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2 | |
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3 | /* |
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4 | orxonox - the future of 3D-vertical-scrollers |
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5 | |
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6 | Copyright (C) 2004 orx |
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7 | |
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8 | This program is free software; you can redistribute it and/or modify |
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9 | it under the terms of the GNU General Public License as published by |
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10 | the Free Software Foundation; either version 2, or (at your option) |
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11 | any later version. |
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12 | |
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13 | ### File Specific: |
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14 | main-programmer: Benjamin Grauer |
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15 | co-programmer: ... |
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16 | */ |
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17 | |
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18 | |
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19 | #include "light.h" |
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20 | |
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21 | #include "glincl.h" |
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22 | |
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23 | using namespace std; |
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24 | |
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25 | //! Definition of the Lights |
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26 | int lightsV[] = {GL_LIGHT0, GL_LIGHT1, GL_LIGHT2, GL_LIGHT3, GL_LIGHT4, GL_LIGHT5, GL_LIGHT6, GL_LIGHT7}; |
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27 | |
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28 | |
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29 | /** |
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30 | \brief standard constructor for a Light |
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31 | */ |
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32 | Light::Light () |
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33 | { |
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34 | this->setClassName ("Light"); |
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35 | |
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36 | glEnable (GL_LIGHTING); |
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37 | this->setAmbientColor(.3, .3, .3); |
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38 | this->lights = new LightValue*[NUMBEROFLIGHTS]; |
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39 | for (int i = 0; i < NUMBEROFLIGHTS; i++) |
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40 | lights[i] = NULL; |
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41 | this->currentLight = NULL; |
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42 | } |
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43 | |
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44 | /** |
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45 | \brief standard deconstructor |
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46 | |
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47 | first disables Lighting |
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48 | then deletes all the lights |
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49 | then deletes the rest of the allocated memory |
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50 | and in the end sets the singleton Reference to zero. |
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51 | */ |
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52 | Light::~Light () |
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53 | { |
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54 | glDisable(GL_LIGHTING); |
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55 | |
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56 | for (int i = 0; i < NUMBEROFLIGHTS; i++) |
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57 | this->deleteLight(i); |
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58 | delete lights; |
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59 | Light::singletonRef = NULL; |
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60 | } |
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61 | |
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62 | /** |
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63 | \brief singleton-Reference to the Light-class |
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64 | */ |
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65 | Light* Light::singletonRef = NULL; |
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66 | |
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67 | /** |
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68 | \returns The Instance of the Lights |
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69 | */ |
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70 | Light* Light::getInstance(void) |
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71 | { |
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72 | if (singletonRef) |
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73 | return singletonRef; |
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74 | else |
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75 | return Light::singletonRef = new Light(); |
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76 | } |
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77 | |
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78 | /** |
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79 | \brief initializes a new Light with default values, and enables GL_LIGHTING |
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80 | */ |
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81 | void Light::init(int lightNumber) |
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82 | { |
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83 | PRINTF(3)("initializing Light number %d.\n", lightNumber); |
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84 | // enable The light |
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85 | glEnable(lightsV[lightNumber]); |
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86 | this->currentLight = lights[lightNumber] = new LightValue; |
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87 | |
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88 | // set default values |
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89 | this->currentLight->lightNumber = lightNumber; |
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90 | this->setPosition(0.0, 0.0, 0.0); |
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91 | this->setDiffuseColor(1.0, 1.0, 1.0); |
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92 | this->setSpecularColor(1.0, 1.0, 1.0); |
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93 | } |
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94 | |
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95 | /** |
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96 | \brief Adds a new Light, by selecting the First free slot. |
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97 | |
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98 | if no slot is free error |
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99 | */ |
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100 | int Light::addLight(void) |
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101 | { |
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102 | for (int i = 0; i < NUMBEROFLIGHTS; i++) |
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103 | if (!this->lights[i]) |
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104 | return addLight(i); |
