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annotate pytouhou/opengl/gamerenderer.py @ 121:1bc0ad774ed4

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More impressive data, use a wider range of things, and document things!
author Thibaut Girka <thib@sitedethib.com>
date Fri, 09 Sep 2011 21:36:53 +0200
parents 4300a832f033
children 174324a4da51
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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
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18 import pyglet
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19 from pyglet.gl import *
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20
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21 from pytouhou.opengl.texture import TextureManager
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22 from pytouhou.opengl.sprite import get_sprite_rendering_data
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23 from pytouhou.opengl.background import get_background_rendering_data
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24
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25
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26 class GameRenderer(pyglet.window.Window):
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27 def __init__(self, resource_loader, game=None, background=None):
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28 pyglet.window.Window.__init__(self, caption='PyTouhou', resizable=False)
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29 self.keys = pyglet.window.key.KeyStateHandler()
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30 self.push_handlers(self.keys)
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31
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32 self.texture_manager = TextureManager(resource_loader)
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33
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34 self.fps_display = pyglet.clock.ClockDisplay()
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35
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36 self.game = game
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37 self.background = background
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38
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39
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40 def start(self, width=384, height=448):
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41 self.set_size(width, height)
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42
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43 # Initialize OpenGL
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44 glMatrixMode(GL_PROJECTION)
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45 glLoadIdentity()
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46 gluPerspective(30, float(width)/float(height),
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47 101010101./2010101., 101010101./10101.)
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48
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49 glEnable(GL_BLEND)
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50 glEnable(GL_TEXTURE_2D)
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51 glEnable(GL_FOG)
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52 glHint(GL_FOG_HINT, GL_NICEST)
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53 glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST)
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54 glEnableClientState(GL_COLOR_ARRAY)
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55 glEnableClientState(GL_VERTEX_ARRAY)
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56 glEnableClientState(GL_TEXTURE_COORD_ARRAY)
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57
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58 pyglet.clock.schedule_interval(self.update, 1./120)
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59 pyglet.app.run()
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60
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61
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62 def on_resize(self, width, height):
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63 glViewport(0, 0, width, height)
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64
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65
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66 def update(self, dt):
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67 if self.background:
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68 self.background.update(self.game.game_state.frame)
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69 if self.game:
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70 self.game.run_iter(0) #TODO: self.keys...
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71
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72
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73 def on_key_press(self, symbol, modifiers):
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74 if symbol == pyglet.window.key.ESCAPE:
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75 pyglet.app.exit()
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76 # XXX: Fullscreen will be enabled the day pyglet stops sucking
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77 elif symbol == pyglet.window.key.F11:
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78 self.set_fullscreen(not self.fullscreen)
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79
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80
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81 def render_elements(self, elements):
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82 texture_manager = self.texture_manager
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83 objects_by_texture = {}
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84 for element in elements:
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85 sprite = element._sprite
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86 if sprite:
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87 ox, oy = element.x, element.y
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88 key, (vertices, uvs, colors) = get_sprite_rendering_data(sprite)
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89 rec = objects_by_texture.setdefault(key, ([], [], []))
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90 vertices = ((x + ox, y + oy, z) for x, y, z in vertices)
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91 rec[0].extend(vertices)
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92 rec[1].extend(uvs)
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93 rec[2].extend(colors)
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94
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95 for (texture_key, blendfunc), (vertices, uvs, colors) in objects_by_texture.items():
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96 nb_vertices = len(vertices)
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97 vertices = struct.pack(str(3 * nb_vertices) + 'f', *chain(*vertices))
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98 uvs = struct.pack(str(2 * nb_vertices) + 'f', *chain(*uvs))
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99 colors = struct.pack(str(4 * nb_vertices) + 'B', *chain(*colors))
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100 glBlendFunc(GL_SRC_ALPHA, (GL_ONE_MINUS_SRC_ALPHA, GL_ONE)[blendfunc])
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101 glBindTexture(GL_TEXTURE_2D, texture_manager[texture_key].id)
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102 glVertexPointer(3, GL_FLOAT, 0, vertices)
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103 glTexCoordPointer(2, GL_FLOAT, 0, uvs)
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104 glColorPointer(4, GL_UNSIGNED_BYTE, 0, colors)
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105 glDrawArrays(GL_QUADS, 0, nb_vertices)
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106
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107
119
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108 def on_draw(self):
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109 glClear(GL_DEPTH_BUFFER_BIT)
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110
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111 back = self.background
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112 game = self.game
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113 texture_manager = self.texture_manager
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114
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115 if back is not None:
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116 fog_b, fog_g, fog_r, fog_start, fog_end = back.fog_interpolator.values
108
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117 x, y, z = back.position_interpolator.values
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118 dx, dy, dz = back.position2_interpolator.values
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119
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120 glFogi(GL_FOG_MODE, GL_LINEAR)
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121 glFogf(GL_FOG_START, fog_start)
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122 glFogf(GL_FOG_END, fog_end)
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123 glFogfv(GL_FOG_COLOR, (GLfloat * 4)(fog_r / 255., fog_g / 255., fog_b / 255., 1.))
108
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124
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125 glMatrixMode(GL_MODELVIEW)
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126 glLoadIdentity()
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127 # Some explanations on the magic constants:
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128 # 192. = 384. / 2. = width / 2.
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129 # 224. = 448. / 2. = height / 2.
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130 # 835.979370 = 224./math.tan(math.radians(15)) = (height/2.)/math.tan(math.radians(fov/2))
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131 # This is so that objects on the (O, x, y) plane use pixel coordinates
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132 gluLookAt(192., 224., - 835.979370 * dz,
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133 192. + dx, 224. - dy, 0., 0., -1., 0.)
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134 glTranslatef(-x, -y, -z)
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135
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136 glEnable(GL_DEPTH_TEST)
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137 for (texture_key, blendfunc), (nb_vertices, vertices, uvs, colors) in get_background_rendering_data(back):
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138 glBlendFunc(GL_SRC_ALPHA, (GL_ONE_MINUS_SRC_ALPHA, GL_ONE)[blendfunc])
119
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139 glBindTexture(GL_TEXTURE_2D, texture_manager[texture_key].id)
108
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140 glVertexPointer(3, GL_FLOAT, 0, vertices)
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141 glTexCoordPointer(2, GL_FLOAT, 0, uvs)
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142 glColorPointer(4, GL_UNSIGNED_BYTE, 0, colors)
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143 glDrawArrays(GL_QUADS, 0, nb_vertices)
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144 glDisable(GL_DEPTH_TEST)
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145 else:
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146 glClear(GL_COLOR_BUFFER_BIT)
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147
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148 if game is not None:
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149 glMatrixMode(GL_MODELVIEW)
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150 glLoadIdentity()
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151 # Some explanations on the magic constants:
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152 # 192. = 384. / 2. = width / 2.
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153 # 224. = 448. / 2. = height / 2.
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154 # 835.979370 = 224./math.tan(math.radians(15)) = (height/2.)/math.tan(math.radians(fov/2))
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155 # This is so that objects on the (O, x, y) plane use pixel coordinates
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156 gluLookAt(192., 224., - 835.979370,
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157 192., 224., 0., 0., -1., 0.)
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158
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159 glDisable(GL_FOG)
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160 self.render_elements(game.enemies)
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161 self.render_elements(game.game_state.bullets)
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162 glEnable(GL_FOG)
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163
119
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164 #TODO
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165 glMatrixMode(GL_MODELVIEW)
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166 glLoadIdentity()
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167 gluLookAt(192., 224., 835.979370,
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168 192, 224., 0., 0., 1., 0.)
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169 self.fps_display.draw()
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170