def __init__(self,world,vel,mass,max_speed,max_turn_rate,max_force,**kwargs):
self._velocity = Vector2(vel)
self.max_speed = max_speed
self._max_turn_rate = max_turn_rate
self._max_force = max_force
self.mass = mass
# create a reference to steering behavior and
# pass a reference of ourselves to it
self._steering = SteeringBehaviors(self)
self._steering.seek_on()
self._world = world
super().__init__(Vehicle.IMG_FILE, **kwargs)
#TODO: Check that we have a position in kwargs
#if not ('pos' in kwargs):
# raise ValueError("you must specify a pos arg. See pygamezero Actor documentation")
self.exact_pos = Vector2(self.pos)
self.angle = self.velocity.as_polar()[1]
self._heading = Vector2(cos(radians(self.angle)), -sin(radians(self.angle)))
self._side = self._heading.rotate(90)
class Vehicle(Actor2):
IMG_FILE = 'player'
# Document the constructor. Essentially what we are doing here
# is handling all of the vehicle specific args as positional parameters
# everything passed in is wrapped up as kwargs and passed into the pgzero
# Actor superclass. Look at the Actor class documentation to see what the valid
# args are for this.
#
# This class will also handle the image for the Vehicle internally.
def __init__(self,world,vel,mass,max_speed,max_turn_rate,max_force,**kwargs):
self._velocity = Vector2(vel)
self.max_speed = max_speed
self._max_turn_rate = max_turn_rate
self._max_force = max_force
self.mass = mass
# create a reference to steering behavior and
# pass a reference of ourselves to it
self._steering = SteeringBehaviors(self)
self._steering.seek_on()
self._world = world
super().__init__(Vehicle.IMG_FILE, **kwargs)
#TODO: Check that we have a position in kwargs
#if not ('pos' in kwargs):
# raise ValueError("you must specify a pos arg. See pygamezero Actor documentation")
self.exact_pos = Vector2(self.pos)
self.angle = self.velocity.as_polar()[1]
self._heading = Vector2(cos(radians(self.angle)), -sin(radians(self.angle)))
self._side = self._heading.rotate(90)
def update(self,dt):
steering_force = self._steering.calculate()
accel = steering_force / self.mass
self.velocity += accel * dt
truncate_ip( self.velocity, self.max_speed)
self.exact_pos += self.velocity * dt
if self.velocity.length() > 0.0001:
self._heading = self._velocity.normalize()
self._side = self._heading.rotate(90)
self.pos = self.exact_pos
self.angle = -self.velocity.as_polar()[1]
def toggle_behavior(self,behavior):
self._steering.toggle_behavior(behavior)
@property
def velocity(self):
return self._velocity
@velocity.setter
def velocity(self,vec):
self._velocity = Vector2(vec)
@property
def world(self): return self._world