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105 | PRINTF(1)("no more light slots availiable. All %d already taken\n", NUMBEROFLIGHTS); |
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106 | return -1; |
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107 | } |
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108 | |
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109 | /** |
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110 | \brief Adds a new Light |
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111 | \param lightNumber The number of the light to add. |
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112 | |
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113 | if the Number is not free: warn, automatically choose another slot. |
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114 | */ |
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115 | int Light::addLight(int lightNumber) |
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116 | { |
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117 | if (this->lights[lightNumber]) |
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118 | { |
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119 | PRINTF(2)("Lightslot %d is allready taken, trying another one\n", lightNumber); |
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120 | return this->addLight(); |
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121 | } |
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122 | this->init(lightNumber); |
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123 | this->currentLight = this->lights[lightNumber]; |
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124 | return lightNumber; |
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125 | } |
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126 | |
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127 | /** |
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128 | \brief select the light to work with |
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129 | \param lightNumber the light to work with |
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130 | */ |
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131 | void Light::editLightNumber(int lightNumber) |
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132 | { |
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133 | if (!this->currentLight) |
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134 | { |
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135 | PRINTF(1)("no Light defined yet\n"); |
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136 | return; |
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137 | } |
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138 | |
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139 | this->currentLight = lights[lightNumber]; |
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140 | } |
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141 | |
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142 | /** |
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143 | \brief Delete the current Light |
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144 | */ |
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145 | void Light::deleteLight(void) |
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146 | { |
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147 | if (!this->currentLight) |
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148 | { |
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149 | PRINTF(1)("no Light defined yet\n"); |
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150 | return; |
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151 | } |
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152 | |
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153 | this->deleteLight(this->currentLight->lightNumber); |
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154 | } |
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155 | |
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156 | /** |
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157 | \brief delete light. |
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158 | \param lightNumber the number of the light to delete |
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159 | */ |
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160 | void Light::deleteLight(int lightNumber) |
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161 | { |
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162 | if (this->lights[lightNumber]) |
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163 | { |
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164 | PRINTF(3)("deleting Light number %d\n", lightNumber); |
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165 | delete this->lights[lightNumber]; |
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166 | glDisable(lightsV[lightNumber]); |
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167 | this->lights[lightNumber] = NULL; |
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168 | } |
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169 | } |
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170 | |
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171 | // set Attributes |
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172 | /** |
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173 | \brief Sets a Position for the Light. |
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174 | \param position The new position of the Light. |
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175 | \todo patrick: is it ok to set a Light Position even if it is derived from p_node?? |
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176 | */ |
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177 | void Light::setPosition(Vector position) |
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178 | { |
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179 | if (!this->currentLight) |
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180 | { |
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181 | PRINTF(1)("no Light defined yet\n"); |
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182 | return; |
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183 | } |
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184 | this->currentLight->lightPosition[0] = position.x; |
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185 | this->currentLight->lightPosition[1] = position.y; |
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186 | this->currentLight->lightPosition[2] = position.z; |
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187 | this->currentLight->lightPosition[3] = 0.0; |
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188 | |
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189 | glLightfv (GL_LIGHT0, GL_POSITION, this->currentLight->lightPosition); |
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190 | } |
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191 | |
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192 | /** |
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193 | \brief Sets a Position for the Light. |
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194 | \param x the x-coordinate |
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195 | \param y the y-coordinate |
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196 | \param z the z-coordinate |
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197 | */ |
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198 | void Light::setPosition(GLfloat x, GLfloat y, GLfloat z) |
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199 | { |
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200 | if (!this->currentLight) |
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201 | { |
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202 | PRINTF(1)("no Light defined yet\n"); |
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203 | return; |
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204 | } |
