rev |
line source |
nuclear@0
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1 #include <stdio.h>
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nuclear@0
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2 #include <stdlib.h>
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nuclear@8
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3 #include <string.h>
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nuclear@3
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4 #include <math.h>
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nuclear@0
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5 #include <assert.h>
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nuclear@0
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6 #include <GL/glew.h>
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nuclear@0
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7 #include <GL/glut.h>
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nuclear@0
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8 #include "sdr.h"
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nuclear@1
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9 #include "gui.h"
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nuclear@3
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10 #include "vmath.h"
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nuclear@0
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11
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nuclear@6
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12 #define DEG_TO_RAD(x) (M_PI * (x) / 180.0)
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nuclear@6
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13
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nuclear@0
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14 void disp();
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nuclear@8
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15 void render();
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nuclear@0
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16 void reshape(int x, int y);
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nuclear@0
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17 void keyb(unsigned char key, int x, int y);
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nuclear@1
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18 void keyb_up(unsigned char key, int x, int y);
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nuclear@0
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19 void mouse(int bn, int state, int x, int y);
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nuclear@0
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20 void motion(int x, int y);
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nuclear@1
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21 void passive_motion(int x, int y);
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nuclear@6
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22 void sball_motion(int x, int y, int z);
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nuclear@6
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23 void sball_rot(int x, int y, int z);
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nuclear@6
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24 void sball_button(int bn, int state);
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nuclear@6
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25
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nuclear@0
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26
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nuclear@0
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27 int load_shader();
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nuclear@0
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28 unsigned int create_ray_texture(int xsz, int ysz, float vfov, Vector2 *tex_scale = 0);
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nuclear@0
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29 static Vector3 get_primary_ray_dir(int x, int y, int w, int h, float vfov_deg);
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nuclear@0
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30 static int round_pow2(int x);
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nuclear@0
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31
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nuclear@8
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32 int parse_opt(int argc, char **argv);
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nuclear@8
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33
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nuclear@8
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34
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nuclear@0
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35 float cam_theta = 0, cam_phi = 0, cam_dist = 4.0;
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nuclear@6
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36 float cam_x, cam_y, cam_z;
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nuclear@0
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37
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nuclear@0
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38 unsigned int sdr;
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nuclear@0
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39 unsigned int ray_tex;
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nuclear@0
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40 Vector2 tex_scale;
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nuclear@0
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41 Vector4 seed;
