koperkapel/scenes/level.py

   1 """Render a level"""
   2
   3 import random
   4 from pgzero.constants import keys
   5 from pygame import Surface
   6 import pygame.locals as pgl
   7 from ..loaders.levelloader import levels
   8 from .base import (
   9     Scene, ChangeSceneEvent, MoveViewportEvent, WorldEvent, defer_to_update)
  10 from ..constants import TILE_SIZE, WIDTH, HEIGHT
  11 from ..gamelib.items import clone_old_item, create_new_item
  12 from ..roaches import build_roach
  13 from ..vehicles.base import Vehicle
  14 from ..weapons import weapon_by_name
  15
  16
  17 class PlayerStats:
  18     def __init__(self, world):
  19         roaches = world.roaches
  20         self.health = sum(r.health for r in roaches)
  21         self.smart = self._count_attr("smart", roaches)
  22         self.fast = self._count_attr("fast", roaches)
  23         self.strong = self._count_attr("strong", roaches)
  24
  25     def __str__(self):
  26         return "<PlayerStats health=%d smart=%d fast=%d strong=%d>" % (
  27             self.health, self.smart, self.fast, self.strong)
  28
  29     def _count_attr(self, attr, roaches):
  30         attrs = [r[attr] for r in roaches]
  31         attrs = [a for a in attrs if a]
  32         return len(attrs)
  33
  34
  35 class BaseLevelScene(Scene):
  36     """ Level scene. """
  37
  38     def __init__(self):
  39         super().__init__()
  40         self._level = None
  41         self._stats = None
  42
  43     def enter(self, world):
  44         self._level = levels.load(world.level.name)
  45         self._tiles = self._level.tiles
  46         self._level_layer = 'floor'
  47         self._surfaces = {}
  48         self._overlay = {}
  49         for layer in ['floor', 'tunnels']:
  50             self._surfaces[layer] = self._render(layer)
  51         self._overlay = self._surfaces['floor'].copy()
  52         self._doors = self.actors.add_layer("doors", level=9)
  53         self._keypads = self.actors.add_layer("keypads", level=8)
  54         self._bullets = self.actors.add_layer("bullets", level=10)
  55         # These are already Actors
  56         for door in self._level.doors:
  57             self._doors.add(door)
  58         for keypad in self._level.keypads:
  59             self._keypads.add(keypad)
  60
  61     def _render(self, layer):
  62         # We cache the rendered surface to avoid doing a large number
  63         # of blits each frame, as that introduces a large performance
  64         # overhead.
  65         surface = Surface((len(self._tiles[0]) * TILE_SIZE,
  66                            len(self._tiles) * TILE_SIZE))
  67         layer_key = '%s image' % layer
  68         for y, row in enumerate(self._tiles):
  69             for x, tile in enumerate(row):
  70                 pos = (x * TILE_SIZE, y * TILE_SIZE)
  71                 if layer_key not in tile:
  72                     # Skip broken tiles for now
  73                     continue
  74                 surface.blit(tile[layer_key], pos)
  75         return surface.convert_alpha()
  76
  77     def update(self, world, engine, dt):
  78         """Fix the door and keypad positions"""
  79         super().update(world, engine, dt)
  80         for door in self._doors:
  81             door.pos = self.calc_offset(
  82                 door.game_pos[0] * TILE_SIZE, door.game_pos[1] * TILE_SIZE)
  83         for keypad in self._keypads:
  84             keypad.pos = self.calc_offset(
  85                 keypad.game_pos[0] * TILE_SIZE, keypad.game_pos[1] * TILE_SIZE)
  86
  87     def draw(self, screen):
  88         screen.clear()
  89         # Viewport is the position of the screen relative to the
  90         # surface. We need the position of the surface relative to
  91         # the screen for the blit, so this conversion
  92         viewport = self.viewport
  93         screen.surface.blit(self._surfaces[self._level_layer], (0, 0),
  94                             area=(viewport[0], viewport[1], WIDTH, HEIGHT))
  95         if self._level_layer != 'floor':
  96             screen.surface.blit(
  97                 self._overlay, (0, 0),
  98                 area=(viewport[0], viewport[1], WIDTH, HEIGHT),
  99                 special_flags=pgl.BLEND_MULT)
 100         self.actors.draw(screen)
 101
 102     def on_key_down(self, key, mod, unicode):
 103         if key == keys.ESCAPE:
 104             from .menu import MenuScene
 105             return [ChangeSceneEvent(MenuScene())]
 106
 107
 108 class GameLevelScene(BaseLevelScene):
 109
 110     def enter(self, world):
 111         self._held_keys = set()
 112         if self._level is not None:
