Android开发之OpenGL ES教程.doc

OpenGL ES Tutorial for Android – Part I Im going to write a couple of tutorials on using OpenGL ES on Android phones. The theory of OpenGL ES is the same on different devices so it should be quite easy to convert them to another platform. I cant always remember where I found particular info so I might not always be able to give you the right reference. If you feel that I have borrowed stuff from you but have forgotten to add you as a reference, please e-mail me. In the code examples I will have two different links for each function. The actual function will be linked to the android documentation and after that I will also link the OpenGL documentations. Like this: gl.glClearColor(0.0f, 0.0f, 0.0f, 0.5f); // OpenGL docs. So, lets start. In this tutorial I will show you how to set up your OpenGL ES view that’s always a good place to start. Setting up an OpenGL ES View Setting up a OpenGL view has never been hard and on Android it is still easy. There really are only two things you need to get started. GLSurfaceView GLSurfaceView is a API class in Android 1.5 that helps you write OpenGL ES applications. Providing the glue code to connect OpenGL ES to the View system. Providing the glue code to make OpenGL ES work with the Activity life-cycle. Making it easy to choose an appropriate frame buffer pixel format. Creating and managing a separate rendering thread to enable smooth animation. Providing easy-to-use debugging tools for tracing OpenGL ES API calls and checking for errors. If you want to get going fast with your OpenGL ES application this is where you should start. The only function you need to call on is: public void setRenderer(GLSurfaceView.Renderer renderer) Read more at: GLSurfaceView GLSurfaceView.Renderer GLSurfaceView.Renderer is a generic render interface. In your implementation of this renderer you should put all your calls to render a frame.There are three functions to implement: // Called when the surface is created or recreated. public void onS