How can I draw a cube with a depth buffer in OpenGL ES 2.0?

I've been trying to draw a cube without success using OpenGL ES 2.0 and a depth buffer.

Are there any 开发者_JS百科examples of this available that I could compare against to see where I'm going wrong?

As an example for a recent class, I created a sample application that draws a textured cube using both OpenGL ES 1.1 and 2.0, which can be downloaded from here. Unfortunately, that application does not use a depth buffer for anything.

I created a more complex OpenGL ES 2.0 application that does use one here, so you might be able to pull code from this one into the other to accomplish what you want.