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nuclear@0
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42 float err_thres = 0.0075;
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nuclear@0
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43 int iter = 10;
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nuclear@1
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44 float reflectivity = 0.2;
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nuclear@5
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45 Vector3 color(0.75, 0.75, 0.75);
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nuclear@0
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46
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nuclear@8
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47 int use_stereo;
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nuclear@8
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48 float eye_sep = 0.5;
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nuclear@8
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49
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nuclear@0
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50 int main(int argc, char **argv)
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nuclear@0
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51 {
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nuclear@0
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52 int xsz, ysz;
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nuclear@0
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53
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nuclear@0
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54 seed = Vector4(0.4, 0.0, 0.0, -0.8);
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nuclear@0
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55
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nuclear@0
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56 glutInitWindowSize(640, 480);
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nuclear@0
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57 glutInit(&argc, argv);
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nuclear@8
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58
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nuclear@8
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59 if(parse_opt(argc, argv) == -1) {
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nuclear@8
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60 return 1;
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nuclear@8
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61 }
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nuclear@8
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62
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nuclear@8
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63 glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | (use_stereo ? GLUT_STEREO : 0));
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nuclear@0
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64 glutCreateWindow("Raytraced Fractals");
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nuclear@0
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65 xsz = glutGet(GLUT_WINDOW_WIDTH);
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nuclear@0
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66 ysz = glutGet(GLUT_WINDOW_HEIGHT);
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nuclear@0
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67
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nuclear@0
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68 glutDisplayFunc(disp);
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nuclear@0
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69 glutReshapeFunc(reshape);
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nuclear@0
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70 glutKeyboardFunc(keyb);
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nuclear@1
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71 glutKeyboardUpFunc(keyb_up);
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nuclear@0
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72 glutMouseFunc(mouse);
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nuclear@0
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73 glutMotionFunc(motion);
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nuclear@1
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74 glutPassiveMotionFunc(passive_motion);
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nuclear@6
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75 glutSpaceballMotionFunc(sball_motion);
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nuclear@6
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76 glutSpaceballRotateFunc(sball_rot);
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nuclear@6
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77 glutSpaceballButtonFunc(sball_button);
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nuclear@0
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78
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nuclear@0
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79 glewInit();
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nuclear@0
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80
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nuclear@8
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81 glEnable(GL_CULL_FACE);
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nuclear@8
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82
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nuclear@0
