koperkapel/scenes/level.py

   1 """Render a level"""
   2
   3 from pgzero.constants import keys
   4 from pygame import Surface
   5 import pygame.locals as pgl
   6 from ..loaders.levelloader import levels
   7 from .base import (
   8     Scene, ChangeSceneEvent, MoveViewportEvent, WorldEvent, defer_to_update)
   9 from ..constants import TILE_SIZE, WIDTH, HEIGHT
  10 from ..gamelib.items import clone_old_item
  11 from ..roaches import build_roach
  12 from ..vehicles.base import Vehicle
  13
  14
  15 class BaseLevelScene(Scene):
  16     """ Level scene. """
  17
  18     def __init__(self):
  19         super().__init__()
  20         self._level = None
  21
  22     def enter(self, world):
  23         self._level = levels.load(world.level.name)
  24         self._tiles = self._level.tiles
  25         self._level_layer = 'floor'
  26         self._surfaces = {}
  27         self._overlay = {}
  28         for layer in ['floor', 'tunnels']:
  29             self._surfaces[layer] = self._render(layer)
  30         self._overlay = self._surfaces['floor'].copy()
  31         self._doors = self.actors.add_layer("doors", level=9)
  32         self._keypads = self.actors.add_layer("keypads", level=8)
  33         # These are already Actors
  34         for door in self._level.doors:
  35             self._doors.add(door)
  36         for keypad in self._level.keypads:
  37             self._keypads.add(keypad)
  38
  39     def _render(self, layer):
  40         # We cache the rendered surface to avoid doing a large number
  41         # of blits each frame, as that introduces a large performance
  42         # overhead.
  43         surface = Surface((len(self._tiles[0]) * TILE_SIZE,
  44                            len(self._tiles) * TILE_SIZE))
  45         layer_key = '%s image' % layer
  46         for y, row in enumerate(self._tiles):
  47             for x, tile in enumerate(row):
  48                 pos = (x * TILE_SIZE, y * TILE_SIZE)
  49                 if layer_key not in tile:
  50                     # Skip broken tiles for now
  51                     continue
  52                 surface.blit(tile[layer_key], pos)
  53         return surface.convert_alpha()
  54
  55     def update(self, world, engine, dt):
  56         """Fix the door and keypad positions"""
  57         super().update(world, engine, dt)
  58         for door in self._doors:
  59             door.pos = self.calc_offset(
  60                 door.game_pos[0] * TILE_SIZE, door.game_pos[1] * TILE_SIZE)
  61         for keypad in self._keypads:
  62             keypad.pos = self.calc_offset(
  63                 keypad.game_pos[0] * TILE_SIZE, keypad.game_pos[1] * TILE_SIZE)
  64
  65     def draw(self, screen):
  66         screen.clear()
  67         # Viewport is the position of the screen relative to the
  68         # surface. We need the position of the surface relative to
  69         # the screen for the blit, so this conversion
  70         viewport = self.viewport
  71         screen.surface.blit(self._surfaces[self._level_layer], (0, 0),
  72                             area=(viewport[0], viewport[1], WIDTH, HEIGHT))
  73         if self._level_layer != 'floor':
  74             screen.surface.blit(
  75                 self._overlay, (0, 0),
  76                 area=(viewport[0], viewport[1], WIDTH, HEIGHT),
  77                 special_flags=pgl.BLEND_MULT)
  78         self.actors.draw(screen)
  79
  80     def on_key_down(self, key, mod, unicode):
  81         if key == keys.ESCAPE:
  82             from .menu import MenuScene
  83             return [ChangeSceneEvent(MenuScene())]
  84
  85
  86 class GameLevelScene(BaseLevelScene):
  87
  88     def enter(self, world):
  89         self._held_keys = set()
  90         if self._level is not None:
  91             for generator in self._generators:
  92                 generator.unpause()
  93             return
  94         super().enter(world)
  95         self._roaches = self.actors.add_layer("roaches", level=10)
  96         self._friends = self.actors.add_layer("friendly roaches", level=9)
  97         self._items = self.actors.add_layer("items", level=9)
  98         self._generators = self.actors.add_layer("enemy generators", level=8)
