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annotate pytouhou/utils/matrix.pyx @ 513:5e3e0b09a531

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Move the OpenGL backend to its own package.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Thu, 05 Dec 2013 02:16:31 +0100
parents 26c082870dcf
children 6e3b3d5d4691
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52
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 from libc.string cimport memcpy
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19
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20 cdef float[16] identity
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21 identity[:] = [1, 0, 0, 0,
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22 0, 1, 0, 0,
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23 0, 0, 1, 0,
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24 0, 0, 0, 1]
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26
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27 cdef class Matrix:
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28 def __init__(self, data=None):
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29 if data is not None:
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30 for i in xrange(16):
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31 self.data[i] = data[i]
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32 else:
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33 memcpy(self.data, identity, 16 * sizeof(float))
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35
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36 def __mul__(Matrix self, Matrix other):
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37 cdef float *d1, *d2, *d3
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38
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39 out = Matrix()
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40 d1 = self.data
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41 d2 = other.data
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42 d3 = out.data
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43 for i in xrange(4):
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44 for j in xrange(4):
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45 d3[4*i+j] = 0
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46 for k in xrange(4):
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47 d3[4*i+j] += d1[4*i+k] * d2[4*k+j]
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48 return out
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51 cdef void flip(self) nogil:
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52 cdef float *data
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53
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54 data = self.data
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55 for i in xrange(4):
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56 data[i] = -data[i]
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59 cdef void scale(self, float x, float y, float z) nogil:
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60 cdef float *data, coordinate[3]
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61
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62 data = self.data
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63 coordinate[0] = x
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64 coordinate[1] = y
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65 coordinate[2] = z
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66
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67 for i in xrange(3):
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68 for j in xrange(4):
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69 data[4*i+j] *= coordinate[i]
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72 cdef void scale2d(self, float x, float y) nogil:
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73 cdef float *data
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74
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75 data = self.data
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77 data[ i] *= x
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78 data[4+i] *= y
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81 cdef void translate(self, float x, float y, float z) nogil:
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82 cdef float *data, coordinate[3], item[3]
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83
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84 data = self.data
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85 coordinate[0] = x
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86 coordinate[1] = y
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87 coordinate[2] = z
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88 for i in xrange(3):
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89 item[i] = data[12+i] * coordinate[i]
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90
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91 for i in xrange(3):
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92 for j in xrange(4):
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93 data[4*i+j] += item[i]
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96 cdef void rotate_x(self, float angle) nogil:
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97 cdef float cos_a, sin_a
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98 cdef float lines[8], *data
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99
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100 data = self.data
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101 cos_a = cos(angle)
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102 sin_a = sin(angle)
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104 lines[i] = data[i+4]
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105 for i in xrange(4):
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106 data[4+i] = cos_a * lines[i] - sin_a * lines[4+i]
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107 data[8+i] = sin_a * lines[i] + cos_a * lines[4+i]
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109
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110 cdef void rotate_y(self, float angle) nogil:
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111 cdef float cos_a, sin_a
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112 cdef float lines[8], *data
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113
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114 data = self.data
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115 cos_a = cos(angle)
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116 sin_a = sin(angle)
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117 for i in xrange(4):
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118 lines[i] = data[i]
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119 lines[i+4] = data[i+8]
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121 data[ i] = cos_a * lines[i] + sin_a * lines[4+i]
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122 data[8+i] = -sin_a * lines[i] + cos_a * lines[4+i]
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124
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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125 cdef void rotate_z(self, float angle) nogil:
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parents: 424
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126 cdef float cos_a, sin_a
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parents: 424
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127 cdef float lines[8], *data
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parents: 424
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128
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129 data = self.data
28
f405b947624d Massive sprite updating/matrix handling optimizations
Thibaut Girka <thib@sitedethib.com>
parents: 4
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130 cos_a = cos(angle)
f405b947624d Massive sprite updating/matrix handling optimizations
Thibaut Girka <thib@sitedethib.com>
parents: 4
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131 sin_a = sin(angle)
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parents: 424
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132 for i in xrange(8):
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parents: 424
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133 lines[i] = data[i]
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parents: 424
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134 for i in xrange(4):
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parents: 424
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135 data[ i] = cos_a * lines[i] - sin_a * lines[4+i]
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 424
diff changeset
136 data[4+i] = sin_a * lines[i] + cos_a * lines[4+i]