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public class Shaders {
    public static final String COLOR_VERTEX_SHADER =
        "uniform mat4 uMVPMatrix;\n" +
        "attribute vec4 vPosition;\n" +
        "void main() {\n" +
        "  gl_Position = uMVPMatrix * vPosition;\n" +
        "  gl_PointSize = 10.0;\n" +
        "}";

    public static final String COLOR_FRAGMENT_SHADER =

framundo

public abstract class Model3D {

    private Integer mProgram;
    private int mColorHandle;

    private float[] mColor;
    private String mVertexShader;
    private String mFragmentShader;

    private void setupShaders() {

framundo

public class GLHelper {

    private static final String TAG = "GLHelper";

    public static void checkGlError(String glOperation) {
        int error;
        while ((error = GLES20.glGetError()) != GLES20.GL_NO_ERROR) {
            Log.e(TAG, glOperation + ": glError " + error);
            throw new RuntimeException(glOperation + ": glError " + error);
        }

framundo

public class GLCameraOptions {
    public float eyeX;
    public float eyeY;
    public float eyeZ;
    public float centerX;
    public float centerY;
    public float centerZ;
    public float upX;
    public float upY;
    public float upZ;

framundo

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent">

    <ar.com.wolox.easygl.view.EasyGLView
        android:id="@+id/easygl"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</FrameLayout>

framundo

public class ExampleFragment extends Fragment {

    private EasyGLView mEasyGLView;
    private BasicGLRenderer mBasicRenderer;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        ViewGroup viewGroup = (ViewGroup) inflater.inflate(R.layout.fragment_example, container, false);
        mEasyGLView = (EasyGLView) viewGroup.findViewById(R.id.easygl);

framundo

public class EasyGLView extends GLSurfaceView {

    public EasyGLView(Context context) {
        super(context);
        init();
    }

    public EasyGLView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();

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public class BasicGLRenderer implements GLSurfaceView.Renderer {

    ...
    private List<Model3D> mModels = new LinkedList<>();

    @Override
    public void onDrawFrame(GL10 gl) {
        ...
        for(Model3D model : mModels) {
            model.draw(mMVPMatrix);

framundo

public class BasicGLRenderer implements GLSurfaceView.Renderer {

    private final GLCameraOptions mGLCameraOptions;
    private int mBackgroundColor;
    private float[] mViewMatrix = new float[16];
    private float[] mMVPMatrix = new float[16];
    private float[] mProjectionMatrix = new float[16];

    public BasicGLRenderer(GLCameraOptions glCameraOptions) {
        mGLCameraOptions = glCameraOptions;

framundo

...
  <uses-feature android:glEsVersion="0x00020000" android:required="true" />
...