/// <summary>
/// Helper method: generates a random index for refering to
/// nurons or axons, garenteed to be unique. It returns negative
/// if no sutch index can be found in a timely fassion.
/// </summary>
/// <returns>A random unique index</returns>
private int RandIndex()
{
int index = -1;
int count = 0;
while (index < 0 && count < MAX_TRY)
{
//chooses a ranom positive interger
index = rng.NextInt() & Int32.MaxValue;
//invalidates the index if we have a collision
if (nurons.HasKey(index))
{
index = -1;
}
count++;
}
return(index);
}
