flappy.py

from itertools import cycle
import random
import sys
import pygame
from pygame.locals import *
from Logic import *
from birdPool import *
import time

from config import FPS,SCREENWIDTH,SCREENHEIGHT,PIPEGAPSIZE,BASEY,NUM_BIRDS,NUM_GENERATIONS,XBIRD,PLAYERS_LIST,\
BACKGROUNDS_LIST, PIPES_LIST

# image, sound and hitmask  dicts
IMAGES, SOUNDS, HITMASKS = {}, {}, {}
logic = Logic(NUM_BIRDS, XBIRD)

try:
    xrange
except NameError:
    xrange = range


def main():
    global SCREEN, FPSCLOCK
    pygame.init()
    FPSCLOCK = pygame.time.Clock()
    SCREEN = pygame.display.set_mode((SCREENWIDTH, SCREENHEIGHT))
    pygame.display.set_caption('Flappy Bird')
    # numbers sprites for score display
    IMAGES['numbers'] = (
        pygame.image.load('assets/sprites/0.png').convert_alpha(),
        pygame.image.load('assets/sprites/1.png').convert_alpha(),
        pygame.image.load('assets/sprites/2.png').convert_alpha(),
        pygame.image.load('assets/sprites/3.png').convert_alpha(),
        pygame.image.load('assets/sprites/4.png').convert_alpha(),
        pygame.image.load('assets/sprites/5.png').convert_alpha(),
        pygame.image.load('assets/sprites/6.png').convert_alpha(),
        pygame.image.load('assets/sprites/7.png').convert_alpha(),
        pygame.image.load('assets/sprites/8.png').convert_alpha(),
        pygame.image.load('assets/sprites/9.png').convert_alpha()
    )

    # game over sprite
    IMAGES['gameover'] = pygame.image.load('assets/sprites/gameover.png').convert_alpha()
    # message sprite for welcome screen
    IMAGES['message'] = pygame.image.load('assets/sprites/message.png').convert_alpha()
    # base (ground) sprite
    IMAGES['base'] = pygame.image.load('assets/sprites/base.png').convert_alpha()

    # sounds
    if 'win' in sys.platform:
        soundExt = '.wav'
    else:
        soundExt = '.ogg'

    SOUNDS['die']    = pygame.mixer.Sound('assets/audio/die' + soundExt)
    SOUNDS['hit']    = pygame.mixer.Sound('assets/audio/hit' + soundExt)
    SOUNDS['point']  = pygame.mixer.Sound('assets/audio/point' + soundExt)
    SOUNDS['swoosh'] = pygame.mixer.Sound('assets/audio/swoosh' + soundExt)
    SOUNDS['wing']   = pygame.mixer.Sound('assets/audio/wing' + soundExt)

    while True:
        # select random background sprites
        randBg = random.randint(0, len(BACKGROUNDS_LIST) - 1)
        IMAGES['background'] = pygame.image.load(BACKGROUNDS_LIST[randBg]).convert()
        IMAGES['players'] = []
        for i in range(NUM_BIRDS):
            # select random player sprites
            randPlayer = random.randint(0, len(PLAYERS_LIST) - 1)
            image_tuple = (
                pygame.image.load(PLAYERS_LIST[randPlayer][0]).convert_alpha(),
                pygame.image.load(PLAYERS_LIST[randPlayer][1]).convert_alpha(),
                pygame.image.load(PLAYERS_LIST[randPlayer][2]).convert_alpha(),
            )
            IMAGES['players'].append(image_tuple)

        # select random pipe sprites
        pipeindex = random.randint(0, len(PIPES_LIST) - 1)
        IMAGES['pipe'] = (
            pygame.transform.flip(
                pygame.image.load(PIPES_LIST[pipeindex]).convert_alpha(), False, True),
            pygame.image.load(PIPES_LIST[pipeindex]).convert_alpha(),
        )

