def haveClearShotOfTarget(self,
target):
owner = self.owner
fleet = owner.fleet
turretPosition = self.getPosition()
targetPosition = target.getPosition()
turretToTarget = calculate.subtractPoints(targetPosition,
turretPosition)
distanceSquaredToTarget = vector.getMagnitudeSquared(turretToTarget)
headingToTarget = vector.normalize(turretToTarget)
for friendlyShip in fleet.getAllShips():
friendPosition = friendlyShip.getPosition()
turretToFriend = calculate.subtractPoints(friendPosition,
turretPosition)
distanceSquaredToFriend = vector.getMagnitudeSquared(turretToFriend)
if distanceSquaredToFriend > distanceSquaredToTarget:
continue
headingToFriend = vector.normalize(turretToFriend)
dotProductOfFriendAndTarget = calculate.dotProduct(headingToTarget,
headingToFriend)
if calculate.withinTolerance(dotProductOfFriendAndTarget,
1,
self.clearShotTolerance):
return False
return True
def test_toleranceIsZero_aboveTolerance(self):
tolerance = 0
value = 1
threshold = .9
withinTolerance = calculate.withinTolerance(value,
threshold,
tolerance)
self.assertFalse(withinTolerance)
def test_toleranceIsZero_belowTolerance(self):
tolerance = 0
value = .9
threshold = 1
withinTolerance = calculate.withinTolerance(value,
threshold,
tolerance)
self.assertFalse(withinTolerance)
def test_toleranceIsZero_withinTolerance(self):
tolerance = 0
value = 1
threshold = 1
withinTolerance = calculate.withinTolerance(value,
threshold,
tolerance)
self.assertTrue(withinTolerance)