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annotate pytouhou/utils/matrix.pyx @ 435:878273a984c4

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Improve Matrix representation, using float[16] instead of imbricated python lists.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Wed, 07 Aug 2013 11:34:40 +0200
parents f4d76d3d6f2a
children 26c082870dcf
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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ab826bc29aa2 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 from libc.math cimport sin, cos
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16 from libc.stdlib cimport malloc, free
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17
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18
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19 cdef class Matrix:
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20 def __init__(self, data=None):
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21 if data is None:
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22 data = [1, 0, 0, 0,
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23 0, 1, 0, 0,
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24 0, 0, 1, 0,
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25 0, 0, 0, 1]
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26 for i in xrange(4):
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27 for j in xrange(4):
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28 self.data[i*4+j] = data[4*i+j]
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30
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31 def __mul__(Matrix self, Matrix other):
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32 cdef float *d1, *d2, *d3
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33
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34 out = Matrix()
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35 d1 = self.data
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36 d2 = other.data
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37 d3 = out.data
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38 for i in xrange(4):
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39 for j in xrange(4):
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40 d3[4*i+j] = 0
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41 for k in xrange(4):
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42 d3[4*i+j] += d1[4*i+k] * d2[4*k+j]
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43 return out
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44
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45
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46 cdef void flip(self) nogil:
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47 cdef float *data
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48
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49 data = self.data
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50 for i in xrange(4):
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51 data[i] = -data[i]
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54 cdef void scale(self, float x, float y, float z) nogil:
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55 cdef float *data, coordinate[3]
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56
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57 data = self.data
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58 coordinate[0] = x
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59 coordinate[1] = y
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60 coordinate[2] = z
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61
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62 for i in xrange(3):
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63 for j in xrange(4):
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64 data[4*i+j] *= coordinate[i]
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67 cdef void scale2d(self, float x, float y) nogil:
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68 cdef float *data
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69
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70 data = self.data
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71 for i in xrange(4):
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72 data[ i] *= x
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73 data[4+i] *= y
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76 cdef void translate(self, float x, float y, float z) nogil:
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77 cdef float *data, coordinate[3], item[3]
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78
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79 data = self.data
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80 coordinate[0] = x
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81 coordinate[1] = y
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82 coordinate[2] = z
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83 for i in xrange(3):
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84 item[i] = data[12+i] * coordinate[i]
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85
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86 for i in xrange(3):
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87 for j in xrange(4):
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88 data[4*i+j] += item[i]
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91 cdef void rotate_x(self, float angle) nogil:
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92 cdef float cos_a, sin_a
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93 cdef float lines[8], *data
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94
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95 data = self.data
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96 cos_a = cos(angle)
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97 sin_a = sin(angle)
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98 for i in xrange(8):
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99 lines[i] = data[i+4]
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100 for i in xrange(4):
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101 data[4+i] = cos_a * lines[i] - sin_a * lines[4+i]
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102 data[8+i] = sin_a * lines[i] + cos_a * lines[4+i]
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104
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105 cdef void rotate_y(self, float angle) nogil:
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106 cdef float cos_a, sin_a
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107 cdef float lines[8], *data
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108
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109 data = self.data
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110 cos_a = cos(angle)
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111 sin_a = sin(angle)
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112 for i in xrange(4):
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113 lines[i] = data[i]
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114 lines[i+4] = data[i+8]
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115 for i in xrange(4):
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116 data[ i] = cos_a * lines[i] + sin_a * lines[4+i]
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117 data[8+i] = -sin_a * lines[i] + cos_a * lines[4+i]
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119
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120 cdef void rotate_z(self, float angle) nogil:
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121 cdef float cos_a, sin_a
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122 cdef float lines[8], *data
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124 data = self.data
28
f405b947624d Massive sprite updating/matrix handling optimizations
Thibaut Girka <thib@sitedethib.com>
parents: 4
diff changeset
125 cos_a = cos(angle)
f405b947624d Massive sprite updating/matrix handling optimizations
Thibaut Girka <thib@sitedethib.com>
parents: 4
diff changeset
126 sin_a = sin(angle)
435
878273a984c4 Improve Matrix representation, using float[16] instead of imbricated python lists.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 424
diff changeset
127 for i in xrange(8):
878273a984c4 Improve Matrix representation, using float[16] instead of imbricated python lists.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 424
diff changeset
128 lines[i] = data[i]
878273a984c4 Improve Matrix representation, using float[16] instead of imbricated python lists.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 424
diff changeset
129 for i in xrange(4):
878273a984c4 Improve Matrix representation, using float[16] instead of imbricated python lists.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 424
diff changeset
130 data[ i] = cos_a * lines[i] - sin_a * lines[4+i]
878273a984c4 Improve Matrix representation, using float[16] instead of imbricated python lists.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 424
diff changeset
131 data[4+i] = sin_a * lines[i] + cos_a * lines[4+i]