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83 if(load_shader() == -1) {
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nuclear@0
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84 return 1;
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nuclear@0
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85 }
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nuclear@0
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86
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nuclear@1
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87 if(gui_init(xsz, ysz) == -1) {
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nuclear@1
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88 return 1;
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nuclear@1
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89 }
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nuclear@1
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90
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nuclear@0
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91 glutMainLoop();
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nuclear@0
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92 return 0;
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nuclear@0
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93 }
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nuclear@0
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94
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nuclear@0
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95 int load_shader()
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nuclear@0
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96 {
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nuclear@0
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97 if(sdr) {
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nuclear@0
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98 free_program(sdr);
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nuclear@0
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99 }
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nuclear@0
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100
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nuclear@0
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101 if(!(sdr = create_program_load("sdr/sdr.v.glsl", "sdr/julia.p.glsl"))) {
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nuclear@0
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102 return -1;
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nuclear@0
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103 }
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nuclear@0
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104 set_uniform_float4(sdr, "seed", seed.x, seed.y, seed.z, seed.w);
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nuclear@0
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105 set_uniform_float(sdr, "err_thres", err_thres);
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nuclear@0
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106 set_uniform_int(sdr, "iter", iter);
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nuclear@1
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107 set_uniform_float(sdr, "reflectivity", reflectivity);
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nuclear@1
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108 set_uniform_float3(sdr, "diffuse_color", color.x, color.y, color.z);
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nuclear@1
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109
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nuclear@0
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110 return 0;
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nuclear@0
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111 }
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nuclear@0
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112
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nuclear@0
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113 void disp()
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nuclear@0
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114 {
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nuclear@0
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115 glMatrixMode(GL_MODELVIEW);
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nuclear@0
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116 glLoadIdentity();
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nuclear@6
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117 glTranslatef(cam_x, cam_y, -cam_z);
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nuclear@0
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118 glRotatef(cam_theta, 0, 1, 0);
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nuclear@0
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119 glRotatef(cam_phi, 1, 0, 0);
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nuclear@0
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120 glTranslatef(0, 0, -cam_dist);
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nuclear@0
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121
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nuclear@0
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122 float lpos[] = {-1, 1, 3, 0};
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nuclear@0
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123 glLightfv(GL_LIGHT0, GL_POSITION, lpos);
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nuclear@0
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124
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nuclear@0
