116 lines
3.1 KiB
Python
116 lines
3.1 KiB
Python
import time
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import numpy as np
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import cv2
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import robot
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LANDMARKS = [7,11,10,6] # SET ARUCO NUMBERS
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POWER = 70
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TURN_T = 5 # 1 degree
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DRIVE_T = 22 # 1 centimeter
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RIGHT_WHEEL_OFFSET = 4
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CLOCKWISE_OFFSET = 0.96
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FOCAL_LENGTH = 1691
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CAMERA_MATRIX = np.array(
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[[FOCAL_LENGTH,0,512],[0,FOCAL_LENGTH,360],[0,0,1]],
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dtype=np.float32
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)
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DIST_COEF = np.array([0,0,0,0,0], dtype=np.float32)
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def find_aruco(image):
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aruco_dict = cv2.aruco.Dictionary_get(cv2.aruco.DICT_6X6_250)
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aruco_params = cv2.aruco.DetectorParameters_create()
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corners, ids, _ = cv2.aruco.detectMarkers(
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image,
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aruco_dict,
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parameters=aruco_params
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)
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if corners is None:
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return []
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return {ids[i][0]: box[0] for i, box in enumerate(corners)}
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def careful_forward(drive_time, arlo, careful_range = 600):
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start = time.time()
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end = start + drive_time
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turning = None
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hit_something = False
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while time.time() < end:
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forward_dist = arlo.read_front_ping_sensor()
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right_dist = arlo.read_right_ping_sensor()
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left_dist = arlo.read_left_ping_sensor()
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if forward_dist > careful_range and all(x > 400 for x in [right_dist, left_dist]):
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turning = None
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arlo.go_diff(POWER, POWER + RIGHT_WHEEL_OFFSET, 1, 1)
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else:
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hit_something = True
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if turning == "R" or (forward_dist > careful_range and right_dist > 400 and turning is None):
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arlo.go_diff(POWER, POWER, 1, 0)
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turning = "R"
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else:
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arlo.go_diff(POWER, POWER + RIGHT_WHEEL_OFFSET, 0, 1)
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turning = "L"
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time.sleep(0.01)
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return hit_something
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def main():
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landmark_order = LANDMARKS + [
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LANDMARKS[0]
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]
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noah = robot.Robot()
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while landmark_order != []:
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landmark = landmark_order.pop(0)
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print(f"looking for landmark {landmark}")
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while True:
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while True:
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for _ in range(24):
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arucos = find_aruco(noah.take_photo())
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if landmark in arucos:
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break
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noah.go_diff(POWER, POWER, 0, 1)
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time.sleep((20 * TURN_T)/1000)
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noah.stop()
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if landmark in arucos:
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break
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careful_forward(3, noah)
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position = cv2.aruco.estimatePoseSingleMarkers(
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np.array([arucos[landmark]]), 14.5, CAMERA_MATRIX, DIST_COEF
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)[1][0][0]
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angle = np.rad2deg(np.arctan(position[0]/position[2]))
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drive_distance = np.sqrt(position[0]**2 + position[2]**2) - 30
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if drive_distance < 30:
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break
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if angle < 0:
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noah.go_diff(POWER, POWER, 0, 1)
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time.sleep((abs(angle) * TURN_T)/1000)
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noah.stop()
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else:
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noah.go_diff(POWER, POWER, 1, 0)
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time.sleep((abs(angle) * TURN_T * CLOCKWISE_OFFSET)/1000)
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noah.stop()
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if not careful_forward((drive_distance * DRIVE_T)/1000, noah, 400):
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break
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if __name__ == "__main__":
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main()
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