superalien.py

superalien.py

# coding: utf-8
from scene import *
import json
import sound
import random
import math

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": 200, "y": 64, "w": 300, "h": 60, "img": "plf:Ground_SandMid"},
 {"x": 510, "y": 220, "w": 300, "h": 200, "img": "plf:Ground_StoneCenter"},
 {"x": 1300, "y": 220, "w": 300, "h": 100, "img": "plf:Ground_SnowCenter"}
 ]'''
 
diamond_objects_json_str = '''
[{"x": 660, "y": 450, "w": 50, "h": 50, "img": "plc:Gem_Green"},
{"x": 1200, "y": 450, "w": 50, "h": 50, "img": "plc:Gem_Green"}]
'''

coin_objects_json_str = '''
[{"x": 600, "y": 450, "w": 50, "h": 50, "img": "plf:Item_CoinGold"}]
'''

monster_objects_json_str = '''
[{"x": 500, "y": 420, "w": 50, "h": 50, "img": "plf:Enemy_Barnacle", "power": 10, "speed": 0},
{"x": 800, "y": 600, "w": 50, "h": 50, "img": "plf:Enemy_Fly", "power": 15, "speed": 0.6}]
'''

class Diamond (SpriteNode):
  def __init__(self, img, **kwargs):
    SpriteNode.__init__(self, img, **kwargs)

class Coin (SpriteNode):
  def __init__(self, img, **kwargs):
    SpriteNode.__init__(self, img, **kwargs)
    
class Monster (SpriteNode):
  def __init__(self, img, power, speed, **kwargs):
    self.power = power
    self.myspeed = speed
    SpriteNode.__init__(self, img, **kwargs)    

def calculate_overlaps(actor_frame, tile_frame):
# print actor_frame, tile_frame
  if (actor_frame.x+actor_frame.w/2) <= (tile_frame.x+tile_frame.w/2):
    x_overlap = actor_frame.x + actor_frame.w - tile_frame.x
    x_position = 'left'
  else:
    x_overlap = tile_frame.x+tile_frame.w - actor_frame.x
    x_position = 'right'
  if (actor_frame.y+actor_frame.h/2) >=(tile_frame.y+tile_frame.h/2):
    y_overlap = tile_frame.y + tile_frame.h - actor_frame.y
    y_position = 'above'
  else:
    y_overlap = actor_frame.y+actor_frame.h - tile_frame.y
    y_position = 'below'
  return (x_overlap, y_overlap, x_position, y_position)
'''
print calculate_overlaps(Rect(500, 100, 50, 150), Rect(540, 0, 300, 200)) # should print (10, 100)
print calculate_overlaps(Rect(500, 100, 30, 150), Rect(540, 0, 300, 200)) # should print (-10, 100)
print calculate_overlaps(Rect(600, 220, 50, 150), Rect(540, 0, 300, 200)) # (110,-20)
print calculate_overlaps(Rect(850, 190, 50, 150), Rect(540, 0, 300, 200)) # (-10,10)
print calculate_overlaps(Rect(550, 200, 50, 110), Rect(540, 300, 300, 200)) # (60,10)
'''

class GameEnvironment(object):
  def __init__(self):
    self.background_speed = 1
    self.jump = 700
    self.gravity = -600

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 <= 2*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, 0)
      item.position = (x['x'], x['y'])
      item.size = (x['w'], x['h'])
      self.add_child(item)
      self.background_objects.append(item)
      
    self.goodie_objects = []
    json_object = json.loads(diamond_objects_json_str)
    for x in json_object:
      item = Diamond(x['img'])
      item.anchor_point = (0, 0)
      item.position = (x['x'], x['y'])
      item.size = (x['w'], x['h'])
      self.add_child(item)
      self.goodie_objects.append(item)

    json_object = json.loads(coin_objects_json_str)
    for x in json_object:
      item = Coin(x['img'])
      item.anchor_point = (0, 0)
      item.position = (x['x'], x['y'])
      item.size = (x['w'], x['h'])
      self.add_child(item)
      self.goodie_objects.append(item)

    self.monster_objects = []
    json_object = json.loads(monster_objects_json_str)
    for x in json_object:
      item = Monster(x['img'], x['power'], x['speed'])
      item.anchor_point = (0, 0)
      item.position = (x['x'], x['y'])
      item.size = (x['w'], x['h'])
      self.add_child(item)
      self.monster_objects.append(item)
                
    self.player = SpriteNode(standing_texture)
    self.player.anchor_point = (0.5, 0)
    self.player_actual_w = 60
    self.player_actual_h = 78
    self.landed_object = None
    self.add_child(self.player)

    score_font = ('Futura', 40)
    self.score_label = LabelNode('Points: 0', score_font, parent=self)
    self.score_label.position = (self.size.w - 150, self.size.h - 70)
    self.score_label.z_position = 1
    