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125
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nuclear@4
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126 set_uniform_float4(sdr, "seed", seed.x, seed.y, seed.z, seed.w);
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nuclear@4
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127 set_uniform_float(sdr, "reflectivity", reflectivity);
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nuclear@4
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128 set_uniform_int(sdr, "iter", iter);
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nuclear@4
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129 set_uniform_float(sdr, "err_thres", err_thres);
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nuclear@5
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130 set_uniform_float3(sdr, "diffuse_color", color.x, color.y, color.z);
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nuclear@4
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131
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nuclear@8
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132 glBindTexture(GL_TEXTURE_2D, ray_tex);
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nuclear@8
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133
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nuclear@8
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134
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nuclear@8
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135 if(use_stereo) {
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nuclear@8
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136 glDrawBuffer(GL_BACK_LEFT);
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nuclear@8
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137 set_uniform_float(sdr, "eye_offs", -eye_sep / 2.0);
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nuclear@8
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138 } else {
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nuclear@8
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139 set_uniform_float(sdr, "eye_offs", 0);
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nuclear@8
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140 }
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nuclear@8
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141
|
nuclear@8
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142 render();
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nuclear@8
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143
|
nuclear@8
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144 if(use_stereo) {
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nuclear@8
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145 glDrawBuffer(GL_BACK_RIGHT);
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nuclear@8
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146
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nuclear@8
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147 set_uniform_float(sdr, "eye_offs", eye_sep / 2.0);
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nuclear@8
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148 render();
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nuclear@8
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149 }
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nuclear@8
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150
|
nuclear@8
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151 glutSwapBuffers();
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nuclear@8
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152 assert(glGetError() == GL_NO_ERROR);
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nuclear@8
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153 }
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nuclear@8
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154
|
nuclear@8
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155 void render()
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nuclear@8
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156 {
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nuclear@0
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157 glMatrixMode(GL_TEXTURE);
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nuclear@0
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158 glPushMatrix();
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nuclear@0
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159 glScalef(tex_scale.x, tex_scale.y, 1.0);
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nuclear@0
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160
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nuclear@0
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161 glEnable(GL_TEXTURE_2D);
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nuclear@0
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162 bind_program(sdr);
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nuclear@0
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163
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nuclear@0
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164 glBegin(GL_QUADS);
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nuclear@0
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165 glColor3f(1, 1, 1);
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nuclear@0
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166 glTexCoord2f(0, 1); glVertex2f(-1, -1);
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nuclear@0
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167 glTexCoord2f(1, 1); glVertex2f(1, -1);
