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annotate pytouhou/opengl/gamerenderer.py @ 126:9d7129ee2c4f

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Fix a rendering bug
author Thibaut Girka <thib@sitedethib.com>
date Sat, 10 Sep 2011 15:35:18 +0200
parents 0313ca2c50e9
children 11ab06f4c4c6
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108
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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 import struct
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16 from itertools import chain
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17 import ctypes
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18
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19 import pyglet
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20 from pyglet.gl import *
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21
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22 from pytouhou.opengl.texture import TextureManager
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23 from pytouhou.opengl.sprite import get_sprite_rendering_data
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24 from pytouhou.opengl.background import get_background_rendering_data
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25
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26
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27 MAX_ELEMENTS = 10000
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29
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30 class GameRenderer(pyglet.window.Window):
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31 def __init__(self, resource_loader, game=None, background=None):
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32 pyglet.window.Window.__init__(self, caption='PyTouhou', resizable=False)
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33 self.keys = pyglet.window.key.KeyStateHandler()
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34 self.push_handlers(self.keys)
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35
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36 self.texture_manager = TextureManager(resource_loader)
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37
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38 self.fps_display = pyglet.clock.ClockDisplay()
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39
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40 self.game = game
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41 self.background = background
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42
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43
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44 def start(self, width=384, height=448):
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45 self.set_size(width, height)
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46
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47 # Initialize OpenGL
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48 glMatrixMode(GL_PROJECTION)
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49 glLoadIdentity()
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50 gluPerspective(30, float(width)/float(height),
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51 101010101./2010101., 101010101./10101.)
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52
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53 glEnable(GL_BLEND)
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54 glEnable(GL_TEXTURE_2D)
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55 glEnable(GL_FOG)
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56 glHint(GL_FOG_HINT, GL_NICEST)
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57 glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST)
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58 glEnableClientState(GL_COLOR_ARRAY)
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59 glEnableClientState(GL_VERTEX_ARRAY)
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60 glEnableClientState(GL_TEXTURE_COORD_ARRAY)
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61
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62 # Allocate buffers
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63 buff = ctypes.c_buffer(MAX_ELEMENTS * 4 * (3 * 4 + 2 * 4 + 4))
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64 self.buffers = (buff,
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65 ctypes.byref(buff, 3 * 4),
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66 ctypes.byref(buff, 3 * 4 + 2 * 4))
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67
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68 pyglet.clock.schedule_interval(self.update, 1./120.)
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69 pyglet.app.run()
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70
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71
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72 def on_resize(self, width, height):
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73 glViewport(0, 0, width, height)
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74
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75
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76 def update(self, dt):
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77 if self.background:
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78 self.background.update(self.game.game_state.frame)
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79 if self.game:
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80 self.game.run_iter(0) #TODO: self.keys...
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81
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82
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83 def on_key_press(self, symbol, modifiers):
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84 if symbol == pyglet.window.key.ESCAPE:
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85 pyglet.app.exit()
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86 # XXX: Fullscreen will be enabled the day pyglet stops sucking
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87 elif symbol == pyglet.window.key.F11:
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88 self.set_fullscreen(not self.fullscreen)
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89
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90
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91 def render_elements(self, elements):
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92 texture_manager = self.texture_manager
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93
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94 pack_data = struct.Struct('fff ff BBBB' * 4).pack_into
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95 _vertices, _uvs, _colors = self.buffers
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96
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97 nb_vertices = 0
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98 indices_by_texture = {}
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99
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100 for element in elements:
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101 sprite = element._sprite
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102 if sprite:
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103 ox, oy = element.x, element.y
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104 key, (vertices, uvs, colors) = get_sprite_rendering_data(sprite)
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105 rec = indices_by_texture.setdefault(key, [])
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106
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107 # Pack data in buffer
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108 (x1, y1, z1), (x2, y2, z2), (x3, y3, z3), (x4, y4, z4) = vertices
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109 r1, g1, b1, a1, r2, g2, b2, a2, r3, g3, b3, a3, r4, g4, b4, a4 = colors
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110 u1, v1, u2, v2, u3, v3, u4, v4 = uvs
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111 pack_data(_vertices, nb_vertices * (3 * 4 + 2 * 4 + 4),
