Spiral Matrix

spiral-matrix.py

def spiralPathMatrix(matrix, n, m):
    # right down left up
    directions = [1,0,0,0]
    verticalLimit = 0
    horizontalLimit = 0
    iterations = (n * m )
    row,col = [0,0]
    direction = 0 # we moving right
    prev = 0
    items = [matrix[0][0]]
    while(len(items) < iterations):
        row = row + (directions[1]) -(directions[3])
        col = col + (directions[0]) - (directions[2])
        if col % (m-horizontalLimit) == 0 and direction == 0:
            directions[prev] = 0
            direction = (direction + 1) % 4
            prev = direction
            directions[direction] = 1
            col -= 1
            continue
        if col == horizontalLimit and direction == 2:
            directions[prev] = 0
            direction = (direction + 1) % 4
            prev = direction
            directions[direction] = 1
            horizontalLimit += 1
        if row % (n-verticalLimit) == 0 and direction == 1:
            directions[prev] = 0
            direction = (direction + 1) % 4
            prev = direction
            directions[direction] = 1
            row -=1
            continue
        if row == verticalLimit and direction == 3:
            directions[prev] = 0
            direction = (direction + 1) % 4
            prev = direction
            directions[direction] = 1
            verticalLimit += 1
            row += 1
            continue
        items.append(matrix[row][col])

    return items

n = 3
m = 3
grid = [[-41, 334, 169],
[478, 962, -705],
[-281, -961, 995]]

print(spiralPathMatrix(grid,n,m))