game.py

from sys import exit
from numpy.random import randint, choice
import numpy as np

from evolution import Evolution
from player import Player
from variables import global_variables
import pygame


def display_score():
    score = int((pygame.time.get_ticks() - start_time) / 100)
    score_surf = game_font.render(f"Score: {score}", False, (64, 64, 64))
    score_rect = score_surf.get_rect(center=(520, 50))
    screen.blit(score_surf, score_rect)
    return score


def display_best_score():
    score_surf = game_font.render(f"BScore: {best_score}", False, (64, 64, 64))
    score_rect = score_surf.get_rect(center=(520, 100))
    screen.blit(score_surf, score_rect)


def display_generation():
    score_surf = small_game_font.render(f"Generation: {generation}", False, (64, 64, 64))
    score_rect = score_surf.get_rect(topleft=(8, 50))
    screen.blit(score_surf, score_rect)


class Obstacle(pygame.sprite.Sprite):
    def __init__(self, obstacle_type, position=None):
        super().__init__()

        if obstacle_type == "snail":
            snail_1 = pygame.image.load('Graphics/Snail/snail1.png').convert_alpha()
            snail_2 = pygame.image.load('Graphics/Snail/snail2.png').convert_alpha()

            # rotating -90 degree and scaling by factor of 0.5
            snail_1 = pygame.transform.rotozoom(snail_1, -90, 0.5)
            snail_2 = pygame.transform.rotozoom(snail_2, -90, 0.5)

            if position == "left":
                # flipping vertically
                snail_1 = pygame.transform.flip(snail_1, flip_x=False, flip_y=True)
                snail_2 = pygame.transform.flip(snail_2, flip_x=False, flip_y=True)
            else:
                # flipping vertically and horizontally
                snail_1 = pygame.transform.flip(snail_1, flip_x=True, flip_y=True)
                snail_2 = pygame.transform.flip(snail_2, flip_x=True, flip_y=True)

            self.frames = [snail_1, snail_2]

            self.animation_index = 0
            self.image = self.frames[self.animation_index]
            if position == "left":
                self.rect = self.image.get_rect(midleft=(177, randint(-100, -50)))
            else:
                self.rect = self.image.get_rect(midright=(430, randint(-100, -50)))
        else:
            fly_1 = pygame.image.load('Graphics/Fly/Fly1.png').convert_alpha()
            fly_2 = pygame.image.load('Graphics/Fly/Fly2.png').convert_alpha()

            fly_1 = pygame.transform.rotozoom(fly_1, 0, 0.5)
            fly_2 = pygame.transform.rotozoom(fly_2, 0, 0.5)

            self.frames = [fly_1, fly_2]

            self.animation_index = 0
            self.image = self.frames[self.animation_index]
            self.rect = self.image.get_rect(center=(randint(250, 350), randint(-100, -50)))

    def animation_state(self):
        self.animation_index += 0.1
        if self.animation_index >= len(self.frames):
            self.animation_index = 0
        self.image = self.frames[int(self.animation_index)]

    def update(self):
        self.animation_state()
        self.rect.y += 6
        self.destroy_if_necessary()

    def destroy_if_necessary(self):
        if self.rect.top > 800:
            self.kill()


def collision_sprite():
    for obstacle in obstacle_group:
        pygame.sprite.spritecollide(obstacle, players, dokill=True)

    return len(players) == 0


def draw_intro_text(text, height, width=global_variables['screen_width'] // 2, color=(111, 196, 169)):
    message = game_font.render(text, False, color)
    message_rect = message.get_rect(center=(width, height))
    screen.blit(message, message_rect)


def draw_btn(btn, btn_rect):
    pygame.draw.rect(screen, '#E8F3F1', btn_rect)
    pygame.draw.rect(screen, '#E8F3F1', btn_rect, 10)
    screen.blit(btn, btn_rect)


def create_players(mode, player_list=None):
    global players

    players = pygame.sprite.Group()
    if mode == "Manual":
        players.add(Player(mode))
    else:
        for player in player_list:
            player.change_gravity('left')
            player.rect.x = 177
            players.add(player)


def update_fitness():
    for player in players:
        player.fitness = current_score


def reset_timer_and_seed():
    np.random.seed(35)
    pygame.time.set_timer(snail_timer, 0)
    pygame.time.set_timer(fly_timer, 0)
    pygame.time.set_timer(snail_timer, 500)
    pygame.time.set_timer(fly_timer, 4750)


if __name__ == '__main__':
    pygame.init()
    screen = pygame.display.set_mode((global_variables['screen_width'], global_variables['screen_height']))
    pygame.display.set_caption(global_variables['title'])
    clock = pygame.time.Clock()
    game_font = pygame.font.Font('Font/PixelType.ttf', 40)
    small_game_font = pygame.font.Font('Font/PixelType.ttf', 30)
    title_font = pygame.font.Font('Font/PixelType.ttf', 80)

    game_active = False
    evolution = Evolution()
    generation = 1
    game_mode = None
    start_time = 0
    best_score = 0
    num_players = 150

    background_surface = pygame.image.load('Graphics/Background.jpg').convert()

