World Of Warships Shells flying time

[ahwa 26]

def firstOrderInterceptTime(shotSpeed, targetRelativePosition, targetRelativeVelocity):
    velocitySquared = targetRelativeVelocity.lengthSquared
    if velocitySquared < 0.001:
        return 0.0
    a = velocitySquared - shotSpeed * shotSpeed
    if abs(a) < 0.001:
        t = -targetRelativePosition.lengthSquared / (2.0 * targetRelativeVelocity.dot(targetRelativePosition))
        return max(t, 0.0)
    b = 2.0 * targetRelativeVelocity.dot(targetRelativePosition)
    c = targetRelativePosition.lengthSquared
    determinant = b * b - 4.0 * a * c
    if determinant > 0.0:
        t1 = (-b + math.sqrt(determinant)) / (2.0 * a)
        t2 = (-b - math.sqrt(determinant)) / (2.0 * a)
        if t1 > 0.0:
            if t2 > 0.0:
                return min(t1, t2)
            else:
                return t1
        else:
            return max(t2, 0.0)
    else:
        if determinant < 0.0:
            return 0.0
        return max(-b / (2.0 * a), 0.0)

Apply mechanically and modify to WOT

SpeedInfo = BigWorld.target.filter.speedInfo.value
speed = SpeedInfo[0]
fwdSpeedLimit, bckwdSpeedLimit = BigWorld.target.typeDescriptor.physics['speedLimits']
MAX_SPEED_MULTIPLIER = 1.5
fwdSpeedLimit *= MAX_SPEED_MULTIPLIER
bckwdSpeedLimit *= MAX_SPEED_MULTIPLIER
if speed > fwdSpeedLimit:
    speed = fwdSpeedLimit
elif speed < -bckwdSpeedLimit:
    speed = -bckwdSpeedLimit
TargetSpeed = abs(round(speed, 3))

try:
   Yaw = BigWorld.target.yaw
except:
   Yaw = 0.0

Dist = (BigWorld.player().getOwnVehiclePosition() - TargetPosition).length
ShotSpeed = BigWorld.player().vehicleTypeDescriptor.shot['speed']

ShotTime = FirstOrderInterceptTime(ShotSpeed, Dist, TargetSpeed, Yaw)

def FirstOrderInterceptTime(ShotSpeed, Dist, Speed, Yaw):
    Y = Dist
    if Speed < 0.001:
        return 0.0
    Yaw = Yaw + math.pi
    a = Speed - ShotSpeed * ShotSpeed
    if abs(a) < 0.001:
        t = -Y / (2.0 * Y * math.cos(Yaw))
        return max(t, 0.0)
    b = 2.0 * Y * math.cos(Yaw)
    c = Y ** 2
    determinant = b * b - 4.0 * a * c
    if determinant > 0.0:
        t1 = (-b + math.sqrt(determinant)) / (2.0 * a)
        t2 = (-b - math.sqrt(determinant)) / (2.0 * a)
        if t1 > 0.0:
            if t2 > 0.0:
                return min(t1, t2)
            else:
                return t1
        else:
            return max(t2, 0.0)
    else:
        if determinant < 0.0:
            return 0.0
        return max(-b / (2.0 * a), 0.0)

I do this wrong????

How do I Apply mechanically and modify