diff --git a/Attractor.cpp b/Attractor.cpp
index 21a2abb..1dc49a5 100644
--- a/Attractor.cpp
+++ b/Attractor.cpp
@@ -1,98 +1,91 @@
-#include <cmath>
-#include <iostream>
-#include <fstream>
-#include <cstdlib>
-#include <iomanip>
-#include <cassert>
-#include <string>
-using namespace std;
-
 #include "Attractor.hpp"
-
+using namespace std;
 
 /*
     Constructors & initialisers
 */
-Attractor::Attractor():
-        dim(3), par(4), formula(LORENZ), param(NULL), point(NULL), new_point(NULL) {
-    // Default attractor: 3D Lorenz attrractor
+Attractor::Attractor() {
 
-    param[0] = 0.001;       //dt
-    param[1] = 10;          //sigma
-    param[2] = 28;          //rho
-    param[3] = 8.0/3.0;     //beta
+    myAttractor = new Lorenz3D();
 
 }
 
-Attractor::Attractor(const char* const filename) {
-    ifstream file(filename);
+Attractor::Attractor(const char* const fileName) {
+    ifstream file(fileName);
 
-    cout << "Reading file " << filename << "..." << endl;
+    cout << "Reading file " << fileName << "..." << endl;
 
     if ( !file ) {
-        cout << " Error reading file '" << filename << "' dying now..." << endl;
+        cerr << " Error reading file '" << fileName << "' dying now..." << endl;
         exit(2);
     }
 
     // TODO : Use stfu
 
-    /*
-        file.attr:
-            lorenz
-            3
-            0
-
-            3.24454
-            1.25
-            ....
-    */
+    stfu::node system;
+    system.read(file);
+    stfu::node attractor = system.getChild("attractor");
 
-    string fileFormula;
-    file >> fileFormula;
+    string attractorType = attractor.getValue("type");
+    const string attractorDimension = attractor.getValue("dimensions");
 
-    for ( unsigned int i = 0; fileFormula[i] != '\0'; i++ ) {
-        fileFormula[i] = tolower(fileFormula[i]);
+    for ( unsigned int i = 0; attractorType[i] != '\0'; i++ ) {
+        attractorType[i] = tolower(attractorType[i]);
     }
+    const unsigned int dimension = atoi(attractorDimension.c_str());
+
+    cout << " Formula: " << attractorType << endl;
+    cout << " Dimensions: " << dimension << endl;
 
-    unsigned int fileDim;
-    file >> fileDim;
-
-    unsigned int fileOrde;
-    file >> fileOrde;
-
-    cout << " Formula: " << fileFormula << endl;
-    cout << " Dimensions: " << fileDim << endl;
-    cout << " Orde: " << fileOrde << endl;
-
-    if ( fileFormula == "lorenz" )
-        init(fileDim, LORENZ, fileOrde);
-    else if ( fileFormula == "poly_n" )
-        init(fileDim, POLY_N, fileOrde);
-    else if ( fileFormula == "poly_a" )
-        init(fileDim, POLY_A, fileOrde);
-    else if ( fileFormula == "logistic" )
-        init(fileDim, LOGISTIC, fileOrde);
-    else if ( fileFormula == "unravel" )
-        init(fileDim, UNRAVEL, fileOrde);
-    else {
-        cout << " Formula not (yet) supported" << endl;
+    if ( attractorType == "lorenz" ){
+        if ( dimension == 3 ) {
+            myAttractor = new Lorenz3D();
+        } else {
+            cerr << "something wrong";
+            exit(37);
+        }
+    } else if ( attractorType == "polynomial" ) {
+        const string attractorOrde = attractor.getValue("orde");
+        const unsigned int orde = atoi(attractorOrde.c_str());
+        cout << " Orde: " << orde << endl;
+        myAttractor = new Polynomial(dimension, orde);
+
+    } else if ( attractorType == "polynomial a" ) {
+        if ( dimension == 3 ) {
+            myAttractor = new PolynomialA3D();
+        } else {
+            cerr << "something wrong";
+            exit(37);
+        }
+    } else if ( attractorType == "logistic" ) {
+        myAttractor = new Logistic(dimension);
+
+    } else if ( attractorType == "unravel" ) {
+        if ( dimension == 3 ) {
+            myAttractor = new Unravel3D();
+        } else {
+            cerr << "somtheing wrong";
+            exit(37);
+        }
+    } else {
+        cout << "'" << attractorType << "' not recognized" << endl;
         exit(3);
     }
 
