koperkapel/roaches.py

   1 """ Tools for creating roach actors. """
   2
   3 import random
   4 from pgzero.clock import each_tick
   5 from pgzero.loaders import images
   6 from pygame.constants import BLEND_RGBA_MULT
   7 from .actors.orientatedsurf import OrientatedSurfActor
   8 from .serums import roach_serum_color
   9
  10
  11 def roach_by_name(world, roach_name):
  12     roaches = [r for r in world.roaches if r.name == roach_name]
  13     if not roaches:
  14         return None
  15     return roaches[0]
  16
  17
  18 class RoachActor(OrientatedSurfActor):
  19     def __init__(self, frames):
  20         self._frames = frames
  21         self._frame = random.randint(0, len(frames) - 1)
  22         self._dt = 0
  23         self._cycle_dt = 0.2
  24         each_tick(self.update)
  25         super().__init__(surf=frames[self._frame], angle=0)
  26
  27     def update(self, dt):
  28         self._dt += dt
  29         while self._dt > self._cycle_dt:
  30             self._dt -= self._cycle_dt
  31             self._frame += 1
  32             self._frame %= len(self._frames)
  33         self.surf = self._frames[self._frame]
  34
  35
  36 class RoachFactory:
  37
  38     def __init__(self, suffix, frames=4):
  39         self.suffix = suffix
  40         self.frames = 4
  41
  42     def assemble_frame(self, i, color, roach_data):
  43         roach = images.load("roach%s/roach_%d" % (self.suffix, i + 1))
  44         eyes = images.load("roach%s/eyes_%d" % (self.suffix, i + 1))
  45         frame = roach.copy()
  46         frame.fill(color, None, BLEND_RGBA_MULT)
  47         frame.blit(eyes, (0, 0))
  48         return frame
  49
  50     def assemble(self, roach_data):
  51         color = roach_serum_color(roach_data)
  52         frames = [
  53             self.assemble_frame(i, color, roach_data)
  54             for i in range(self.frames)]
  55         return RoachActor(frames)
  56
  57
  58 default_roaches = RoachFactory("")
  59 t32_roaches = RoachFactory("_32")
  60 t21_roaches = RoachFactory("_21")
  61 big_roaches = RoachFactory("_big")