1 | /* |
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2 | orxonox - the future of 3D-vertical-scrollers |
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3 | |
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4 | Copyright (C) 2006 orx |
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5 | |
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6 | This program is free software; you can redistribute it and/or modify |
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7 | it under the terms of the GNU General Public License as published by |
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8 | the Free Software Foundation; either version 2, or (at your option) |
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9 | any later version. |
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10 | |
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11 | ### File Specific: |
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12 | main-programmer: hdavid |
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13 | */ |
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14 | |
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15 | #include "volfog_effect.h" |
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16 | |
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17 | #include "util/loading/load_param.h" |
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18 | #include "util/loading/factory.h" |
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19 | |
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20 | #include "p_node.h" |
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21 | #include "state.h" |
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22 | #include "shell_command.h" |
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23 | |
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24 | #include "glincl.h" |
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25 | #include "debug.h" |
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26 | |
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27 | //#include <GL/glext.h> |
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28 | #include <SDL.h> |
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29 | |
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30 | /* |
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31 | ////////////////////////////////// |
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32 | #ifndef APIENTRY |
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33 | #define APIENTRY |
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34 | #endif |
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35 | #ifndef APIENTRYP |
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36 | #define APIENTRYP APIENTRY * |
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37 | #endif |
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38 | /////////////////////////////////// |
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39 | */ |
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40 | #define GLX_GLXEXT_PROTOTYPES |
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41 | |
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42 | #include "class_id_DEPRECATED.h" |
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43 | ObjectListDefinitionID(VolFogEffect, CL_VOLFOG_EFFECT); |
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44 | CREATE_FACTORY(VolFogEffect); |
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45 | |
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46 | SHELL_COMMAND(activate, VolFogEffect, activateFog); |
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47 | SHELL_COMMAND(deactivate, VolFogEffect, deactivateFog); |
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48 | |
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49 | |
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50 | //typedef void (APIENTRY * PFNGLFOGCOORDFEXTPROC) (GLfloat coord); // Declare Function Prototype |
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51 | //PFNGLFOGCOORDFEXTPROC glFogCoordfEXT = NULL; // Our glFogCoordfEXT Function |
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52 | |
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53 | |
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54 | VolFogEffect::VolFogEffect(const TiXmlElement* root) { |
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55 | this->registerObject(this, VolFogEffect::_objectList); |
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56 | |
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57 | if (root != NULL) |
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58 | this->loadParams(root); |
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59 | |
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60 | // Initialize Effect |
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61 | this->init(); |
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62 | |
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63 | // Activate Effect |
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64 | if(fogActivate) |
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65 | this->activate(); |
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66 | } |
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67 | |
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68 | |
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69 | VolFogEffect::~VolFogEffect() { |
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70 | if(fogActivate) |
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71 | this->deactivate(); |
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72 | } |
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73 | |
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74 | void VolFogEffect::loadParams(const TiXmlElement* root) { |
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75 | WeatherEffect::loadParams(root); |
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76 | } |
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77 | |
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78 | void VolFogEffect::init() { |
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79 | PRINTF(0)("Initalize VolFogEffect\n"); |
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80 | |
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81 | fogColor[0] = 0.6f; |
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82 | fogColor[1] = 0.3f; |
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83 | fogColor[2] = 0.0f; |
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84 | fogColor[3] = 1.0f; |
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85 | |
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86 | //fogActivate = false; |
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87 | fogActivate = true; |
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88 | } |
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89 | |
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90 | |
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91 | void VolFogEffect::activate() { |
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92 | PRINTF(0)("Activating VolFogEffect\n"); |
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93 | |
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94 | // Test whether the extension exists |
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95 | if (!glewIsSupported("GL_EXT_fog_coord")) |
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96 | { |