        # hitmask for pipes
        HITMASKS['pipe'] = (
            getHitmask(IMAGES['pipe'][0]),
            getHitmask(IMAGES['pipe'][1]),
        )
        HITMASKS['players'] = []

        for tuple_images in IMAGES['players']:
            # hitmask for player
            mask_tuple = (
                getHitmask(tuple_images[0]),
                getHitmask(tuple_images[1]),
                getHitmask(tuple_images[2]),
            )
            HITMASKS['players'].append(mask_tuple)

        movementInfo = showWelcomeAnimation()
        # run NUM_GENERATIONS times
        for generation in range(NUM_GENERATIONS):
            birdPool = logic.nextGeneration()
            crashInfo = mainGame(movementInfo, birdPool, generation)
        best_rate = logic.environment.rateBirds()[0]
        best_bird = logic.environment.currentGeneration[best_rate[0]]
        torch.save(best_bird,"best_mode.pth")
        showGameOverScreen(crashInfo)


def showWelcomeAnimation():
    """Shows welcome screen animation of flappy bird"""
    # index of player to blit on screen
    playerIndex = 0
    playerIndexGen = cycle([0, 1, 2, 1])
    # iterator used to change playerIndex after every 5th iteration
    loopIter = 0

    
    playerx = int(SCREENWIDTH * 0.2)
    playery = int((SCREENHEIGHT - IMAGES['players'][0][0].get_height()) / 2)
    

    messagex = int((SCREENWIDTH - IMAGES['message'].get_width()) / 2)
    messagey = int(SCREENHEIGHT * 0.12)

    basex = 0
    # amount by which base can maximum shift to left
    baseShift = IMAGES['base'].get_width() - IMAGES['background'].get_width()

    # player shm for up-down motion on welcome screen
    playerShmVals = {'val': 0, 'dir': 1}

    while True:
        for event in pygame.event.get():
            if event.type == QUIT or (event.type == KEYDOWN and event.key == K_ESCAPE):
                pygame.quit()
                sys.exit()
            if event.type == KEYDOWN and (event.key == K_SPACE or event.key == K_UP):
                # make first flap sound and return values for mainGame
                SOUNDS['wing'].play()
                return {
                    'playery': playery + playerShmVals['val'],
                    'basex': basex,
                    'playerIndexGen': playerIndexGen,
                }

        # adjust playery, playerIndex, basex
        if (loopIter + 1) % 5 == 0:
            playerIndex = next(playerIndexGen)
        loopIter = (loopIter + 1) % 30
        basex = -((-basex + 4) % baseShift)
        playerShm(playerShmVals)

        # draw sprites
        SCREEN.blit(IMAGES['background'], (0,0))
        for image_tuple in IMAGES['players']:
            SCREEN.blit(image_tuple[playerIndex],
                        (playerx, playery + playerShmVals['val']))
        SCREEN.blit(IMAGES['message'], (messagex, messagey))
        SCREEN.blit(IMAGES['base'], (basex, BASEY))

        pygame.display.update()
        FPSCLOCK.tick(FPS)


def mainGame(movementInfo, birdPool: BirdPool, generation):
    playerIndex = loopIter = 0
    playerIndexGen = movementInfo['playerIndexGen']

    # playerx, playery = int(SCREENWIDTH * 0.2), movementInfo['playery']
    for bird in birdPool.birds:
        bird.x, bird.y = int(SCREENWIDTH * 0.2), movementInfo['playery']
        bird.score = 0

    basex = movementInfo['basex']
    baseShift = IMAGES['base'].get_width() - IMAGES['background'].get_width()

    # get 2 new pipes to add to upperPipes lowerPipes list
    newPipe1 = getRandomPipe()
    newPipe2 = getRandomPipe()

    # list of upper pipes
    upperPipes = [
        {'x': SCREENWIDTH + 200, 'y': newPipe1[0]['y']},
        {'x': SCREENWIDTH + 200 + (SCREENWIDTH / 2), 'y': newPipe2[0]['y']},
    ]

