import numpy as np
import cv2

# ----- Helper Functions -----
def compute_distance(p1, p2):
    return np.hypot(p2[0] - p1[0], p2[1] - p1[1])

# 4) compute straightness per finger
def finger_straight(i_tip, i_pip, i_mcp):
    d1 = np.hypot(*(np.array(i_tip)-np.array(i_pip)))
    d2 = np.hypot(*(np.array(i_pip)-np.array(i_mcp)))
    return float(np.clip(d1/(d2+1e-3), 0, 1))

def yes_no():
    while True:
        key = cv2.waitKey(1) & 0xFF

        if key == ord("y"):
            return True
        if key == ord("n"):
            return False