cutting out a surface; think drawing windows in a house

OpenGL OpenGL: Basic Coding
1

Hi,

I want to draw a house with, not surprisingly, windows. Now, thinking the house simply as a rectangular prism, how should I cut out the surface for windows?

Thanks!!

2

Instead of drawing one quad for each wall imagine that you split each wall into 3x3 grid of quads. Now remove the middle quad and you’re done.

3

I have the same problem, but the window should be opened at random place on the wall, and the window size is random too. how to do?
thanks!

4

dynamically change the way you split the wall into a (irregular) grid.