171 lines
3.5 KiB
C++
171 lines
3.5 KiB
C++
#include <iostream>
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#include <fstream>
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#include <vector>
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#include <utility>
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#include <cstdio>
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#include <cstdlib>
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#ifdef __APPLE__
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#include <OpenGL/gl.h>
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#include <OpenGL/glu.h>
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#include <GLUT/glut.h>
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#else
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#include <GL/gl.h>
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#include <GL/glu.h>
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#include <GL/glut.h>
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#endif
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#include <glm/glm.hpp>
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using namespace std;
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static const char * APP_TITLE = "PhotonMF - Photon map viewer";
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// #define OUTPUT_REDIR
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#ifdef OUTPUT_REDIR
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static FILE * fout;
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static FILE * ferr;
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#endif
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static int w = 640;
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static int h = 480;
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static GLuint dlist;
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static vector<pair<glm::vec3, glm::vec3>> photons;
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void init_gl(void);
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void reshape(int _w, int _h);
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void keyboard(unsigned char key, int x, int y);
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void release_key(unsigned char key, int x, int y);
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void idle(void);
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void render_scene(void);
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void clean_up(void);
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void build_dlist() {
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dlist = glGenLists(1);
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glNewList(dlist, GL_COMPILE); {
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glBegin(GL_POINTS); {
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for (vector<pair<glm::vec3, glm::vec3>>::iterator it = photons.begin(); it != photons.end(); it++) {
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glColor3f((*it).second.r, (*it).second.g, (*it).second.b);
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glVertex3f((*it).first.x, (*it).first.y, (*it).first.z);
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}
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}
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glEnd();
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}
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glEndList();
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}
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int main(int argc, char ** argv) {
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#ifdef OUTPUT_REDIR
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fout = freopen("stdout.txt", "w", stdout);
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ferr = freopen("stderr.txt", "w", stderr);
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#endif
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if (argc < 2) {
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cerr << "USAGE: " << argv[0] << " FILE" << endl;
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return EXIT_FAILURE;
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}
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ifstream ifs(argv[1], ios::in);
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if (!ifs.is_open()) {
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cerr << "Failed to open the file " << argv[1] << " for reading." << endl;
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return EXIT_FAILURE;
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}
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while (!ifs.eof()) {
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float x, y, z, r, g, b;
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ifs >> x >> y >> z >> r >> g >> b;
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photons.push_back(pair<glm::vec3, glm::vec3>(glm::vec3(x, y, z), glm::vec3(r, g, b)));
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}
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ifs.close();
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glutInit(&argc, argv);
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glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH);
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glutInitWindowPosition(10, 10);
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glutInitWindowSize(w, h);
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glutCreateWindow(APP_TITLE);
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glutKeyboardFunc(keyboard);
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glutIdleFunc(idle);
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glutDisplayFunc(render_scene);
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glutReshapeFunc(reshape);
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atexit(clean_up);
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init_gl();
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glutMainLoop();
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return 0;
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}
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void init_gl(void) {
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/* Enable back-face culling. */
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glEnable(GL_CULL_FACE);
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glCullFace(GL_BACK);
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/* Enable lightning. */
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glEnable(GL_LIGHTING);
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glEnable(GL_LIGHT0);
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glEnable(GL_NORMALIZE);
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glShadeModel(GL_SMOOTH);
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/* Enable textures. */
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glEnable(GL_TEXTURE_2D);
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/* Enable Z-buffer. */
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glEnable(GL_DEPTH_TEST);
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glDepthMask(GL_TRUE);
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/* Set OpenGL state. */
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glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
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glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
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/* Hide the mouse pointer. */
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glutSetCursor(GLUT_CURSOR_NONE);
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build_dlist();
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}
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void reshape(int _w, int _h) {
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w = _w;
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h = _h;
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/* Recalculate projection matrix. */
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glViewport(0, 0, w, h);
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gluPerspective(90, ((float)w)/(h > 0.0f ? ((float)h) : 1.0f), 0.1, 1000);
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glTranslatef(0.0f, 0.0f, -1.0f);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glutPostRedisplay();
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}
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void keyboard(unsigned char key, int x, int y) {
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switch (key) {
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case 27:
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exit(0);
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break;
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}
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}
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void idle(void) {
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glutPostRedisplay();
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}
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void render_scene(void) {
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glClearColor(0.0, 0.0, 0.0, 1.0);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glLoadIdentity();
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glCallList(dlist);
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glFlush();
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glutSwapBuffers();
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}
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void clean_up(void) {
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glDeleteLists(dlist, 1);
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#ifdef OUTPUT_REDIR
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fclose(fout);
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fclose(ferr);
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#endif
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}
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