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nuclear@0
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1 #include <stdio.h>
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2 #include <stdlib.h>
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3 #include <string.h>
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4 #include <assert.h>
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5 #include "opengl.h"
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6 #include "vr.h"
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7 #include "camera.h"
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8
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9 static bool init();
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10 static void cleanup();
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11 static void disp();
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12 static void draw_scene();
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13 static void idle();
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14 static void reshape(int x, int y);
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15 static void keyb(unsigned char key, int x, int y);
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16 static void keyup(unsigned char key, int x, int y);
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17 static void mouse(int bn, int st, int x, int y);
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18 static void motion(int x, int y);
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19 static void passive(int x, int y);
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20 static void sball_rotate(int rx, int ry, int rz);
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21 static bool parse_args(int argc, char **argv);
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22
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23 static VRFpsCamera cam;
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24 static int width, height;
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25 static bool use_vr = false;
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26 static bool mouselook = false;
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27
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28 static bool keystate[256];
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29
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30
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31 int main(int argc, char **argv)
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32 {
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33 glutInitWindowSize(1280, 800);
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34 glutInit(&argc, argv);
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35
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36 if(!parse_args(argc, argv)) {
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37 return 1;
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38 }
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39
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40 glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE | GLUT_MULTISAMPLE);
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41 glutCreateWindow("oculus test 01");
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42
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43 glutDisplayFunc(disp);
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44 glutIdleFunc(idle);
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45 glutReshapeFunc(reshape);
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46 glutKeyboardFunc(keyb);
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47 glutKeyboardUpFunc(keyup);
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48 glutMouseFunc(mouse);
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49 glutMotionFunc(motion);
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50 glutSpaceballRotateFunc(sball_rotate);
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51
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52 if(!init()) {
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53 return 1;
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54 }
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55 atexit(cleanup);
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56
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57 glutMainLoop();
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58 return 0;
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59 }
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60
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61 static bool init()
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62 {
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63 glewInit(); // this must be first
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64
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65 if(GLEW_ARB_multisample) {
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66 glEnable(GL_MULTISAMPLE);
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67 }
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68
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69 glEnable(GL_DEPTH_TEST);
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70 glEnable(GL_LIGHTING);
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71 glEnable(GL_CULL_FACE);
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72
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73 glEnable(GL_LIGHT0);
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74 glEnable(GL_LIGHTING);
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75
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76 cam.input_move(0, 1.75, 0);
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77
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78 if(vr_init(VR_INIT_OCULUS) == -1) {
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79 return false;
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80 }
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81 return true;
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82 }
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83
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84 static void cleanup()
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85 {
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86 vr_shutdown();
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87 }
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88
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89 static void disp()
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90 {
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91 unsigned int msec = glutGet(GLUT_ELAPSED_TIME);
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92
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93 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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94
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95 glMatrixMode(GL_PROJECTION);
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96 glLoadIdentity();
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97 gluPerspective(45.0, (float)width / (float)height, 0.5, 500.0);
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98
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99 glMatrixMode(GL_MODELVIEW);
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100 glLoadIdentity();
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101
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102 cam.track_vr();
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103 cam.use_inverse();
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104
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105 draw_scene();
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106
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107 glutSwapBuffers();
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108 assert(glGetError() == GL_NO_ERROR);
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109 }
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110
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111 static void draw_teapot()
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112 {
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113 static int tealist;
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114
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115 if(!tealist) {
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116 tealist = glGenLists(1);
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117 glNewList(tealist, GL_COMPILE);
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118 glutSolidTeapot(1.0);
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119 glEndList();
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120 }
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121
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122 glFrontFace(GL_CW);
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123 glCallList(tealist);
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124 glFrontFace(GL_CCW);
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125 }
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126
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127 void draw_grid(float size, float spacing)
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128 {
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129 int num_lines = size / spacing;
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130 float dist = size / 2.0;
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131
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132 glPushAttrib(GL_ENABLE_BIT | GL_LINE_BIT);
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133 glDisable(GL_LIGHTING);
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134
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135 glLineWidth(1.0);
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136
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137 glBegin(GL_LINES);
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138 glColor3f(0.4, 0.4, 0.4);
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139
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140 float x = -dist;
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141 for(int i=0; i<=num_lines; i++) {
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142 if(i != num_lines / 2) {
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143 glVertex3f(-dist, 0, x);
