Mercurial > touhou
annotate pytouhou/utils/interpolator.pyx @ 618:0ea591b0b29e
Fix a build issue introduced in the previous commit. Damn you, cython dependency tracking!
author | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> |
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date | Mon, 30 Mar 2015 21:00:29 +0200 |
parents | e15672733c93 |
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rev | line source |
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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 from libc.stdlib cimport malloc, free |
52
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16 |
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17 |
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18 cdef class Interpolator: |
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19 def __init__(self, tuple values, unsigned long start_frame=0, tuple end_values=None, |
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20 unsigned long end_frame=0, formula=None): |
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21 self._length = len(values) |
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22 self._values = <double*>malloc(self._length * sizeof(double)) |
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23 self.start_values = <double*>malloc(self._length * sizeof(double)) |
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24 self.end_values = <double*>malloc(self._length * sizeof(double)) |
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25 for i in range(self._length): |
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26 self._values[i] = values[i] |
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27 self.start_values[i] = self._values[i] |
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28 if end_values is not None: |
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29 for i in range(self._length): |
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30 self.end_values[i] = end_values[i] |
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31 self.start_frame = start_frame |
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32 self.end_frame = end_frame |
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33 self._frame = 0 |
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34 self._formula = formula |
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35 |
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36 |
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37 def __dealloc__(self): |
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38 free(self.end_values) |
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39 free(self.start_values) |
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40 free(self._values) |
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41 |
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42 |
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43 property values: |
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44 def __get__(self): |
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45 return tuple([self._values[i] for i in range(self._length)]) |
13 | 46 |
47 | |
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48 def __nonzero__(self): |
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49 return self._frame < self.end_frame |
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50 |
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51 |
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52 cpdef set_interpolation_start(self, unsigned long frame, tuple values): |
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53 for i in range(self._length): |
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54 self.start_values[i] = values[i] |
13 | 55 self.start_frame = frame |
56 | |
57 | |
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58 cpdef set_interpolation_end(self, unsigned long frame, tuple values): |
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59 for i in range(self._length): |
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60 self.end_values[i] = values[i] |
13 | 61 self.end_frame = frame |
62 | |
63 | |
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64 cpdef set_interpolation_end_frame(self, unsigned long end_frame): |
13 | 65 self.end_frame = end_frame |
66 | |
67 | |
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68 cpdef set_interpolation_end_values(self, tuple values): |
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69 for i in range(self._length): |
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70 self.end_values[i] = values[i] |
13 | 71 |
72 | |
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73 cpdef update(self, unsigned long frame): |
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74 cdef double coeff |
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75 |
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76 self._frame = frame |
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77 if frame + 1 >= self.end_frame: #XXX: skip the last interpolation step |
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78 # This bug is replicated from the original game |
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79 for i in range(self._length): |
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80 self._values[i] = self.end_values[i] |
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81 self.start_values[i] = self.end_values[i] |
13 | 82 self.start_frame = frame |
83 else: | |
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84 coeff = float(frame - self.start_frame) / float(self.end_frame - self.start_frame) |
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85 if self._formula is not None: |
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86 coeff = self._formula(coeff) |
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87 for i in range(self._length): |
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88 start_value = self.start_values[i] |
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89 end_value = self.end_values[i] |
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90 self._values[i] = start_value + coeff * (end_value - start_value) |