class Move:
def __init__(self):
# initialize the status
self.dist = 1
self.dist_prev = 2
self.act_prev = 'r'
# init motors, establish bluetooth
self.motors = Motors()
self.motors.arm_move((90,90))
def targetDist(self,targetCenter, imgCenter):
# range from 0 to 1
h = float(imgCenter[0]-targetCenter[0])/imgCenter[0]
v = float(imgCenter[1]-targetCenter[1])/imgCenter[1]
return h
def findmarker(self, img):
# return > 0 to end finding process
print self.dist
if abs(self.dist)>abs(self.dist_prev):
# the result got worse
if self.act_prev == 'r':
self.act = 'l'
if self.act_prev == 'l':
self.act = 'r'
if abs(self.dist)<=abs(self.dist_prev):
# the result got better or same, keep doing
self.act = self.act_prev
self.motors.turn(self.act)
import time
time.sleep(0.1)
self.act_prev = self.act
self.dist_prev = self.dist
mlist = marker().find(img, debug = 0, show = 0)
#default dist, which means the not found response
if len(mlist)==1:
num, pos = mlist[0]
center = tuple(np.int0( np.mean( pos.reshape(4,2), axis = 0)))
img_center = tuple( img.shape[:2])
img_center = (img_center[1]/2, img_center[0]/2)
self.dist = self.targetDist(center, img_center)
else:
self.dist = 2
return 0