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1 #include <stdio.h>
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2
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3 #ifndef __APPLE__
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4 #include <GL/glut.h>
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5 #else
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6 #include <GLUT/glut.h>
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7 #endif
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8
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9 #include <ubertk.h>
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10 #include "gui.h"
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11 #include "utktext.h"
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12 #include "sdr.h"
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13 #include "vmath.h"
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14
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15 #ifndef GL_BGRA
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16 #define GL_BGRA 0x80E1
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17 #endif
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18
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19 #define TEXT_PT_SIZE 18
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20
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21 void huecb(utk::Event *ev, void *cls);
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22 static void cbfunc(utk::Event *ev, void *cls);
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23
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24 void utk_color(int r, int g, int b, int a);
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25 void utk_clip(int x1, int y1, int x2, int y2);
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26 void utk_image(int x, int y, const void *pix, int xsz, int ysz);
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27
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28 void utk_rect(int x1, int y1, int x2, int y2);
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29 void utk_line(int x1, int y1, int x2, int y2, int width);
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30
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31 void utk_text(int x, int y, const char *txt, int sz);
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32 int utk_text_spacing();
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33 int utk_text_width(const char *txt, int sz);
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34
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35
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36 int xsz, ysz;
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37 static utk::Container *utkroot;
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38 static float max_descent;
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39 utk::Window *win_seed, *win_material;
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40
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41
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42 extern unsigned int sdr;
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43 extern Vector4 seed;
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44 extern int iter;
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45 extern float err_thres;
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46 extern float reflectivity;
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47 extern Vector3 color;
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48
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49 int gui_init(int width, int height)
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50 {
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51 xsz = width;
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52 ysz = height;
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53
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54 if(!CreateFont("georgia.ttf", TEXT_PT_SIZE)) {
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55 fprintf(stderr, "failed to load font\n");
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56 return -1;
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57 }
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58 max_descent = GetMaxDescent();
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59
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60 utk::gfx::color = utk_color;
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61 utk::gfx::clip = utk_clip;
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62 utk::gfx::image = utk_image;
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63 utk::gfx::rect = utk_rect;
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64 utk::gfx::line = utk_line;
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65 utk::gfx::text = utk_text;
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66 utk::gfx::text_spacing = utk_text_spacing;
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67 utk::gfx::text_width = utk_text_width;
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68
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69 utkroot = utk::init(xsz, ysz);
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70
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71 win_seed = utk::create_window(utkroot, 5, 25, 220, 175, "julia parameters");
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72 win_seed->set_alpha(128);
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73 win_seed->show();
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74
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75 utk::VBox *vbox = utk::create_vbox(win_seed);
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76 utk::HBox *hbox;
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77
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78 hbox = utk::create_hbox(vbox);
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79 utk::create_label(hbox, "seed x");
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80 utk::create_slider(hbox, -1.0, 1.0, cbfunc, (void*)0)->set_value(seed.x);
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81 hbox = utk::create_hbox(vbox);
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82 utk::create_label(hbox, "seed y");
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83 utk::create_slider(hbox, -1.0, 1.0, cbfunc, (void*)1)->set_value(seed.y);
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84 hbox = utk::create_hbox(vbox);
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85 utk::create_label(hbox, "seed z");
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86 utk::create_slider(hbox, -1.0, 1.0, cbfunc, (void*)2)->set_value(seed.z);
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87 hbox = utk::create_hbox(vbox);
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88 utk::create_label(hbox, "seed w");
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89 utk::create_slider(hbox, -1.0, 1.0, cbfunc, (void*)3)->set_value(seed.w);
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90
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91 hbox = utk::create_hbox(vbox);
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92 utk::create_label(hbox, "iterations");
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93 utk::Slider *iter_slider = utk::create_slider(hbox, 0, 32, cbfunc, (void*)5);
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94 iter_slider->set_value(iter);
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95 iter_slider->set_vis_decimal(0);
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96
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97 hbox = utk::create_hbox(vbox);
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98 utk::create_label(hbox, "max error");
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99 utk::Slider *err_slider = utk::create_slider(hbox, 0, 0.075, cbfunc, (void*)6);
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100 err_slider->set_value(err_thres);
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101 err_slider->set_vis_decimal(4);
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102
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103 win_material = utk::create_window(utkroot, 250, 25, 220, 210, "material");
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104 win_material->set_alpha(128);
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105 win_material->show();
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106 ((utk::WinFrame*)win_material->get_parent())->set_shade(true);
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107
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108 vbox = utk::create_vbox(win_material);
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109
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110 utk::ColorBox *colbox = new utk::ColorBox;
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111 vbox->add_child(colbox);
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112 utk::HueBox *huebox = new utk::HueBox;
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113 vbox->add_child(huebox);
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114 huebox->set_callback(utk::EVENT_MODIFY, huecb, colbox);
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115
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116 float hue, sat, val;
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117 utk::rgb_to_hsv(color.x, color.y, color.z, &hue, &sat, &val);
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118 colbox->set_color_hsv(hue, sat, val);
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119 huebox->set_h(hue);
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120
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121 hbox = utk::create_hbox(vbox);
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122 utk::create_label(hbox, "reflectivity");
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123 utk::create_slider(hbox, 0, 1.0, cbfunc, (void*)4)->set_value(reflectivity);
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124
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125 return 0;
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126 }
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127
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128 void gui_draw()
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129 {
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130 glMatrixMode(GL_MODELVIEW);
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131 glPushMatrix();
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132 glLoadIdentity();
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133 glMatrixMode(GL_PROJECTION);
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134 glPushMatrix();
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135 glLoadIdentity();
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136
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137 glPushAttrib(GL_ENABLE_BIT);
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138 glDisable(GL_LIGHTING);
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139 glDisable(GL_DEPTH_TEST);
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140 glDisable(GL_CULL_FACE);
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141 glEnable(GL_BLEND);
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142
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143 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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144
