Integrating C++ OpenGL project with another C++ project -

i working project reads data file, performs calculations, , show results on standard output. later wanted give 3d graphical view results, made new opengl project shows data 3d object.

now problem is, can not figure out way integrate these 2 independent projects, because main() in opengl project goes in non terminating glutmainloop() loop, , unable figure out put loop in main() of first project !

/**** proj1 ****/ int main() {       while(esc key not pressed)     {         // read data file         // processing         // show results on standard output     } }   /**** proj2 ****/ int main() {     glutinit(&argc, argv);     init();     glutdisplayfunc(display);     glutkeyboardfunc(keyboard);     glutmousefunc(mouse);     glutidlefunc(idle);     glutmainloop(); } 

least mixing of codes between proj1 & proj2 requested. possible like:

/**** proj1 ****/ #include <filesfromproj2> int main() {     while(esc key not pressed)     {           // read data file           // processing           proj2.showresult(result)   // how ?     } } 

the simple solution ditch glut , use opengl windowing framework lets implement event loop. glfw immediate choice. instead of having opaque glutmainloop never returns instead call glfwpollevents beside your stdio processing.