There are tons of tutorials about OpenGL ES 2.0, but this one is the best. Thank you Ray, I use what I learned from your tutorial and made a RPG game render example, if someone who also learned OpenGL ES 2.0 from this article and want to make a game based on this tutorial but have no idea how to start, maybe can have a look at my example: https://github.com/huxingyi/libphone/tree/master/samples/rpggame#overview