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145 utk::draw();
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146
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147 glPopAttrib();
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148
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149 glMatrixMode(GL_PROJECTION);
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150 glPopMatrix();
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151 glMatrixMode(GL_MODELVIEW);
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152 glPopMatrix();
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153 }
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154
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155 void gui_set_visible(bool vis)
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156 {
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157 if(vis) {
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158 win_seed->show();
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159 win_material->show();
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160 } else {
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161 win_seed->hide();
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162 win_material->hide();
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163 }
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164 }
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165
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166 void huecb(utk::Event *ev, void *cls)
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167 {
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168 utk::HueBox *huebox = (utk::HueBox*)ev->widget;
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169 utk::ColorBox *colbox = (utk::ColorBox*)cls;
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170
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171 colbox->set_h(huebox->get_h());
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172 }
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173
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174 void cbfunc(utk::Event *ev, void *cls)
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175 {
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176 int id = (int)(intptr_t)cls;
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177
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178 switch(id) {
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179 case 0:
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180 case 1:
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181 case 2:
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182 case 3:
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183 {
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184 utk::Slider *slider = (utk::Slider*)ev->widget;
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185
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186 seed[id] = slider->get_value();
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187 set_uniform_float4(sdr, "seed", seed.x, seed.y, seed.z, seed.w);
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188 glutPostRedisplay();
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189 }
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190 break;
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191
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192 case 4:
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193 {
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194 utk::Slider *slider = (utk::Slider*)ev->widget;
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195
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196 reflectivity = slider->get_value();
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197 set_uniform_float(sdr, "reflectivity", reflectivity);
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198 glutPostRedisplay();
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199 }
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200 break;
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201
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202 case 5:
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203 {
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204 utk::Slider *slider = (utk::Slider*)ev->widget;
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205
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206 iter = (int)slider->get_value();
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207 set_uniform_int(sdr, "iter", iter);
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208 glutPostRedisplay();
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209 }
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210 break;
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211
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212 case 6:
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213 {
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214 utk::Slider *slider = (utk::Slider*)ev->widget;
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215
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216 err_thres = slider->get_value();
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217 set_uniform_float(sdr, "err_thres", err_thres);
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218 glutPostRedisplay();
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219 }
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220 break;
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221
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222 default:
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223 fprintf(stderr, "unhandled callback (id: %d)\n", id);
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224 break;
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225 }
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226 }
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227
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228
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229 #define CONVX(x) (2.0 * (float)(x) / (float)xsz - 1.0)
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230 #define CONVY(y) (1.0 - 2.0 * (float)(y) / (float)ysz)
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231
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232 void utk_color(int r, int g, int b, int a)
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233 {
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234 glColor4ub(r, g, b, a);
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235 SetTextColor(Color(r / 255.0, g / 255.0, b / 255.0, a / 255.0));
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236 }
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237
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238 void utk_clip(int x1, int y1, int x2, int y2)
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239 {
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240 if(x1 == x2 && y1 == y2 && x1 == y1 && x1 == 0) {
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241 glDisable(GL_SCISSOR_TEST);
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242 } else {
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243 glEnable(GL_SCISSOR_TEST);
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244 }
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245 glScissor(x1, ysz - y2, x2 - x1, y2 - y1);
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246 }
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247
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248 void utk_image(int x, int y, const void *pix, int w, int h)
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249 {
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250 glPixelZoom(1, -1);
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251 glRasterPos2f(CONVX(x), CONVY(y));
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252 glDrawPixels(w, h, GL_BGRA, GL_UNSIGNED_BYTE, pix);
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253 }
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254
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255 void utk_rect(int x1, int y1, int x2, int y2)
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256 {
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257 glRectf(CONVX(x1), CONVY(y1), CONVX(x2), CONVY(y2));
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258 }
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259
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260 void utk_line(int x1, int y1, int x2, int y2, int width)
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261 {
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262 glPushAttrib(GL_LINE_BIT);
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263
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264 glLineWidth((float)width);
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265 glBegin(GL_LINES);
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266 glVertex2f(CONVX(x1), CONVY(y1));
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267 glVertex2f(CONVX(x2), CONVY(y2));
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268 glEnd();
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269
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270 glPopAttrib();
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271 }
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272
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273 void utk_text(int x, int y, const char *txt, int sz)
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274 {
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275 float fx = (float)x / (float)xsz;
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276 float fy = (float)y / (float)ysz;
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277
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278 SetTextPos(Vector2(fx, fy - max_descent));
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279 //SetTextPos(Vector2(0.25, 0.25));
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280 SetTextSize((float)sz / (float)TEXT_PT_SIZE);
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281 PrintString(txt);
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282 }
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283
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284 int utk_text_spacing()
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285 {
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286 return (int)(GetLineAdvance() * (float)ysz);
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287 }
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288
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289 int utk_text_width(const char *txt, int sz)
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290 {
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291 float prev_sz = GetTextSize();
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292 SetTextSize((float)sz / (float)TEXT_PT_SIZE);
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293
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294 int width = (int)(GetTextWidth(txt) * (float)xsz);
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295
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296 SetTextSize(prev_sz);
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297 return width;
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298 }
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299
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