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@10
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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@10
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16 void idle();
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nuclear@0
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17 void reshape(int x, int y);
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nuclear@0
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18 void keyb(unsigned char key, int x, int y);
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nuclear@1
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19 void keyb_up(unsigned char key, int x, int y);
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nuclear@0
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20 void mouse(int bn, int state, int x, int y);
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nuclear@0
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21 void motion(int x, int y);
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nuclear@1
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22 void passive_motion(int x, int y);
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nuclear@6
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23 void sball_motion(int x, int y, int z);
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nuclear@6
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24 void sball_rot(int x, int y, int z);
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nuclear@6
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25 void sball_button(int bn, int state);
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nuclear@6
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26
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nuclear@0
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27
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nuclear@0
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28 int load_shader();
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nuclear@0
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29 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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30 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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31 static int round_pow2(int x);
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nuclear@0
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32
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nuclear@8
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33 int parse_opt(int argc, char **argv);
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nuclear@8
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34
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nuclear@8
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35
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nuclear@0
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36 float cam_theta = 0, cam_phi = 0, cam_dist = 4.0;
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nuclear@6
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37 float cam_x, cam_y, cam_z;
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nuclear@0
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38
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nuclear@0
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39 unsigned int sdr;
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nuclear@0
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40 unsigned int ray_tex;
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nuclear@0
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41 Vector2 tex_scale;
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nuclear@0
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42 Vector4 seed;
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nuclear@10
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43 float err_thres = 0.005;
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nuclear@0
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44 int iter = 10;
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nuclear@1
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45 float reflectivity = 0.2;
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nuclear@5
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46 Vector3 color(0.75, 0.75, 0.75);
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nuclear@0
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47
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nuclear@10
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48 int use_stereo, benchmark_mode;
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nuclear@8
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49 float eye_sep = 0.5;
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nuclear@8
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50
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nuclear@0
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51 int main(int argc, char **argv)
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nuclear@0
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52 {
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nuclear@0
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53 int xsz, ysz;
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nuclear@0
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54
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nuclear@0
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55 seed = Vector4(0.4, 0.0, 0.0, -0.8);
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nuclear@0
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56
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nuclear@0
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57 glutInitWindowSize(640, 480);
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nuclear@0
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58 glutInit(&argc, argv);
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nuclear@8
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59
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nuclear@8