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205 | |
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206 | this->currentLight->lightPosition[0] = x; |
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207 | this->currentLight->lightPosition[1] = y; |
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208 | this->currentLight->lightPosition[2] = z; |
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209 | this->currentLight->lightPosition[3] = 0.0; |
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210 | |
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211 | glLightfv (GL_LIGHT0, GL_POSITION, this->currentLight->lightPosition); |
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212 | } |
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213 | |
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214 | /** |
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215 | \brief sets an emitting Diffuse color for the Light |
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216 | \param r red |
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217 | \param g green |
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218 | \param b blue |
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219 | */ |
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220 | void Light::setDiffuseColor(GLfloat r, GLfloat g, GLfloat b) |
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221 | { |
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222 | if (!this->currentLight) |
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223 | { |
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224 | PRINTF(1)("no Light defined yet\n"); |
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225 | return; |
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226 | } |
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227 | |
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228 | this->currentLight->diffuseColor[0] = r; |
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229 | this->currentLight->diffuseColor[1] = g; |
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230 | this->currentLight->diffuseColor[2] = b; |
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231 | this->currentLight->diffuseColor[3] = 1.0; |
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232 | |
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233 | glLightfv (GL_LIGHT0, GL_DIFFUSE, this->currentLight->diffuseColor); |
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234 | } |
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235 | |
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236 | |
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237 | /** |
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238 | \brief sets an emitting Ambient color for the Light |
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239 | \param r red |
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240 | \param g green |
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241 | \param b blue |
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242 | */ |
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243 | void Light::setSpecularColor(GLfloat r, GLfloat g, GLfloat b) |
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244 | { |
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245 | if (!this->currentLight) |
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246 | { |
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247 | PRINTF(1)("no Light defined yet\n"); |
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248 | return; |
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249 | } |
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250 | |
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251 | this->currentLight->specularColor[0] = r; |
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252 | this->currentLight->specularColor[1] = g; |
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253 | this->currentLight->specularColor[2] = b; |
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254 | this->currentLight->specularColor[3] = 1.0; |
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255 | |
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256 | glLightfv (GL_LIGHT0, GL_SPECULAR, this->currentLight->specularColor); |
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257 | } |
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258 | |
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259 | /** |
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260 | \brief Sets the AttenuationType of this Light Source |
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261 | \param type the AttenuationType to set |
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262 | \param factor the Factor to multipy the attenuation with |
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263 | |
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264 | this actually just sets the following: glLightf(currentLight, type, factor) |
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265 | */ |
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266 | void Light::setAttenuation(AttenuationType type, float factor) |
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267 | { |
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268 | if (!this->currentLight) |
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269 | { |
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270 | PRINTF(1)("no Light defined yet\n"); |
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271 | return; |
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272 | } |
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273 | this->currentLight->attenuationFactor = factor; |
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274 | this->currentLight->attenuationType = type; |
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275 | switch (type) |
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276 | { |
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277 | case CONSTANT: |
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278 | glLightf(lightsV[this->currentLight->lightNumber], GL_CONSTANT_ATTENUATION, factor); |
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279 | break; |
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280 | case LINEAR: |
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281 | glLightf(lightsV[this->currentLight->lightNumber], GL_LINEAR_ATTENUATION, factor); |
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282 | break; |
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283 | case QUADRATIC: |
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284 | glLightf(lightsV[this->currentLight->lightNumber], GL_QUADRATIC_ATTENUATION, factor); |
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285 | break; |
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286 | } |
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287 | } |
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288 | |
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289 | |
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290 | /** |
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291 | \brief sets the ambient Color of the Scene |
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292 | \param r red |
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293 | \param g green |
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294 | \param b blue |
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295 | */ |
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296 | void Light::setAmbientColor(GLfloat r, GLfloat g, GLfloat b) |
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297 | { |
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298 | this->ambientColor[0] = r; |
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299 | this->ambientColor[1] = g; |
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300 | this->ambientColor[2] = b; |
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301 | this->ambientColor[3] = 1.0; |
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302 | |
