[Toon-members] NEW(with code) : Implementation of BaseClass with virtual template functions with TOON

[Gabriel Nützi]

(Here again because source code was missing)

Hello all,

I have a basic question where I am completely stuck with TooN:

I dont know how to realize this:

I have a DynamicSystem Class which describes a Dynamical System with template parameter <int NDOF>

I would like to have a Class Solver which has a reference to an instance of DynamicSystem.

The solver should be able to call several virtual functions from DynamicSystem. (subClass could be a Ball or a Car or what ever :-))

The main problem is that this main functions take Vectors/Matrices as Input and give Vector and Matrices as Output back (depending on NDOF)

but when I want to properly define such a function in TOON i need templates (to be able to input also slices and so on....)

like 

template<typename BaseM, typename BaseV>

Matrix<3,3,double,BaseM> get_M (double t, Vector<3,double, BaseV > x   ){

// some code

}

But the problem is that in C++ we can not define templates as virtual functions......

(SEE ATTACHED SIMPLE CODE!!)

HOW DO I SOLVE this Problem with TooN?

How should I structure my Classes? Would be very helpful if someone can quickly append the changes in the attached source code (ITS SIMPLE :-))!

Thank you very much for your HELP!!

=========================================CODE======================================================

#include <iostream>

#include <TooN/TooN.h>

using namespace std;

using namespace TooN;

template<int NDOF>

class DynamicSystem {

public:

DynamicSystem(){

};

~DynamicSystem(){

};

virtual Matrix<NDOF,NDOF> get_M(double t, Vector<NDOF> x)=0;

private:

int ndof;

};

class WoodPecker : public DynamicSystem<3>{

public:

WoodPecker(){

};

~WoodPecker(){

};

Matrix<3,3> get_M(double t, Vector<3> x){

Matrix<3,3> A =Identity;

return A;

}

};

template<int NDOF>

class Solver{

public:

Solver(DynamicSystem<NDOF> & myref): ref(myref) {

};

~Solver(){

};

DynamicSystem<NDOF> & ref;

void dosome(){

Vector<> a(NDOF);

cout << ref.get_M(0,a) <<endl; //works

// cout << ref.get_M(0,a.slice<>(1,NDOF)) <<endl; // does not work..... (shit) :-)

}

};