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60 if(parse_opt(argc, argv) == -1) {
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nuclear@8
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61 return 1;
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nuclear@8
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62 }
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nuclear@8
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63
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nuclear@8
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64 glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | (use_stereo ? GLUT_STEREO : 0));
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nuclear@0
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65 glutCreateWindow("Raytraced Fractals");
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nuclear@0
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66 xsz = glutGet(GLUT_WINDOW_WIDTH);
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nuclear@0
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67 ysz = glutGet(GLUT_WINDOW_HEIGHT);
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nuclear@0
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68
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nuclear@0
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69 glutDisplayFunc(disp);
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nuclear@0
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70 glutReshapeFunc(reshape);
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nuclear@0
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71 glutKeyboardFunc(keyb);
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nuclear@1
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72 glutKeyboardUpFunc(keyb_up);
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nuclear@0
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73 glutMouseFunc(mouse);
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nuclear@0
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74 glutMotionFunc(motion);
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nuclear@1
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75 glutPassiveMotionFunc(passive_motion);
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nuclear@6
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76 glutSpaceballMotionFunc(sball_motion);
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nuclear@6
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77 glutSpaceballRotateFunc(sball_rot);
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nuclear@6
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78 glutSpaceballButtonFunc(sball_button);
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nuclear@10
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79 if(benchmark_mode) {
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nuclear@10
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80 glutIdleFunc(idle);
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nuclear@10
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81 }
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nuclear@0
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82
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nuclear@0
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83 glewInit();
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nuclear@0
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84
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nuclear@8
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85 glEnable(GL_CULL_FACE);
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nuclear@8
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86
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nuclear@0
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87 if(load_shader() == -1) {
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nuclear@0
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88 return 1;
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nuclear@0
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89 }
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nuclear@0
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90
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nuclear@1
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91 if(gui_init(xsz, ysz) == -1) {
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nuclear@1
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92 return 1;
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nuclear@1
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93 }
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nuclear@1
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94
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nuclear@0
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95 glutMainLoop();
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nuclear@0
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96 return 0;
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nuclear@0
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97 }
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nuclear@0
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98
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nuclear@0
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99 int load_shader()
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nuclear@0
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100 {
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nuclear@0
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101 if(sdr) {
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nuclear@0
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102 free_program(sdr);
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nuclear@0
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103 }
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nuclear@0
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104
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nuclear@0
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105 if(!(sdr = create_program_load("sdr/sdr.v.glsl", "sdr/julia.p.glsl"))) {
