Super_Alien.py

Super_Alien.py

from scene import *
import json
import sound

A = Action

standing_texture = Texture('plf:AlienBlue_front')
walk_textures = [Texture('plf:AlienBlue_walk1'), Texture('plf:AlienBlue_walk2')]
jump_texture = Texture('plf:AlienBlue_jump')

background_objects_json_str = '''
[{"x": 700, "y": 64, "w": 65, "h": 50, "img": "plf:Ground_SandMid"}, 
{"x": 635, "y": 64, "w": 65, "h": 50, "img": "plf:Ground_SandMid"},
{"x": 570, "y": 64, "w": 65, "h": 50, "img": "plf:Ground_SandMid"},
{"x": 505, "y": 64, "w": 65, "h": 50, "img": "plf:Ground_SandMid"},
{"x": 825, "y": 125, "w": 65, "h": 50, "img": "plf:Ground_SandHalf_mid"},
{"x": 675, "y": 185, "w": 65, "h": 50, "img": "plf:Ground_SandHalf_mid"}]'''

class GameEnvironment(object):
  def __init__(self):
    self.background_speed = 1


class MyScene (Scene):
  def setup(self):
    self.env = GameEnvironment()
    self.ground = Node(parent=self)
    groundimage = 'plf:Ground_SandCenter'
    w = SpriteNode(groundimage).size.w
    h = SpriteNode(groundimage).size.h
    x = 0
    while x <= self.size.w + w:
      tile = SpriteNode(groundimage, position=(x, h/2))
      self.ground.add_child(tile)
      x += w
    self.background_color = 'midnightblue'
    self.background_objects = []
    json_object = json.loads(background_objects_json_str)
    for x in json_object:
      item = SpriteNode(x['img'])
      item.anchor_point = (0.5, 0)
      item.position = (x['x'], x['y'])
      item.size = (x['w'], x['h'])
      self.add_child(item)
      self.background_objects.append(item)
    self.player = SpriteNode(standing_texture)
    self.player.anchor_point = (0.5, 0)
    self.add_child(self.player)
    self.new_game()
    
  def new_game(self):
    self.walk_step = -1
    self.player.position = (80, 63)
    self.player.texture = standing_texture
    self.player_y_speed = 0.0
    self.player_x_speed = 0.0
    self.max_speed = 40.0
    self.player_landed = True
    self.g = 2
    
  def update_player(self):
    g = gravity()
    y = self.player.position.y + self.player_y_speed
    x = self.player.position.x 
    
    if y > 63:
      self.player_landed = False
      
    if self.player_landed == False:
      self.player.texture = jump_texture
    
    if abs(g.y) > 0.05 and self.player_landed:
      self.player_x_speed = g.y * self.max_speed
      self.player.x_scale = cmp(g.y, 0)
      step = int(self.player.position.x / 40) % 2
      
      if step != self.walk_step:
        self.player.texture = walk_textures[step]
        sound.play_effect('rpg:Footstep00', 0.05, 1.0 + 0.5 * step)
        self.walk_step = step
    elif self.player_landed:
      self.player.texture = standing_texture
      self.walk_step = -1
      
    if not self.player_landed:
      x = x + self.player_x_speed
      y = y - self.g
    else:
      if abs(g.y) > 0.05:
        x = max(0, min(self.size.w, x + self.player_x_speed))
        
    self.player.position = (x, y)


  def update(self):
    self.update_player()
    '''
   for dirtblock in self.background_objects:
      pos = dirtblock.position
      pos.x -= self.env.background_speed
      dirtblock.position = pos'''
  def touch_began(self, touch):
    self.player_y_speed += 2.5
    

run(MyScene(), LANDSCAPE)