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annotate pytouhou/utils/matrix.pyx @ 427:0604f4fbbe3c

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Move the depth buffer clear outside of scissor, as per apitrace’s advice.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Sat, 03 Aug 2013 15:48:51 +0200
parents f4d76d3d6f2a
children 878273a984c4
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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 float* matrix_to_floats(Matrix self):
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20 for i in xrange(4):
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21 for j in xrange(4):
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22 self.c_data[i*4+j] = self.data[i][j]
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23 return self.c_data
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26 cdef class Matrix:
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27 def __cinit__(self):
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28 self.c_data = <float*>malloc(16 * sizeof(float))
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31 def __init__(self, data=None):
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32 self.data = data or [[1, 0, 0, 0],
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33 [0, 1, 0, 0],
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34 [0, 0, 1, 0],
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35 [0, 0, 0, 1]]
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37
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38 def __dealloc__(self):
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39 free(self.c_data)
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42 def __mul__(self, Matrix other):
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43 out = Matrix()
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44 d1 = self.data
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45 d2 = other.data
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46 d3 = out.data
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47 for i in xrange(4):
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48 for j in xrange(4):
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49 d3[i][j] = sum(d1[i][k] * d2[k][j] for k in xrange(4))
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50 return out
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53 cpdef flip(self):
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54 data = self.data
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55 a, b, c, d = data[0]
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56 data[0] = [-a, -b, -c, -d]
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59 cpdef scale(self, x, y, z):
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60 d1 = self.data
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61 d1[0] = [a * x for a in d1[0]]
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62 d1[1] = [a * y for a in d1[1]]
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63 d1[2] = [a * z for a in d1[2]]
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66 cpdef scale2d(self, x, y):
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67 data = self.data
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68 d1a, d1b, d1c, d1d = data[0]
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69 d2a, d2b, d2c, d2d = data[1]
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70 data[0] = [d1a * x, d1b * x, d1c * x, d1d * x]
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71 data[1] = [d2a * y, d2b * y, d2c * y, d2d * y]
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74 cpdef translate(self, x, y, z):
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75 data = self.data
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76 a, b, c = data[3][:3]
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77 a, b, c = a * x, b * y, c * z
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78 d1a, d1b, d1c, d1d = data[0]
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79 d2a, d2b, d2c, d2d = data[1]
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80 d3a, d3b, d3c, d3d = data[2]
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81 data[0] = [d1a + a, d1b + a, d1c + a, d1d + a]
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82 data[1] = [d2a + b, d2b + b, d2c + b, d2d + b]
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83 data[2] = [d3a + c, d3b + c, d3c + c, d3d + c]
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85
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86 cpdef rotate_x(self, angle):
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87 d1 = self.data
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88 cos_a = cos(angle)
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89 sin_a = sin(angle)
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90 d1[1], d1[2] = ([cos_a * d1[1][i] - sin_a * d1[2][i] for i in range(4)],
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91 [sin_a * d1[1][i] + cos_a * d1[2][i] for i in range(4)])
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94 cpdef rotate_y(self, angle):
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95 d1 = 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 d1[0], d1[2] = ([cos_a * d1[0][i] + sin_a * d1[2][i] for i in range(4)],
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99 [- sin_a * d1[0][i] + cos_a * d1[2][i] for i in range(4)])
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101
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102 cpdef rotate_z(self, angle):
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103 d1 = self.data
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104 cos_a = cos(angle)
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105 sin_a = sin(angle)
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106 d1[0], d1[1] = ([cos_a * d1[0][i] - sin_a * d1[1][i] for i in range(4)],
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107 [sin_a * d1[0][i] + cos_a * d1[1][i] for i in range(4)])