(block centre) = (a,b)
Find Block A extent (X,Y)
X = width
Find X minimum = ((block centre) - (width/2)
Find X maximum = ((block centre) + (width/2)
Y = height
Find Y minimum = ((block centre) - (height/2)
Find Y maximum = ((block centre) + (height/2)
Repeat for Blocks B to F
Check if Blocks adjacent front or rear
If Block A(X minimum, Y minimum) = Block B(X minimum, Y maximum)
or if Block A(X minimum, Y maximum) = Block B(X minimum, Y minimum)
or if Block A(X maximum, Y minimum) = Block B(X maximum, Y maximum)
or if Block A(X maximum, Y maximum) = Block B(X maximum, Y minimum)
Then return : Block A and Block B adjacent
Check if Blocks adjacent left or right
If Block A(X minimum, Y minimum) = Block B(X maximum, Y minimum)
or if Block A(X minimum, Y maximum) = Block B(X maximum, Y maximum)
or if Block A(X maximum, Y minimum) = Block B(X minimum, Y minimum)
or if Block A(X maximum, Y maximum) = Block B(X minimum, Y maximum)
Then return : Block A and Block B adjacent
Check if Blocks adjacent on diagonal
If Block A(X minimum, Y minimum) = Block B(X maximum, Y maximum)
or if Block A(X minimum, Y maximum) = Block B(X maximum, Y minimum)
or if Block A(X maximum, Y minimum) = Block B(X minimum, Y maximum)
or if Block A(X maximum, Y maximum) = Block B(X minimum, Y minimum)
Then return : Block A and Block B adjacent
Repeat for Block A with Blocks C to F
Then start check for Block B, and repeat through to Block F.
