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annotate pytouhou/game/particle.pyx @ 706:bca515da9047

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examples: use common module.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Fri, 23 Aug 2019 19:46:47 +0200
parents cd8a2baf468c
children
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631
cd8a2baf468c Move Particle to its own module, to not pollute pytouhou.game.effect.
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1 # -*- encoding: utf-8 -*-
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2 ##
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3 ## Copyright (C) 2015 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,
cd8a2baf468c Move Particle to its own module, to not pollute pytouhou.game.effect.
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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.
cd8a2baf468c Move Particle to its own module, to not pollute pytouhou.game.effect.
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13 ##
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14
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15 from pytouhou.game.game cimport Game
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16
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17
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18 cdef class Particle(Effect):
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19 def __init__(self, pos, index, anm, long amp, Game game, bint reverse=False, long duration=24):
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20 Effect.__init__(self, pos, index, anm)
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21
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22 self.frame = 0
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23 self.duration = duration
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24
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25 random_pos = (self.x + amp * game.prng.rand_double() - amp / 2,
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26 self.y + amp * game.prng.rand_double() - amp / 2)
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27
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28 if not reverse:
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29 self.pos_interpolator = Interpolator((self.x, self.y), 0,
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30 random_pos, duration, formula=(lambda x: 2. * x - x ** 2))
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31 else:
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32 self.pos_interpolator = Interpolator(random_pos, 0,
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33 (self.x, self.y), duration, formula=(lambda x: 2. * x - x ** 2))
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34 self.x, self.y = random_pos
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35
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36
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37 cpdef update(self):
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38 Effect.update(self)
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39
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40 self.pos_interpolator.update(self.frame)
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41 self.x, self.y = self.pos_interpolator.values
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42
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43 self.frame += 1