 113             for generator in self._generators:
 114                 generator.unpause()
 115             return
 116         self._update_player_stats(world)
 117         super().enter(world)
 118         self._roaches = self.actors.add_layer("roaches", level=10)
 119         self._friends = self.actors.add_layer("friendly roaches", level=9)
 120         self._items = self.actors.add_layer("items", level=9)
 121         self._generators = self.actors.add_layer("enemy generators", level=8)
 122         self._enemies = self.actors.add_layer("enemies", level=11)
 123         self._vehicle = Vehicle.current(world)
 124         self._mode = 'walk'
 125         self._angle = 0  # up
 126         self._angle_dp = (0, -1)  # up
 127         self._init_items()
 128         self._init_friendly_roaches()
 129         self._init_generators()
 130         self._key_rate = 0.2
 131         self._last_key_down = 0
 132         self._last_dmg = 0
 133         return self._init_roaches(world)
 134
 135     def _init_items(self):
 136         for item in self._level.items:
 137             self._items.add(item)
 138
 139     def _init_friendly_roaches(self):
 140         for friend in self._level.friends:
 141             self._friends.add(friend)
 142
 143     def exit(self, world):
 144         for generator in self._generators:
 145             # We don't want these running while we're on other levels, but we
 146             # don't want to delete them here either (because of the vehicle
 147             # management view)
 148             generator.pause()
 149
 150     def _init_generators(self):
 151         for generator in self._level.enemy_generators:
 152             self._generators.add(generator)
 153             generator.unpause()
 154
 155     def _init_roaches(self, world):
 156         x, y = self._level.start_pos
 157         self._level_layer = 'floor'
 158         self._avatar = self._vehicle.get_avatar(world)
 159         self._set_pos(x, y)
 160         self._avatar.pos = (WIDTH // 2, HEIGHT // 2)
 161         self._roaches.add(self._avatar)
 162         # Fix viewport offset
 163         return [
 164             MoveViewportEvent((
 165                 x * TILE_SIZE - WIDTH // 2,
 166                 y * TILE_SIZE - HEIGHT // 2))]
 167
 168     def _set_pos(self, x, y):
 169         self._player_pos = (x, y)
 170         # print('At ', (x, y))
 171
 172     def _can_move(self, x, y):
 173         if self._mode == 'walk':
 174             if not self._level.enemy_at(x, y):
 175                 return self._level.can_walk(x, y, self._level_layer)
 176             return False
 177         elif self._mode == 'fly':
 178             return self._level.can_fly(x, y, self._level_layer)
 179         elif self._mode == 'crawl':
 180             return self._level.can_crawl(x, y, self._level_layer)
 181
 182     def _set_angle(self, angle, dp):
 183         self._angle = angle
 184         self._angle_dp = dp
 185         self._avatar.angle = angle
 186
 187     @defer_to_update
 188     def _vehicle_changed(self, world):
 189         self._roaches.remove(self._avatar)
 190         self._vehicle = Vehicle.current(world)
 191         self._avatar = self._vehicle.get_avatar(world)
 192         self._avatar.pos = (WIDTH // 2, HEIGHT // 2)
 193         self._roaches.add(self._avatar)
 194         self._set_angle(self._angle, self._angle_dp)
 195
 196     @defer_to_update
 197     def _add_roach(self, world):
 198         world.roaches.append(build_roach(world))
 199         self._vehicle_changed()
 200
 201     @defer_to_update
 202     def _damage_player(self, world):
 203         if not world.roaches:
 204             # Skip out if we're already dead
 205             return
 206         roach = random.choice(world.roaches)
 207         roach.health -= self._last_dmg
 208         self._last_dmg = 0
 209         if roach.health < 0:
 210             index = [x.name for x in world.roaches].index(roach.name)
 211             world.roaches.pop(index)
 212             # We can't check for empty, because updates will be processed later
 213             if len(world.roaches) > 1:
 214                 self._vehicle_changed()
 215
 216     @defer_to_update
 217     def _gain_item(self, world, item):
 218         if item.item_type == "serum":
 219             world.serums.append(item.item_data["serum"])
 220         elif item.item_type == "weapon":
 221             old_weapon = world.weapons.current
 222             world.weapons.current = item.item_data["weapon"]
 223             if old_weapon != "spit":
 224                 clone = clone_old_item(item, weapon=old_weapon)
 225                 self._level.items.append(clone)
