protected void MutateGene( )
{
// select random point of mutation
int mutationPoint = rand.Next( length );
if ( mutationPoint < headLength )
{
// genes from head can be randomized freely (type may change)
genes[mutationPoint].Generate( );
}
else
{
// genes from tail cannot change their type - they
// should be always arguments
genes[mutationPoint].Generate( GPGeneType.Argument );
}
}