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303 | glLightfv (GL_LIGHT0, GL_AMBIENT, this->ambientColor); |
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304 | } |
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305 | |
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306 | /** |
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307 | \brief stets the direction of the Spot Light. |
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308 | \param direction The direction of the Spot Light. |
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309 | */ |
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310 | void Light::setSpotDirection(Vector direction) |
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311 | { |
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312 | this->currentLight->spotDirection[0] = direction.x; |
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313 | this->currentLight->spotDirection[1] = direction.y; |
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314 | this->currentLight->spotDirection[2] = direction.z; |
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315 | |
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316 | glLightfv(lightsV[this->currentLight->lightNumber], GL_SPOT_DIRECTION, this->currentLight->spotDirection); |
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317 | } |
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318 | |
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319 | |
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320 | /** |
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321 | \brief sets the cutoff angle of the Light. |
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322 | \param cutoff The cutoff angle. |
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323 | */ |
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324 | void Light::setSpotCutoff(GLfloat cutoff) |
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325 | { |
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326 | this->currentLight->spotCutoff = cutoff; |
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327 | glLightf(lightsV[this->currentLight->lightNumber], GL_SPOT_CUTOFF, cutoff); |
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328 | } |
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329 | |
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330 | |
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331 | // get Attributes |
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332 | |
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333 | /** |
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334 | \returns the Position of the Light |
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335 | */ |
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336 | Vector Light::getPosition(void) |
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337 | { |
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338 | if (!this->currentLight) |
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339 | { |
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340 | PRINTF(1)("no Light defined yet\n"); |
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341 | return Vector(.0, .0, .0); |
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342 | } |
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343 | else |
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344 | return getPosition(currentLight->lightNumber); |
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345 | } |
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346 | |
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347 | |
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348 | |
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349 | |
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350 | /** |
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351 | \brief outputs debug information about the Class and its lights |
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352 | */ |
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353 | void Light::debug(void) |
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354 | { |
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355 | PRINT(0)("=================================\n"); |
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356 | PRINT(0)("= DEBUG INFORMATION CLASS LIGHT =\n"); |
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357 | PRINT(0)("=================================\n"); |
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358 | PRINT(0)("Reference: %p\n", Light::singletonRef); |
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359 | if (this->currentLight) |
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360 | PRINT(0)("current Light Nr: %d\n", this->currentLight->lightNumber); |
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361 | PRINT(0)("Ambient Color: %f:%f:%f\n", this->ambientColor[0], this->ambientColor[0], this->ambientColor[0]); |
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362 | PRINT(0)("=== Lights ===\n"); |
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363 | for (int i = 0; i < NUMBEROFLIGHTS; i++) |
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364 | if (this->lights[i]) |
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365 | { |
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366 | PRINT(0)(":: %d :: -- reference %p\n", i, lights[i]); |
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367 | PRINT(0)(" GL-state: "); |
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368 | GLboolean param; |
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369 | glGetBooleanv(lightsV[i], ¶m); |
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370 | if (param) |
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371 | PRINT(0)("ON\n"); |
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372 | else |
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373 | PRINT(0)("OFF\n"); |
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374 | |
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375 | if (i != lights[i]->lightNumber) |
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376 | PRINTF(1)(" Lights are out of sync, this really should not happen,\n %d % should be equal.\n", i, lights[i]->lightNumber); |
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377 | PRINT(0)(" Position: %f/%f/%f\n", lights[i]->lightPosition[0], lights[i]->lightPosition[1], lights[i]->lightPosition[2]); |
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378 | PRINT(0)(" DiffuseColor: %f/%f/%f\n", lights[i]->diffuseColor[0], lights[i]->diffuseColor[1], lights[i]->diffuseColor[2]); |
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379 | PRINT(0)(" SpecularColor: %f/%f/%f\n", lights[i]->specularColor[0], lights[i]->specularColor[1], lights[i]->specularColor[2]); |
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380 | PRINT(0)(" Attenuation: "); |
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381 | switch (lights[i]->attenuationType) |
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382 | { |
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383 | case CONSTANT: |
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384 | PRINT(0)("constant"); |
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385 | case LINEAR: |
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386 | PRINT(0)("linear"); |
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387 | break; |
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388 | case QUADRATIC: |
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389 | PRINT(0)("quadratic"); |
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390 | break; |
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391 | } |
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392 | PRINT(0)(" with Factor %f\n", lights[i]->attenuationFactor); |
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393 | } |
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394 | PRINT(0)("--------------------------------\n"); |
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395 | } |
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