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nuclear@0
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168 glTexCoord2f(1, 0); glVertex2f(1, 1);
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nuclear@0
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169 glTexCoord2f(0, 0); glVertex2f(-1, 1);
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nuclear@0
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170 glEnd();
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nuclear@0
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171
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nuclear@0
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172 bind_program(0);
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nuclear@0
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173 glDisable(GL_TEXTURE_2D);
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nuclear@0
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174
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nuclear@0
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175 glMatrixMode(GL_TEXTURE);
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nuclear@0
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176 glPopMatrix();
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nuclear@0
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177
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nuclear@1
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178 gui_draw();
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nuclear@0
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179 }
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nuclear@0
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180
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nuclear@0
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181 void reshape(int x, int y)
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nuclear@0
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182 {
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nuclear@0
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183 glViewport(0, 0, x, y);
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nuclear@0
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184 glMatrixMode(GL_PROJECTION);
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nuclear@0
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185 glLoadIdentity();
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nuclear@0
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186 gluPerspective(45.0, (float)x / (float)y, 1.0, 1000.0);
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nuclear@0
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187
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nuclear@5
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188 imtk_set_viewport(x, y);
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nuclear@5
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189
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nuclear@0
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190 if(ray_tex) {
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nuclear@0
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191 glDeleteTextures(1, &ray_tex);
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nuclear@0
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192 }
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nuclear@0
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193 ray_tex = create_ray_texture(x, y, 50.0, &tex_scale);
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nuclear@0
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194 }
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nuclear@0
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195
|
nuclear@0
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196
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nuclear@0
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197 void keyb(unsigned char key, int x, int y)
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nuclear@0
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198 {
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nuclear@0
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199 switch(key) {
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nuclear@0
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200 case 27:
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nuclear@0
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201 exit(0);
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nuclear@0
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202
|
nuclear@0
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203 case '-':
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nuclear@0
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204 if(iter > 1) {
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nuclear@0
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205 iter--;
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nuclear@0
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206 set_uniform_int(sdr, "iter", iter);
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nuclear@0
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207 printf("iter: %d\n", iter);
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nuclear@0
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208 glutPostRedisplay();
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nuclear@0
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209 }
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nuclear@0
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210 break;
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nuclear@0
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211
