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eleni@0
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1 #include <GL/glew.h>
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eleni@0
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2 #include <GL/glut.h>
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3 #include <GL/glui.h>
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4
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5 #include <math.h>
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eleni@0
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6 #include <stdio.h>
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eleni@0
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7 #include <assert.h>
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8
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9 #include <vector>
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10
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11 #include "mesh.h"
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12 #include "volume.h"
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13
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14 static bool init(void);
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15 static GLUI *create_ui(void);
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16 static void display(void);
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17 static void reshape(int x, int y);
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18 static void keyboard(unsigned char key, int x, int y);
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19 static void keyboard_up(unsigned char key, int x, int y);
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20 static void mouse(int button, int state, int x, int y);
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21 static void motion(int x, int y);
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22 static bool init_xfer(void);
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23 static void display_xfer(void);
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24 static void reshape_xfer(int x, int y);
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25 static void mouse_xfer(int button, int state, int x, int y);
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26 static void motion_xfer(int x, int y);
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27 static void volume_preview ();
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28
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29 static int mainwin_id, xferwin_id;
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30 //todo keyb esc
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31
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32 static int win_xsz, win_ysz;
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33 static float cam_phi, cam_theta, cam_dist = 6;
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34 static std::vector<bool> key_state(256);
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35
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36 static const char *vol_fname = "data/test1.vol";
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37
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38 static Volume *vol;
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39 static Mesh *mesh;
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40 static float cur_z, thres = 0.5, thres2 = 1.0;
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41 static float zeta;
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42
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43 static int use_orig_vol_res = 1;
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44 static int vol_res[3]; // volume sampling resolution x/y/z
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45
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46 static GLUI *ui;
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47
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48 int main(int argc, char **argv)
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49 {
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50 glutInit(&argc, argv);
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51 if(argv[1])
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52 vol_fname = argv[1];
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53
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54 if(!init()) {
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55 fprintf(stderr, "Failed to initialize program.\n");
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56 return 1;
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57 }
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58
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59 init_xfer();
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60
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61 glutMainLoop();
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62 return 0;
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63 }
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64
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65 static bool init()
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66 {
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67 glutInitWindowSize(512, 512);
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68 glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
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69
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70 mainwin_id = glutCreateWindow("CT scan");
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71 glutDisplayFunc(display);
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72 glutReshapeFunc(reshape);
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73 glutKeyboardFunc(keyboard);
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74 glutKeyboardUpFunc(keyboard_up);
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75 glutMouseFunc(mouse);
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76 glutMotionFunc(motion);
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77
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78 glewInit();
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79
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80 glEnable(GL_DEPTH_TEST);
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81 glEnable(GL_NORMALIZE);
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82
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83 glEnable(GL_LIGHTING); //TODO: shaders
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84 glEnable(GL_LIGHT0);
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85 glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, 1);
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86
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87 vol = new Volume;
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88 if(!vol->load(vol_fname)) {
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89 fprintf(stderr, "Failed to load %s", vol_fname);
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90 return false;
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91 }
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92 mesh = new Mesh;
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93 cur_z = 0.5;
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94
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95 vol_res[0] = vol->get_slice(0)->get_width();
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96 vol_res[1] = vol->get_slice(0)->get_height();
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97 vol_res[2] = vol->get_slice_count();
