Android OpenGL 通用模型

写出一个OpenGL ES应用的通用框架。

创建一个新的Android 项目:OpenGLESTutorial, 在项目在添加两个类TutorialPartI.java 和OpenGLRenderer.java.

具体代码如下：

TutorialPartI.java

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public class TutorialPartI extends Activity {  // Called when the activity is first created.  @Override  public void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  this.requestWindowFeature(Window.FEATURE_NO_TITLE); // (NEW)  getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,  WindowManager.LayoutParams.FLAG_FULLSCREEN); // (NEW)    GLSurfaceView view = new GLSurfaceView(this);  view.setRenderer(new OpenGLRenderer());  setContentView(view);  } }

OpenGLRenderer.java

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public class OpenGLRenderer implements Renderer {    public void onSurfaceCreated(GL10 gl, EGLConfig config) {  // Set the background color to black ( rgba ).  gl.glClearColor(0.0f, 0.0f, 0.0f, 0.5f);  // OpenGL docs.  // Enable Smooth Shading, default not really needed.  gl.glShadeModel(GL10.GL_SMOOTH);// OpenGL docs.  // Depth buffer setup.  gl.glClearDepthf(1.0f);// OpenGL docs.  // Enables depth testing.  gl.glEnable(GL10.GL_DEPTH_TEST);// OpenGL docs.  // The type of depth testing to do.  gl.glDepthFunc(GL10.GL_LEQUAL);// OpenGL docs.  // Really nice perspective calculations.  gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, // OpenGL docs.  GL10.GL_NICEST);  }    public void onDrawFrame(GL10 gl) {  // Clears the screen and depth buffer.  gl.glClear(GL10.GL_COLOR_BUFFER_BIT | // OpenGL docs.  GL10.GL_DEPTH_BUFFER_BIT);  }    public void onSurfaceChanged(GL10 gl, int width, int height) {  // Sets the current view port to the new size.  gl.glViewport(0, 0, width, height);// OpenGL docs.  // Select the projection matrix  gl.glMatrixMode(GL10.GL_PROJECTION);// OpenGL docs.  // Reset the projection matrix  gl.glLoadIdentity();// OpenGL docs.  // Calculate the aspect ratio of the window  GLU.gluPerspective(gl, 45.0f,  (float) width / (float) height,  0.1f, 100.0f);  // Select the modelview matrix  gl.glMatrixMode(GL10.GL_MODELVIEW);// OpenGL docs.  // Reset the modelview matrix  gl.glLoadIdentity();// OpenGL docs.  } }

编译后运行，屏幕显示一个黑色的全屏。这两个类定义了Android OpenGL ES应用的最基本的类和方法，可以看作是OpenGL ES的”Hello ,world”应用，后面将逐渐丰富这个例子来画出3D图型