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nuclear@0
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212 case '=':
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nuclear@0
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213 iter++;
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nuclear@0
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214 set_uniform_int(sdr, "iter", iter);
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nuclear@0
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215 printf("iter: %d\n", iter);
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nuclear@0
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216 glutPostRedisplay();
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nuclear@0
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217 break;
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nuclear@0
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218
|
nuclear@0
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219 case ',':
|
nuclear@0
|
220 err_thres -= 0.001;
|
nuclear@0
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221 set_uniform_float(sdr, "err_thres", err_thres);
|
nuclear@0
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222 printf("maximum error: %f\n", err_thres);
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nuclear@0
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223 glutPostRedisplay();
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nuclear@0
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224 break;
|
nuclear@0
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225
|
nuclear@0
|
226 case '.':
|
nuclear@0
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227 err_thres += 0.001;
|
nuclear@0
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228 set_uniform_float(sdr, "err_thres", err_thres);
|
nuclear@0
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229 printf("maximum error: %f\n", err_thres);
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nuclear@0
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230 glutPostRedisplay();
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nuclear@0
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231 break;
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nuclear@0
|
232
|
nuclear@0
|
233 case 's':
|
nuclear@0
|
234 load_shader();
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nuclear@0
|
235 glutPostRedisplay();
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nuclear@0
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236 break;
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nuclear@1
|
237
|
nuclear@8
|
238 case 'S':
|
nuclear@8
|
239 use_stereo = !use_stereo;
|
nuclear@8
|
240 glutPostRedisplay();
|
nuclear@8
|
241 break;
|
nuclear@8
|
242
|
nuclear@1
|
243 case 'r':
|
nuclear@1
|
244 reflectivity = reflectivity > 0.0 ? 0.0 : 0.6;
|
nuclear@1
|
245 set_uniform_float(sdr, "reflectivity", reflectivity);
|
nuclear@1
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246 glutPostRedisplay();
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nuclear@1
|
247 break;
|
nuclear@1
|
248
|
nuclear@1
|
249 case '`':
|
nuclear@1
|
250 {
|
nuclear@1
|
251 static bool vis = true;
|
nuclear@1
|
252 vis = !vis;
|
nuclear@1
|
253 gui_set_visible(vis);
|
nuclear@1
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254 glutPostRedisplay();
|
nuclear@1
|
255 }
|
nuclear@1
|
256 break;
|
nuclear@5
|
257
|
nuclear@8
|
258 case '[':
|
nuclear@8
|
259 eye_sep -= 0.1;
|
nuclear@8
|
260 printf("eye separation: %f\n", eye_sep);
|
nuclear@8
|
261 glutPostRedisplay();
|
nuclear@8
|
262 break;
|
nuclear@8
|
263
|
nuclear@8
|
264 case ']':
|
nuclear@8
|
265 eye_sep += 0.1;
|
nuclear@8
|
266 printf("eye separation: %f\n", eye_sep);
|
nuclear@8
|
267 glutPostRedisplay();
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nuclear@8
|
268 break;
|
nuclear@8
|
269
|
nuclear@8
|
270
|
nuclear@5
|
271 case '\n':
|
nuclear@5
|
272 case '\r':
|
nuclear@5
|
273 printf("(%.3f %+.3fi %+.3fj %+.3fk) i:%d err: %.4f cam(theta: %.2f phi: %.2f rad: %.2f)\n", seed.w,
|
nuclear@5
|
274 seed.x, seed.y, seed.z, iter, err_thres, cam_theta, cam_phi, cam_dist);
|
nuclear@5
|
275 break;
|
nuclear@0
|
276 }
|
nuclear@1
|
277
|
nuclear@4
|
278 imtk_inp_key(key, 1);
|
nuclear@1
|
279 glutPostRedisplay();
|
nuclear@1
|
280 }
|
nuclear@1
|
281
|
nuclear@1
|
282 void keyb_up(unsigned char key, int x, int y)
|
nuclear@1
|
283 {
|
nuclear@4
|
284 imtk_inp_key(key, 0);
|
nuclear@1
|
285 glutPostRedisplay();
|
nuclear@0
|
286 }
|
nuclear@0
|
287
|
nuclear@0
|
288 int bnstate[16];
|
nuclear@0
|
289
|
nuclear@0
|
290 int prev_x = -1, prev_y;
|
nuclear@0
|
291 void mouse(int bn, int state, int x, int y)
|
nuclear@0
|
292 {
|
nuclear@4
|
293 int mod;
|
nuclear@1
|
294
|
nuclear@4
|
295 mod = glutGetModifiers();
|
nuclear@4
|
296
|
nuclear@4
|
297 if(mod) {
|
nuclear@1
|
298 bnstate[bn] = state == GLUT_DOWN ? 1 : 0;
|
nuclear@1
|
299 if(state == GLUT_DOWN) {
|
nuclear@1
|
300 if(bn == 3) {
|
nuclear@1
|
301 cam_dist -= 0.1;
|
nuclear@1
|
302 glutPostRedisplay();
|
nuclear@1
|
303 if(cam_dist < 0) cam_dist = 0;
|
nuclear@1
|
304 } else if(bn == 4) {
|
nuclear@1
|
305 cam_dist += 0.1;
|
nuclear@1
|
306 glutPostRedisplay();
|
nuclear@1
|
307 } else {
|
nuclear@1
|
308 prev_x = x;
|
nuclear@1
|
309 prev_y = y;
|
nuclear@1
|
310 }
|
nuclear@0
|
311 } else {
|
nuclear@1
|
312 prev_x = -1;
|
nuclear@0
|
313 }
|
nuclear@4
|
314 } else {
|
nuclear@4
|
315 imtk_inp_mouse(bn, state == GLUT_DOWN ? 1 : 0);
|
nuclear@0
|
316 }
|
nuclear@1
|
317 glutPostRedisplay();
|
nuclear@0
|
318 }
|
nuclear@0
|
319
|
nuclear@0
|
320 void motion(int x, int y)
|
nuclear@0
|
321 {
|
nuclear@0
|
322 if(bnstate[0]) {
|
nuclear@0
|
323 cam_theta += (x - prev_x) * 0.5;
|
