

def calculateSlopeVectorField(point):
    #for a point add up the surrounding vectors
    pass

def findVector(pointA, pointB):
    # need to break into 3 parts? x, y, z? 
    pass

def erode(eleveationMapCSV):
    #for each point - calculate the slope with the points around it

    #for each point - move materail based on slope and rainfall
    pass