    # Players
    players = None
    prev_players = []
    current_players = []

    # Obstacles
    obstacle_group = pygame.sprite.Group()
    global_variables['obstacle_groups'] = obstacle_group

    # Intro screen
    player_stand = pygame.image.load('Graphics/Player/player_stand.png').convert_alpha()
    player_stand = pygame.transform.rotozoom(player_stand, 0, 3)
    player_stand_rect = player_stand.get_rect(center=(global_variables['screen_width'] // 2, 250))

    game_name = title_font.render('Snail Jumper', False, (111, 196, 169))
    game_name_rectangle = game_name.get_rect(center=(global_variables['screen_width'] // 2, 80))

    start_game_btn = game_font.render("Start Game", False, (111, 196, 169))
    start_game_btn_rect = start_game_btn.get_rect(center=(global_variables['screen_width'] // 2, 440))

    start_evolutionary_btn = game_font.render("Start With Neuroevolution", False, (111, 196, 169))
    start_evolutionary_btn_rect = start_evolutionary_btn.get_rect(center=(global_variables['screen_width'] // 2, 490))

    exit_btn = game_font.render("Exit", False, (111, 196, 169))
    exit_btn_rect = exit_btn.get_rect(center=(global_variables['screen_width'] // 2, 540))

    # Timer
    snail_timer = pygame.USEREVENT + 1
    # pygame.time.set_timer(snail_timer, 500)


    fly_timer = pygame.USEREVENT + 2
    # pygame.time.set_timer(fly_timer, 4750)

    while True:
        global_variables['events'] = pygame.event.get()
        for event in global_variables['events']:
            if event.type == pygame.QUIT:
                pygame.quit()
                exit()
            if game_active:
                if event.type == snail_timer:
                    obstacle_group.add(Obstacle('snail', choice(['left', 'right'])))
                if event.type == fly_timer:
                    obstacle_group.add(Obstacle('fly'))
            else:
                if event.type == pygame.MOUSEBUTTONDOWN:
                    clicked_start_btn = start_game_btn_rect.collidepoint(pygame.mouse.get_pos())
                    clicked_start_evolutionary_btn = start_evolutionary_btn_rect.collidepoint(pygame.mouse.get_pos())
                    clicked_exit_btn = exit_btn_rect.collidepoint(pygame.mouse.get_pos())

                    if clicked_start_btn or clicked_start_evolutionary_btn:
                        game_active = True
                        reset_timer_and_seed()
                        start_time = pygame.time.get_ticks()
                        if clicked_start_btn:
                            game_mode = "Manual"
                            create_players(mode=game_mode)
                        else:
                            game_mode = "Neuroevolution"
                            current_players = evolution.generate_new_population(num_players)
                            prev_players = []
                            create_players(mode=game_mode, player_list=current_players)
                    if clicked_exit_btn:
                        pygame.quit()
                        exit()

        if game_active:
            screen.blit(background_surface, (0, 0))

            # Player
            players.draw(screen)
            players.update()

            # Obstacle Group
            obstacle_group.draw(screen)
            obstacle_group.update()

            # collision
            no_players_left = collision_sprite()
            if no_players_left:
                obstacle_group.empty()
                if game_mode == "Manual":
                    game_active = False
                else:
                    prev_players = evolution.next_population_selection(prev_players + current_players, num_players)
                    current_players = evolution.generate_new_population(num_players, prev_players)
                    reset_timer_and_seed()
                    create_players(game_mode, player_list=prev_players + current_players)

                    generation += 1
                    start_time = pygame.time.get_ticks()

            current_score = display_score()
            if game_mode == "Neuroevolution":
                display_generation()
                update_fitness()

            if current_score > best_score:
                best_score = current_score
            display_best_score()
        else:
            screen.fill("#2F4858")
            screen.blit(player_stand, player_stand_rect)
            screen.blit(game_name, game_name_rectangle)

            draw_btn(start_game_btn, start_game_btn_rect)
            draw_btn(start_evolutionary_btn, start_evolutionary_btn_rect)
            draw_btn(exit_btn, exit_btn_rect)

            if best_score > 0:
                draw_intro_text(f"Best score: {best_score}", height=400)

            draw_intro_text("Computational Intelligence Assignment", height=600, color='#D5ED8B')
            draw_intro_text("Amirkabir University of Technology", height=650, color='#AB8CD5')
        pygame.display.update()
        clock.tick(60)