346 lines
11 KiB
Python
346 lines
11 KiB
Python
from __future__ import print_function
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from __future__ import division
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from threading import Thread
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from math import pi, tan, asin, radians
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from time import sleep, time, strftime
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from collections import deque
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from .imagereaders import NaoImageReader
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from .finders import BallFinder, GoalFinder, FieldFinder
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from .movements import NaoMover
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from naoqi import ALProxy
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class Striker(object):
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def __init__(self, nao_ip, nao_port, res, ball_hsv, goal_hsv, field_hsv,
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ball_min_radius):
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# Timestamp
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self.run_id = strftime('%Y%m%d%H%M%S')
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# Motion
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self.mover = NaoMover(nao_ip=nao_ip, nao_port=nao_port)
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self.is_over = False
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# Sight
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self.upper_camera = NaoImageReader(
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nao_ip, port=nao_port, res=res, fps=10, cam_id=0,
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)
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self.lower_camera = NaoImageReader(
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nao_ip, port=nao_port, res=1, fps=10, cam_id=1,
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)
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# POV
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self.upper_pov = NaoImageReader(
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nao_ip, port=nao_port, res=1, fps=10, cam_id=0,
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video_file='./cam0_' + self.run_id + '.avi'
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)
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self.lower_pov = NaoImageReader(
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nao_ip, port=nao_port, res=1, fps=10, cam_id=1,
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video_file='./cam1_' + self.run_id + '.avi'
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)
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self.pov_thread = Thread(target=self._pov)
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self.pov_thread.start()
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# Recognition
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self.ball_finder = BallFinder(tuple(ball_hsv[0]), tuple(ball_hsv[1]),
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ball_min_radius)
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self.field_finder = FieldFinder(tuple(field_hsv[0]),
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tuple(field_hsv[1]))
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self.goal_finder = GoalFinder(tuple(goal_hsv[0]), tuple(goal_hsv[1]))
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# Talking
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self.speaker = ALProxy('ALTextToSpeech', bytes(nao_ip), nao_port)
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self.speach_queue = deque(maxlen=4)
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self.speach_history = []
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self.tts_thread = Thread(target=self._speaker)
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self.tts_thread.start()
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# Debugging
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self._timer_start = 0
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self._timer_stop = 0
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def close(self):
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self.is_over = True
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if self.tts_thread.isAlive():
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self.tts_thread.join()
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if self.pov_thread.isAlive():
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self.pov_thread.join()
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self.upper_camera.close()
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self.lower_camera.close()
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self.upper_pov.close()
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self.lower_pov.close()
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self.mover.stop_moving()
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def _speaker(self):
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while not self.is_over:
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while self.speach_queue:
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self.speaker.say(self.speach_queue.pop())
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sleep(0.5)
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def _pov(self):
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while not self.is_over:
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try:
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self.upper_pov.get_frame()
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self.lower_pov.get_frame()
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sleep(0.1)
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except RuntimeError as e:
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print(e)
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continue
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def speak(self, text):
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if not self.speach_history or self.speach_history[-1] != text:
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self.speach_queue.appendleft(text)
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self.speach_history.append(text)
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def scan_rotation(self):
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"""Intelligently rotate the robot to search for stuff."""
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self.mover.stop_moving()
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self.rotating = False
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yaw = self.mover.get_head_angles()[0]
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mag = yaw
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# determine direction of head rotation
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sign = 1 if yaw >= 0 else -1
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# the robot starts to move arround his z-Axis in the direction where his
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# head is aligned when the head yaw angle has reached his maximum
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if mag > 0.8:
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self.mover.set_head_angles(-pi / 8, 0, 0.5)
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sleep(0.5)
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elif mag < -0.8:
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self.mover.move_to_fast(0, 0, -pi / 4)
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self.mover.wait()
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#self.speak("Where is the ball? I am searching for it")
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# rotate head to the left, if head yaw angle is equally zero or larger
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# rotate head to the right, if head yaw angle is smaller than zero
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else:
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#self.speak("I have found the ball")
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self.mover.change_head_angles(sign * pi / 8, 0, 0.5)
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sleep(0.3)
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def get_ball_angles_from_camera(self, cam, mask=True):
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"""Detect the ball and return its angles in camera coordinates."""
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try:
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frame = cam.get_frame()
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except RuntimeError as e: # Sometimes camera doesn't return an image
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print(e)
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return None
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if cam == self.lower_camera:
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mask = False
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if mask:
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field = self.field_finder.find(frame)
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frame = self.field_finder.mask_it(frame, field)
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ball = self.ball_finder.find(frame)
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if ball is None:
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return None
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(x, y), _ = ball
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x, y = cam.to_relative(x, y)
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x, y = cam.to_angles(x, y)
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return x, y
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def get_goal_center_angle_from_camera(self, cam, mask=True):
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try:
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frame = cam.get_frame()
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except RuntimeError as e: # Sometimes camera doesn't return an image
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print(e)
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return None
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if mask:
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field = self.field_finder.find(frame)
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frame = self.field_finder.mask_it(frame, field, inverse=True)
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goal = self.goal_finder.find(frame)
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if goal is None:
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return None
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goal_x = self.goal_finder.goal_center(goal)
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goal_x, _ = cam.to_relative(goal_x, 0)
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goal_x, _ = cam.to_angles(goal_x, 0)
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return goal_x
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def distance_to_ball(self):
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angles = self.get_ball_angles_from_camera(self.upper_camera)
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if angles == None:
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raise ValueError('No ball in sight')
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y_angle = angles[1]
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y_angle = pi/2 - y_angle - radians(15)
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return 0.5 * tan(y_angle)
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def walking_direction(self, lr, d):
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return asin(0.5 / d) * lr
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def ball_tracking(self, soll=0, tol=0.15):
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"""Track the ball using the feed from top and bottom camera.