-    for ( unsigned int i = 0; i < par; i++ ) {
-        file >> param[i];
-        cout << " Parameter " << i << " set to " << param[i] << ",  ";
+    unsigned int numberOfParameters = myAttractor->getNumberOfParameters();
+    double * & parameters = myAttractor->parameters();
+
+    for ( unsigned int i = 0; i < numberOfParameters; i++ ) {
+        stfu::node attractorParameters = attractor.getChild("parameters");
+        parameters[i] = atof(attractorParameters.getValue(i).c_str());
+        cout << " Parameter " << i << " set to " << parameters[i] << ",  ";
     }
 
     cout << endl << " Reading file complete" << endl;
 }
 
-void Attractor::init(unsigned int dim_in, FormulaChoice formula_in, unsigned int orde_in) {
-
-}
-
 void Attractor::init_range() {
-
+/*
     // stabilize attractor
     for ( unsigned int i = 0; i < 100000; i++ ) {
         iterate();
@@ -125,6 +118,7 @@ void Attractor::init_range() {
     for ( vector<Projector*>::iterator it = projectors.begin(); it != projectors.end(); it++ ) {
         (*it)->finish_range();
     }
+*/
 }
 
 bool Attractor::is_chaos() {
@@ -134,10 +128,10 @@ bool Attractor::is_chaos() {
             Single point attractor
             Lyapunov exponent
     */
-
+/*
     double sum = 0;
     for ( unsigned int i = 0; i < dim; i++ ) {
-        const double dist = new_point[i] - point[i];
+        const double dist = 0; //new_point[i] - point[i];
         sum += dist*dist;
     }
     if ( sum >= 1.0e7 ) {
@@ -149,17 +143,17 @@ bool Attractor::is_chaos() {
         return false;
     }
     return true;
+*/
+    return true;
 }
 
-/*
-    Iteration & Math
-*/
 void Attractor::iterate() {
-    // attractorKernel->iterate()
+    myAttractor->iterate();
 }
 
 void Attractor::plot() {
     for ( vector<Projector *>::iterator it = projectors.begin(); it != projectors.end(); it++ ) {
+        const double * point = myAttractor->vector();
         (*it)->plot(point);
     }
 }
@@ -169,8 +163,13 @@ void Attractor::plot() {
     IO & control
 */
 void Attractor::output() {
-    for ( unsigned int i = 0; i < dim; i++ ) {
+    const unsigned int* dim = (unsigned int*)myAttractor->getProperty("dimension");
+    const double * point = myAttractor->vector();
+
+    for ( unsigned int i = 0; i < *dim; i++ ) {
         cout << point[i] << " ";
     }
     cout << endl;
+
+    delete dim;
 }
diff --git a/Attractor.hpp b/Attractor.hpp
index d6da8c4..76d0bc9 100644
--- a/Attractor.hpp
+++ b/Attractor.hpp
@@ -1,16 +1,21 @@
 #ifndef ATTRACTOR_HPP
 #define ATTRACTOR_HPP
 
+#include <iostream>
+#include <fstream>
+#include <cstdlib>
+#include <string>
 #include <vector>
 
-//#include "Vector.hpp"
-//#include "Parameters.hpp"
+#include "stfu/stf.hpp"
 #include "Projector.hpp"
 #include "AttractorKernel.hpp"
 
-enum FormulaChoice {
-    POLY_N, LORENZ, POLY_A, POLY_2, LOGISTIC, UNRAVEL
-};
+#include "kernels/Logistic.hpp"
+#include "kernels/Lorenz3D.hpp"
+#include "kernels/Polynomial.hpp"
+#include "kernels/PolynomialA3D.hpp"
+#include "kernels/Unravel3D.hpp"
 
 class Projector;
 