  99         self._enemies = self.actors.add_layer("enemies", level=7)
 100         self._vehicle = Vehicle.current(world)
 101         self._mode = 'walk'
 102         self._angle = 0
 103         self._init_items()
 104         self._init_friendly_roaches()
 105         self._init_generators()
 106         self._key_rate = 0.2
 107         self._last_key_down = 0
 108         return self._init_roaches(world)
 109
 110     def _init_items(self):
 111         for item in self._level.items:
 112             self._items.add(item)
 113
 114     def _init_friendly_roaches(self):
 115         for friend in self._level.friends:
 116             self._friends.add(friend)
 117
 118     def exit(self, world):
 119         for generator in self._generators:
 120             # We don't want these running while we're on other levels, but we
 121             # don't want to delete them here either (because of the vehicle
 122             # management view)
 123             generator.pause()
 124
 125     def _init_generators(self):
 126         for generator in self._level.enemy_generators:
 127             self._generators.add(generator)
 128             generator.unpause()
 129
 130     def _init_roaches(self, world):
 131         x, y = self._level.start_pos
 132         self._level_layer = 'floor'
 133         self._avatar = self._vehicle.get_avatar(world)
 134         self._set_pos(x, y)
 135         self._avatar.pos = (WIDTH // 2, HEIGHT // 2)
 136         self._roaches.add(self._avatar)
 137         # Fix viewport offset
 138         return [
 139             MoveViewportEvent((
 140                 x * TILE_SIZE - WIDTH // 2,
 141                 y * TILE_SIZE - HEIGHT // 2))]
 142
 143     def _set_pos(self, x, y):
 144         self._player_pos = (x, y)
 145         # print('At ', (x, y))
 146
 147     def _can_move(self, x, y):
 148         if self._mode == 'walk':
 149             return self._level.can_walk(x, y, self._level_layer)
 150         elif self._mode == 'fly':
 151             return self._level.can_fly(x, y, self._level_layer)
 152         elif self._mode == 'crawl':
 153             return self._level.can_crawl(x, y, self._level_layer)
 154
 155     def _set_angle(self, angle):
 156         self._angle = angle
 157         self._avatar.angle = angle
 158
 159     @defer_to_update
 160     def _vehicle_changed(self, world):
 161         self._roaches.remove(self._avatar)
 162         self._vehicle = Vehicle.current(world)
 163         self._avatar = self._vehicle.get_avatar(world)
 164         self._avatar.pos = (WIDTH // 2, HEIGHT // 2)
 165         self._roaches.add(self._avatar)
 166         self._set_angle(self._angle)
 167
 168     @defer_to_update
 169     def _add_roach(self, world):
 170         world.roaches.append(build_roach(world))
 171         self._vehicle_changed()
 172
 173     @defer_to_update
 174     def _gain_item(self, world, item):
 175         if item.item_type == "serum":
 176             world.serums.append(item.item_data["serum"])
 177         elif item.item_type == "weapon":
 178             old_weapon = world.weapons.current
 179             world.weapons.current = item.item_data["weapon"]
 180             if old_weapon != "spit":
 181                 clone = clone_old_item(item, weapon=old_weapon)
 182                 self._level.items.append(clone)
 183                 self._items.add(clone)
 184         self._vehicle_changed()
 185
 186     @defer_to_update
 187     def _change_vehicle(self, world):
 188         vehicle = Vehicle.random()
 189         world.vehicles.current = vehicle
 190         self._vehicle_changed()
 191
 192     def update(self, world, engine, dt):
 193         super().update(world, engine, dt)
 194         events = world.pop_events()
 195         for friend in self._friends:
 196             friend.pos = self.calc_offset(
 197                 friend.game_pos[0] * TILE_SIZE, friend.game_pos[1] * TILE_SIZE)
 198         for item in self._items:
 199             item.pos = self.calc_offset(
 200                 item.game_pos[0] * TILE_SIZE, item.game_pos[1] * TILE_SIZE)
 201         more = self._check_held_keys(dt)
 202         if more:
 203             events.extend(more)