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144 glVertex3f(dist, 0, x);
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145 glVertex3f(x, 0, -dist);
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146 glVertex3f(x, 0, dist);
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147 }
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148 x += spacing;
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149 }
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150 glEnd();
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151
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152 glLineWidth(2.0);
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153
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154 glBegin(GL_LINES);
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155 glColor3f(1.0, 0, 0);
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156 glVertex3f(-dist, 0, 0);
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157 glVertex3f(dist, 0, 0);
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158 glColor3f(0, 1.0, 0);
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159 glVertex3f(0, 0, -dist);
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160 glVertex3f(0, 0, dist);
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161 glEnd();
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162
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163 glPopAttrib();
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164 }
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165
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166
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167 static void draw_scene()
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168 {
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169 float lpos[] = {0, 60, 0, 1};
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170 glLightfv(GL_LIGHT0, GL_POSITION, lpos);
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171
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172 static Vector2 teapos[] = {
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173 Vector2(-8, 8), Vector2(8, 8), Vector2(8, -8), Vector2(-8, -8)
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174 };
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175
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176 for(int i=0; i<4; i++) {
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177 glPushMatrix();
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178 glTranslatef(teapos[i].x, 0, teapos[i].y);
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179 draw_teapot();
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180 glPopMatrix();
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181 }
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182
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183 draw_grid(100.0, 2.5);
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184 }
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185
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186 static void idle()
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187 {
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188 glutPostRedisplay();
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189 }
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190
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191
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192 static void reshape(int x, int y)
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193 {
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194 width = x;
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195 height = y;
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196 }
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197
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198 static void keyb(unsigned char key, int x, int y)
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199 {
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200 switch(key) {
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201 case 27:
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202 exit(0);
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203
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204 case 'm':
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205 mouselook = !mouselook;
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206 if(mouselook) {
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207 glutPassiveMotionFunc(passive);
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208 glutSetCursor(GLUT_CURSOR_NONE);
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209 glutWarpPointer(width / 2, height / 2);
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210 } else {
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211 glutPassiveMotionFunc(0);
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212 glutSetCursor(GLUT_CURSOR_INHERIT);
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213 }
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214 break;
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215 }
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216
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217 keystate[key] = true;
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218 glutPostRedisplay();
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219 }
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220
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221 static void keyup(unsigned char key, int x, int y)
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222 {
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223 keystate[key] = false;
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224 glutPostRedisplay();
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225 }
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226
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227 static bool bnstate[32];
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228 static int prev_x, prev_y;
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229
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230 static void mouse(int bn, int st, int x, int y)
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231 {
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232 prev_x = x;
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233 prev_y = y;
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234 bnstate[bn - GLUT_LEFT_BUTTON] = st == GLUT_DOWN;
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235 }
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236
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237 static void motion(int x, int y)
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238 {
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239 if(mouselook) {
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240 // just call passive, it does what we need
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241 passive(x, y);
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242 }
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243 }
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244
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245 static void passive(int x, int y)
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246 {
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247 // no need to test mouselook; this callback is only set when mouselook is enabled
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248 int center_x = width / 2;
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249 int center_y = height / 2;
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250
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251 int dx = x - center_x;
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252 int dy = y - center_y;
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253
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254 if(!dx && !dy) {
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255 return;
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256 }
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257
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258 float dtheta_deg = dy * 0.1;
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259 float dphi_deg = dx * 0.1;
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260
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261 cam.input_rotate(DEG_TO_RAD(dtheta_deg), DEG_TO_RAD(dphi_deg), 0);
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262
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263 glutPostRedisplay();
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264 glutWarpPointer(center_x, center_y);
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265 }
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266
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267 static void sball_rotate(int rx, int ry, int rz)
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268 {
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269 }
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270
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271 static bool parse_args(int argc, char **argv)
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272 {
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273 for(int i=1; i<argc; i++) {
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274 if(argv[i][0] == '-') {
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275 if(strcmp(argv[i], "-vr") == 0) {
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276 use_vr = true;
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277 } else if(strcmp(argv[i], "-novr") == 0) {
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278 use_vr = false;
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279 } else {
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280 fprintf(stderr, "invalid option: %s\n", argv[i]);
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281 return false;
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282 }
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283 } else {
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284 fprintf(stderr, "unexpected argument: %s\n", argv[i]);
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285 return false;
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286 }
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287 }
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288 return true;
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289 }
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