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112 x1 + ox, y1 + oy, z1,
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113 u1, v1,
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114 r1, g1, b1, a1,
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115
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116 x2 + ox, y2 + oy, z2,
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117 u2, v2,
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118 r2, g2, b2, a2,
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119
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120 x3 + ox, y3 + oy, z3,
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121 u3, v3,
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122 r3, g3, b3, a3,
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123
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124 x4 + ox, y4 + oy, z4,
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125 u4, v4,
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126 r4, g4, b4, a4)
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127
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128 # Add indices
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129 index = nb_vertices
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130 rec.extend((index, index + 1, index + 2, index + 3))
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131
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132 nb_vertices += 4
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133
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134 glVertexPointer(3, GL_FLOAT, 24, _vertices)
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135 glTexCoordPointer(2, GL_FLOAT, 24, _uvs)
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136 glColorPointer(4, GL_UNSIGNED_BYTE, 24, _colors)
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137
126
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138 for (texture_key, blendfunc), indices in indices_by_texture.items():
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139 nb_indices = len(indices)
125
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140 indices = struct.pack(str(nb_indices) + 'H', *indices)
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141 glBlendFunc(GL_SRC_ALPHA, (GL_ONE_MINUS_SRC_ALPHA, GL_ONE)[blendfunc])
119
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142 glBindTexture(GL_TEXTURE_2D, texture_manager[texture_key].id)
125
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143 glDrawElements(GL_QUADS, nb_indices, GL_UNSIGNED_SHORT, indices)
108
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144
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145
119
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146 def on_draw(self):
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147 glClear(GL_DEPTH_BUFFER_BIT)
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148
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149 back = self.background
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150 game = self.game
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151 texture_manager = self.texture_manager
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152
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153 if back is not None:
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154 fog_b, fog_g, fog_r, fog_start, fog_end = back.fog_interpolator.values
108
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155 x, y, z = back.position_interpolator.values
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156 dx, dy, dz = back.position2_interpolator.values
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157
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158 glFogi(GL_FOG_MODE, GL_LINEAR)
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159 glFogf(GL_FOG_START, fog_start)
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160 glFogf(GL_FOG_END, fog_end)
119
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161 glFogfv(GL_FOG_COLOR, (GLfloat * 4)(fog_r / 255., fog_g / 255., fog_b / 255., 1.))
108
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162
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163 glMatrixMode(GL_MODELVIEW)
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164 glLoadIdentity()
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165 # Some explanations on the magic constants:
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166 # 192. = 384. / 2. = width / 2.
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167 # 224. = 448. / 2. = height / 2.
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168 # 835.979370 = 224./math.tan(math.radians(15)) = (height/2.)/math.tan(math.radians(fov/2))
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169 # This is so that objects on the (O, x, y) plane use pixel coordinates
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170 gluLookAt(192., 224., - 835.979370 * dz,
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171 192. + dx, 224. - dy, 0., 0., -1., 0.)
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172 glTranslatef(-x, -y, -z)
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173
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174 glEnable(GL_DEPTH_TEST)
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175 for (texture_key, blendfunc), (nb_vertices, vertices, uvs, colors) in get_background_rendering_data(back):
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176 glBlendFunc(GL_SRC_ALPHA, (GL_ONE_MINUS_SRC_ALPHA, GL_ONE)[blendfunc])
119
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177 glBindTexture(GL_TEXTURE_2D, texture_manager[texture_key].id)
108
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178 glVertexPointer(3, GL_FLOAT, 0, vertices)
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179 glTexCoordPointer(2, GL_FLOAT, 0, uvs)
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180 glColorPointer(4, GL_UNSIGNED_BYTE, 0, colors)
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181 glDrawArrays(GL_QUADS, 0, nb_vertices)
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182 glDisable(GL_DEPTH_TEST)
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183 else:
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184 glClear(GL_COLOR_BUFFER_BIT)
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185
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186 if game is not None:
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187 glMatrixMode(GL_MODELVIEW)
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188 glLoadIdentity()
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189 # Some explanations on the magic constants:
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190 # 192. = 384. / 2. = width / 2.
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191 # 224. = 448. / 2. = height / 2.
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192 # 835.979370 = 224./math.tan(math.radians(15)) = (height/2.)/math.tan(math.radians(fov/2))
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193 # This is so that objects on the (O, x, y) plane use pixel coordinates
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194 gluLookAt(192., 224., - 835.979370,
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195 192., 224., 0., 0., -1., 0.)
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196
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197 glDisable(GL_FOG)
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198 self.render_elements(game.enemies)
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199 self.render_elements(game.game_state.bullets)
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200 glEnable(GL_FOG)
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201
119
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202 #TODO
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203 glMatrixMode(GL_MODELVIEW)
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204 glLoadIdentity()
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205 gluLookAt(192., 224., 835.979370,
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206 192, 224., 0., 0., 1., 0.)
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207 self.fps_display.draw()
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208