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98
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99 if(!(ui = create_ui())) {
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100 return false;
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101 }
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102
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103 return true;
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104 }
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105
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106 static GLUI_Spinner *res_spin[3];
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107 static void toggle_use_orig(int id)
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108 {
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109 for(int i=0; i<3; i++) {
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110 if(use_orig_vol_res) {
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111 res_spin[i]->disable();
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112 } else {
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113 res_spin[i]->enable();
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114 }
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115 }
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116 }
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117 static void thres_change(int id)
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118 {
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119 static float prev_thres = thres;
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120 static float prev_thres2 = thres2;
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121
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122 if(prev_thres != thres || prev_thres2 != thres2) {
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123 prev_thres = thres;
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124 prev_thres2 = thres2;
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125 mesh->clear();
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126 }
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127
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128 glutSetWindow(xferwin_id);
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129 glutPostRedisplay();
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130 glutSetWindow(mainwin_id);
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131 glutPostRedisplay();
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132 }
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133 static void res_change(int id)
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134 {
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135 static float prev_resx = vol_res[0];
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136 static float prev_resy = vol_res[1];
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137 static float prev_resz = vol_res[2];
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138
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139 if(prev_resx != vol_res[0] || prev_resy != vol_res[1] || prev_resz != vol_res[2]) {
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140 prev_resx = vol_res[0];
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141 prev_resy = vol_res[1];
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142 prev_resz = vol_res[2];
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143 mesh->clear();
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144 }
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145 }
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146 static GLUI *create_ui()
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147 {
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148 GLUI *ui = GLUI_Master.create_glui("ui");
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149 assert(ui);
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150
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151 ui->set_main_gfx_window(glutGetWindow());
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152
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153 GLUI_Panel *thres_panel = ui->add_panel("iso thresholds");
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154
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155 GLUI_Spinner *thres_spin = ui->add_spinner_to_panel(thres_panel, "T1", GLUI_SPINNER_FLOAT, &thres, 0, thres_change);
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156 thres_spin->set_float_limits(0, 1);
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157
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158 GLUI_Spinner *thres2_spin = ui->add_spinner_to_panel(thres_panel, "T2", GLUI_SPINNER_FLOAT, &thres2, 0, thres_change);
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159 thres2_spin->set_float_limits(0, 1);
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160
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161 GLUI_Panel *res_panel = ui->add_panel("volume resolution");
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162
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163 ui->add_checkbox_to_panel(res_panel, "original resolution", &use_orig_vol_res, 0, toggle_use_orig);
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164
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165 static const char *res_spin_name[] = {"x", "y", "z"};
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166 for(int i=0; i<3; i++) {
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167 res_spin[i] = ui->add_spinner_to_panel(res_panel, res_spin_name[i], GLUI_SPINNER_INT, vol_res + i, 0, res_change);
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168 res_spin[i]->set_int_limits(8, 256); // TODO limits as arguments or config
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169 res_spin[i]->disable();
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170 }
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171
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172 GLUI_Panel *preview_panel = ui->add_panel("volume preview");
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173
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174 GLUI_Spinner *preview_spin = ui->add_spinner_to_panel(preview_panel, "slice z", GLUI_SPINNER_FLOAT, &zeta, 0);
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175 preview_spin->set_float_limits(0, 1);
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176
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177 return ui;
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178 }
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179
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180 static void volume_preview ()
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181 {
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182 float aspect = win_xsz / win_ysz;
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183
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184 glDisable(GL_LIGHTING);
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185 glDisable(GL_DEPTH_TEST);
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186
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187 glMatrixMode(GL_MODELVIEW);
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188 glPushMatrix();
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189 glLoadIdentity();
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190
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191 glMatrixMode(GL_PROJECTION);
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192 glPushMatrix();
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193 glLoadIdentity();