@@ -18,23 +23,16 @@ class Projector;
 
 class Attractor {
 public:
-    unsigned int dim;
-    unsigned int par;
-    unsigned int orde;
-    FormulaChoice formula;
-
-    double * param;
-    double * point;
-    double * new_point;
 
+    AttractorKernel * myAttractor;
 
-    vector<Projector *> projectors;
+    std::vector<Projector *> projectors;
 
     public:
     Attractor();
     Attractor(const char* const filename);
 
-    void init(unsigned int dimensions, FormulaChoice formula, unsigned int orde);
+    //void init(unsigned int dimensions, FormulaChoice formula, unsigned int orde);
 
 
     void init_range();
@@ -42,8 +40,6 @@ public:
     // TODO : lyapunov exponent uit rekenen
     bool is_chaos();
 
-
-    // TODO : optimaliseren voor lage graads veeltermen
     void iterate();
 
     void plot();
diff --git a/AttractorKernel.hpp b/AttractorKernel.hpp
index 850c09f..6e14e69 100644
--- a/AttractorKernel.hpp
+++ b/AttractorKernel.hpp
@@ -14,6 +14,8 @@ class AttractorKernel {
     virtual double&  parameter(const unsigned int index) = 0;
     virtual double*& parameters() = 0;
 
+    virtual unsigned int getNumberOfParameters() = 0;
+
     // get properties of the attractor
     // such as the dimension
     // you should delete the void pointer if you used it
diff --git a/AwesomeAttractor.cbp b/AwesomeAttractor.cbp
index 9333f37..48aa764 100644
--- a/AwesomeAttractor.cbp
+++ b/AwesomeAttractor.cbp
@@ -43,9 +43,8 @@
 		<Unit filename="Projector.hpp">
 			<Option compilerVar="CC" />
 		</Unit>
-		<Unit filename="attr/test.attr" />
-		<Unit filename="attr/test2.attr" />
-		<Unit filename="attr/waardes.txt" />
+		<Unit filename="kernels/Logistic.cpp" />
+		<Unit filename="kernels/Logistic.hpp" />
 		<Unit filename="kernels/Lorenz3D.cpp" />
 		<Unit filename="kernels/Lorenz3D.hpp" />
 		<Unit filename="kernels/Polynomial.cpp" />
@@ -58,6 +57,8 @@
 		<Unit filename="myMath.hpp" />
 		<Unit filename="pngwriter/pngwriter.cc" />
 		<Unit filename="pngwriter/pngwriter.h" />
+		<Unit filename="stfu/stf.cpp" />
+		<Unit filename="stfu/stf.hpp" />
 		<Extensions>
 			<code_completion />
 			<envvars />
diff --git a/Projector.cpp b/Projector.cpp
index 06a1222..f66ea2c 100644
--- a/Projector.cpp
+++ b/Projector.cpp
@@ -78,14 +78,14 @@ void Projector::finish_range() {
 }
 
 
-void Projector::project(double * point) {
+void Projector::project(const double * point) {
     assert(extern_dim >= 2);
     project_point[0] = point[0];
     project_point[1] = point[1];
 }
 
 
-void Projector::plot(double * point) {
+void Projector::plot(const double * point) {
     project(point);
 
     const double x = project_point[0]*factor + offset[0];
diff --git a/Projector.hpp b/Projector.hpp
index b6b86c8..84a8813 100644
--- a/Projector.hpp
+++ b/Projector.hpp
@@ -35,8 +35,8 @@ class Projector{
             -genormalizeerde coordinaten als kleurintensiteit (gebruikt fp canvas)
             -kleurbanden, dus met een periodieke functie (gebruikt int canvas)
     */
-    void project(double * point);
-    void plot(double * point);
+    void project(const double * point);
+    void plot(const double * point);
 
     void output();
 };
diff --git a/kernels/Logistic.cpp b/kernels/Logistic.cpp
index f3ac4e9..379561d 100644
--- a/kernels/Logistic.cpp
+++ b/kernels/Logistic.cpp
@@ -83,6 +83,10 @@ double & Logistic::parameter(const unsigned int index) {
     return myParameters[index];
 }
 