    # list of lowerpipe
    lowerPipes = [
        {'x': SCREENWIDTH + 200, 'y': newPipe1[1]['y']},
        {'x': SCREENWIDTH + 200 + (SCREENWIDTH / 2), 'y': newPipe2[1]['y']},
    ]
    surfaces = []
    dt = FPSCLOCK.tick(FPS)/1000
    pipeVelX = -128 * dt
    last_time = time.time()
    crashed_birds = []
    start_time = time.time()
    while True:
        pygame.event.pump()
        # a x seconds passed then ask the model if to flap or not
        if time.time() - last_time >= 0.3:
            last_time = time.time()
            birds_events = logic.passBirdInfo(upperPipes,lowerPipes,birdPool)
            # print(birds_events)
            for i in range(len(birds_events)):
                birdEvent = birds_events[i]
                if birdEvent == True:
                    if birdPool.birds[i].y > -2 * IMAGES['players'][i][0].get_height():
                        birdPool.birds[i].VelY = birdPool.birds[i].FlapAcc
                        birdPool.birds[i].Flapped = True
                        SOUNDS['wing'].play()
        for i in range(birdPool.birdNum):
            bird = birdPool.birds[i]
            if bird.id in crashed_birds:
                continue
            # check for crash here
            crashTest = checkCrash({'x': bird.x, 'y': bird.y, 'index': playerIndex, 'id': bird.id},
                                upperPipes, lowerPipes)
            
            if crashTest[0]:
                crashInfo = {
                    'y': bird.y,
                    'groundCrash': crashTest[1],
                    'basex': basex,
                    'upperPipes': upperPipes,
                    'lowerPipes': lowerPipes,
                    'score': bird.score,
                    'playerVelY': bird.VelY,
                    'playerRot': bird.Rot,
                    'id': bird.id,
                    'survive_time': abs(time.time() - start_time),
                }
                logic.reportCrash(crashInfo)
                crashed_birds.append(bird.id)
                continue
                
            # check for score
            playerMidPos = bird.x + IMAGES['players'][i][0].get_width() / 2
            for pipe in upperPipes:
                pipeMidPos = pipe['x'] + IMAGES['pipe'][0].get_width() / 2
                if pipeMidPos <= playerMidPos < pipeMidPos + 4:
                    bird.score += 1
                    SOUNDS['point'].play()

            # playerIndex basex change
            if (loopIter + 1) % 3 == 0:
                playerIndex = next(playerIndexGen)
            loopIter = (loopIter + 1) % 30
            basex = -((-basex + 100) % baseShift)
        
            # rotate the player
            if bird.Rot > -90:
                bird.Rot -= bird.VelRot
        
            # player's movement
            if bird.VelY < bird.MaxVelY and not bird.Flapped:
                bird.VelY += bird.AccY
            if bird.Flapped:
                bird.Flapped = False

            # more rotation to cover the threshold (calculated in visible rotation)
            bird.Rot = 45

            playerHeight = IMAGES['players'][i][playerIndex].get_height()
            bird.y += min(bird.VelY, BASEY - bird.y - playerHeight)

            # Player rotation has a threshold
            visibleRot = bird.RotThr
            if bird.Rot <= bird.RotThr:
                visibleRot = bird.Rot
            
            if len(surfaces) < birdPool.birdNum:
                playerSurface = pygame.transform.rotate(IMAGES['players'][i][playerIndex], visibleRot)
                surfaces.append(playerSurface)
            else:
                surfaces[i] = pygame.transform.rotate(IMAGES['players'][i][playerIndex], visibleRot)
            # bird.y = int(SCREENHEIGHT * 0.2)
            # print(bird.y, int(SCREENHEIGHT * 0.2))

        # remove crashed birds
        if len(crashed_birds) == birdPool.birdNum:
            return crashInfo
        # move pipes to left
        for uPipe, lPipe in zip(upperPipes, lowerPipes):
            uPipe['x'] += pipeVelX
            lPipe['x'] += pipeVelX

