+        points = NumberGenerator::read_numbers(fileRnd);
     }
 
 #ifdef _DEBUG
-    /*for (Point& pt : points)
+    for (Point& pt : points)
     {
         std::cout << "pt: " << pt.x() << ", " << pt.y() << std::endl;
-    }*/
+    }
 #endif
 
     // TEST to check SFML coordinate system