getting data to the genome (Re: Objective(GAGenome& g...)

[Matthew Wall]

to get additional information into a genome or objective function, 
you should either derive a new genome class that has data members for 
the information you are trying to pass, or you should use a 
'userData' object with an existing galib genome.

deriving a new genome is described in the 'extensions' portion of the 
documentation.

if you do the userData option, then your userData class would be 
something like this:

class MyUserData : public GAUserData {
   double* Rdata;
   int* Rrow;
   int* Rcol;
   double* Rpki;
public:
   MyUserData();
   ~MyUserData();
   MyUserData* clone();
   void copy(const GAUserData&);
};

to use it, something like this:

main() {
   MyUserData data;
   GA1DBinarySringGenome genome(length, ObjectiveFunction, data);
   GASimpleGA ga(genome);
   ga.evolve();
}

float
ObjectiveFunction(GAGenome& g) {
   GA1DBinaryStringGenome& genome = (GA1DBinaryStringGenome&)g;
   MyUserData* d = (MyUserData*)(genome.userData());

   // objective stuff here
}

MyUserData::clone must be able to generate a new user data instance. 
MyUserData::copy must be able to duplicate an existing user data 
object.


>Hello galib people,
>
>i need for evaluation of the scoring function to pass other argument
>(double * Rdata, int * Rrow, int * Rcol, double * Rpki)
>from the main part.
>
>Of course when i compile i got :
>
>error C2664: 'GA1DBinaryStringGenome::GA1DBinaryStringGenome(unsigned
>int,float (__cdecl *)(class GAGenome &),void *)' : cannot convert
>parameter 2 from 'float (class GAGenome &,double *,int *,int *,double
>*)' to 'float (__cdecl *)(class GAGenome &)'
>
>Is it possible by modifying the Gagenome.h or Gagenome.C codes
>
>or is there any to pass my arguments elseway