glut multiple windows general

OpenGL OpenGL: Basic Coding
1

when i create 3 windows using glut like this

  for(int i=0;i<3;i++){
    glutInitWindowSize(300,300);
    glutInitWindowPosition(310*i,0);
    int x = glutCreateWindow("View");
    winid[i]=x;
  }

it will create the 3 windows… but if i try to select one, by doing

glutSetWindow(winid[0]);

it will not work… the only window that can be accessed is the last one created. is there some sort of initialization so there can be more than one window?

2

Try setting each window after it’s created, then set your callbacks. Works fine for me, though I’ve not really played with it much.
http://www.opengl.org/resources/libraries/glut/spec3/spec3.html

3

im not sure i understand exactly what you mean… do you mean

  for(int i=0;i<3;i++){
    glutInitWindowSize(300,300);
    glutInitWindowPosition(310*i,0);
    int x = glutCreateWindow("View");
    winid[i]=x;
    glutSetWindow(winid[0]);  
  }
4

Pretty much, but you need to supply callbacks for each window you create.

for( int i = 0; i < 3; i++ )
{    
    glutInitWindowSize(300,300);    
    glutInitWindowPosition(310*i,0);    
    glutCreateWindow("View");    
	
    glutReshapeFunc( reshape );
    glutDisplayFunc( display );
    // ...
}