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194 glOrtho(-aspect, aspect, -1.0, 1.0, -1.0, 1.0);
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195
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196 glBindTexture(GL_TEXTURE_3D, vol->get_texture());
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197 glEnable(GL_TEXTURE_3D);
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198 glBegin(GL_QUADS);
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199 glColor3f(1.0, 1.0, 1.0);
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200 glTexCoord3f(0, 0, zeta); glVertex3f(-1.0, 1.0, 0.0);
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201 glTexCoord3f(0, 1, zeta); glVertex3f(-1.0, 0.5, 0.0);
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202 glTexCoord3f(1, 1, zeta); glVertex3f(-0.5, 0.5, 0.0);
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203 glTexCoord3f(1, 0, zeta); glVertex3f(-0.5, 1.0, 0.0);
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204 glEnd();
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205 glDisable(GL_TEXTURE_3D);
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206
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207 glLineWidth(3);
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208 glBegin(GL_LINE_LOOP);
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209 glColor3f(0.4, 0.8, 0.4);
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210 glVertex3f(-1.0, 1.0, 0.0);
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211 glVertex3f(-1.0, 0.5, 0.0);
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212 glVertex3f(-0.5, 0.5, 0.0);
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213 glVertex3f(-0.5, 1.0, 0.0);
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214 glEnd();
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215
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216 glMatrixMode(GL_PROJECTION);
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217 glPopMatrix();
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218
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219 glMatrixMode(GL_MODELVIEW);
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220 glPopMatrix();
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221
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222 glEnable(GL_DEPTH_TEST);
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223 glEnable(GL_LIGHTING);
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224 }
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225
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226 static void display(void)
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227 {
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228 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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229
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230 glMatrixMode(GL_MODELVIEW);
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231 glLoadIdentity();
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232 glTranslatef(0, 0, -cam_dist);
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233 glRotatef(cam_phi, 1, 0, 0);
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234 glRotatef(cam_theta, 0, 1, 0);
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235
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236 /*
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237 glBindTexture(GL_TEXTURE_3D, vol->get_texture());
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238 glEnable(GL_TEXTURE_3D);
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239 glBegin(GL_QUADS);
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240 glTexCoord3f(0, 0, cur_z); glVertex3f(-1, -1, 0);
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241 glTexCoord3f(0, 1, cur_z); glVertex3f(-1, 1, 0);
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242 glTexCoord3f(1, 1, cur_z); glVertex3f(1, 1, 0);
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243 glTexCoord3f(1, 0, cur_z); glVertex3f(1, -1, 0);
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244 glEnd();
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245 glDisable(GL_TEXTURE_3D);
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246 */
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247
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248 if(mesh->is_empty()) {
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249 printf("recalculating isosurface ... ");
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250 fflush(stdout);
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251 vol->create_mesh(mesh, thres, thres2, vol_res[0], vol_res[1], vol_res[2]);
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252 printf("done.\n");
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253 }
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254 mesh->draw();
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255
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256 volume_preview();
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257 glutSwapBuffers();
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258 assert(glGetError() == GL_NO_ERROR);
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259 }
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260
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261 static void reshape(int x, int y)
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262 {
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263 glViewport(0, 0, x, y);
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264 glMatrixMode(GL_PROJECTION);
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265 glLoadIdentity();
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266 gluPerspective(45, (float)x / (float)y, 0.5, 500);
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267
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268 if(x != win_xsz || y != win_ysz) {
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269 win_xsz = x;
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270 win_ysz = y;
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271 }
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272 }
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273
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274 static void keyboard(unsigned char key, int x, int y)
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275 {
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276 key_state[(int)key] = true;
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277
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278 switch(key) {
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279 case 27:
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280 exit(0);
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281 case 'w':
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282 {
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283 static bool wire;
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284 wire = !wire;
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285 glPolygonMode(GL_FRONT_AND_BACK, wire ? GL_LINE : GL_FILL);
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286 }
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287 break;
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288 default:
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289 break;
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290 }
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291 }
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292