+unsigned int Logistic::getNumberOfParameters() {
+    return dimension;
+}
+
 double * & Logistic::vector() {
     return vectorNew;
 }
diff --git a/kernels/Logistic.hpp b/kernels/Logistic.hpp
index 40ccbd1..3f6de68 100644
--- a/kernels/Logistic.hpp
+++ b/kernels/Logistic.hpp
@@ -5,7 +5,7 @@
 
 #include "../AttractorKernel.hpp"
 
-class Logistic : AttractorKernel {
+class Logistic : public AttractorKernel {
     double * myParameters;
 
     double * vectorNew;
@@ -25,6 +25,8 @@ class Logistic : AttractorKernel {
     virtual double&  parameter(const unsigned int index);
     virtual double*& parameters();
 
+    virtual unsigned int getNumberOfParameters();
+
     // get properties of the attractor
     // such as the dimension
     // you should delete the void pointer if you used it
diff --git a/kernels/Lorenz3D.cpp b/kernels/Lorenz3D.cpp
index 23ee8ea..1b02f2e 100644
--- a/kernels/Lorenz3D.cpp
+++ b/kernels/Lorenz3D.cpp
@@ -1,29 +1,32 @@
 #include "Lorenz3D.hpp"
 
-Lorenz::Lorenz() {
+const static unsigned int dimension = 3;
+const static unsigned int numberOfParameters = 4;
+
+Lorenz3D::Lorenz3D() {
     init();
 }
 
-void Lorenz::init() {
+void Lorenz3D::init() {
     // allocation
-    myParameters = new double[4];
-    vectorNew = new double[3];
-    vectorOld = new double[3];
+    myParameters = new double[numberOfParameters];
+    vectorNew = new double[dimension];
+    vectorOld = new double[dimension];
 
     // initialisation
     assert(myParameters != NULL);
     assert(vectorNew != NULL);
     assert(vectorOld != NULL);
-    for ( unsigned int i = 0; i < 4; i++ ) {
+    for ( unsigned int i = 0; i < numberOfParameters; i++ ) {
         myParameters[i] = 0.0;
     }
-    for ( unsigned int i = 0; i < 3; i++ ) {
+    for ( unsigned int i = 0; i < dimension; i++ ) {
         vectorNew[i] = vectorOld[i] = 1.0;
     }
 }
 
 // the main function
-void Lorenz::iterate() {
+void Lorenz3D::iterate() {
     swap(vectorNew, vectorOld);
 
     vectorNew[0] = vectorOld[0] + myParameters[0] * myParameters[1] * (vectorOld[1] - vectorOld[0]);
@@ -41,32 +44,36 @@ void Lorenz::iterate() {
 */
 
 // setters, getters, all i/o to other classes/objects
-void * Lorenz::getProperty(const string identifier) {
+void * Lorenz3D::getProperty(const string identifier) {
     if ( identifier == "dimension" ) {
         unsigned int * _return = new unsigned int;
-        *_return = 3;
+        *_return = dimension;
         return _return;
     }
     return NULL;
 }
 
-void Lorenz::setProperty(const string identifier, const void * value) {
+void Lorenz3D::setProperty(const string identifier, const void * value) {
     return;
 }
 
-double * & Lorenz::parameters() {
+double * & Lorenz3D::parameters() {
     return myParameters;
 }
 
-double & Lorenz::parameter(const unsigned int index) {
+double & Lorenz3D::parameter(const unsigned int index) {
     return myParameters[index];
 }
 
-double * & Lorenz::vector() {
+unsigned int Lorenz3D::getNumberOfParameters() {
+    return numberOfParameters;
+}
+
+double * & Lorenz3D::vector() {
     return vectorNew;
 }
 
-double * & Lorenz::previousVector() {
+double * & Lorenz3D::previousVector() {
     return vectorOld;
 }
 
diff --git a/kernels/Lorenz3D.hpp b/kernels/Lorenz3D.hpp
index dce9fab..1bf2e7e 100644
--- a/kernels/Lorenz3D.hpp
+++ b/kernels/Lorenz3D.hpp
@@ -9,7 +9,7 @@ using namespace std;
 
