glass move along when head nodding left or right

app.py

@@ -54,22 +54,28 @@ def process_frame(frame):
             eye_center_x = (left_eye_x + right_eye_x) // 2
             eye_center_y = (left_eye_y + right_eye_y) // 2
 
+            # Calculate the angle of rotation
+            delta_x = right_eye_x - left_eye_x
+            delta_y = right_eye_y - left_eye_y
+            angle = np.degrees(np.arctan2(delta_y, delta_x))
+
             # Resize the overlay
             overlay_resize = cv2.resize(overlay, (int(w * 1.15), int(h * 0.8)))
 
-            # Ensure the frame is a NumPy array and writable
-            frame = np.array(frame)
+            # Rotate the overlay
+            overlay_center = (overlay_resize.shape[1] // 2, overlay_resize.shape[0] // 2)
+            rotation_matrix = cv2.getRotationMatrix2D(overlay_center, angle, 1.0)
+            overlay_rotated = cv2.warpAffine(overlay_resize, rotation_matrix, (overlay_resize.shape[1], overlay_resize.shape[0]), flags=cv2.INTER_LINEAR, borderMode=cv2.BORDER_CONSTANT, borderValue=(0, 0, 0, 0))
 
             # Calculate the position to center the glasses on the eyes
-            overlay_x = eye_center_x - overlay_resize.shape[1] // 2
-            overlay_y = eye_center_y - overlay_resize.shape[0] // 2  # Adjust vertical position
+            overlay_x = eye_center_x - overlay_rotated.shape[1] // 2
+            overlay_y = eye_center_y - overlay_rotated.shape[0] // 2  # Adjust vertical position
 
             # Overlay the glasses
             try:
-                frame = cvzone.overlayPNG(frame, overlay_resize, [overlay_x, overlay_y])
+                frame = cvzone.overlayPNG(frame, overlay_rotated, [overlay_x, overlay_y])
             except Exception as e:
                 print(f"Error overlaying glasses: {e}")
-
     return frame