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Returns
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-------
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bool
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True if robot is nicely aligned to ball; else False.
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"""
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ball_locked = False
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while not ball_locked:
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# visibility check
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for i in range(3):
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cams = [self.upper_camera, self.lower_camera]
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in_sight = False
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for cam in cams:
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ball_angles = self.get_ball_angles_from_camera(cam)
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if ball_angles is not None:
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x, y = ball_angles
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self._timer_start = time()
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in_sight = True
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break
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if in_sight:
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break
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# stop visibility check
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if not in_sight:
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self.speak('No ball visible search it')
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self.scan_rotation()
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continue
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# self.speak('I see the ball')
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ball_locked = self.turn_to_ball(x, y, soll=soll, tol=tol)
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print()
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def run_to_ball(self, d):
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self.mover.move_to(d, 0, 0)
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# self.mover.wait()
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def turn_to_ball(self, ball_x, ball_y, tol=0.15, soll=0):
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"""Align robot to the ball.
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If head is not centered at the ball (within tolerance), then
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turn head to ball. If after that the angle of head to body
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becomes too big, rotate the body by the head angle and
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simultaneously rotate head into 0 position to achieve alignment.
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"""
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# only the x ball angle is relevant for alignment
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d_yaw, d_pitch = ball_x, 0
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print('ball yaw in camera:', d_yaw)
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# center head at the ball
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if (abs(d_yaw) > 0.01):
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self.mover.change_head_angles(d_yaw, d_pitch,
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min(1, abs(d_yaw) * 1.25))
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sleep(0.1)
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head_yaw, head_pitch = self.mover.get_head_angles()
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self._timer_stop = time()
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print('Ball to head', self._timer_stop - self._timer_start)
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print('Head yaw', head_yaw, end=' ')
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d_yaw = head_yaw - soll
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print('Head d_yaw', d_yaw)
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print('Allowed tolerance', tol)
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if abs(d_yaw) > tol:
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self.mover.stop_moving()
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print('Going to rotate by', d_yaw)
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self.speak('Going to rotate')
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self.mover.set_head_angles(soll, head_pitch, 0.3)
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self.mover.move_to(0, 0, d_yaw)
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self.mover.wait()
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return False
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else:
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print('Ball locked')
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return True
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def align_to_ball(self):
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ball_angles = self.get_ball_angles_from_camera(self.lower_camera,
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mask=False)
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if ball_angles is None:
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raise ValueError('No ball')
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x, y = ball_angles
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goal_x, goal_y = 0.095, 0.4
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dx, dy = goal_x - x, goal_y - y
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dx = -dx * 0.2 if abs(dx) > 0.05 else 0
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dy = dy * 0.3 if abs(dy) > 0.05 else 0
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if dx == 0 and dy == 0:
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return True
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print('Moving to dxdy', dx, dy)
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self.mover.move_to(dy, dx, 0)
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self.mover.wait()
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return False
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def align_to_goal(self):
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ball_angles = self.get_ball_angles_from_camera(self.lower_camera,
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mask=False)
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if ball_angles is None:
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self.mover.move_to(-0.1, 0, 0)
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self.mover.wait()
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ball_angles = self.get_ball_angles_from_camera(self.lower_camera,
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mask=False)
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if ball_angles is None:
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self.speak("Cannot see the ball")
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raise ValueError('No ball')
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x, y = ball_angles
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print(x, y)
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self.speak("Turn to ball")
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self.turn_to_ball(x, y, tol=0.15)
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self.speak('Trying to find the goal')
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sleep(0.2)
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goal_center_x = self.goal_search()
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self.speak('Goal found')
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print('Goal center:', goal_center_x)
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if goal_center_x is not None and abs(goal_center_x) < 0.1:
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self.speak("Goal and ball are aligned")
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print('Goal ball aligned!')
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#raise SystemExit
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return True
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if y > 0.35:
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self.mover.move_to(-0.05, 0, 0)
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self.mover.wait()
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# return False
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elif y < 0.25:
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self.mover.move_to(0.05, 0, 0)
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self.mover.wait()
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# return False
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sign = -1 if goal_center_x > 0 else 1
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num_steps = int(min(abs(goal_center_x), 0.1) // 0.05)
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for _ in range(num_steps):
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self.mover.move_to(0, 0.05 * sign, 0)
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self.mover.wait()
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return False
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def goal_search(self):
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goal_center_x = None
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positions = [0, pi/6, pi/4, pi/3, pi/2]
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angles = [-p for p in positions] + [p for p in positions][1:]
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for angle in angles:
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self.mover.set_head_angles(angle, 0)
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sleep(0.5)
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for i in range(5):
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print(i, goal_center_x)
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if goal_center_x is None:
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gcx = self.get_goal_center_angle_from_camera(
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self.upper_camera
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)
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goal_center_x = gcx + angle if gcx is not None else None
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print('Goal found: ' + str(goal_center_x)
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if goal_center_x is not None
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else 'Goal not found at ' + str(angle))
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if goal_center_x is not None:
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self.mover.set_head_angles(0, 0)
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return goal_center_x
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self.mover.set_head_angles(0, 0)
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return None
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