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nuclear@0
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106 return -1;
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nuclear@0
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107 }
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nuclear@0
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108 set_uniform_float4(sdr, "seed", seed.x, seed.y, seed.z, seed.w);
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nuclear@0
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109 set_uniform_float(sdr, "err_thres", err_thres);
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nuclear@0
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110 set_uniform_int(sdr, "iter", iter);
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nuclear@1
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111 set_uniform_float(sdr, "reflectivity", reflectivity);
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nuclear@1
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112 set_uniform_float3(sdr, "diffuse_color", color.x, color.y, color.z);
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nuclear@1
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113
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nuclear@0
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114 return 0;
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nuclear@0
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115 }
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nuclear@0
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116
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nuclear@0
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117 void disp()
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nuclear@0
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118 {
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nuclear@0
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119 glMatrixMode(GL_MODELVIEW);
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nuclear@0
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120 glLoadIdentity();
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nuclear@6
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121 glTranslatef(cam_x, cam_y, -cam_z);
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nuclear@0
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122 glRotatef(cam_theta, 0, 1, 0);
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nuclear@0
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123 glRotatef(cam_phi, 1, 0, 0);
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nuclear@0
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124 glTranslatef(0, 0, -cam_dist);
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nuclear@0
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125
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nuclear@0
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126 float lpos[] = {-1, 1, 3, 0};
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nuclear@0
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127 glLightfv(GL_LIGHT0, GL_POSITION, lpos);
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nuclear@0
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128
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nuclear@0
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129
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nuclear@4
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130 set_uniform_float4(sdr, "seed", seed.x, seed.y, seed.z, seed.w);
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nuclear@4
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131 set_uniform_float(sdr, "reflectivity", reflectivity);
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nuclear@4
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132 set_uniform_int(sdr, "iter", iter);
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nuclear@4
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133 set_uniform_float(sdr, "err_thres", err_thres);
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nuclear@5
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134 set_uniform_float3(sdr, "diffuse_color", color.x, color.y, color.z);
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nuclear@4
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135
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nuclear@8
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136 glBindTexture(GL_TEXTURE_2D, ray_tex);
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nuclear@8
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137
|
nuclear@8
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138
|
nuclear@8
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139 if(use_stereo) {
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nuclear@8
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140 glDrawBuffer(GL_BACK_LEFT);
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nuclear@8
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141 set_uniform_float(sdr, "eye_offs", -eye_sep / 2.0);
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nuclear@8
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142 } else {
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nuclear@8
|
143 set_uniform_float(sdr, "eye_offs", 0);
|
nuclear@8
|
144 }
|
nuclear@8
|
145
|
nuclear@8
|
146 render();
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nuclear@8
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147
|
nuclear@8
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148 if(use_stereo) {
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nuclear@8
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149 glDrawBuffer(GL_BACK_RIGHT);
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nuclear@8
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150
|
nuclear@8
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151 set_uniform_float(sdr, "eye_offs", eye_sep / 2.0);
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nuclear@8
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152 render();
