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annotate pytouhou/utils/vector.pyx @ 612:73f134f84c7f

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Request a RGB888 context, since SDL2’s default of RGB332 sucks. On X11/GLX, it will select the first config available, that is the best one, while on EGL it will iterate over them to select the one closest to what the application requested. Of course, anything lower than RGB888 looks bad and we really don’t want that.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Thu, 26 Mar 2015 20:20:37 +0100
parents 7f016dfbdfb1
children
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1 # -*- encoding: utf-8 -*-
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2 ##
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3 ## Copyright (C) 2012 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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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 sqrt
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16 cimport cython
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19 cdef Vector sub(Vector vec1, Vector vec2):
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20 return Vector(vec1.x - vec2.x,
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21 vec1.y - vec2.y,
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22 vec1.z - vec2.z)
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25 cdef Vector cross(Vector vec1, Vector vec2):
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26 return Vector(vec1.y * vec2.z - vec2.y * vec1.z,
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27 vec1.z * vec2.x - vec2.z * vec1.x,
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28 vec1.x * vec2.y - vec2.x * vec1.y)
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31 cdef float dot(Vector vec1, Vector vec2) nogil:
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32 return vec1.x * vec2.x + vec2.y * vec1.y + vec1.z * vec2.z
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35 @cython.cdivision(True)
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36 cdef Vector normalize(Vector vec):
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37 cdef float normal
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39 normal = 1 / sqrt(vec.x * vec.x + vec.y * vec.y + vec.z * vec.z)
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40 return Vector(vec.x * normal, vec.y * normal, vec.z * normal)