## Creature Project
## CSC323
## 4/17/10
## Direction.py: Contains the Direction enumerated type: N,NE,E,SE,S,SW,W,NW,C.

class Direction:
    """Static method used for defining the positions at which a cell can be 
       located"""
    @staticmethod
    def fromString(string):
        if string=="N":
            return N
        elif string=="NE":
            return NE
        elif string=="E":
            return E
        elif string=="SE":
            return SE
        elif string=="S":
            return S
        elif string=="SW":
            return SW
        elif string=="W":
            return W
        elif string=="NW":
            return NW
        else:
            #Not a Direction
            raise Error("Not a Direction")
    def getDirection(x, y):
        """This method takes an x and y coordinator and returns proper direction
        Direction is based on 3 x 3 grid where (0,0) is NW and (2,2) is SE"""
        x = x%3
        y = y%3
        
        if x == 0:
            if y == 0:
                return NW
            elif y == 1:
                return N
            elif y == 2:
                return NE
        elif x == 1:
            if y == 0:
                return W
            elif y == 1:
                return C
            elif y == 2:
                return E
        elif x == 2:
            if y == 0:
                return SW
            elif y == 1:
                return S
            elif y == 2:
                return SE
class N:
    x = 0
    y = -1
    def __str__():
        return "N" 
class NE:
    x = 1
    y = -1
    def __str__():
        return "NE"
class E:
    x = 1
    y = 0
    def __str__():
        return "E" 
class SE:
    x = 1
    y = 1
    def __str__():
        return "SE" 
class S:
    x = 0
    y = 1
    def __str__():
        return "S" 
class SW:
    x = -1
    y = 1
    def __str__():
        return "SW" 
class W:
    x = -1
    y = 0
    def __str__():
        return "W"
class NW:
    x = -1
    y = -1
    def __str__():
        return "NW"
class C:
    x = 0
    y = 0
    def __str__():
        return "C"