game

import random, pygame, sys
from pygame.locals import *

fps = 30
window_width = 704
window_height = 704
fpsClock = pygame.time.Clock()
map_width = 30
map_height = 15

green = (100, 255, 0)

display_surf = pygame.display.set_mode((window_height, window_width), 0, 32)
pygame.display.set_caption("Rl")


class Object:
    # this is a generic object: the player, a monster, an item, the stairs...
    # it's always represented by a character on screen.
    def __init__(self, x, y, image):
        self.x = x
        self.y = y
        self.image = pygame.image.load(image)

    def move(self, dx, dy):
        if find_title(world[self.y+dy][self.x+dx]).solid is False:  #this line checks if move is possible
            self.x += dx
            self.y += dy

    def draw(self):
        display_surf.blit(self.image, (self.x, self.y))


class Title:
    # this is a class for titles like grass, road and so on
    def __init__(self, title_number, solid, image):
        self.title_number = title_number
        self.solid = solid
        self.image = pygame.image.load(image)


def find_title(n):
    if n == 0:
        return nothing
    if n == 1:
        return grass
    if n == 2:
        return fance


def world_gen():
    camera_x = scrolling_map(hero.x, 5, 10, map_width)
    camera_y = scrolling_map(hero.y, 5, 10, map_height)
    for x in range(camera_x, camera_x+11):
        for y in range(camera_y, camera_y+11):
            if world[y][x] != 0:
                display_surf.blit(find_title(world[y][x]).image, (64 * x, 64 * y))
                display_surf.blit(hero.image, (64 * 5, 64 * 5))

def scrolling_map(p, hs, s, m):
    """
        Get the position of the camera in a scrolling map:

         - p is the position of the player.
         - hs is half of the screen size, and s is the full screen size.
         - m is the size of the map.
        """

    if p < hs:
        return 0
    elif p >= m - hs:
        return m - s
    else:
        return p - hs


hero = Object(5, 5, "hero.png")
grass = Title(1, False, "grass.png")
fance = Title(2, True, "fance.png")
nothing = Title(0, False, "road.png")

world = [[2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
         [2, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
         [2, 2, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
         [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
         [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
         [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
         [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
         [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
         [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
         [2, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
         [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
         [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
         [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
         [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]]

while True:
    display_surf.fill(green)

    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()

        if event.type == KEYDOWN:
            if event.key == pygame.K_LEFT:
                if hero.x - 1 >= 0:
                    hero.move(-1, 0)
            if event.key == pygame.K_RIGHT:
                if hero.x + 1 < map_width:
                    hero.move(1, 0)
            if event.key == pygame.K_UP:
                if hero.y - 1 >= 0:
                    hero.move(0, -1)
            if event.key == pygame.K_DOWN:
                if hero.y + 1 < map_height:
                    hero.move(0, 1)

    world_gen()

    pygame.display.update()
    pygame.time.delay(50)
    fpsClock.tick(fps)