annotate pytouhou/game/effect.py @ 190:dbe6b7b2d3fc

Fix a few things about particles.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Thu, 27 Oct 2011 15:09:42 -0700
parents 184196480f59
children 9f58e2a6e950
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1 # -*- encoding: utf-8 -*-
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2 ##
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3 ## Copyright (C) 2011 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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4 ##
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5 ## This program is free software; you can redistribute it and/or modify
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6 ## it under the terms of the GNU General Public License as published
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7 ## by the Free Software Foundation; version 3 only.
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8 ##
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9 ## This program is distributed in the hope that it will be useful,
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10 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 ## GNU General Public License for more details.
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13 ##
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14
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15
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16 from pytouhou.game.sprite import Sprite
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17 from pytouhou.vm.anmrunner import ANMRunner
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18 from pytouhou.utils.interpolator import Interpolator
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19 from math import pi
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21
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22
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23 class Effect(object):
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24 def __init__(self, pos, index, anm_wrapper):
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25 self._sprite = Sprite()
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26 self._anmrunner = ANMRunner(anm_wrapper, index, self._sprite)
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27 self._anmrunner.run_frame()
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28 self._removed = False
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29
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30 self.x, self.y = pos
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32
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33 def update(self):
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34 if self._anmrunner and not self._anmrunner.run_frame():
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35 self._anmrunner = None
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36
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37 if self._sprite:
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38 if self._sprite._removed:
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39 self._sprite = None
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40
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41
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42 class Particle(object):
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43 def __init__(self, start_pos, index, anm_wrapper, size, amp, delay, game):
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44 self._sprite = Sprite()
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45 self._sprite.anm, self._sprite.texcoords = anm_wrapper.get_sprite(index)
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46 self._game = game
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47 self._removed = False
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48
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49 self.x, self.y = start_pos
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50 self.frame = 0
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51 self._sprite.alpha = 128
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52 self._sprite.blendfunc = 1
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53 self._sprite.rescale = (size, size)
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54
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55 self.pos_interpolator = None
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56 self.scale_interpolator = None
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57 self.rotations_interpolator = None
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58
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59 self.delay = delay
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60 self.amp = amp
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62
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63 def set_end_pos(self, amp):
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64 end_pos = (self.x + amp * self._game.prng.rand_double() - amp/2,
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65 self.y + amp * self._game.prng.rand_double() - amp/2)
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66
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67 self.pos_interpolator = Interpolator((self.x, self.y), 0,
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68 end_pos, 24, formula=(lambda x: 2. * x - x ** 2))
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69 self.scale_interpolator = Interpolator(self._sprite.rescale, 0,
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70 (0., 0.), 24)
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71 self.rotations_interpolator = Interpolator(self._sprite.rotations_3d, 0,
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72 (0., 0., 2*pi), 24)
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75 def update(self):
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76 if (self.frame == 0 and not self.delay) or (self.frame == 1 and self.delay):
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77 self.set_end_pos(self.amp)
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78
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79 if self.pos_interpolator:
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80 self.pos_interpolator.update(self.frame)
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81 self.x, self.y = self.pos_interpolator.values
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83 self.scale_interpolator.update(self.frame)
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84 self._sprite.rescale = self.scale_interpolator.values
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85
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86 self.rotations_interpolator.update(self.frame)
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87 self._sprite.rotations_3d = self.rotations_interpolator.values
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88
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89 self._sprite._changed = True
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91 if self.frame == 24:
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92 self._removed = True
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93
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94 self.frame += 1