protected override void PropogateForward(RectangularStep downstream, int mapNumber)
{
RectangularStep upstream = downstream.Upstream[mapNumber];
int index = 0;
for (int y = 0; y < downstream.Height; y++)
{
for (int x = 0; x < downstream.Width; x++)
{
downstream.WeightedInputs[index++] += PropogateForward(upstream, x * Width, y * Height, mapNumber);
}
}
}