I tried to learn openGL ES from the official android tutorial, which is subtly broken all over the place. It works but shouldn't. The funny thing is that when I

I tried to learn openGL ES from the official android tutorial, which is subtly broken all over the place. It works but shouldn't. The funny thing is that when I googled it, there were lots of complaints about it being broken, and the author responded and fixed them... but years before... I eventually got things working, though I feel far from confident about openGL ES. Actually, embedded shader code, packed arrays, limited debugging and my rusty matrix algebra doesn't make it easy.