        # add new pipe when first pipe is about to touch left of screen
        if 3 > len(upperPipes) > 0 and 0 < upperPipes[0]['x'] < 5:
            newPipe = getRandomPipe()
            upperPipes.append(newPipe[0])
            lowerPipes.append(newPipe[1])

        # remove first pipe if its out of the screen
        if len(upperPipes) > 0 and upperPipes[0]['x'] < -IMAGES['pipe'][0].get_width():
            upperPipes.pop(0)
            lowerPipes.pop(0)

        # draw sprites
        SCREEN.blit(IMAGES['background'], (0,0))

        for uPipe, lPipe in zip(upperPipes, lowerPipes):
            SCREEN.blit(IMAGES['pipe'][0], (uPipe['x'], uPipe['y']))
            SCREEN.blit(IMAGES['pipe'][1], (lPipe['x'], lPipe['y']))

        SCREEN.blit(IMAGES['base'], (basex, BASEY))
        for i in range(len(surfaces)):
            SCREEN.blit(surfaces[i], (birdPool.birds[i].x, birdPool.birds[i].y))

        # print score so player overlaps the score
        # showScore(score)
        showGeneration(generation)

        pygame.display.update()
        FPSCLOCK.tick(FPS)


def showGameOverScreen(crashInfo):
    """crashes the player down and shows gameover image"""
    score = crashInfo['score']
    playerx = SCREENWIDTH * 0.2
    playery = crashInfo['y']
    playerHeight = IMAGES['players'][0][0].get_height()
    playerVelY = crashInfo['playerVelY']
    playerAccY = 2
    playerRot = crashInfo['playerRot']
    playerVelRot = 7

    basex = crashInfo['basex']

    upperPipes, lowerPipes = crashInfo['upperPipes'], crashInfo['lowerPipes']

    # play hit and die sounds
    SOUNDS['hit'].play()
    if not crashInfo['groundCrash']:
        SOUNDS['die'].play()
    while True:
        for event in pygame.event.get():
            if event.type == QUIT or (event.type == KEYDOWN and event.key == K_ESCAPE):
                pygame.quit()
                sys.exit()
            if event.type == KEYDOWN and (event.key == K_SPACE or event.key == K_UP):
                if playery + playerHeight >= BASEY - 1:
                    return

        # player y shift
        if playery + playerHeight < BASEY - 1:
            playery += min(playerVelY, BASEY - playery - playerHeight)

        # player velocity change
        if playerVelY < 15:
            playerVelY += playerAccY

        # rotate only when it's a pipe crash
        if not crashInfo['groundCrash']:
            if playerRot > -90:
                playerRot -= playerVelRot

        # draw sprites
        SCREEN.blit(IMAGES['background'], (0,0))

        for uPipe, lPipe in zip(upperPipes, lowerPipes):
            SCREEN.blit(IMAGES['pipe'][0], (uPipe['x'], uPipe['y']))
            SCREEN.blit(IMAGES['pipe'][1], (lPipe['x'], lPipe['y']))

        SCREEN.blit(IMAGES['base'], (basex, BASEY))
        showScore(score)
        
        playerSurface = pygame.transform.rotate(IMAGES['players'][0][1], playerRot)
        SCREEN.blit(playerSurface, (playerx,playery))
        SCREEN.blit(IMAGES['gameover'], (50, 180))