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nuclear@8
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153 }
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nuclear@8
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154
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nuclear@8
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155 glutSwapBuffers();
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nuclear@8
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156 assert(glGetError() == GL_NO_ERROR);
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nuclear@8
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157 }
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nuclear@8
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158
|
nuclear@10
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159 void idle()
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nuclear@10
|
160 {
|
nuclear@10
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161 glutPostRedisplay();
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nuclear@10
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162 }
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nuclear@10
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163
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nuclear@8
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164 void render()
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nuclear@8
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165 {
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nuclear@0
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166 glMatrixMode(GL_TEXTURE);
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nuclear@0
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167 glPushMatrix();
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nuclear@0
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168 glScalef(tex_scale.x, tex_scale.y, 1.0);
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nuclear@0
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169
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nuclear@0
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170 glEnable(GL_TEXTURE_2D);
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nuclear@0
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171 bind_program(sdr);
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nuclear@0
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172
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nuclear@0
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173 glBegin(GL_QUADS);
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nuclear@0
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174 glColor3f(1, 1, 1);
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nuclear@0
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175 glTexCoord2f(0, 1); glVertex2f(-1, -1);
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nuclear@0
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176 glTexCoord2f(1, 1); glVertex2f(1, -1);
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nuclear@0
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177 glTexCoord2f(1, 0); glVertex2f(1, 1);
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nuclear@0
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178 glTexCoord2f(0, 0); glVertex2f(-1, 1);
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nuclear@0
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179 glEnd();
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nuclear@0
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180
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nuclear@0
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181 bind_program(0);
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nuclear@0
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182 glDisable(GL_TEXTURE_2D);
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nuclear@0
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183
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nuclear@0
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184 glMatrixMode(GL_TEXTURE);
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nuclear@0
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185 glPopMatrix();
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nuclear@0
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186
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nuclear@1
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187 gui_draw();
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nuclear@0
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188 }
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nuclear@0
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189
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nuclear@0
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190 void reshape(int x, int y)
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nuclear@0
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191 {
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nuclear@0
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192 glViewport(0, 0, x, y);
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nuclear@0
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193 glMatrixMode(GL_PROJECTION);
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nuclear@0
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194 glLoadIdentity();
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nuclear@0
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195 gluPerspective(45.0, (float)x / (float)y, 1.0, 1000.0);
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nuclear@0
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196
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nuclear@5
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197 imtk_set_viewport(x, y);
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nuclear@5
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198
|
nuclear@0
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199 if(ray_tex) {
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nuclear@0
