Mercurial > touhou
annotate pytouhou/utils/interpolator.pyx @ 433:1222341ea22c
Always run the first frame of an ANMRunner.
author | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> |
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date | Sun, 11 Aug 2013 14:23:50 +0200 (2013-08-11) |
parents | fab7ad2f0d8b |
children | d778db08190f |
rev | line source |
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Add some documentation, GPLv3 headers, README and COPYING file.
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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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14 |
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15 |
13 | 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): |
13 | 19 self.values = tuple(values) |
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) |
13 | 26 |
27 | |
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28 def __nonzero__(self): |
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29 return self._frame < self.end_frame |
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30 |
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31 |
13 | 32 def set_interpolation_start(self, frame, values): |
33 self.start_values = tuple(values) | |
34 self.start_frame = frame | |
35 | |
36 | |
37 def set_interpolation_end(self, frame, values): | |
38 self.end_values = tuple(values) | |
39 self.end_frame = frame | |
40 | |
41 | |
42 def set_interpolation_end_frame(self, end_frame): | |
43 self.end_frame = end_frame | |
44 | |
45 | |
46 def set_interpolation_end_values(self, values): | |
47 self.end_values = tuple(values) | |
48 | |
49 | |
50 def update(self, frame): | |
50
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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 |
13 | 56 self.start_frame = frame |
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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61 |