Added rotate slider

imagepointer.py

@@ -18,6 +18,7 @@ class ImagePointer:
         self.center_size = 10
         self.center_thickness = 3
         self.canvas_name = 'Image Pointer'
+        self.rotate = False
 
     # OpenCV callbacks
     def on_mouse_event(self, event, x, y, flags, param):
@@ -27,15 +28,16 @@ class ImagePointer:
             self.center_coord = np.array((x, y))
 
     def on_center_size_change(self, value):
-        global center_size
         if value > 0:
             self.center_size = value
 
     def on_center_thickness_change(self, value):
-        global center_thickness
         if value > 0:
             self.center_thickness = value
 
+    def on_rotate_changed(self, value):
+        self.rotate = value == 1
+
     def run(self):
         # Camera feed
         cam = cv2.VideoCapture(0)
@@ -55,6 +57,7 @@ class ImagePointer:
 
         cv2.createTrackbar('center size', self.canvas_name, self.center_size, 100, self.on_center_size_change)
         cv2.createTrackbar('center thickness', self.canvas_name, self.center_thickness, 16, self.on_center_thickness_change)
+        cv2.createTrackbar('rotate', self.canvas_name, 0, 1, self.on_rotate_changed)
 
         while True:
             # Capture the next frame from camera
@@ -66,10 +69,14 @@ class ImagePointer:
             # Acquire frame
             frame = frame_cam.astype(np.uint8)
 
+            # Rotate if needed
+            if self.rotate:
+                frame = cv2.rotate(frame, cv2.ROTATE_180)
+            
             ## Add cross
             frame = cv2.line(frame, self.center_coord - (0, self.center_size), self.center_coord + (0, self.center_size), (0, 0, 255,), self.center_thickness)
             frame = cv2.line(frame, self.center_coord - (self.center_size, 0), self.center_coord + (self.center_size, 0), (0, 0, 255,), self.center_thickness)
-            
+
             cv2.imshow(self.canvas_name, frame)
 
             # detect ESC key or if window is closeed