 204         return events
 205
 206     def _check_held_keys(self, dt):
 207         for key in self._held_keys:
 208             self._last_key_down += dt
 209             if key in (keys.DOWN, keys.UP, keys.LEFT, keys.RIGHT):
 210                 return self._movement_key(key, dt)
 211             elif key == keys.X:
 212                 return self._fire_key(dt)
 213
 214     def _movement_key(self, key, dt):
 215         x, y = self._player_pos
 216         for k, dp, angle in (
 217             (keys.DOWN, (0, 1), 180),
 218             (keys.UP, (0, -1), 0),
 219             (keys.LEFT, (-1, 0), 90),
 220             (keys.RIGHT, (1, 0), -90),
 221         ):
 222             if key == k:
 223                 if (self._angle == angle and
 224                         self._last_key_down > self._key_rate):
 225                     nx, ny = x + dp[0], y + dp[1]
 226                     if self._can_move(nx, ny):
 227                         self._set_pos(nx, ny)
 228                         offset = (TILE_SIZE * dp[0], TILE_SIZE * dp[1])
 229                         self._set_angle(angle)
 230                         self._last_key_down = 0
 231                         return [MoveViewportEvent(offset)]
 232                 else:
 233                     # just turn
 234                     self._set_angle(angle)
 235
 236     def _activate_key(self):
 237         x, y = self._player_pos
 238         if self._level.is_grate(x, y):
 239             if (self._level_layer == 'floor' and
 240                     self._level.can_crawl(x, y, 'floor')):
 241                 if self._level.can_crawl(x, y, 'tunnels'):
 242                     self._level_layer = 'tunnels'
 243                     self._mode = 'crawl'
 244             elif self._level.can_crawl(x, y, 'floor'):
 245                 # Must be in the tunnels already
 246                 self._level_layer = 'floor'
 247                 self._mode = 'walk'
 248         elif self._level.is_keypad(x, y):
 249             self._level.press_keypad(x, y, self._roaches)
 250         elif self._level.friend_at(x, y):
 251             friend = self._level.friend_at(x, y)
 252             self._level.remove_friend(friend)
 253             self._friends.remove(friend)
 254             self._add_roach()
 255         elif self._level.item_at(x, y):
 256             item = self._level.item_at(x, y)
 257             self._level.remove_item(item)
 258             self._items.remove(item)
 259             self._gain_item(item)
 260         elif self._level.is_exit(x, y):
 261             next_level = self._level.get_exit_level()
 262             return [
 263                 WorldEvent('set', {'level.name': next_level}),
 264                 ChangeSceneEvent(GameLevelScene())]
 265
 266     def _fire_key(self, dt):
 267         if self._last_key_down > self._key_rate:
 268             self._last_key_down = 0
 269             print('Boom')
 270
 271     def _vehicle_management_key(self):
 272         from .roach_management import RoachesScene
 273         return [ChangeSceneEvent(RoachesScene(level_scene=self))]
 274
 275     def on_key_down(self, key, mod, unicode):
 276         x, y = self._player_pos
 277         if key in (keys.DOWN, keys.UP, keys.LEFT, keys.RIGHT):
 278             self._held_keys.clear()
 279             self._held_keys.add(key)
 280             # We do this so pressing the key has an instant effect, and can
 281             # then be held
 282             self._last_key_down = self._key_rate + 0.01
 283             return self._movement_key(key, 0.01)
 284         elif key == keys.C:
 285             return self._activate_key()
 286         elif key == keys.X:
 287             self._held_keys.clear()
 288             self._held_keys.add(key)
 289             self._last_key_down = self._key_rate + 0.01
 290             return self._fire_key(0.01)
 291         elif key == keys.V:
 292             return self._change_vehicle()
 293         elif key == keys.Z:
 294             return self._vehicle_management_key()
 295         return super(GameLevelScene, self).on_key_down(key, mod, unicode)
 296
 297     def on_key_up(self, key, mode):
 298         self._held_keys.discard(key)
 299         self._last_key_down = 0