 #include "../AttractorKernel.hpp"
 
-class Lorenz : public AttractorKernel {
+class Lorenz3D : public AttractorKernel {
 
     double * myParameters;
 
@@ -20,14 +20,16 @@ class Lorenz : public AttractorKernel {
 
     public:
 
-    Lorenz();
-    Lorenz(const unsigned int dimensions);
+    Lorenz3D();
+    Lorenz3D(const unsigned int dimensions);
 
     // parameters are stored in a array of doubles
     // if you want to use other types, use the properties
     virtual double&  parameter(const unsigned int index);
     virtual double*& parameters();
 
+    virtual unsigned int getNumberOfParameters();
+
     // get properties of the attractor
     // such as the dimension
     // you should delete the void pointer if you used it
diff --git a/kernels/Polynomial.cpp b/kernels/Polynomial.cpp
index 355d222..35ca8d6 100644
--- a/kernels/Polynomial.cpp
+++ b/kernels/Polynomial.cpp
@@ -128,6 +128,10 @@ double & Polynomial::parameter(const unsigned int index) {
     return myParameters[index];
 }
 
+unsigned int Polynomial::getNumberOfParameters() {
+    return numberOfParameters;
+}
+
 double * & Polynomial::vector() {
     return vectorNew;
 }
diff --git a/kernels/Polynomial.hpp b/kernels/Polynomial.hpp
index 3506871..7ec2196 100644
--- a/kernels/Polynomial.hpp
+++ b/kernels/Polynomial.hpp
@@ -30,6 +30,8 @@ class Polynomial : public AttractorKernel {
     virtual double&  parameter(const unsigned int index);
     virtual double*& parameters();
 
+    virtual unsigned int getNumberOfParameters();
+
     // get properties of the attractor
     // such as the dimension
     // you should delete the void pointer if you used it
diff --git a/kernels/PolynomialA3D.cpp b/kernels/PolynomialA3D.cpp
index 8a2b906..7776159 100644
--- a/kernels/PolynomialA3D.cpp
+++ b/kernels/PolynomialA3D.cpp
@@ -68,6 +68,10 @@ double & PolynomialA3D::parameter(const unsigned int index) {
     return myParameters[index];
 }
 
+unsigned int PolynomialA3D::getNumberOfParameters() {
+    return numberOfParameters;
+}
+
 double * & PolynomialA3D::vector() {
     return vectorNew;
 }
diff --git a/kernels/PolynomialA3D.hpp b/kernels/PolynomialA3D.hpp
index 5acae16..1434fc6 100644
--- a/kernels/PolynomialA3D.hpp
+++ b/kernels/PolynomialA3D.hpp
@@ -24,6 +24,8 @@ class PolynomialA3D : public AttractorKernel {
     virtual double&  parameter(const unsigned int index);
     virtual double*& parameters();
 
+    virtual unsigned int getNumberOfParameters();
+
     // get properties of the attractor
     // such as the dimension
     // you should delete the void pointer if you used it
diff --git a/kernels/Unravel3D.cpp b/kernels/Unravel3D.cpp
index 540c8d6..328629e 100644
--- a/kernels/Unravel3D.cpp
+++ b/kernels/Unravel3D.cpp
@@ -1,28 +1,31 @@
 #include "Unravel3D.hpp"
 
-Unravel::Unravel(){
+const static unsigned int dimension = 3;
+const static unsigned int numberOfParameters = 7;
+
+Unravel3D::Unravel3D(){
     init();
 }
 
-void Unravel::init() {
+void Unravel3D::init() {
     // allocation
-    myParameters = new double[4];
-    vectorNew = new double[3];
-    vectorOld = new double[3];
+    myParameters = new double[numberOfParameters];
+    vectorNew = new double[dimension];
+    vectorOld = new double[dimension];
 
     // initialisation
     assert(myParameters != NULL);
     assert(vectorNew != NULL);
     assert(vectorOld != NULL);
-    for ( unsigned int i = 0; i < 7; i++ ) {
+    for ( unsigned int i = 0; i < numberOfParameters; i++ ) {
         myParameters[i] = 0.0;
     }
-    for ( unsigned int i = 0; i < 3; i++ ) {
+    for ( unsigned int i = 0; i < dimension; i++ ) {
         vectorNew[i] = vectorOld[i] = 0.0;
     }
 }
 
