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annotate pytouhou/game/effect.py @ 399:1c773544eaeb

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Make the background use a single vbo and offsets, just like the 2D code.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Tue, 12 Feb 2013 19:19:31 +0100
parents ac2891afb0bb
children c9433188ffdb
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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
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20
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21
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22 class Effect(object):
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23 def __init__(self, pos, index, anm_wrapper):
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24 self.sprite = Sprite()
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25 self.anmrunner = ANMRunner(anm_wrapper, index, self.sprite)
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26 self.anmrunner.run_frame()
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27 self.removed = False
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28 self.objects = [self]
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30 self.x, self.y = pos
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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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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 self.removed = True
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44 class Particle(Effect):
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45 def __init__(self, pos, index, anm_wrapper, amp, game, reverse=False, duration=24):
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46 Effect.__init__(self, pos, index, anm_wrapper)
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48 self.frame = 0
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49 self.duration = duration
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51 random_pos = (self.x + amp * game.prng.rand_double() - amp / 2,
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52 self.y + amp * game.prng.rand_double() - amp / 2)
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53
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54 if not reverse:
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55 self.pos_interpolator = Interpolator((self.x, self.y), 0,
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56 random_pos, duration, formula=(lambda x: 2. * x - x ** 2))
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57 else:
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58 self.pos_interpolator = Interpolator(random_pos, 0,
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59 (self.x, self.y), duration, formula=(lambda x: 2. * x - x ** 2))
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60 self.x, self.y = random_pos
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63 def update(self):
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64 Effect.update(self)
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66 self.pos_interpolator.update(self.frame)
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67 self.x, self.y = self.pos_interpolator.values
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69 self.frame += 1
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