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Ali Dahud
3,459 Pointscan you explain please?
On lines 12,17,22,27 why did we increment/decrement the values?
# EXAMPLES:
# move((1, 1, 10), (-1, 0)) => (0, 1, 10)
# move((0, 1, 10), (-1, 0)) => (0, 1, 5)
# move((0, 9, 5), (0, 1)) => (0, 9, 0)
def move(player, direction):
x, y, hp = player
if direction == (-1,0):
x -= 1
if x < 0:
hp -= 5
x += 1
elif direction == (1,0):
x += 1
if x > 9:
hp -= 5
x -= 1
elif direction == (0,-1):
y -= 1
if y < 0:
hp -= 5
y += 1
elif direction == (0,1):
y += 1
if y > 9:
hp -= 5
y -= 1
return x, y, hp
1 Answer
Steven Parker
229,786 PointsThat's because the movement was already applied before testing to see if the boundary was crossed. If so, damage was applied to the "hp" value, and the additional increment or decrement puts the position back to where it was.
Jake Kobs
9,215 PointsJake Kobs
9,215 PointsIf you're speaking about the code where the x,y values are either -=1 or +=1, it's because if the player goes passed the specified location values ((0,0) to (9,9)), then he/she would be out of the specified area. For instance, doing y-=1 would move your player back to spot 9 on the y coordinate because you wouldn't want the player to be out of bounds.