 226                 self._items.add(clone)
 227         self._vehicle_changed()
 228
 229     def _hit_enemy(self, enemy, weapon):
 230         enemy.health -= weapon.damage
 231         if enemy.health <= 0:
 232             self._level.remove_enemy(enemy)
 233             self._enemies.remove(enemy)
 234
 235     def _fire_bullet(self, bullet, pos, dp, angle):
 236         if len(self._bullets) >= 10:
 237             return
 238         bullet.game_pos = pos
 239         bullet.game_dp = dp
 240         bullet.dt = 0
 241         bullet.level_layer = self._level_layer
 242         bullet.angle = angle
 243         self._bullets.add(bullet)
 244
 245     def _check_for_bullet_hits(self):
 246         for bullet in list(self._bullets):
 247             for enemy in list(self._enemies):
 248                 if enemy.collidepoint(bullet.pos):
 249                     self._hit_enemy(enemy, bullet.weapon)
 250                     self._bullets.remove(bullet)
 251
 252     def _update_bullet(self, bullet, dt):
 253         bullet.dt += dt
 254         if bullet.dt > 0.1:
 255             bullet.dt = 0
 256             bullet.game_pos = pos = (
 257                 bullet.game_pos[0] + bullet.game_dp[0],
 258                 bullet.game_pos[1] + bullet.game_dp[1])
 259             if not self._level.can_bullet(pos[0], pos[1], bullet.level_layer):
 260                 self._bullets.remove(bullet)
 261
 262     @defer_to_update
 263     def _fire_weapon(self, world):
 264         weapon = weapon_by_name(world.weapons.current)
 265         weapon.play_sound()
 266         if weapon.bullet_range > 0:
 267             self._fire_bullet(
 268                 weapon.assemble_bullet(), self._player_pos, self._angle_dp,
 269                 self._angle)
 270         else:
 271             # melee
 272             pos, dp = self._player_pos, self._angle_dp
 273             pos = (pos[0] + dp[0], pos[1] + dp[1])
 274             enemy = self._level.get_enemy(pos[0], pos[1])
 275             if enemy:
 276                 self._hit_enemy(enemy, weapon)
 277
 278     @defer_to_update
 279     def _change_vehicle(self, world):
 280         x, y = self._player_pos
 281
 282         old_vehicle = world.vehicles.current
 283
 284         item = self._level.item_at(x, y)
 285
 286         if item and item.item_type == "vehicle":
 287             world.vehicles.current = item.item_data["vehicle"]
 288             self._level.remove_item(item)
 289             self._items.remove(item)
 290         else:
 291             world.vehicles.current = "walking"
 292
 293         if old_vehicle != "walking":
 294             dropped_vehicle = create_new_item(
 295                 "vehicle", (x, y), vehicle=old_vehicle)
 296             self._level.items.append(dropped_vehicle)
 297             self._items.add(dropped_vehicle)
 298
 299         self._vehicle_changed()
 300
 301     def update(self, world, engine, dt):
 302         if not world.roaches:
 303             # Catch death here
 304             from .menu import MenuScene
 305             return [ChangeSceneEvent(MenuScene())]
 306         super().update(world, engine, dt)
 307         events = world.pop_events()
 308         for friend in self._friends:
 309             friend.pos = self.calc_offset(
 310                 friend.game_pos[0] * TILE_SIZE, friend.game_pos[1] * TILE_SIZE)
 311         for item in self._items:
 312             item.pos = self.calc_offset(
 313                 item.game_pos[0] * TILE_SIZE, item.game_pos[1] * TILE_SIZE)
 314         self._check_enemies(dt)
 315         for enemy in self._enemies:
 316             enemy.pos = self.calc_offset(
 317                 enemy.game_pos[0] * TILE_SIZE, enemy.game_pos[1] * TILE_SIZE)
 318         for bullet in list(self._bullets):
 319             self._update_bullet(bullet, dt)
 320             bullet.pos = self.calc_offset(
 321                 bullet.game_pos[0] * TILE_SIZE + (TILE_SIZE // 2),
 322                 bullet.game_pos[1] * TILE_SIZE + (TILE_SIZE // 2))
 323         self._check_for_bullet_hits()
 324         self._update_player_stats(world)
 325         more = self._check_held_keys(dt)
 326         if more:
 327             events.extend(more)
 328         return events
 329
 330     def _update_player_stats(self, world):
 331         self._stats = PlayerStats(world)
 332
 333     def _check_enemies(self, dt):
 334         if len(self._level.enemies) != len(self._enemies):
 335             # New nemy has spawned
 336             for enemy in self._level.enemies:
 337                 if enemy not in self._enemies:
 338                     self._enemies.add(enemy)
