main.py

import cv2
import cvzone
import random
from cvzone.HandTrackingModule import HandDetector
import time

cap = cv2.VideoCapture(0)
# scale down and crop it from size
cap.set(3,640)
cap.set(4,480)

detector = HandDetector(maxHands=1)
timer = 0
stateResult = False
startGame = False
scores = [0,0]  # [AI,player]

print("Welcome to Rock Paper Scissors")
print("Press s to play game and press b to exit match\n")

while True:
    imgBG = cv2.imread("Resources/BG.png")
    success,img = cap.read()

    imgScaled = cv2.resize(img,(0,0),None,0.875,0.875)  # 420/480
    imgScaled = imgScaled[:, 80:480]  # height:width

    # find hands
    hands, img = detector.findHands(imgScaled)  # with draw

    if startGame:
        if stateResult is False:
            timer = time.time()-initialTime      # initial time is when key s is pressed
            cv2.putText(imgBG,str(int(timer)),(605,435),cv2.FONT_HERSHEY_PLAIN,6,(255,0,255),4)
            # 6 is font and 4 is thickness. () is the position

            if timer>3:
                stateResult = True
                timer = 0

                if hands:
                    playerMove=None
                    hand = hands[0]
                    fingers = detector.fingersUp(hand)
                    if fingers == [0,0,0,0,0]:
                        playerMove = 1   # rock
                    if fingers == [1,1,1,1,1]:
                        playerMove = 2  # paper
                    if fingers == [0,1,1,0,0]:
                        playerMove = 3  # scissor

                    randomNumber = random.randint(1,3)
                    imgAI=cv2.imread(f'Resources/{randomNumber}.png',cv2.IMREAD_UNCHANGED)  # alpha value should be unchanged
                    imgBG = cvzone.overlayPNG(imgBG,imgAI,(149,310))

                    # Player Wins
                    if(playerMove == 1  and randomNumber == 3) or \
                            (playerMove == 2 and randomNumber == 1) or \
                            (playerMove == 3 and randomNumber == 2):
                        scores[1] += 1
                    # AI wins
                    if (playerMove == 3 and randomNumber == 1) or \
                            (playerMove == 1 and randomNumber == 2) or \
                            (playerMove == 2 and randomNumber == 3):
                        scores[0] += 1

                    if (playerMove == 1): print("Rock")
                    elif (playerMove == 2): print("Paper")
                    elif (playerMove == 3): print("Scissor")
                    else: print("Invalid Sign")

                    # print(fingers)
                    # display an array with 0 and 1 of size 5 [thumb,index,middle,ring,pinky]

    imgBG[234:654, 795:1195] = imgScaled
    if stateResult:
        imgBG = cvzone.overlayPNG(imgBG, imgAI, (149, 310))

    cv2.putText(imgBG, str(scores[0]), (410, 215), cv2.FONT_HERSHEY_PLAIN, 4, (255, 255, 255), 6)
    cv2.putText(imgBG, str(scores[1]), (1112, 215), cv2.FONT_HERSHEY_PLAIN, 4, (255, 255, 255), 6)

    # cv2.imshow("Image",img)
    cv2.imshow("BG",imgBG)
    # cv2.imshow("Scaled",imgScaled)

    key = cv2.waitKey(1)
    if key == ord('s'):
        startGame = True
        initialTime = time.time()
        stateResult = False

    # press b to break out
    if key == ord('b'):
        print("\nFinal Score")
        print(str(scores[0]) + "-" + str(scores[1]))

        if scores[0] > scores[1]:
            print("AI won")
        elif scores[0] < scores[1]:
            print("You won")
        else:
            print("It's a Tie")

        break



# we can make AI win as per symbol of user  (cheating)