        FPSCLOCK.tick(FPS)
        pygame.display.update()


def playerShm(playerShm):
    """oscillates the value of playerShm['val'] between 8 and -8"""
    if abs(playerShm['val']) == 8:
        playerShm['dir'] *= -1
    if playerShm['dir'] == 1:
         playerShm['val'] += 1
    else:
        playerShm['val'] -= 1


def getRandomPipe():
    """returns a randomly generated pipe"""
    # y of gap between upper and lower pipe
    gapY = random.randrange(0, int(BASEY * 0.6 - PIPEGAPSIZE))
    gapY += int(BASEY * 0.2)
    pipeHeight = IMAGES['pipe'][0].get_height()
    pipeX = SCREENWIDTH + 10

    return [
        {'x': pipeX, 'y': gapY - pipeHeight},  # upper pipe
        {'x': pipeX, 'y': gapY + PIPEGAPSIZE}, # lower pipe
    ]


def showScore(score):
    """displays score in center of screen"""
    scoreDigits = [int(x) for x in list(str(score))]
    totalWidth = 0 # total width of all numbers to be printed

    for digit in scoreDigits:
        totalWidth += IMAGES['numbers'][digit].get_width()

    Xoffset = (SCREENWIDTH - totalWidth) / 2

    for digit in scoreDigits:
        SCREEN.blit(IMAGES['numbers'][digit], (Xoffset, SCREENHEIGHT * 0.1))
        Xoffset += IMAGES['numbers'][digit].get_width()



def showGeneration(generation):
    """displays score in center of screen"""
    scoreDigits = [int(x) for x in list(str(generation))]
    totalWidth = 0 # total width of all numbers to be printed

    for digit in scoreDigits:
        totalWidth += IMAGES['numbers'][digit].get_width()

    Xoffset = (SCREENWIDTH - totalWidth) / 2

    for digit in scoreDigits:
        SCREEN.blit(IMAGES['numbers'][digit], (Xoffset, SCREENHEIGHT * 0.2))
        Xoffset += IMAGES['numbers'][digit].get_width()


def checkCrash(player, upperPipes, lowerPipes):
    """returns True if player collides with base or pipes."""
    pi = player['index']
    id = player['id']
    player['w'] = IMAGES['players'][id][0].get_width()
    player['h'] = IMAGES['players'][id][0].get_height()

    # if player crashes into ground
    if player['y'] + player['h'] >= BASEY - 1:
        return [True, True]
    else:

        playerRect = pygame.Rect(player['x'], player['y'],
                      player['w'], player['h'])
        pipeW = IMAGES['pipe'][0].get_width()
        pipeH = IMAGES['pipe'][0].get_height()

        for uPipe, lPipe in zip(upperPipes, lowerPipes):
            # upper and lower pipe rects
            uPipeRect = pygame.Rect(uPipe['x'], uPipe['y'], pipeW, pipeH)
            lPipeRect = pygame.Rect(lPipe['x'], lPipe['y'], pipeW, pipeH)

            # player and upper/lower pipe hitmasks
            pHitMask = HITMASKS['players'][id][pi]
            uHitmask = HITMASKS['pipe'][0]
            lHitmask = HITMASKS['pipe'][1]

            # if bird collided with upipe or lpipe
            uCollide = pixelCollision(playerRect, uPipeRect, pHitMask, uHitmask)
            lCollide = pixelCollision(playerRect, lPipeRect, pHitMask, lHitmask)

            if uCollide or lCollide:
                return [True, False]

    return [False, False]

def pixelCollision(rect1, rect2, hitmask1, hitmask2):
    """Checks if two objects collide and not just their rects"""
    rect = rect1.clip(rect2)

    if rect.width == 0 or rect.height == 0:
        return False

    x1, y1 = rect.x - rect1.x, rect.y - rect1.y
    x2, y2 = rect.x - rect2.x, rect.y - rect2.y

    for x in xrange(rect.width):
        for y in xrange(rect.height):
            if hitmask1[x1+x][y1+y] and hitmask2[x2+x][y2+y]:
                return True
    return False

def getHitmask(image):
    """returns a hitmask using an image's alpha."""
    mask = []
    for x in xrange(image.get_width()):
        mask.append([])
        for y in xrange(image.get_height()):
            mask[x].append(bool(image.get_at((x,y))[3]))
    return mask

if __name__ == '__main__':
    main()