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200 glDeleteTextures(1, &ray_tex);
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nuclear@0
|
201 }
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nuclear@0
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202 ray_tex = create_ray_texture(x, y, 50.0, &tex_scale);
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nuclear@0
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203 }
|
nuclear@0
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204
|
nuclear@0
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205
|
nuclear@0
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206 void keyb(unsigned char key, int x, int y)
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nuclear@0
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207 {
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nuclear@0
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208 switch(key) {
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nuclear@0
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209 case 27:
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nuclear@0
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210 exit(0);
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nuclear@0
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211
|
nuclear@0
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212 case '-':
|
nuclear@0
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213 if(iter > 1) {
|
nuclear@0
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214 iter--;
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nuclear@0
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215 set_uniform_int(sdr, "iter", iter);
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nuclear@0
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216 printf("iter: %d\n", iter);
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nuclear@0
|
217 glutPostRedisplay();
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nuclear@0
|
218 }
|
nuclear@0
|
219 break;
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nuclear@0
|
220
|
nuclear@0
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221 case '=':
|
nuclear@0
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222 iter++;
|
nuclear@0
|
223 set_uniform_int(sdr, "iter", iter);
|
nuclear@0
|
224 printf("iter: %d\n", iter);
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nuclear@0
|
225 glutPostRedisplay();
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nuclear@0
|
226 break;
|
nuclear@0
|
227
|
nuclear@0
|
228 case ',':
|
nuclear@0
|
229 err_thres -= 0.001;
|
nuclear@0
|
230 set_uniform_float(sdr, "err_thres", err_thres);
|
nuclear@0
|
231 printf("maximum error: %f\n", err_thres);
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nuclear@0
|
232 glutPostRedisplay();
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nuclear@0
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233 break;
|
nuclear@0
|
234
|
nuclear@0
|
235 case '.':
|
nuclear@0
|
236 err_thres += 0.001;
|
nuclear@0
|
237 set_uniform_float(sdr, "err_thres", err_thres);
|
nuclear@0
|
238 printf("maximum error: %f\n", err_thres);
|
nuclear@0
|
239 glutPostRedisplay();
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nuclear@0
|
240 break;
|
nuclear@0
|
241
|
nuclear@0
|
242 case 's':
|
nuclear@0
|
243 load_shader();
|
nuclear@0
|
244 glutPostRedisplay();
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nuclear@0
|
245 break;
|
nuclear@1
|
246
|
nuclear@8
|
247 case 'S':
|
nuclear@8
|
248 use_stereo = !use_stereo;
|
nuclear@8
|
249 glutPostRedisplay();
|
nuclear@8
|
250 break;
|
nuclear@8
|
251
|
nuclear@1
|
252 case 'r':
|
nuclear@1
|
253 reflectivity = reflectivity > 0.0 ? 0.0 : 0.6;
|
nuclear@1
|
254 set_uniform_float(sdr, "reflectivity", reflectivity);
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nuclear@1
|
255 glutPostRedisplay();
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nuclear@1
|
256 break;
|
nuclear@1
|
257
|
nuclear@1
|
258 case '`':
|
nuclear@1
|
259 {
|
nuclear@1
|
260 static bool vis = true;
|
nuclear@1
|
261 vis = !vis;
|
nuclear@1
|
262 gui_set_visible(vis);
|
nuclear@1
|
263 glutPostRedisplay();
|
nuclear@1
|
264 }
|
nuclear@1
|
265 break;
|
nuclear@5
|
266
|
nuclear@8
|
267 case '[':
|
nuclear@8
|
268 eye_sep -= 0.1;
|
nuclear@8
|
269 printf("eye separation: %f\n", eye_sep);
|
nuclear@8
|
270 glutPostRedisplay();
|
nuclear@8
|
271 break;
|
nuclear@8
|
272
|
nuclear@8
|
273 case ']':
|
nuclear@8
|
274 eye_sep += 0.1;
|
nuclear@8
|
275 printf("eye separation: %f\n", eye_sep);
|
nuclear@8
|
276 glutPostRedisplay();
|
nuclear@8
|
277 break;
|
nuclear@8
|
278
|
nuclear@8
|
279
|
nuclear@5
|
280 case '\n':
|
nuclear@5
|
281 case '\r':
|
nuclear@5
|
282 printf("(%.3f %+.3fi %+.3fj %+.3fk) i:%d err: %.4f cam(theta: %.2f phi: %.2f rad: %.2f)\n", seed.w,
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nuclear@5
|
283 seed.x, seed.y, seed.z, iter, err_thres, cam_theta, cam_phi, cam_dist);
|
nuclear@5
|
284 break;
|
nuclear@0
|
285 }
|
nuclear@1
|
286
|
nuclear@4
|
287 imtk_inp_key(key, 1);
|
nuclear@1
|
288 glutPostRedisplay();
|
nuclear@1
|
289 }
|
nuclear@1
|
290
|
nuclear@1
|
291 void keyb_up(unsigned char key, int x, int y)
|
nuclear@1
|
292 {
|
nuclear@4
|
293 imtk_inp_key(key, 0);
|
nuclear@1
|
294 glutPostRedisplay();
|
nuclear@0
|
295 }
|
nuclear@0
|
296
|
nuclear@0
|
297 int bnstate[16];
|
nuclear@0
|
298
|
nuclear@0
|
299 int prev_x = -1, prev_y;
|
nuclear@0
|
300 void mouse(int bn, int state, int x, int y)
|
nuclear@0
|
301 {
|
nuclear@10
|
302 int mod = glutGetModifiers();
|
nuclear@4
|
303
|
nuclear@4
|
304 if(mod) {
|
nuclear@1
|
305 bnstate[bn] = state == GLUT_DOWN ? 1 : 0;
|
nuclear@1
|
306 if(state == GLUT_DOWN) {
|
nuclear@1
|
307 if(bn == 3) {
|
nuclear@1
|
308 cam_dist -= 0.1;
|
nuclear@1
|
309 glutPostRedisplay();
|
nuclear@1
|
310 if(cam_dist < 0) cam_dist = 0;
|
nuclear@1
|
311 } else if(bn == 4) {
|
nuclear@1
|
312 cam_dist += 0.1;
|
nuclear@1
|
313 glutPostRedisplay();
|
nuclear@1
|
314 } else {
|
nuclear@1
|
315 prev_x = x;
|
nuclear@1
|
316 prev_y = y;
|
nuclear@1
|
317 }
|
nuclear@0
|
318 } else {
|
nuclear@1
|
319 prev_x = -1;
|
nuclear@0
|
320 }
|
nuclear@4
|
321 } else {
