// $Id$
//
//    File: nnann_weight.h
// Created: Sat Apr  2 21:10:00 EDT 2011
// Creator: davidl (on Darwin Amelia.local 9.8.0 i386)
//

#ifndef _nnann_weight_
#define _nnann_weight_

// The nnann_weight class represents a connection between two neurons in neighboring layers.
// This object provides a somewhat symmetric view of the neurons making it easier to propagate
// either forward or backward (for training).


class nnann_neuron;

class nnann_weight{
	public:
		              nnann_weight(){}
		      virtual ~nnann_weight(){}
		
		         void BackPropagate(void){input->AddToOutputError(output->GetInputError()*weight);}
		nnann_neuron* GetInput(void){return input;}
		nnann_neuron* GetOutput(void){return output;}
		       double GetWeight(void){return weight;}
				 void ForwardPropagate(void){output->AddToInput(input->GetOutput()*weight);}
		         void SetInput(nnann_neuron *input){this->input = input;}
		         void SetOutput(nnann_neuron *output){this->output = output;}
		         void SetWeight(double weight){this->weight = weight;}
		
	protected:
		nnann_neuron *input;
		nnann_neuron *output;
		double weight;

	private:

};

#endif // _nnann_weight_