    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.player_jumped = False
    self.score = 0
    self.score_label.text = 'Points: 0'
    self.screen_number = 1
    self.monster_object_speed = 0.5
    
  def update_player(self):
    g = gravity()
    oldy = self.player.position.y
    oldx = self.player.position.x 
    x = oldx
    y = oldy
    
    if y <= 63:
      self.player_landed = True
      
    if self.player_landed == False:
      self.player.texture = jump_texture
      
    if abs(g.y) <= 0.05 and self.player_landed:
      self.player_x_speed = 0
    
    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
#    else:
#      if abs(g.y) > 0.05:
    x = max(0, min(self.size.w, x + self.player_x_speed))

    if self.player_jumped:
      self.player_jumped = False
      self.player_landed = False
      self.player_y_speed = self.env.jump
    elif not self.player_landed:
      self.player_y_speed = self.player_y_speed + self.env.gravity * self.dt
    
    if not self.player_landed:
      y += self.player_y_speed * self.dt
      if y <= 63:
        y = 63
    
    
    desired_frame = Rect(x - self.player_actual_w/2, y, self.player_actual_w, self.player_actual_h)
    
    if self.landed_object:
       (x_overlap, y_overlap, x_position, y_position) = calculate_overlaps(desired_frame, self.landed_object.frame)
       if x_overlap <= 0:
         self.player_landed = False
         self.landed_object = None
        
    
    for object in self.background_objects:
      (x_overlap, y_overlap, x_position, y_position) = calculate_overlaps(desired_frame, object.frame)
      if x_overlap >= 0 and y_overlap >= 0:
        if x_overlap < y_overlap:
          self.player_x_speed = 0
          if x_position == 'left':
            new_x = desired_frame.x - x_overlap
          else:
            new_x = desired_frame.x + x_overlap
          desired_frame = Rect(new_x, desired_frame.y, desired_frame.w, desired_frame.h)
        else:
          self.player_y_speed = 0
          if y_position == 'above':
            new_y = desired_frame.y + y_overlap
            self.player_landed = True
            self.landed_object = object
          else:
            new_y = desired_frame.y - y_overlap
          desired_frame = Rect(desired_frame.x, new_y, desired_frame.w, desired_frame.h)
      
  
    self.player.position = (desired_frame.x + desired_frame.w/2, desired_frame.y)


  def collect_item(self, item, value=10):
    if value > 10:
      sound.play_effect('digital:PowerUp8')
    else:
      sound.play_effect('digital:PowerUp7')
    item.remove_from_parent()
    if item in self.goodie_objects:
      self.goodie_objects.remove(item)
    else:
      self.monster_objects.remove(item)
    if isinstance(item, Monster):
      self.score -= item.power 
    else:
      self.score += value
    self.score_label.text = 'Points: ' + str(self.score)
 
  def check_item_collisions(self):
    player_hitbox = Rect(self.player.position.x - self.player_actual_w/2, self.player.position.y, self.player_actual_w, self.player_actual_h)
    for item in list(self.goodie_objects + self.monster_objects):
      if item.frame.intersects(player_hitbox):
        if isinstance(item, Coin):
          self.collect_item(item, value = 10)
        elif isinstance(item, Diamond):
          self.collect_item(item, value = 30)
        elif isinstance(item, Monster):
          self.collect_item(item)
  
  def shift_screen(self, direction):
    if direction == 'right':
      self.screen_number += 1
    else:
      self.screen_number -= 1
     
    for node in self.children:
      if not isinstance(node, LabelNode):
        if direction == 'right':
          node.position = (node.position.x - self.size.w, node.position.y)
        else:
          node.position = (node.position.x + self.size.w, node.position.y)
  
  def update_monsters(self):
     for item in self.monster_objects:
       if item.myspeed > 0:
         (a_x, a_y) = self.player.position 
         (x, y) = item.position
         l = math.sqrt((x-a_x)**2 + (y-a_y)**2)
         dx = -(x-a_x)/l * item.myspeed
         dy = -(y-a_y)/l * item.myspeed
         item.position = item.position + (dx, dy)
#       actions = [A.move_by(dx, dy)]        
#       item.run_action(A.sequence(actions))
       
  def update(self):
    self.check_item_collisions()
    self.update_player()
    self.update_monsters()
    if self.player.position.x == self.size.w and self.screen_number < 2:
#      self.screen_number += 1
      self.shift_screen('right')
#      for node in self.children:
#        if not isinstance(node, LabelNode):
#          node.position = (node.position.x - self.size.w, node.position.y)
    elif self.player.position.x == 0 and self.screen_number > 1:
#      self.screen_number -= 1
      self.shift_screen('left')
#      for node in self.children:
#        if not isinstance(node, LabelNode):
#          node.position = (node.position.x + self.size.w, node.position.y)

#    print self.children  
        
    '''
   for dirtblock in self.background_objects:
      pos = dirtblock.position
      pos.x -= self.env.background_speed
      dirtblock.position = pos'''
  def touch_began(self, touch):
    if self.player_landed:
      self.player_jumped = True
      self.player_landed = False
      sound.play_effect('game:Boing_1') 
    

run(MyScene(), LANDSCAPE)