private void BuildConnections()
{
for (int y = 0; y < height; ++y)
{
for (int x = 0; x < width; ++x)
{
PathfindingNode test = nodes[x, y];
if (test != null && !allNodes.Contains(test))
{
allNodes.Add(test);
test.FindConnections(this);
}
}
}
}