Complete Roguelike Tutorial, using python+libtcod, part 2 code

This is part of the code for a series of tutorials; the main page can be found here.

Generalizing

import libtcodpy as libtcod

#actual size of the window
SCREEN_WIDTH = 80
SCREEN_HEIGHT = 50

LIMIT_FPS = 20  #20 frames-per-second maximum


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, char, color):
        self.x = x
        self.y = y
        self.char = char
        self.color = color
    
    def move(self, dx, dy):
        #move by the given amount
        self.x += dx
        self.y += dy
    
    def draw(self):
        #set the color and then draw the character that represents this object at its position
        libtcod.console_set_foreground_color(con, self.color)
        libtcod.console_put_char(con, self.x, self.y, self.char, libtcod.BKGND_NONE)
    
    def clear(self):
        #erase the character that represents this object
        libtcod.console_put_char(con, self.x, self.y, ' ', libtcod.BKGND_NONE)


def handle_keys():
    #key = libtcod.console_check_for_keypress()  #real-time
    key = libtcod.console_wait_for_keypress(True)  #turn-based
    
    if key.vk == libtcod.KEY_ENTER and key.lalt:
        #Alt+Enter: toggle fullscreen
        libtcod.console_set_fullscreen(not libtcod.console_is_fullscreen())
        
    elif key.vk == libtcod.KEY_ESCAPE:
        return True  #exit game
    
    #movement keys
    if libtcod.console_is_key_pressed(libtcod.KEY_UP):
        player.move(0, -1)
        
    elif libtcod.console_is_key_pressed(libtcod.KEY_DOWN):
        player.move(0, 1)
        
    elif libtcod.console_is_key_pressed(libtcod.KEY_LEFT):
        player.move(-1, 0)
        
    elif libtcod.console_is_key_pressed(libtcod.KEY_RIGHT):
        player.move(1, 0)


#############################################
# Initialization & Main Loop
#############################################

libtcod.console_set_custom_font('arial10x10.png', libtcod.FONT_TYPE_GREYSCALE | libtcod.FONT_LAYOUT_TCOD)
libtcod.console_init_root(SCREEN_WIDTH, SCREEN_HEIGHT, 'python/libtcod tutorial', False)
libtcod.sys_set_fps(LIMIT_FPS)
con = libtcod.console_new(SCREEN_WIDTH, SCREEN_HEIGHT)

#create object representing the player
player = Object(SCREEN_WIDTH/2, SCREEN_HEIGHT/2, '@', libtcod.white)

#create an NPC
npc = Object(SCREEN_WIDTH/2 - 5, SCREEN_HEIGHT/2, '@', libtcod.yellow)

#the list of objects with those two
objects = [npc, player]


while not libtcod.console_is_window_closed():
    
    #draw all objects in the list
    for object in objects:
        object.draw()
    
    #blit the contents of "con" to the root console and present it
    libtcod.console_blit(con, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT, 0, 0, 0)
    libtcod.console_flush()

    #erase all objects at their old locations, before they move
    for object in objects:
        object.clear()
    
    #handle keys and exit game if needed
    exit = handle_keys()
    if exit:
        break

The Map

import libtcodpy as libtcod

#actual size of the window
SCREEN_WIDTH = 80
SCREEN_HEIGHT = 50

#size of the map
MAP_WIDTH = 80
MAP_HEIGHT = 45

LIMIT_FPS = 20  #20 frames-per-second maximum


color_dark_wall = libtcod.Color(0, 0, 100)
color_dark_ground = libtcod.Color(50, 50, 150)


class Tile:
    #a tile of the map and its properties
    def __init__(self, blocked, block_sight = None):
        self.blocked = blocked
        
        #by default, if a tile is blocked, it also blocks sight
        if block_sight is None: block_sight = blocked
        self.block_sight = block_sight

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, char, color):
        self.x = x
        self.y = y
        self.char = char
        self.color = color
    
    def move(self, dx, dy):
        #move by the given amount, if the destination is not blocked
        if not map[self.x + dx][self.y + dy].blocked:
            self.x += dx
            self.y += dy
    
    def draw(self):
        #set the color and then draw the character that represents this object at its position
        libtcod.console_set_foreground_color(con, self.color)
        libtcod.console_put_char(con, self.x, self.y, self.char, libtcod.BKGND_NONE)
    
    def clear(self):
        #erase the character that represents this object
        libtcod.console_put_char(con, self.x, self.y, ' ', libtcod.BKGND_NONE)



def make_map():
    global map
    
    #fill map with "unblocked" tiles
    map = [[ Tile(False)
        for y in range(MAP_HEIGHT) ]
            for x in range(MAP_WIDTH) ]
    
    #place two pillars to test the map
    map[30][22].blocked = True
    map[30][22].block_sight = True
    map[50][22].blocked = True
    map[50][22].block_sight = True


def render_all():
    global color_light_wall
    global color_light_ground
    
    #go through all tiles, and set their background color
    for y in range(MAP_HEIGHT):
        for x in range(MAP_WIDTH):
            wall = map[x][y].block_sight
            if wall:
                libtcod.console_set_back(con, x, y, color_dark_wall, libtcod.BKGND_SET )
            else:
                libtcod.console_set_back(con, x, y, color_dark_ground, libtcod.BKGND_SET )

    #draw all objects in the list
    for object in objects:
        object.draw()
    
    #blit the contents of "con" to the root console
    libtcod.console_blit(con, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT, 0, 0, 0)
    
def handle_keys():
    #key = libtcod.console_check_for_keypress()  #real-time
    key = libtcod.console_wait_for_keypress(True)  #turn-based
    
    if key.vk == libtcod.KEY_ENTER and key.lalt:
        #Alt+Enter: toggle fullscreen
        libtcod.console_set_fullscreen(not libtcod.console_is_fullscreen())
        
    elif key.vk == libtcod.KEY_ESCAPE:
        return True  #exit game
    
    #movement keys
    if libtcod.console_is_key_pressed(libtcod.KEY_UP):
        player.move(0, -1)
        
    elif libtcod.console_is_key_pressed(libtcod.KEY_DOWN):
        player.move(0, 1)
        
    elif libtcod.console_is_key_pressed(libtcod.KEY_LEFT):
        player.move(-1, 0)
        
    elif libtcod.console_is_key_pressed(libtcod.KEY_RIGHT):
        player.move(1, 0)


#############################################
# Initialization & Main Loop
#############################################

libtcod.console_set_custom_font('arial10x10.png', libtcod.FONT_TYPE_GREYSCALE | libtcod.FONT_LAYOUT_TCOD)
libtcod.console_init_root(SCREEN_WIDTH, SCREEN_HEIGHT, 'python/libtcod tutorial', False)
libtcod.sys_set_fps(LIMIT_FPS)
con = libtcod.console_new(SCREEN_WIDTH, SCREEN_HEIGHT)

#create object representing the player
player = Object(SCREEN_WIDTH/2, SCREEN_HEIGHT/2, '@', libtcod.white)

#create an NPC
npc = Object(SCREEN_WIDTH/2 - 5, SCREEN_HEIGHT/2, '@', libtcod.yellow)

#the list of objects with those two
objects = [npc, player]

#generate map (at this point it's not drawn to the screen)
make_map()


while not libtcod.console_is_window_closed():
    
    #render the screen
    render_all()
    
    libtcod.console_flush()

    #erase all objects at their old locations, before they move
    for object in objects:
        object.clear()
    
    #handle keys and exit game if needed
    exit = handle_keys()
    if exit:
        break