 339         for enemy in self._enemies:
 340             dmg = enemy.attack(self._player_pos, self._level_layer, dt)
 341             if dmg is not None:
 342                 self._last_dmg += dmg
 343         if self._last_dmg:
 344             self._damage_player()
 345
 346     def _check_held_keys(self, dt):
 347         for key in self._held_keys:
 348             self._last_key_down += dt
 349             if key in (keys.DOWN, keys.UP, keys.LEFT, keys.RIGHT):
 350                 return self._movement_key(key, dt)
 351             elif key == keys.X:
 352                 return self._fire_key(dt)
 353
 354     def _movement_key(self, key, dt):
 355         x, y = self._player_pos
 356         for k, dp, angle in (
 357             (keys.DOWN, (0, 1), 180),
 358             (keys.UP, (0, -1), 0),
 359             (keys.LEFT, (-1, 0), 90),
 360             (keys.RIGHT, (1, 0), -90),
 361         ):
 362             if key == k:
 363                 if (self._angle == angle and
 364                         self._last_key_down > self._key_rate):
 365                     nx, ny = x + dp[0], y + dp[1]
 366                     if self._can_move(nx, ny):
 367                         self._set_pos(nx, ny)
 368                         offset = (TILE_SIZE * dp[0], TILE_SIZE * dp[1])
 369                         self._set_angle(angle, dp)
 370                         self._last_key_down = 0
 371                         return [MoveViewportEvent(offset)]
 372                 else:
 373                     # just turn
 374                     self._set_angle(angle, dp)
 375
 376     def _activate_key(self):
 377         x, y = self._player_pos
 378         if self._level.is_grate(x, y):
 379             if (self._level_layer == 'floor' and
 380                     self._level.can_crawl(x, y, 'floor')):
 381                 if self._level.can_crawl(x, y, 'tunnels'):
 382                     self._level_layer = 'tunnels'
 383                     self._mode = 'crawl'
 384             elif self._level.can_crawl(x, y, 'floor'):
 385                 # Must be in the tunnels already
 386                 self._level_layer = 'floor'
 387                 self._mode = 'walk'
 388         elif self._level.is_keypad(x, y):
 389             self._level.press_keypad(x, y, self._roaches)
 390         elif self._level.friend_at(x, y):
 391             friend = self._level.friend_at(x, y)
 392             self._level.remove_friend(friend)
 393             self._friends.remove(friend)
 394             self._add_roach()
 395         elif self._level.item_at(x, y):
 396             item = self._level.item_at(x, y)
 397             if item.item_type != "vehicle":
 398                 self._level.remove_item(item)
 399                 self._items.remove(item)
 400                 self._gain_item(item)
 401         elif self._level.is_exit(x, y):
 402             next_level = self._level.get_exit_level()
 403             return [
 404                 WorldEvent('set', {'level.name': next_level}),
 405                 ChangeSceneEvent(GameLevelScene())]
 406
 407     def _fire_key(self, dt):
 408         if self._last_key_down > self._key_rate:
 409             self._last_key_down = 0
 410             self._fire_weapon()
 411
 412     def _vehicle_management_key(self):
 413         from .roach_management import RoachesScene
 414         return [ChangeSceneEvent(RoachesScene(level_scene=self))]
 415
 416     def on_key_down(self, key, mod, unicode):
 417         x, y = self._player_pos
 418         if key in (keys.DOWN, keys.UP, keys.LEFT, keys.RIGHT):
 419             firing = (keys.X in self._held_keys)
 420             self._held_keys.clear()
 421             self._held_keys.add(key)
 422             if firing:
 423                 self._held_keys.add(keys.X)
 424             # We do this so pressing the key has an instant effect, and can
 425             # then be held
 426             self._last_key_down = self._key_rate + 0.01
 427             return self._movement_key(key, 0.01)
 428         elif key == keys.C:
 429             return self._activate_key()
 430         elif key == keys.X:
 431             self._held_keys.clear()
 432             self._held_keys.add(key)
 433             self._last_key_down = self._key_rate + 0.01
 434             return self._fire_key(0.01)
 435         elif key == keys.V:
 436             return self._change_vehicle()
 437         elif key == keys.Z:
 438             return self._vehicle_management_key()
 439         return super(GameLevelScene, self).on_key_down(key, mod, unicode)
 440
 441     def on_key_up(self, key, mode):
 442         self._held_keys.discard(key)
 443         self._last_key_down = 0