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annotate pytouhou/utils/interpolator.pyx @ 182:20843875ad8f

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(Hopefully) use difficulty as it should. The difficulty[0] (also called rank) varies from 0 to 32 and affects various parts of the game. The difficulty now impact those parts, but how it is modified during the gameplay is not clear. Such changes to the difficulty are not handled yet. [0] http://en.touhouwiki.net/wiki/Embodiment_of_Scarlet_Devil/Gameplay#Rank
author Thibaut Girka <thib@sitedethib.com>
date Tue, 25 Oct 2011 01:29:40 +0200
parents fab7ad2f0d8b
children d778db08190f
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1 # -*- encoding: utf-8 -*-
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2 ##
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3 ## Copyright (C) 2011 Thibaut Girka <thib@sitedethib.com>
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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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16 class Interpolator(object):
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17 __slots__ = ('values', 'start_values', 'end_values', 'start_frame', 'end_frame', '_frame', '_formula')
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18 def __init__(self, values=(), start_frame=0, end_values=(), end_frame=0, formula=None):
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19 self.values = tuple(values)
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20 self.start_values = tuple(values)
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21 self.end_values = tuple(end_values)
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22 self.start_frame = start_frame
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23 self.end_frame = end_frame
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24 self._frame = 0
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25 self._formula = formula or (lambda x: x)
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28 def __nonzero__(self):
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29 return self._frame < self.end_frame
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32 def set_interpolation_start(self, frame, values):
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33 self.start_values = tuple(values)
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34 self.start_frame = frame
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37 def set_interpolation_end(self, frame, values):
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38 self.end_values = tuple(values)
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39 self.end_frame = frame
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42 def set_interpolation_end_frame(self, end_frame):
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43 self.end_frame = end_frame
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46 def set_interpolation_end_values(self, values):
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47 self.end_values = tuple(values)
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50 def update(self, frame):
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51 self._frame = frame
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52 if frame >= self.end_frame - 1: #XXX: skip the last interpolation step
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53 # This bug is replicated from the original game
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54 self.values = self.end_values
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55 self.start_values = self.end_values
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56 self.start_frame = frame
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57 else:
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58 coeff = self._formula(float(frame - self.start_frame) / float(self.end_frame - self.start_frame))
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59 self.values = [start_value + coeff * (end_value - start_value)
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60 for (start_value, end_value) in zip(self.start_values, self.end_values)]
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