-void Unravel::iterate() {
+void Unravel3D::iterate() {
     swap(vectorNew, vectorOld);
 
     vectorNew[0] = myParameters[0]*(vectorOld[2] + myParameters[1]);
@@ -41,31 +44,35 @@ void Unravel::iterate() {
 }
 
 // setters, getters, all i/o to other classes/objects
-void * Unravel::getProperty(const string identifier) {
+void * Unravel3D::getProperty(const string identifier) {
     if ( identifier == "dimension" ) {
         unsigned int * _return = new unsigned int;
-        *_return = 3;
+        *_return = dimension;
         return _return;
     }
     return NULL;
 }
 
-void Unravel::setProperty(const string identifier, const void * value) {
+void Unravel3D::setProperty(const string identifier, const void * value) {
     return;
 }
 
-double * & Unravel::parameters() {
+double * & Unravel3D::parameters() {
     return myParameters;
 }
 
-double & Unravel::parameter(const unsigned int index) {
+double & Unravel3D::parameter(const unsigned int index) {
     return myParameters[index];
 }
 
-double * & Unravel::vector() {
+unsigned int Unravel3D::getNumberOfParameters() {
+    return numberOfParameters;
+}
+
+double * & Unravel3D::vector() {
     return vectorNew;
 }
 
-double * & Unravel::previousVector() {
+double * & Unravel3D::previousVector() {
     return vectorOld;
 }
diff --git a/kernels/Unravel3D.hpp b/kernels/Unravel3D.hpp
index 3464c87..94a693a 100644
--- a/kernels/Unravel3D.hpp
+++ b/kernels/Unravel3D.hpp
@@ -10,7 +10,7 @@ using namespace std;
 
 #include "../AttractorKernel.hpp"
 
-class Unravel : public AttractorKernel {
+class Unravel3D : public AttractorKernel {
 
     double * myParameters;
 
@@ -21,14 +21,16 @@ class Unravel : public AttractorKernel {
 
     public:
 
-    Unravel();
-    Unravel(const unsigned int dimensions);
+    Unravel3D();
+    Unravel3D(const unsigned int dimensions);
 
     // parameters are stored in a array of doubles
     // if you want to use other types, use the properties
     virtual double&  parameter(const unsigned int index);
     virtual double*& parameters();
 
+    virtual unsigned int getNumberOfParameters();
+
     // get properties of the attractor
     // such as the dimension
     // you should delete the void pointer if you used it
diff --git a/main.cpp b/main.cpp
index 90919bf..5f16345 100644
--- a/main.cpp
+++ b/main.cpp
@@ -11,9 +11,9 @@ using namespace std;
 // TODO : Allemaal files inlezen, voor makkelijker gebruik
 
 int main(int argc, char *argv[]) {
-
+/*
     AttractorKernel * mijnAttractortje;
-    mijnAttractortje = new Lorenz();
+    mijnAttractortje = new Lorenz3D();
     AttractorKernel &attractor = *mijnAttractortje;
 
     attractor.parameter(0) = 1.0;
@@ -35,7 +35,13 @@ int main(int argc, char *argv[]) {
         }
         cout << endl;
     }
+*/
 
+    Attractor myAttractor("attractors/testAttractor.stf");
+    for ( unsigned int i = 0; i < 20; i++ ) {
+        myAttractor.iterate();
+        myAttractor.output();
+    }
 
     /*if ( argc <= 2 ) {
         cout << endl << "nothing to do..." << endl;
diff --git a/stfu/stf.hpp b/stfu/stf.hpp
index 8a25538..8d8a08d 100644
--- a/stfu/stf.hpp
+++ b/stfu/stf.hpp
@@ -280,9 +280,9 @@ namespace stfu {
         bool read(istream &in);
 
         /**
-        Reads the STF from a file
+            Reads the STF from a file
 
-        \return Returns whether it was succesful
+            \return Returns whether it was succesful
         */
         bool read(const char *filename);