|
nuclear@4
|
322 imtk_inp_mouse(bn, state == GLUT_DOWN ? 1 : 0);
|
nuclear@0
|
323 }
|
nuclear@1
|
324 glutPostRedisplay();
|
nuclear@0
|
325 }
|
nuclear@0
|
326
|
nuclear@0
|
327 void motion(int x, int y)
|
nuclear@0
|
328 {
|
nuclear@0
|
329 if(bnstate[0]) {
|
nuclear@0
|
330 cam_theta += (x - prev_x) * 0.5;
|
nuclear@0
|
331 cam_phi += (y - prev_y) * 0.5;
|
nuclear@0
|
332
|
nuclear@0
|
333 if(cam_phi < -90) cam_phi = -90;
|
nuclear@0
|
334 if(cam_phi > 90) cam_phi = 90;
|
nuclear@0
|
335
|
nuclear@0
|
336 glutPostRedisplay();
|
nuclear@0
|
337 }
|
nuclear@0
|
338
|
nuclear@0
|
339 if(bnstate[1]) {
|
nuclear@0
|
340 cam_y += (y - prev_y) * 0.1;
|
nuclear@0
|
341 glutPostRedisplay();
|
nuclear@0
|
342 }
|
nuclear@0
|
343
|
nuclear@0
|
344 if(bnstate[2]) {
|
nuclear@0
|
345 cam_dist += (y - prev_y) * 0.1;
|
nuclear@6
|
346 if(cam_dist < 0.0) cam_dist = 0.0;
|
nuclear@0
|
347 glutPostRedisplay();
|
nuclear@0
|
348 }
|
nuclear@0
|
349
|
nuclear@0
|
350 prev_x = x;
|
nuclear@0
|
351 prev_y = y;
|
nuclear@1
|
352
|
nuclear@4
|
353 imtk_inp_motion(x, y);
|
nuclear@1
|
354 glutPostRedisplay();
|
nuclear@1
|
355 }
|
nuclear@1
|
356
|
nuclear@1
|
357 void passive_motion(int x, int y)
|
nuclear@1
|
358 {
|
nuclear@4
|
359 imtk_inp_motion(x, y);
|
nuclear@4
|
360 glutPostRedisplay();
|
nuclear@0
|
361 }
|
nuclear@0
|
362
|
nuclear@6
|
363 void sball_motion(int x, int y, int z)
|
nuclear@6
|
364 {
|
nuclear@6
|
365 float dx = (float)x * 0.0015f;
|
nuclear@6
|
366 float dy = (float)y * 0.0015f;
|
nuclear@6
|
367 float dz = -(float)z * 0.001f;
|
nuclear@6
|
368 float angle = -DEG_TO_RAD(cam_theta);
|
nuclear@6
|
369
|
nuclear@6
|
370 cam_x += cos(angle) * dx + sin(angle) * dz;
|
nuclear@6
|
371 cam_z += -sin(angle) * dx + cos(angle) * dz;
|
nuclear@6
|
372 cam_y += dy;
|
nuclear@6
|
373
|
nuclear@6
|
374 glutPostRedisplay();
|
nuclear@6
|
375 }
|
nuclear@6
|
376
|
nuclear@6
|
377 void sball_rot(int x, int y, int z)
|
nuclear@6
|
378 {
|
nuclear@6
|
379 cam_theta += -y / 15.0;
|
nuclear@6
|
380 cam_phi += -x / 15.0;
|
nuclear@6
|
381 glutPostRedisplay();
|
nuclear@6
|
382 }
|
nuclear@6
|
383
|
nuclear@6
|
384 void sball_button(int bn, int state)
|
nuclear@6
|
385 {
|
nuclear@6
|
386 if(state == GLUT_DOWN) {
|
nuclear@6
|
387 switch(bn) {
|
nuclear@6
|
388 case 0:
|
nuclear@6
|
389 /* TODO reset */
|
nuclear@6
|
390 break;
|
nuclear@6
|
391
|
nuclear@6
|
392 default:
|
nuclear@6
|
393 break;
|
nuclear@6
|
394 }
|
nuclear@6
|
395 }
|
nuclear@6
|
396 }
|
nuclear@6
|
397
|
nuclear@6
|
398
|
nuclear@0
|
399 unsigned int create_ray_texture(int xsz, int ysz, float vfov, Vector2 *tex_scale)
|
nuclear@0
|
400 {
|
nuclear@0
|
401 unsigned int tex;
|
nuclear@0
|
402 int tex_xsz = round_pow2(xsz);
|
nuclear@0
|
403 int tex_ysz = round_pow2(ysz);
|
nuclear@0
|
404 float *teximg, *dir;
|
nuclear@0
|
405
|
nuclear@0
|
406 teximg = new float[3 * tex_xsz * tex_ysz];
|
nuclear@0
|
407 dir = teximg;
|
nuclear@0
|
408
|
nuclear@0
|
409 for(int i=0; i<tex_ysz; i++) {
|
nuclear@0
|
410 for(int j=0; j<tex_xsz; j++) {
|
nuclear@0
|
411 if(j < xsz && i < ysz) {
|
nuclear@0
|
412 Vector3 rdir = get_primary_ray_dir(j, i, xsz, ysz, vfov);
|
nuclear@0
|
413 dir[0] = rdir.x;
|
nuclear@0
|
414 dir[1] = rdir.y;
|
nuclear@0
|
415 dir[2] = rdir.z;
|
nuclear@0
|
416 } else {
|
nuclear@0
|
417 dir[0] = dir[1] = 0.0f;
|
nuclear@0
|
418 dir[2] = 1.0f;
|
nuclear@0
|
419 }
|
nuclear@0
|
420
|
nuclear@0
|
421 dir += 3;
|
nuclear@0
|
422 }
|
nuclear@0
|
423 }
|
nuclear@0
|
424
|
nuclear@0
|
425 glGenTextures(1, &tex);
|
nuclear@0
|
426 glBindTexture(GL_TEXTURE_2D, tex);
|
nuclear@0
|
427 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
|
nuclear@0
|
428 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
|
nuclear@0
|
429 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
|
nuclear@0
|
430 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
|
nuclear@0
|
431 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB32F_ARB, tex_xsz, tex_ysz, 0, GL_RGB, GL_FLOAT, teximg);
|
nuclear@0
|
432 delete [] teximg;
|
nuclear@0
|
433
|
nuclear@0
|
434 if(tex_scale) {
|
nuclear@0
|
435 tex_scale->x = (float)xsz / (float)tex_xsz;
|
nuclear@0
|
436 tex_scale->y = (float)ysz / (float)tex_ysz;
|
nuclear@0
|
437 }
|
nuclear@0
|
438 return tex;
|
nuclear@0
|
439 }
|
nuclear@0
|
440
|
nuclear@0
|
441 static Vector3 get_primary_ray_dir(int x, int y, int w, int h, float vfov_deg)
|
nuclear@0
|
442 {
|
nuclear@0
|
443 float vfov = M_PI * vfov_deg / 180.0;
|
nuclear@0
|
444 float aspect = (float)w / (float)h;
|
nuclear@0
|
445
|
nuclear@0
|
446 float ysz = 2.0;
|
nuclear@0
|
447 float xsz = aspect * ysz;
|
nuclear@0
|
448
|
nuclear@0
|
449 float px = ((float)x / (float)w) * xsz - xsz / 2.0;
|
nuclear@0
|
450 float py = 1.0 - ((float)y / (float)h) * ysz;
|
nuclear@0
|
451 float pz = 1.0 / tan(0.5 * vfov);
|
nuclear@0
|
452
|
nuclear@0
|
453 float mag = sqrt(px * px + py * py + pz * pz);
|
nuclear@0
|
454
|
nuclear@0
|
455 return Vector3(px / mag, py / mag, pz / mag);
|
nuclear@0
|
456 }
|
nuclear@0
|
457
|
nuclear@0
|
458 static int round_pow2(int x)
|
nuclear@0
|
459 {
|
nuclear@0
|
460 x--;
|
nuclear@0
|
461 x = (x >> 1) | x;
|
nuclear@0
|
462 x = (x >> 2) | x;
|
nuclear@0
|
463 x = (x >> 4) | x;
|
nuclear@0
|
464 x = (x >> 8) | x;
|
nuclear@0
|
465 x = (x >> 16) | x;
|
nuclear@0
|
466 return x + 1;
|
nuclear@0
|
467 }
|
nuclear@8
|
468
|
nuclear@8
|
469 int parse_opt(int argc, char **argv)
|
nuclear@8
|
470 {
|
nuclear@8
|
471 int i;
|
nuclear@8
|
472
|
nuclear@8
|
473 for(i=1; i<argc; i++) {
|
nuclear@8
|
474 if(argv[i][0] == '-' && argv[i][2] == 0) {
|
nuclear@8
|
475 switch(argv[i][1]) {
|
nuclear@8
|
476 case 's':
|
nuclear@8
|
477 use_stereo = !use_stereo;
|
nuclear@8
|
478 break;
|
nuclear@8
|
479
|
nuclear@10
|
480 case 'b':
|
nuclear@10
|
481 benchmark_mode = 1;
|
nuclear@10
|
482 break;
|
nuclear@10
|
483
|
nuclear@8
|
484 default:
|
nuclear@8
|
485 goto invalid;
|
nuclear@8
|
486 }
|
nuclear@8
|
487 } else {
|
nuclear@8
|
488 goto invalid;
|
nuclear@8
|
489 }
|
nuclear@8
|
490 }
|
nuclear@8
|
491
|
nuclear@8
|
492 return 0;
|
nuclear@8
|
493
|
nuclear@8
|
494 invalid:
|
nuclear@8
|
495 fprintf(stderr, "invalid option: %s\n", argv[i]);
|
nuclear@8
|
496 return -1;
|
nuclear@8
|
497 }
|