Multiple Viewport problems

I’m trying to get multiple viewports in a single window. In my Display function, I’m doing this:
wWindow = width of window
hWindow = height of window

for(int n=0; n<2; n++)
	{
		if (n==0)													
		{
			
			glViewport (0, wWindow/2, hWindow/2, wWindow/2);
			glScissor (0, wWindow/2, hWindow/2, wWindow/2);
			glMatrixMode (GL_PROJECTION);								
			glLoadIdentity ();											
			gluPerspective( 10.0, wWindow/hWindow, 0.1f, 500.0 );
			RenderObjects();	
		}
		if (n==1)													
		{
			glViewport (0, 0, hWindow/2, wWindow/2);
			glScissor (0, 0, hWindow/2, wWindow/2);
			glMatrixMode (GL_PROJECTION);								
			glLoadIdentity ();											
			gluPerspective( 100.0, wWindow/hWindow, 0.1f, 250.0 );
			RenderObjects();
		}
	}

When I do this, there is only one viewport being created (in the bottom left). I’m not sure what’s wrong. Any insight would be awesome, cheers!

glScissor is not really necessary and won’t be doing anything if you have not enabled it; but I can’t see an obvious error. Try using the same perspective matrix in both views in case the objects are just too small to see in the top view

Thanks for the feedback.

Follow up: I fixed the problem by moving the code into the Idle function and removing the for loop. Not sure why it wasn’t working in the Display