www.pudn.com > 基于VC的神经网络开发程序包(源码).rar > Link.cpp

#include "../include/Link.h" 
#include "../include/Neuron.h" 
 
using namespace std; 
 
namespace annie 
{ 
 
Link::Link(Neuron *to, Neuron *from) 
{ 
	_from = from; 
	_to = to; 
	_deltaWeight = 0; 
	_lastDeltaWeight = 0; 
	setWeight(random()); 
} 
 
Link::Link(Neuron *to, Neuron *from, real weight) 
{	 
	_from = from; 
	_to = to; 
	_deltaWeight = 0; 
	_lastDeltaWeight = 0; 
	setWeight(weight);	 
} 
 
void 
Link::setWeight(real weight) 
{	 
	_weight = weight;	 
	_to->invalidateOutputCache(); 
	_from->invalidateErrorCache(); 
} 
 
bool 
Link::isEqualTo(Link *l) 
{ 
	return (l->_from == this->_from && l->_to == this->_to); 
} 
 
Link::~Link() 
{ 
	LINKS::iterator it; 
	 
	for (it=_to->_inputLinks.begin();it!=_to->_inputLinks.end();it++) 
	{ 
		Link *l=(Link *)(*it); 
		if (isEqualTo(l)) 
		{ 
			it = _to->_inputLinks.erase(it); 
			break; 
		} 
	} 
 
	for (it=_from->_outputLinks.begin();it!=_from->_outputLinks.end();it++) 
	{ 
		Link *l=(Link *)(*it); 
		if (isEqualTo(l)) 
		{ 
			it = _from->_outputLinks.erase(it); 
			break; 
		} 
	} 
} 
 
Neuron * 
Link::getSource() 
{	return _from; } 
 
Neuron * 
Link::getDestination() 
{	return _to; } 
 
real 
Link::getWeight() 
{	return _weight;	} 
 
void 
Link::setDeltaWeight(real delta) 
{	 
	_lastDeltaWeight = _deltaWeight; 
	_deltaWeight = delta;  
} 
 
real 
Link::getLastDeltaWeight() 
{ 
	return _deltaWeight; 
} 
 
void 
Link::updateWeight() 
{ 
	_weight += _deltaWeight; 
	_deltaWeight = 0.0; 
} 
 
}; //namespace annie