angle in opencv

angle_.idea_angle.iml

<?xml version="1.0" encoding="UTF-8"?>
<module type="PYTHON_MODULE" version="4">
  <component name="NewModuleRootManager">
    <content url="file://$MODULE_DIR$" />
    <orderEntry type="inheritedJdk" />
    <orderEntry type="sourceFolder" forTests="false" />
  </component>
  <component name="TestRunnerService">
    <option name="PROJECT_TEST_RUNNER" value="Unittests" />
  </component>
</module>

angle_.idea_inspectionProfiles_profiles_settings.xml

<component name="InspectionProjectProfileManager">
  <settings>
    <option name="useProjectProfile" value="false" />
    <option name="USE_PROJECT_PROFILE" value="false" />
    <version value="1.0" />
  </settings>
</component>

angle_.idea_misc.xml

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="ProjectRootManager" version="2" project-jdk-name="Python 2.7.12 virtualenv at ~/.virtualenvs/cv" project-jdk-type="Python SDK" />
</project>

angle_.idea_modules.xml

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="ProjectModuleManager">
    <modules>
      <module fileurl="file://$PROJECT_DIR$/.idea/angle.iml" filepath="$PROJECT_DIR$/.idea/angle.iml" />
    </modules>
  </component>
</project>

angle_main.py

import cv2
import numpy as np
import math
a=1
class ImageCallback:
    def __init__(self):
        self.image = None

    def update(self, image):
        self.image = image

    def is_clicked(self):
        return len(self.hues) > 0

    def mouse_callback(self, event, x, y, m, n):
        if self.image is not None:

            if event == cv2.EVENT_LBUTTONDOWN:
                print x, y

def calculate_angle(point_a, point_b):
    dis_y = point_a[1] - point_b[1]
    dis_x = point_a[0] - point_b[0]
    angle = math.atan2(dis_y, dis_x)
    angle = math.degrees(angle)
    # lets reverse axis because (0,0) from image
    # is not equal to real (0,0) in math
    angle *= -1
    if angle < 0:
        angle += 360

    return int(angle)


def callback(event, x, y, flags, param):
    param[0] = x
    param[1] = y

xypos = ImageCallback()
width = 1000
height = 1000
radius = 10
cap = cv2.VideoCapture(0)
target = [width / 2, height / 2]
center = (100, 100)
original = np.zeros((height, width, 3), np.uint8)
cv2.namedWindow("image", cv2.WINDOW_NORMAL)
cv2.circle(original, center, radius, (200, 100, 100), 2)
while True:
    image = original.copy()
    _, image = cap.read()
    print "click on center of object"
    cv2.setMouseCallback("image", xypos.mouse_callback)
    xypos.update(image)
    for i in range(90000):
        print "geting pos"
        cv2.imshow("image", image)
    cv2.setMouseCallback("image", callback, param=target)
    cv2.setMouseCallback("image", callback, param=target)
    cv2.circle(image, tuple(target), radius, (50, 100, 0), 10)
    cv2.line(image, tuple(target), center, (0, 0, 200), 2)
    print calculate_angle(target, center)
    #xypos.update(image)
    cv2.imshow("image", image)
    key = cv2.waitKey(1) & 0xFF
    if key == 27:
        break

cv2.destroyAllWindows()