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293 static void keyboard_up(unsigned char key, int x, int y)
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294 {
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295 key_state[(int) key] = false;
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296 }
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297
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298 static int prev_x, prev_y;
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299 static bool bn_state[32];
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300 static float prev_thres, prev_thres2;
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301
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302 static void mouse(int bn, int state, int x, int y)
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303 {
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304 prev_x = x;
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305 prev_y = y;
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306
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307 bn_state[bn - GLUT_LEFT_BUTTON] = (state == GLUT_DOWN);
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308
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309 if(state == GLUT_DOWN) {
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310 prev_thres = thres;
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311 prev_thres2 = thres2;
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312 }
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313 else {
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314 if(thres != prev_thres || thres2 != prev_thres2) {
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315 mesh->clear();
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316 }
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317 }
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318 }
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319
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320 static void motion(int x, int y)
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321 {
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322 int dx = x - prev_x;
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323 int dy = y - prev_y;
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324
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325 if(!dx && !dy)
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326 return;
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327
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328 prev_x = x;
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329 prev_y = y;
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330
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331 if(key_state[(int)'t']) {
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332 thres = (float)x / (float)win_xsz;
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333 printf("threshold: %f\n", thres);
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334
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335 glutPostRedisplay();
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336 return;
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337 }
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338
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339 // camera
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340 if(bn_state[0]) {
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341 if(key_state[(int)'z']) {
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elene@9
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342 //zoom the camera
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343
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344 cam_dist += dy * 0.1;
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345
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346 if(cam_dist < 0)
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347 cam_dist = 0;
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elene@9
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348 }
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349 else {
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elene@9
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350 //rotate the camera
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351
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352 cam_phi += dy * 0.5;
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353 cam_theta += dx * 0.5;
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354
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355 if(cam_phi > 90)
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356 cam_phi = 90;
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357 if(cam_phi < -90)
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358 cam_phi = -90;
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elene@9
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359 }
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elene@9
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360
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elene@6
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361 glutPostRedisplay();
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elene@6
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362 }
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eleni@0
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363 }
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elene@16
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364
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elene@16
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365 static bool init_xfer(void)
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366 {
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elene@16
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367 glutSetWindow(mainwin_id);
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elene@16
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368 int x = glutGet(GLUT_WINDOW_X);
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elene@16
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369 int y = glutGet(GLUT_WINDOW_Y) + glutGet(GLUT_WINDOW_HEIGHT);
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elene@16
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370
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elene@16
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371 glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
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elene@16
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372 glutInitWindowSize(512, 100);
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elene@16
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373 glutInitWindowPosition(x, y);
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elene@16
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374
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elene@16
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375 xferwin_id = glutCreateWindow("Transfer Function");
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elene@16
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376 glutDisplayFunc(display_xfer);
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elene@16
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377 glutReshapeFunc(reshape_xfer);
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elene@17
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378 glutMouseFunc(mouse_xfer);
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elene@16
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379 glutMotionFunc(motion_xfer);
