volmetrics

annotate src/main.cc @ 6:e6485ef45e6e

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visualize volume
author Eleni Maria Stea <elene.mst@gmail.com>
date Sat, 18 Jan 2014 01:57:52 +0200
parents cca2e05dbabe
children 5455c9723d9e
rev   line source
eleni@0 1 #include <GL/glew.h>
eleni@0 2 #include <GL/glut.h>
eleni@0 3
eleni@0 4 #include <stdio.h>
eleni@0 5 #include <assert.h>
eleni@0 6
elene@6 7 #include "volume.h"
eleni@1 8
eleni@0 9 //static void init(void);
eleni@0 10 static void display(void);
eleni@0 11 static void reshape(int x, int y);
eleni@0 12 static void keyboard(unsigned char key, int x, int y);
eleni@0 13 static void mouse(int button, int state, int x, int y);
eleni@0 14 static void motion(int x, int y);
eleni@0 15
eleni@0 16 static int win_xsz, win_ysz;
eleni@0 17
eleni@1 18 /////////////////////////////
eleni@1 19 // debug TODO remove
eleni@1 20 ////////////////////////////
eleni@1 21 static bool init();
elene@6 22
elene@6 23 static Volume *vol;
elene@6 24 static float cur_z;
eleni@1 25
eleni@0 26 int main(int argc, char **argv)
eleni@0 27 {
eleni@0 28 glutInit(&argc, argv);
eleni@0 29 glutInitWindowSize(1280, 720);
eleni@0 30 glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
eleni@0 31
eleni@0 32 //TODO parse arguments
eleni@0 33
eleni@0 34 glutCreateWindow("My Colonoscopie OEO!");
eleni@0 35
eleni@0 36 glutDisplayFunc(display);
eleni@0 37 glutReshapeFunc(reshape);
eleni@0 38 glutKeyboardFunc(keyboard);
eleni@0 39 glutMouseFunc(mouse);
eleni@0 40 glutMotionFunc(motion);
eleni@0 41
eleni@0 42 glewInit();
eleni@1 43 if(!init()) {
eleni@1 44 fprintf(stderr, "Failed to initialize La votre Colonoscopie\n");
eleni@1 45 return 1;
eleni@1 46 }
eleni@0 47
eleni@0 48 //call init
eleni@0 49
eleni@0 50 glutMainLoop();
eleni@0 51 return 0;
eleni@0 52 }
eleni@0 53
eleni@0 54 void display(void)
eleni@0 55 {
eleni@0 56 //render
elene@6 57 glBindTexture(GL_TEXTURE_3D, vol->get_texture());
elene@6 58 glEnable(GL_TEXTURE_3D);
eleni@1 59 glBegin(GL_QUADS);
elene@6 60 glTexCoord3f(0, 0, cur_z); glVertex3f(-1, -1, 0);
elene@6 61 glTexCoord3f(0, 1, cur_z); glVertex3f(-1, 1, 0);
elene@6 62 glTexCoord3f(1, 1, cur_z); glVertex3f(1, 1, 0);
elene@6 63 glTexCoord3f(1, 0, cur_z); glVertex3f(1, -1, 0);
eleni@1 64 glEnd();
elene@6 65 glDisable(GL_TEXTURE_3D);
eleni@0 66
eleni@0 67 glutSwapBuffers();
eleni@0 68 assert(glGetError() == GL_NO_ERROR);
eleni@0 69 }
eleni@0 70
eleni@0 71 void reshape(int x, int y)
eleni@0 72 {
eleni@0 73 glViewport(0, 0, x, y);
eleni@0 74 if(x != win_xsz || y != win_ysz) {
eleni@0 75 //TODO raytex_needs_recalc = 1;
eleni@0 76 win_xsz = x;
eleni@0 77 win_ysz = y;
eleni@0 78 }
eleni@0 79 }
eleni@0 80
eleni@0 81 void keyboard(unsigned char key, int x, int y)
eleni@0 82 {
eleni@0 83 switch(key) {
eleni@0 84 case 27:
eleni@0 85 exit(0);
eleni@0 86 default:
eleni@0 87 break;
eleni@0 88 }
eleni@0 89 }
eleni@0 90
eleni@0 91 static int prev_x, prev_y;
eleni@0 92 void mouse(int bn, int state, int x, int y)
eleni@0 93 {
eleni@0 94 prev_x = x;
eleni@0 95 prev_y = y;
eleni@0 96 }
eleni@0 97
eleni@0 98 void motion(int x, int y)
eleni@0 99 {
eleni@0 100 int dx = x - prev_x;
eleni@0 101 int dy = y - prev_y;
eleni@0 102 prev_x = x;
eleni@0 103 prev_y = y;
elene@6 104
elene@6 105 if(dx != 0) {
elene@6 106 cur_z = (float)x / (float)win_xsz;
elene@6 107 glutPostRedisplay();
elene@6 108 }
eleni@0 109 }
eleni@1 110
eleni@1 111 bool init()
eleni@1 112 {
elene@6 113 vol = new Volume;
elene@6 114 if(!vol->load("data/test1.vol")) {
elene@6 115 fprintf(stderr, "Failed to load test1.vol");
eleni@1 116 return false;
eleni@1 117 }
elene@6 118 cur_z = 0.5;
eleni@1 119
eleni@1 120 return true;
eleni@1 121 }