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97 | PRINTF(0)("Can't activate volumetric fog, GL_EXT_fog_coord extension is misssing\n"); |
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98 | return; |
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99 | } |
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100 | |
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101 | // Set Up Fog |
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102 | //glEnable(GL_FOG); // Enable Fog |
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103 | glFogi(GL_FOG_MODE, GL_LINEAR); // Fog Fade Is Linear |
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104 | glFogfv(GL_FOG_COLOR, fogColor); // Set The Fog Color |
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105 | glFogf(GL_FOG_START, 1.0f); // Set The Fog Start |
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106 | glFogf(GL_FOG_END, 0.0f); // Set The Fog End |
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107 | glHint(GL_FOG_HINT, GL_NICEST); // Per-Pixel Fog Calculation |
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108 | |
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109 | |
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110 | glFogCoordfEXT = (PFNGLFOGCOORDFEXTPROC) SDL_GL_GetProcAddress("glFogCoordfEXT"); |
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111 | |
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112 | glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FOG_COORDINATE_EXT); // Set Fog Based On Vertice Coordinates |
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113 | |
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114 | fogActivate = true; |
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115 | } |
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116 | |
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117 | void VolFogEffect::deactivate() { |
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118 | PRINTF(0)("Deactivating VolFogEffect\n"); |
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119 | |
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120 | fogActivate = false; |
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121 | } |
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122 | |
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123 | |
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124 | /** |
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125 | * draws the effect |
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126 | */ |
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127 | void VolFogEffect::draw() const { |
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128 | |
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129 | if(!fogActivate) |
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130 | return; |
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131 | |
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132 | glPushAttrib(GL_ENABLE_BIT); |
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133 | glDisable(GL_LIGHTING); |
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134 | glDisable(GL_BLEND); |
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135 | glEnable(GL_FOG); // Enable Fog |
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136 | |
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137 | glPushMatrix(); |
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138 | |
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139 | |
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140 | |
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141 | glBegin(GL_QUADS); // Back Wall |
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142 | glFogCoordfEXT( 0.0f); glVertex3f(-2.5f,-2.5f,-15.0f); |
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143 | glFogCoordfEXT( 0.0f); glVertex3f( 2.5f,-2.5f,-15.0f); |
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144 | glFogCoordfEXT( 0.0f); glVertex3f( 2.5f, 2.5f,-15.0f); |
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145 | glFogCoordfEXT( 0.0f); glVertex3f(-2.5f, 2.5f,-15.0f); |
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146 | glEnd(); |
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147 | |
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148 | glBegin(GL_QUADS); // Floor |
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149 | glFogCoordfEXT( 0.0f); glVertex3f(-2.5f,-2.5f,-15.0f); |
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150 | glFogCoordfEXT( 0.0f); glVertex3f( 2.5f,-2.5f,-15.0f); |
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151 | glFogCoordfEXT( 1.0f); glVertex3f( 2.5f,-2.5f, 15.0f); |
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152 | glFogCoordfEXT( 1.0f); glVertex3f(-2.5f,-2.5f, 15.0f); |
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153 | glEnd(); |
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154 | |
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155 | glBegin(GL_QUADS); // Roof |
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156 | glFogCoordfEXT( 0.0f); glVertex3f(-2.5f, 2.5f,-15.0f); |
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157 | glFogCoordfEXT( 0.0f); glVertex3f( 2.5f, 2.5f,-15.0f); |
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158 | glFogCoordfEXT( 1.0f); glVertex3f( 2.5f, 2.5f, 15.0f); |
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159 | glFogCoordfEXT( 1.0f); glVertex3f(-2.5f, 2.5f, 15.0f); |
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160 | glEnd(); |
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161 | |
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162 | glBegin(GL_QUADS); // Right Wall |
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163 | glFogCoordfEXT( 1.0f); glVertex3f( 2.5f,-2.5f, 15.0f); |
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164 | glFogCoordfEXT( 1.0f); glVertex3f( 2.5f, 2.5f, 15.0f); |
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165 | glFogCoordfEXT( 0.0f); glVertex3f( 2.5f, 2.5f,-15.0f); |
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166 | glFogCoordfEXT( 0.0f); glVertex3f( 2.5f,-2.5f,-15.0f); |
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167 | glEnd(); |
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168 | |
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169 | glBegin(GL_QUADS); // Left Wall |
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170 | glFogCoordfEXT( 1.0f); glVertex3f(-2.5f,-2.5f, 15.0f); |
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171 | glFogCoordfEXT( 1.0f); glVertex3f(-2.5f, 2.5f, 15.0f); |
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172 | glFogCoordfEXT( 0.0f); glVertex3f(-2.5f, 2.5f,-15.0f); |
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173 | glFogCoordfEXT( 0.0f); glVertex3f(-2.5f,-2.5f,-15.0f); |
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174 | glEnd(); |
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175 | |
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176 | glPopMatrix(); |
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177 | glPopAttrib(); |
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178 | } |
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179 | |
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180 | |
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181 | /** |
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182 | * ticks the effect if there is any time dependancy |
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183 | */ |
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184 | void VolFogEffect::tick(float dt) {} |
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