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elene@16
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380
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elene@16
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381 return true;
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elene@16
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382 }
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elene@16
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383
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elene@16
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384 static void display_xfer(void)
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elene@16
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385 {
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elene@16
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386 glClear(GL_COLOR_BUFFER_BIT);
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elene@16
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387
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elene@16
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388 int num_val = glutGet(GLUT_WINDOW_WIDTH) / 4.0;
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elene@16
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389 float x = 0;
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elene@16
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390 float dx = 1.0 / num_val;
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elene@16
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391 float low, high;
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elene@16
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392 if(thres < thres2) {
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elene@16
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393 low = thres;
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elene@16
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394 high = thres2;
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elene@16
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395 }
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elene@16
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396 else {
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elene@16
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397 low = thres2;
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elene@16
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398 high = thres;
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elene@16
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399 }
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elene@16
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400
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elene@17
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401 //drawing the transfer function curve
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elene@17
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402
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elene@17
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403 glLineWidth(3);
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elene@17
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404 glBegin(GL_LINE_STRIP);
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elene@17
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405 glColor3f(0.8, 0.3, 0.8);
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elene@17
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406 for(int i=0; i<num_val; i++) {
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elene@17
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407 float val = transfer_function(x, low, high);
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elene@17
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408 glVertex2f(x, val);
|
elene@17
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409 x += dx;
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elene@17
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410 }
|
elene@17
|
411 glEnd();
|
elene@17
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412
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elene@17
|
413 //threshold bars
|
elene@17
|
414
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elene@17
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415 glLineWidth(2);
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elene@17
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416 glBegin(GL_LINES);
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elene@17
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417 glColor3f(0.4, 0.4, 0.8);
|
elene@17
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418 glVertex2f(low, 0);
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elene@17
|
419 glVertex2f(low, 1);
|
elene@17
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420 glColor3f(0.4, 0.8, 0.4);
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elene@17
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421 glVertex2f(high, 0);
|
elene@17
|
422 glVertex2f(high, 1);
|
elene@17
|
423 glEnd();
|
elene@17
|
424
|
elene@17
|
425 /*
|
elene@17
|
426 * gradient
|
elene@17
|
427 */
|
elene@17
|
428 /* glBegin(GL_QUADS);
|
elene@16
|
429 for(int i=0; i<num_val; i++) {
|
elene@16
|
430 float val = transfer_function(x, low, high);
|
elene@16
|
431 glColor3f(val, val, val);
|
elene@16
|
432 glVertex3f(x, 1.0, 0.0);
|
elene@16
|
433 glVertex3f(x, 0.0, 0.0);
|
elene@16
|
434
|
elene@16
|
435 val = transfer_function(x + dx, low, high);
|
elene@16
|
436 glColor3f(val, val, val);
|
elene@16
|
437 glVertex3f(x + dx, 0.0, 0.0);
|
elene@16
|
438 glVertex3f(x + dx, 1.0, 0.0);
|
elene@16
|
439 x += dx;
|
elene@16
|
440 }
|
elene@17
|
441 glEnd(); */
|
elene@16
|
442
|
elene@16
|
443 glutSwapBuffers();
|
elene@16
|
444 assert(glGetError() == GL_NO_ERROR);
|
elene@16
|
445 }
|
elene@16
|
446
|
elene@16
|
447 static void reshape_xfer(int x, int y)
|
elene@16
|
448 {
|
elene@16
|
449 glViewport(0.0, 0.0, x, y);
|
elene@16
|
450 glMatrixMode(GL_PROJECTION);
|
elene@16
|
451 glLoadIdentity();
|
elene@16
|
452 glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
|
elene@16
|
453 }
|
elene@16
|
454
|
elene@17
|
455 static float *select_thres;
|
elene@17
|
456 static float prev_select_thres;
|
elene@17
|
457 static void mouse_xfer(int button, int state, int x, int y)
|
elene@17
|
458 {
|
elene@17
|
459 if(button == GLUT_LEFT_BUTTON) {
|
elene@17
|
460 if(state == GLUT_DOWN) {
|
elene@17
|
461 int width = glutGet(GLUT_WINDOW_WIDTH);
|
elene@17
|
462 float xpos = (float)x / (float)width;
|
elene@17
|
463 if(fabs(xpos - thres) <= fabs(xpos - thres2)) {
|
elene@17
|
464 select_thres = &thres;
|
elene@17
|
465 }
|
elene@17
|
466 else {
|
elene@17
|
467 select_thres = &thres2;
|
elene@17
|
468 }
|
elene@17
|
469 prev_select_thres = *select_thres;
|
elene@17
|
470 }
|
elene@17
|
471 else {
|
elene@17
|
472 if(fabs(*select_thres - prev_select_thres) > 0.001) {
|
elene@17
|
473 mesh->clear();
|
elene@17
|
474 ui->sync_live();
|
elene@17
|
475 }
|
elene@17
|
476 select_thres = 0;
|
elene@17
|
477 }
|
elene@17
|
478 }
|
elene@17
|
479 }
|
elene@17
|
480
|
elene@16
|
481 static void motion_xfer(int x, int y)
|
elene@16
|
482 {
|
elene@17
|
483 if(!select_thres)
|
elene@17
|
484 return;
|
elene@17
|
485
|
elene@17
|
486 int width = glutGet(GLUT_WINDOW_WIDTH);
|
elene@17
|
487 float xpos = (float)x / (float)width;
|
elene@17
|
488
|
elene@17
|
489 *select_thres = xpos;
|
elene@17
|
490
|
elene@17
|
491 glutPostRedisplay();
|
elene@17
|
492 glutSetWindow(mainwin_id);
|
elene@17
|
493 glutPostRedisplay();
|
elene@16
|
494 }
|