def __init__(self, bzrc):
self.bzrc = bzrc
self.constants = self.bzrc.get_constants()
self.commands = []
mytanks, othertanks, flags, shots = self.bzrc.get_lots_o_stuff()
self.numoftanks = len(mytanks)
self.timeuntilshot = [0]*self.numoftanks
self.ismoving = [True]*self.numoftanks
# Create Grid of points
truepositive = float(self.constants['truepositive'])
truenegative = float(self.constants['truenegative'])
self.grid = Grid(800, 800, truepositive, truenegative)
self.grid.init_window(800, 800)
# For PD Control
self.old_angle = [0]*self.numoftanks
self.old_speed = [0]*self.numoftanks
self.sample_radius = 100
self.k = 0.1
self.field = PotentialFieldsCalculator(self.grid, self.sample_radius, 80.0, 0.0, 0.3, 0.45)
class Agent(object):
"""Class handles all command and control logic for a teams tanks."""
def __init__(self, bzrc):
self.bzrc = bzrc
self.constants = self.bzrc.get_constants()
self.commands = []
mytanks, othertanks, flags, shots = self.bzrc.get_lots_o_stuff()
self.numoftanks = len(mytanks)
self.timeuntilshot = [0]*self.numoftanks
self.ismoving = [True]*self.numoftanks
# Create Grid of points
truepositive = float(self.constants['truepositive'])
truenegative = float(self.constants['truenegative'])
self.grid = Grid(800, 800, truepositive, truenegative)
self.grid.init_window(800, 800)
# For PD Control
self.old_angle = [0]*self.numoftanks
self.old_speed = [0]*self.numoftanks
self.sample_radius = 100
self.k = 0.1
self.field = PotentialFieldsCalculator(self.grid, self.sample_radius, 80.0, 0.0, 0.3, 0.45)
def tick(self, time_diff):
"""Some time has passed; decide what to do next."""
mytanks, othertanks, flags, shots = self.bzrc.get_lots_o_stuff()
self.mytanks = mytanks
self.commands = []
for tank in mytanks:
# update the grid
self.grid.update(self.bzrc.get_occgrid(tank.index))
# move
self.create_command(tank, time_diff)
self.grid.draw_grid()
results = self.bzrc.do_commands(self.commands)
def create_command(self, tank, time_diff):
"""Set command to move to given coordinates."""
#pprint (vars(tank))
speed = 1
angvel = 0
shoot = True
kp = 1
kd = -.07
if time_diff <= 0:
return
# get potential field at this location and add to enemy coords
x, y = self.field.calculate_potential(tank.x, tank.y)
# PD Controller - angle
target_angle = math.atan2(y, x)
angle_remaining = self.angle_remaining(tank.angle, target_angle)
angvel = self.pd_angvel(tank, target_angle, time_diff)
if angvel > 1:
angvel = 1
elif angvel < -1:
angvel = -1
if abs(angle_remaining) <= math.pi / 6:
speed = self.pd_speed(tank, x, y, time_diff)
else:
speed = 1 - abs(angle_remaining / math.pi)
if speed > 1:
speed = 1.0
elif speed < -1:
speed = -1.0
#print "speed", speed
#self.printSurrounding(tank.x, tank.y, 3)
command = Command(tank.index, speed, angvel, shoot)
self.commands.append(command)
self.old_angle[tank.index] = tank.angle
def printSurrounding(self, x, y, radius):
print ':::New Grid:::', x, y
surroundingGrid = self.grid.getSurroundings(x, y, radius)
for x in range(len(surroundingGrid)):
print surroundingGrid[x]
def pd_angvel(self, tank, target_angle, time_diff):
"""PD Controller for the angular velocity of the tank."""
kp = 1.0
kd = -0.2
angle_remaining = self.angle_remaining(tank.angle, target_angle)
differential = self.angle_remaining(self.old_angle[tank.index], tank.angle) / time_diff
angvel = ( kp * angle_remaining ) + ( kd * differential )
return angvel
def pd_speed(self, tank, target_x, target_y, time_diff):
"""PD Controller for the speed of the tank."""
kp = 1.0
kd = -0.2
x_remaining = target_x - tank.x
y_remaining = target_y - tank.y
distance_remaining = math.sqrt( ( x_remaining ) ** 2 + ( y_remaining ) ** 2 )
current_speed = math.sqrt( tank.vx ** 2 + tank.vy ** 2 )
differential = current_speed - self.old_speed[tank.index] / time_diff
speed = ( kp * distance_remaining ) + ( kd * differential )
return speed
def angle_remaining(self, tank_angle, target_angle):
"""Find the angle remaining (in radians) between the tank and the target."""
tank_angle = self.normalize_angle(tank_angle)
target_angle = self.normalize_angle(target_angle)
# If the angles are on the same hemisphere, target - tank.
if tank_angle * target_angle > 0:
return target_angle - tank_angle
# Otherwise they are on opposite hemispheres.
positive_angle = max(tank_angle, target_angle)
negative_angle = min(tank_angle, target_angle)
tank_positive = True
if tank_angle < 0:
tank_positive = False
# Compare the angles to turn right and left.
right_angle = -1 * ( positive_angle - negative_angle )
left_angle = 2 * math.pi - positive_angle + negative_angle
if not tank_positive:
temp_angle = -1 * right_angle
right_angle = -1 * left_angle
left_angle = temp_angle
# Pick the smallest angle.
if abs(right_angle) <= abs(left_angle):
return right_angle
return left_angle
def normalize_angle(self, angle):
"""Make any angle be between +/- pi."""
angle -= 2 * math.pi * int (angle / (2 * math.pi))
if angle <= -math.pi:
angle += 2 * math.pi
elif angle > math.pi:
angle -= 2 * math.pi
return angle
