import cv2

mark_color = (150, 250, 250)
mark_thick = 2

bbox_color = (0, 0, 255)
bbox_thick = 2

track_mode = False
height = 0
width = 0
channels = 0

def createTreker():
    return cv2.TrackerMIL_create()  # метод Multiple Instance Learning
    #return cv2.legacy.TrackerMOSSE_create()  # Minimum Output Sum of Squared Error
    #return cv2.TrackerGOTURN_create() # Neural network

def drawMark():
    cv2.line(img, (bbox_x, bbox_y), (int(bbox_x+bbox_w/4), bbox_y), mark_color, mark_thick)
    cv2.line(img, (bbox_x+bbox_w, bbox_y), (int(bbox_x+bbox_w-bbox_w/4), bbox_y), mark_color, mark_thick)

    cv2.line(img, (bbox_x, bbox_y+bbox_h), (int(bbox_x+bbox_w/4), bbox_y+bbox_h), mark_color, mark_thick)
    cv2.line(img, (bbox_x+bbox_w, bbox_y+bbox_h), (int(bbox_x+bbox_w-bbox_w/4), bbox_y+bbox_h), mark_color, mark_thick)

    cv2.line(img, (bbox_x, bbox_y), (bbox_x, int(bbox_y+bbox_h/4)), mark_color, mark_thick)
    cv2.line(img, (bbox_x+bbox_w, bbox_y), (bbox_x+bbox_w, int(bbox_y+bbox_h/4)), mark_color, mark_thick)

    cv2.line(img, (bbox_x, bbox_y+bbox_h), (bbox_x, int(bbox_y+bbox_h-bbox_h/4)), mark_color, mark_thick)
    cv2.line(img, (bbox_x+bbox_w, bbox_y+bbox_h), (bbox_x+bbox_w, int(bbox_y+bbox_h-bbox_h/4)), mark_color, mark_thick)

def drawBox():
    cv2.rectangle(img, (int(bbox[0]), int(bbox[1])), (int(bbox[0] + bbox[2]), int(bbox[1] + bbox[3])), bbox_color, bbox_thick, 1)

def doAction():
    objX = int(bbox[0] + bbox[2]/2)
    objY = int(bbox[1] + bbox[3]/2)
    startX = int(width/2)
    startY = int(height/2)
    cv2.line(img, (startX, startY), (objX, startY), (0,255,0), 2)
    cv2.line(img, (startX, startY), (startX, objY), (0,255,0), 2)


tracker = createTreker()

cap = cv2.VideoCapture(0)

#frame_width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
#frame_height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))

success, img = cap.read()
if success:
    height, width, channels = img.shape
    bbox_w = int(width/5)
    bbox_x = int(width/2 - bbox_w/2)
    bbox_h = int(height/5)
    bbox_y = int(height/2 - bbox_h/2)
    bbox = (bbox_x, bbox_y, bbox_w, bbox_h)

while True:
    timer = cv2.getTickCount()

    success, img = cap.read()
    if not success:
        break

    drawMark()

    if track_mode == True:
        success, bbox = tracker.update(img)
        if success:
            drawBox()
            doAction()
        else:
            cv2.putText(img, "Lost", (5, 50), cv2.FONT_HERSHEY_SIMPLEX, 0.7, (0, 0, 255), 2)

    fps = cv2.getTickFrequency() / (cv2.getTickCount() - timer)
    cv2.putText(img, str(int(fps)), (5, 25), cv2.FONT_HERSHEY_SIMPLEX, 0.7, (0, 0, 255), 2)

    cv2.imshow("Tracking", img)

    key = cv2.waitKey(1)
    if key & 0xff == ord(' '):
        track_mode = not track_mode
        if track_mode == True:
            bbox=(bbox_x, bbox_y, bbox_w, bbox_h)
            tracker = createTreker()
            tracker.init(img, bbox)
    if key & 0xff == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()