libcrbn/sampler/monteCarloSampler.hpp

#ifndef _MONTE_CARLO_SAMPLER_HPP_
#define _MONTE_CARLO_SAMPLER_HPP_

#include "sampler.h"

// Monte Carlo sampling
// (read random sampler :)
class MonterCarloSampler : public Sampler {
  public:
        // Constructor
        MonteCarloSampler(const int& iNSamples, const int& iNDimensions) : 
                Sampler(iNSamples, iNDimensions) {}

        // Destructor
        virtual ~MonteCarloSampler() {}

        // Computes next sample and store it in the array
        // passed as argument.
        // Returns false if we generated the s'th sample.
        bool next(float* iV) {
                if(_samplePos == _nSamples) {
                        _samplePos = 0;
                }
                
                int i;
                for(i = 0; i < _nDimensions; ++i) {
                        iV[i] = random() / (float)RAND_MAX;
                }
                
                return (_samplePos < _nSamples);
        }
};

#endif

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