Powertrain.py

#########################################
#
#   Powertrain.py  Blender 2.6
#
#   tutorial can be found at
#
#   www.tutorialsforblender3d.com
#
#   Released under the Creative Commons Attribution 3.0 Unported License.
#
#   If you use this code, please include this information header.
#
##########################################


# Main Program
def main():

	# get the current controller
	controller = bge.logic.getCurrentController()

	# get vehicle constraint ID
	vehicleID = ConstraintID(controller)

	# brakes
	brakes = Brakes(vehicleID, controller)

	# gas & reverse
	Power( vehicleID, controller, brakes)

	# steering
	Steering(vehicleID, controller)


########################################################  Vehicle ID

# get vehicle constraint ID
def ConstraintID(controller):

	# get car the controller is attached to
	car = controller.owner

	# get saved vehicle Constraint ID
	vehicleID = car["vehicleID"]

	return vehicleID

########################################################  Brakes

def Brakes(vehicleID, controller):

	# set braking amount
	brakeAmount = 20.0   # front and back brakes
	ebrakeAmount = 45.0	  # back brakes only

	# get sensors
	reverse = controller.sensors["Reverse"]		# sensor named "Reverse"
	brake = controller.sensors["Brake"]			# sensor named "Brake
	emergency = controller.sensors["EBrake"]	# sensor named "EBrake"

	# emergency brakes
	if emergency.positive == True:

		front_Brake = 0.0
		back_Brake = ebrakeAmount
		brakes = True

	# brake
	elif brake.positive == True and reverse.positive == False:

		front_Brake = brakeAmount
		back_Brake = brakeAmount
		brakes = True

	# no brakes
	else:

		front_Brake = 0.0
		back_Brake = 0.0
		brakes = False

	# brakes
	vehicleID.applyBraking( front_Brake, 0)
	vehicleID.applyBraking( front_Brake, 1)
	vehicleID.applyBraking( back_Brake, 2)
	vehicleID.applyBraking( back_Brake, 3)

	return brakes

##########################################  Gas & Reverse

# gas and reverse
def Power( vehicleID, controller, brakes):

	# set power amounts
	reversePower = 180.0
	gasPower = 360.0

	# get power sensors
	gas = controller.sensors["Gas"]				# sensor named "Gas"
	reverse = controller.sensors["Reverse"]		# sensor named "Reverse"

	# brakes
	if brakes == True:

		power = 0.0

	# reverse
	elif reverse.positive == True:

		power = reversePower

	# gas pedal
	elif gas.positive == True:

		power = -gasPower

	# no gas and no reverse
	else:

		power = 0.0

	# apply power
	vehicleID.applyEngineForce( power, 0)
	vehicleID.applyEngineForce( power, 1)
	vehicleID.applyEngineForce( power, 2)
	vehicleID.applyEngineForce( power, 3)


##################################################  Steering

def Steering( vehicleID, controller):

	# set turn amount
	turn = 0.6


	# get steering sensors
	steerLeft = controller.sensors["Left"]		# sensor named "Left"
	steerRight = controller.sensors["Right"]	# sensor named "Right"

	# turn left
	if steerLeft.positive == True:

		turn = turn

	# turn right
	elif steerRight.positive == True:

		turn = -turn

	# go straight
	else:
		turn = 0.0

	# steer with front tires only
	vehicleID.setSteeringValue(turn,0)
	vehicleID.setSteeringValue(turn,1)


###############################################

#import bge
import bge

# run main program
main()