{"id":6549,"date":"2020-07-20T08:21:28","date_gmt":"2020-07-20T06:21:28","guid":{"rendered":"https:\/\/pythonprogramming.altervista.org\/?p=6549"},"modified":"2020-07-20T08:21:28","modified_gmt":"2020-07-20T06:21:28","slug":"random-platform-worlds","status":"publish","type":"post","link":"https:\/\/pythonprogramming.altervista.org\/random-platform-worlds\/","title":{"rendered":"Random platform worlds"},"content":{"rendered":"

Explaining the code<\/h2>\n

I found this code by dafluffypotato and tried to make some type of game out of it. At the moment I got this. I made a “random generated map” with this code, instead of having to make the map by myself.<\/p>\n

def load_map():\r\n\r\n    d = [\r\n        \"110011\",\r\n        \"010111\",\r\n        \"011011\",\r\n        \"010111\",\r\n        \"110111\",\r\n        \"000111\",\r\n        \"111011\",\r\n        \"010000\",\r\n        \"110101\",\r\n        \"011001\",\r\n        \"000000\",\r\n        \"000000\",\r\n        \"000000\",\r\n        \"000000\",\r\n        \"110100\"]\r\n\r\n    data = [choice(d) * 2 for x in range(20)]\r\n    game_map = []\r\n    for row in data:\r\n        game_map.append(list(row))\r\n    return game_map<\/pre>\n
\"\"<\/a><\/p>\n
To generate a new map you have to (if you press space you generate a new one)<\/p>\n
game_map = load_map()<\/pre>\n
so that the map is showed in the while loop with this<\/p>\n
   tile_rects = tilerects()[0]<\/pre>\n
that blits the tiles with this function<\/p>\n
def tilerects():\r\n    tile_rects = []\r\n    y = 0\r\n    for layer in game_map:\r\n        x = 0\r\n        for tile in layer:\r\n            if tile == '1':\r\n                display.blit(dirt_img,(x*16-scroll[0],y*16-scroll[1]))\r\n            if tile == '2':\r\n                display.blit(grass_img,(x*16-scroll[0],y*16-scroll[1]))\r\n            if tile != '0':\r\n                tile_rects.append(pygame.Rect(x*16,y*16,16,16))\r\n            x += 1\r\n        y += 1<\/pre>\n
For every line in game map, if the tile is 1 shows a brick, otherwise it creates a Rect object in place of the 0s.<\/p>\n
This is called for every frame in the while loop. I made a function for conveniense, so that the code i more clean and readable.<\/p>\n
The collision is checked with this code<\/p>\n
    player_rect, collisions = move(player_rect, player_movement, tile_rects)<\/pre>\n
If the collision is at the bottom (if the player has a dirt_img “under” his feet, it stops falling down<\/p>\n
    if collisions['bottom'] == True:\r\n        air_timer = 0\r\n        vertical_momentum = 0\r\n    else:\r\n        air_timer += 1<\/pre>\n
The whole code<\/h2>\n
We will eventually get a game out of this starting point. For the moment, here is the whole code. The github repo is here<\/a>.<\/p>\n
import pygame, sys, os\r\nfrom random import choice\r\n\r\n\r\nclock = pygame.time.Clock()\r\n\r\nfrom pygame.locals import *\r\npygame.init() # initiates pygame\r\n\r\npygame.display.set_caption('Pygame Platformer')\r\n\r\nWINDOW_SIZE = (600,800)\r\n\r\nscreen = pygame.display.set_mode(WINDOW_SIZE,0,32) # initiate the window\r\n\r\ndisplay = pygame.Surface((300,400)) # used as the surface for rendering, which is scaled\r\n\r\nmoving_right = False\r\nmoving_left = False\r\nvertical_momentum = 0\r\nair_timer = 0\r\ntrue_scroll = [0,0]\r\n\r\n\r\ndef load_map():\r\n\r\n    d = [\r\n        \"110011\",\r\n        \"010111\",\r\n        \"011011\",\r\n        \"010111\",\r\n        \"110111\",\r\n        \"000111\",\r\n        \"111011\",\r\n        \"010000\",\r\n        \"110101\",\r\n        \"011001\",\r\n        \"000000\",\r\n        \"000000\",\r\n        \"000000\",\r\n        \"000000\",\r\n        \"110100\"]\r\n\r\n    data = [choice(d) * 2 for x in range(20)]\r\n    game_map = []\r\n    for row in data:\r\n        game_map.append(list(row))\r\n    return game_map\r\n\r\n\r\nglobal animation_frames\r\nanimation_frames = {}\r\n\r\n\r\ndef load_animation(path,frame_durations):\r\n    global animation_frames\r\n    animation_name = path.split('\/')[-1]\r\n    animation_frame_data = []\r\n    n = 0\r\n    for frame in frame_durations:\r\n        animation_frame_id = animation_name + '_' + str(n)\r\n        img_loc = path + '\/' + animation_frame_id + '.png'\r\n        # player_animations\/idle\/idle_0.png\r\n        animation_image = pygame.image.load(img_loc).convert()\r\n        animation_image.set_colorkey((255,255,255))\r\n        animation_frames[animation_frame_id] = animation_image.copy()\r\n        for i in range(frame):\r\n            animation_frame_data.append(animation_frame_id)\r\n        n += 1\r\n    return animation_frame_data\r\n\r\ndef change_action(action_var,frame,new_value):\r\n    if action_var != new_value:\r\n        action_var = new_value\r\n        frame = 0\r\n    return action_var,frame\r\n        \r\n\r\nanimation_database = {}\r\n\r\nanimation_database['run'] = load_animation('player_animations\/run',[7,7])\r\nanimation_database['idle'] = load_animation('player_animations\/idle',[7,7,40])\r\n\r\ngame_map = load_map()\r\n\r\ngrass_img = pygame.image.load('grass.png')\r\ndirt_img = pygame.image.load('dirt.png')\r\n\r\nplayer_action = 'idle'\r\nplayer_frame = 0\r\nplayer_flip = False\r\n\r\nplayer_rect = pygame.Rect(100,100,5,13)\r\n\r\nbackground_objects = [[0.25,[120,10,70,400]],[0.25,[280,30,40,400]],[0.5,[30,40,40,400]],[0.5,[130,90,100,400]],[0.5,[300,80,120,400]]]\r\n\r\ndef collision_test(rect,tiles):\r\n    hit_list = []\r\n    for tile in tiles:\r\n        if rect.colliderect(tile):\r\n            hit_list.append(tile)\r\n    return hit_list\r\n\r\ndef move(rect,movement,tiles):\r\n    collision_types = {'top':False,'bottom':False,'right':False,'left':False}\r\n    rect.x += movement[0]\r\n    hit_list = collision_test(rect,tiles)\r\n    for tile in hit_list:\r\n        if movement[0] > 0:\r\n            rect.right = tile.left\r\n            collision_types['right'] = True\r\n        elif movement[0] < 0:\r\n            rect.left = tile.right\r\n            collision_types['left'] = True\r\n    rect.y += movement[1]\r\n    hit_list = collision_test(rect,tiles)\r\n    for tile in hit_list:\r\n        if movement[1] > 0:\r\n            rect.bottom = tile.top\r\n            collision_types['bottom'] = True\r\n        elif movement[1] < 0:\r\n            rect.top = tile.bottom\r\n            collision_types['top'] = True\r\n    return rect, collision_types\r\n\r\ndef tilerects():\r\n    tile_rects = []\r\n    y = 0\r\n    for layer in game_map:\r\n        x = 0\r\n        for tile in layer:\r\n            if tile == '1':\r\n                display.blit(dirt_img,(x*16-scroll[0],y*16-scroll[1]))\r\n            if tile == '2':\r\n                display.blit(grass_img,(x*16-scroll[0],y*16-scroll[1]))\r\n            if tile != '0':\r\n                tile_rects.append(pygame.Rect(x*16,y*16,16,16))\r\n            x += 1\r\n        y += 1\r\n\r\n    return tile_rects, x, y\r\nwhile True: # game loop\r\n    display.fill((146,244,255)) # clear screen by filling it with blue\r\n\r\n    true_scroll[0] += (player_rect.x-true_scroll[0]-152)\/20\r\n    true_scroll[1] += (player_rect.y-true_scroll[1]-106)\/20\r\n    scroll = true_scroll.copy()\r\n    scroll[0] = int(scroll[0])\r\n    scroll[1] = int(scroll[1])\r\n\r\n    # pygame.draw.rect(display,(7,80,75),pygame.Rect(0,120,300,80))\r\n    # for background_object in background_objects:\r\n    #     obj_rect = pygame.Rect(background_object[1][0]-scroll[0]*background_object[0],background_object[1][1]-scroll[1]*background_object[0],background_object[1][2],background_object[1][3])\r\n    #     if background_object[0] == 0.5:\r\n    #         pygame.draw.rect(display,(14,222,150),obj_rect)\r\n    #     else:\r\n    #         pygame.draw.rect(display,(9,91,85),obj_rect)\r\n\r\n    tile_rects = tilerects()[0]\r\n\r\n    player_movement = [0,0]\r\n    if moving_right == True:\r\n        player_movement[0] += 2\r\n    if moving_left == True:\r\n        player_movement[0] -= 2\r\n    player_movement[1] += vertical_momentum\r\n    vertical_momentum += 0.2\r\n    if vertical_momentum > 3:\r\n        vertical_momentum = 3\r\n\r\n    if player_movement[0] == 0:\r\n        player_action,player_frame = change_action(player_action,player_frame,'idle')\r\n    if player_movement[0] > 0:\r\n        player_flip = False\r\n        player_action,player_frame = change_action(player_action,player_frame,'run')\r\n    if player_movement[0] < 0:\r\n        player_flip = True\r\n        player_action,player_frame = change_action(player_action,player_frame,'run')\r\n\r\n    player_rect, collisions = move(player_rect, player_movement, tile_rects)\r\n\r\n    if collisions['bottom'] == True:\r\n        air_timer = 0\r\n        vertical_momentum = 0\r\n    else:\r\n        air_timer += 1\r\n\r\n    player_frame += 1\r\n    if player_frame >= len(animation_database[player_action]):\r\n        player_frame = 0\r\n    player_img_id = animation_database[player_action][player_frame]\r\n    player_img = animation_frames[player_img_id]\r\n    display.blit(pygame.transform.flip(player_img,player_flip,False),(player_rect.x-scroll[0],player_rect.y-scroll[1]))\r\n\r\n\r\n    for event in pygame.event.get(): # event loop\r\n        if event.type == QUIT:\r\n            pygame.quit()\r\n            sys.exit()\r\n        if event.type == KEYDOWN:\r\n            if event.key == K_SPACE:\r\n                game_map = load_map()\r\n            if event.key == K_RIGHT:\r\n                moving_right = True\r\n            if event.key == K_LEFT:\r\n                moving_left = True\r\n            if event.key == K_UP:\r\n                if air_timer < 6:\r\n                    vertical_momentum = -5\r\n        if event.type == KEYUP:\r\n            if event.key == K_RIGHT:\r\n                moving_right = False\r\n            if event.key == K_LEFT:\r\n                moving_left = False\r\n        \r\n    screen.blit(pygame.transform.scale(display,WINDOW_SIZE),(0,0))\r\n    pygame.display.update()\r\n    clock.tick(60)\r\n<\/pre>\n
\"\"<\/a><\/p>\n
The video of the output<\/h2>\n
https:\/\/pythonprogramming.altervista.org\/wp-content\/uploads\/2020\/07\/00-1.mp4<\/a><\/video><\/div>\n\r\n