def rescale(v, s):
m = calculateSpeed(v)
ratio = 0
if m > 0:
ratio = s / m
try:
r = Spatial.Vector(v.DirectionX * ratio, v.DirectionY * ratio)
except:
r = Spatial.Vector(v.PositionX * ratio, v.PositionY * ratio)
return r
def calculateMovement(coreFunctions, parameters, weather, state, instruction):
# (coreFunctions:SimulationCoreFunctions)
# (parameters:FlightParameters)
# (weather:WeatherState) (state:FlightState) (instruction:Instruction)
time = parameters.ActualGateDepartureTime + state.TimeElapsed * 1.0 # <Time/Hours>
currentPosition = state.AircraftPosition
altitude = Spatial.positionToAltitude(currentPosition)
grossWeight = coreFunctions.WeightModel(parameters, state)
(destination, instructedAirSpeed) = instruction
currentLocation = Spatial.positionToLocation(currentPosition)
destinationLocation = Spatial.positionToLocation(destination)
destinationAltitude = coreFunctions.AltitudeLimiter(
grossWeight, Spatial.positionToAltitude(destination))
airSpeed = coreFunctions.AirSpeedLimiter(
parameters.AircraftType.MaximumMachSpeed, grossWeight, altitude,
instructedAirSpeed)
deltaVector = Spatial.calculateLocationDifference(currentLocation,
destinationLocation)
distance = Spatial.calculateDistance1(currentLocation, destinationLocation)
if distance <= 0.0:
zeroGroundSpeed = Spatial.Vector(0.0, 0.0)
return (0.0, zeroGroundSpeed, 0.0, 0.0, 0.0, [])
else:
#windVector = getWindVelocity(weather, time, currentPosition)
windVector = Weather.zeroWindVelocity
groundSpeed = Movement.calculateGroundVelocity(
airSpeed, Spatial.calculateRadians(deltaVector), windVector)
groundVector = Movement.rescale(deltaVector, groundSpeed)
(cruiseBurn, verticalCruiseFuelDiff, verticalVelocity) = \
coreFunctions.FuelModel(FuelModel.flightFunctions, grossWeight, altitude,
airSpeed,
FlightTypes.getVerticalState(altitude, destinationAltitude))
return (cruiseBurn, groundVector, verticalCruiseFuelDiff,
verticalVelocity, airSpeed, [])
from collections import namedtuple import Spatial # zeroWindVelocity = Spatial.Vector(0, 0)