nuclear@0
|
324 cam_phi += (y - prev_y) * 0.5;
|
nuclear@0
|
325
|
nuclear@0
|
326 if(cam_phi < -90) cam_phi = -90;
|
nuclear@0
|
327 if(cam_phi > 90) cam_phi = 90;
|
nuclear@0
|
328
|
nuclear@0
|
329 glutPostRedisplay();
|
nuclear@0
|
330 }
|
nuclear@0
|
331
|
nuclear@0
|
332 if(bnstate[1]) {
|
nuclear@0
|
333 cam_y += (y - prev_y) * 0.1;
|
nuclear@0
|
334 glutPostRedisplay();
|
nuclear@0
|
335 }
|
nuclear@0
|
336
|
nuclear@0
|
337 if(bnstate[2]) {
|
nuclear@0
|
338 cam_dist += (y - prev_y) * 0.1;
|
nuclear@6
|
339 if(cam_dist < 0.0) cam_dist = 0.0;
|
nuclear@0
|
340 glutPostRedisplay();
|
nuclear@0
|
341 }
|
nuclear@0
|
342
|
nuclear@0
|
343 prev_x = x;
|
nuclear@0
|
344 prev_y = y;
|
nuclear@1
|
345
|
nuclear@4
|
346 imtk_inp_motion(x, y);
|
nuclear@1
|
347 glutPostRedisplay();
|
nuclear@1
|
348 }
|
nuclear@1
|
349
|
nuclear@1
|
350 void passive_motion(int x, int y)
|
nuclear@1
|
351 {
|
nuclear@4
|
352 imtk_inp_motion(x, y);
|
nuclear@4
|
353 glutPostRedisplay();
|
nuclear@0
|
354 }
|
nuclear@0
|
355
|
nuclear@6
|
356 void sball_motion(int x, int y, int z)
|
nuclear@6
|
357 {
|
nuclear@6
|
358 float dx = (float)x * 0.0015f;
|
nuclear@6
|
359 float dy = (float)y * 0.0015f;
|
nuclear@6
|
360 float dz = -(float)z * 0.001f;
|
nuclear@6
|
361 float angle = -DEG_TO_RAD(cam_theta);
|
nuclear@6
|
362
|
nuclear@6
|
363 cam_x += cos(angle) * dx + sin(angle) * dz;
|
nuclear@6
|
364 cam_z += -sin(angle) * dx + cos(angle) * dz;
|
nuclear@6
|
365 cam_y += dy;
|
nuclear@6
|
366
|
nuclear@6
|
367 glutPostRedisplay();
|
nuclear@6
|
368 }
|
nuclear@6
|
369
|
nuclear@6
|
370 void sball_rot(int x, int y, int z)
|
nuclear@6
|
371 {
|
nuclear@6
|
372 cam_theta += -y / 15.0;
|
nuclear@6
|
373 cam_phi += -x / 15.0;
|
nuclear@6
|
374 glutPostRedisplay();
|
nuclear@6
|
375 }
|
nuclear@6
|
376
|
nuclear@6
|
377 void sball_button(int bn, int state)
|
nuclear@6
|
378 {
|
nuclear@6
|
379 if(state == GLUT_DOWN) {
|
nuclear@6
|
380 switch(bn) {
|
nuclear@6
|
381 case 0:
|
nuclear@6
|
382 /* TODO reset */
|
nuclear@6
|
383 break;
|
nuclear@6
|
384
|
nuclear@6
|
385 default:
|
nuclear@6
|
386 break;
|
nuclear@6
|
387 }
|
nuclear@6
|
388 }
|
nuclear@6
|
389 }
|
nuclear@6
|
390
|
nuclear@6
|
391
|
nuclear@0
|
392 unsigned int create_ray_texture(int xsz, int ysz, float vfov, Vector2 *tex_scale)
|
nuclear@0
|
393 {
|
nuclear@0
|
394 unsigned int tex;
|
nuclear@0
|
395 int tex_xsz = round_pow2(xsz);
|
nuclear@0
|
396 int tex_ysz = round_pow2(ysz);
|
nuclear@0
|
397 float *teximg, *dir;
|
nuclear@0
|
398
|
nuclear@0
|
399 teximg = new float[3 * tex_xsz * tex_ysz];
|
nuclear@0
|
400 dir = teximg;
|
nuclear@0
|
401
|
nuclear@0
|
402 for(int i=0; i<tex_ysz; i++) {
|
nuclear@0
|
403 for(int j=0; j<tex_xsz; j++) {
|
nuclear@0
|
404 if(j < xsz && i < ysz) {
|
nuclear@0
|
405 Vector3 rdir = get_primary_ray_dir(j, i, xsz, ysz, vfov);
|
nuclear@0
|
406 dir[0] = rdir.x;
|
nuclear@0
|
407 dir[1] = rdir.y;
|
nuclear@0
|
408 dir[2] = rdir.z;
|
nuclear@0
|
409 } else {
|
nuclear@0
|
410 dir[0] = dir[1] = 0.0f;
|
nuclear@0
|
411 dir[2] = 1.0f;
|
nuclear@0
|
412 }
|
nuclear@0
|
413
|
nuclear@0
|
414 dir += 3;
|
nuclear@0
|
415 }
|
nuclear@0
|
416 }
|
nuclear@0
|
417
|
nuclear@0
|
418 glGenTextures(1, &tex);
|
nuclear@0
|
419 glBindTexture(GL_TEXTURE_2D, tex);
|
nuclear@0
|
420 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
|
nuclear@0
|
421 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
|
nuclear@0
|
422 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
|
nuclear@0
|
423 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
|
nuclear@0
|
424 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB32F_ARB, tex_xsz, tex_ysz, 0, GL_RGB, GL_FLOAT, teximg);
|
nuclear@0
|
425 delete [] teximg;
|
nuclear@0
|
426
|
nuclear@0
|
427 if(tex_scale) {
|
nuclear@0
|
428 tex_scale->x = (float)xsz / (float)tex_xsz;
|
nuclear@0
|
429 tex_scale->y = (float)ysz / (float)tex_ysz;
|
nuclear@0
|
430 }
|
nuclear@0
|
431 return tex;
|
nuclear@0
|
432 }
|
nuclear@0
|
433
|
nuclear@0
|
434 static Vector3 get_primary_ray_dir(int x, int y, int w, int h, float vfov_deg)
|
nuclear@0
|
435 {
|
nuclear@0
|
436 float vfov = M_PI * vfov_deg / 180.0;
|
nuclear@0
|
437 float aspect = (float)w / (float)h;
|
nuclear@0
|
438
|
nuclear@0
|
439 float ysz = 2.0;
|
nuclear@0
|
440 float xsz = aspect * ysz;
|
nuclear@0
|
441
|
nuclear@0
|
442 float px = ((float)x / (float)w) * xsz - xsz / 2.0;
|
nuclear@0
|
443 float py = 1.0 - ((float)y / (float)h) * ysz;
|
nuclear@0
|
444 float pz = 1.0 / tan(0.5 * vfov);
|
nuclear@0
|
445
|
nuclear@0
|
446 float mag = sqrt(px * px + py * py + pz * pz);
|
nuclear@0
|
447
|
nuclear@0
|
448 return Vector3(px / mag, py / mag, pz / mag);
|
nuclear@0
|
449 }
|
nuclear@0
|
450
|
nuclear@0
|
451 static int round_pow2(int x)
|
nuclear@0
|
452 {
|
nuclear@0
|
453 x--;
|
nuclear@0
|
454 x = (x >> 1) | x;
|
nuclear@0
|
455 x = (x >> 2) | x;
|
nuclear@0
|
456 x = (x >> 4) | x;
|
nuclear@0
|
457 x = (x >> 8) | x;
|
nuclear@0
|
458 x = (x >> 16) | x;
|
nuclear@0
|
459 return x + 1;
|
nuclear@0
|
460 }
|
nuclear@8
|
461
|
nuclear@8
|
462 int parse_opt(int argc, char **argv)
|
nuclear@8
|
463 {
|
nuclear@8
|
464 int i;
|
nuclear@8
|
465
|
nuclear@8
|
466 for(i=1; i<argc; i++) {
|
nuclear@8
|
467 if(argv[i][0] == '-' && argv[i][2] == 0) {
|
nuclear@8
|
468 switch(argv[i][1]) {
|
nuclear@8
|
469 case 's':
|
nuclear@8
|
470 use_stereo = !use_stereo;
|
nuclear@8
|
471 break;
|
nuclear@8
|
472
|
nuclear@8
|
473 default:
|
nuclear@8
|
474 goto invalid;
|
nuclear@8
|
475 }
|
nuclear@8
|
476 } else {
|
nuclear@8
|
477 goto invalid;
|
nuclear@8
|
478 }
|
nuclear@8
|
479 }
|
nuclear@8
|
480
|
nuclear@8
|
481 return 0;
|
nuclear@8
|
482
|
nuclear@8
|
483 invalid:
|
nuclear@8
|
484 fprintf(stderr, "invalid option: %s\n", argv[i]);
|
nuclear@8
|
485 return -1;
|
nuclear@8
|
486 }
|