[7504] | 1 | /* |
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[8495] | 2 | orxonox - the future of 3D-vertical-scrollers |
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[7504] | 3 | |
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[9935] | 4 | Copyright (C) 2006 orx |
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[7504] | 5 | |
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[8495] | 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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[7504] | 10 | |
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| 11 | ### File Specific: |
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[9935] | 12 | main-programmer: hdavid |
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[7504] | 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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[7760] | 20 | #include "p_node.h" |
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| 21 | #include "state.h" |
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[9936] | 22 | #include "shell_command.h" |
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[7760] | 23 | |
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[8495] | 24 | #include "glincl.h" |
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[9727] | 25 | #include "debug.h" |
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[7504] | 26 | |
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[9937] | 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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[7759] | 40 | #define GLX_GLXEXT_PROTOTYPES |
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| 41 | |
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[9716] | 42 | #include "class_id_DEPRECATED.h" |
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[9715] | 43 | ObjectListDefinitionID(VolFogEffect, CL_VOLFOG_EFFECT); |
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[9709] | 44 | CREATE_FACTORY(VolFogEffect); |
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[7504] | 45 | |
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[9936] | 46 | SHELL_COMMAND(activate, VolFogEffect, activateFog); |
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| 47 | SHELL_COMMAND(deactivate, VolFogEffect, deactivateFog); |
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[9935] | 48 | |
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| 49 | |
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[9937] | 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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[9936] | 52 | |
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| 53 | |
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[8495] | 54 | VolFogEffect::VolFogEffect(const TiXmlElement* root) { |
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[9686] | 55 | this->registerObject(this, VolFogEffect::_objectList); |
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[7504] | 56 | |
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[9936] | 57 | if (root != NULL) |
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| 58 | this->loadParams(root); |
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[7532] | 59 | |
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[9936] | 60 | // Initialize Effect |
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| 61 | this->init(); |
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[7546] | 62 | |
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[9936] | 63 | // Activate Effect |
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| 64 | if(fogActivate) |
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| 65 | this->activate(); |
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[7504] | 66 | } |
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| 67 | |
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| 68 | |
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[8495] | 69 | VolFogEffect::~VolFogEffect() { |
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[9936] | 70 | if(fogActivate) |
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[8495] | 71 | this->deactivate(); |
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[7504] | 72 | } |
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| 73 | |
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[8495] | 74 | void VolFogEffect::loadParams(const TiXmlElement* root) { |
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[9936] | 75 | WeatherEffect::loadParams(root); |
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[7504] | 76 | } |
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| 77 | |
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[8495] | 78 | void VolFogEffect::init() { |
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[9936] | 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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[7504] | 85 | |
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[9937] | 86 | //fogActivate = false; |
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| 87 | fogActivate = true; |
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[7546] | 88 | } |
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| 89 | |
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| 90 | |
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[8495] | 91 | void VolFogEffect::activate() { |
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[9936] | 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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[9937] | 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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[9936] | 113 | |
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| 114 | fogActivate = true; |
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[7504] | 115 | } |
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| 116 | |
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[8495] | 117 | void VolFogEffect::deactivate() { |
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[9936] | 118 | PRINTF(0)("Deactivating VolFogEffect\n"); |
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| 119 | |
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| 120 | fogActivate = false; |
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[7504] | 121 | } |
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| 122 | |
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[7520] | 123 | |
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[7516] | 124 | /** |
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[9935] | 125 | * draws the effect |
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[7652] | 126 | */ |
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[8495] | 127 | void VolFogEffect::draw() const { |
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[7760] | 128 | |
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[9936] | 129 | if(!fogActivate) |
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| 130 | return; |
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[9937] | 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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[7557] | 178 | } |
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[7546] | 179 | |
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| 180 | |
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[7516] | 181 | /** |
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[7652] | 182 | * ticks the effect if there is any time dependancy |
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| 183 | */ |
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[8495] | 184 | void VolFogEffect::tick(float dt) {} |
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