EDIT: Originally I posted this problem without digging into it and have found out where the problem stems from and what the effects are.

The problem is simply initial textures are not appearing on the screen. Anything that would be attached during the activity launch, for example a background image, would be invisible. It is apparent that the sprites are being drawn, the resources are just missing.

After some snooping around I've come up with some behaviour that I'm sure is the cause of this problem. Here's a link to the post regarding what I've come up with so far for this problem: http://www.andengine.org/forums/gles2/resume-activity-no-texture-reload-maybe-a-bug-t6167.html#p27523

Hello there. Sometimes it occurs that in BaseGameActivity this part here:

@Override
   public void onResumeGame() {
      Debug.d(this.getClass().getSimpleName() + ".onResumeGame" + " @(Thread: '" + Thread.currentThread().getName() + "')");

      this.mEngine.start();

      this.mGamePaused = false;
   }

is being executed without mEngine being initialized (at game startup).

sake

Someone sent me that error report of my game (Juggle The Doodle):

org.andengine.opengl.shader.exception.ShaderProgramException: Unexpected uniform: 'u_modelViewProjectionMatrix'. at org.andengine.opengl.shader.ShaderProgram.getUniformLocation(ShaderProgram.java:99) at org.andengine.opengl.shader.PositionColorTextureCoordinatesShaderProgram.link(PositionColorTextureCoordinatesShaderProgram.java:83) at org.andengine.opengl.shader.ShaderProgram.compile(ShaderProgram.java:149) at org.andengine.opengl.shader.ShaderProgram.bind(ShaderProgram.java:122) at org.andengine.opengl.shader.PositionColorTextureCoordinatesShaderProgram.bind(PositionColorTextureCoordinatesShaderProgram.java:89) at org.andengine.opengl.vbo.VertexBufferObject.bind(VertexBufferObject.java:150) at org.andengine.entity.sprite.Sprite.preDraw(Sprite.java:175) at org.andengine.entity.Entity.onManagedDraw(Entity.java:1181) at org.andengine.entity.shape.Shape.onManagedDraw(Shape.java:123) at org.andengine.entity.Entity.onDraw(Entity.java:1009) at org.andengine.entity.Entity.onManagedDrawChildren(Entity.java:1203) at org.andengine.entity.Entity.onDrawChildren(Entity.java:1195) at org.andengine.entity.Entity.onManagedDraw(Entity.java:1185) at org.andengine.entity.scene.Scene.onManagedDraw(Scene.java:262) at org.andengine.entity.Entity.onDraw(Entity.java:1009) at org.andengine.entity.scene.Scene.onManagedDraw(Scene.java:269) at org.andengine.entity.Entity.onDraw(Entity.java:1009) at org.andengine.engine.Engine.onDrawScene(Engine.java:560) at org.andengine.engine.Engine.onDrawFrame(Engine.java:552) at org.andengine.opengl.view.EngineRenderer.onDrawFrame(EngineRenderer.java:104) at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1363) at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1118)

After loading a LWP and then returning to it from another activity the system seems to load the texture atlas' instead of the texture regions.

See video below for better description

http://www.youtube.com/watch?v=irW__oCcM_0

Some time error: 04-19 09:09:29.755: E/Adreno200-ES20(21417): <qgl2DrvAPI_glTexImage2D:433>: GL_OUT_OF_MEMORY

how to fix it ! Thank you...............

The Text examples in GLES1 examples all crash because of the bug found here:

http://stackoverflow.com/questions/7607877/stackoverflow-when-trying-to-run-the-text-example-in-the-andengineexamplelaunche

I understand that GLES1 is probably closed, but 90% of the android market is Android 2.1 or lower, so many people still use the GLES1 branch. Please add the bug fix.

This occurs on particular devices. I'm guessing the native library for the chipset can't be found? It's not proguard or anything like that, it's a native library not being found.

These are the devices I've found so far: Fujitsu Toshiba REGZA Phone T01C(tg03)

Pantech Vega X(ef14l) Pantech IS06(jmasai)

And here's the stack trace: java.lang.ExceptionInInitializerError at org.andengine.opengl.vbo.HighPerformanceVertexBufferObject.onBufferData(SourceFile:71) at org.andengine.opengl.vbo.VertexBufferObject.bind(SourceFile:152) at org.andengine.entity.sprite.Sprite.preDraw(SourceFile:170) at org.andengine.entity.Entity.onManagedDraw(SourceFile:1227) at org.andengine.entity.Entity.onDraw(SourceFile:1033) at org.andengine.entity.Entity.onManagedDraw(SourceFile:1256) at org.andengine.entity.scene.Scene.onManagedDraw(SourceFile:262) at org.andengine.entity.Entity.onDraw(SourceFile:1033) at org.andengine.engine.camera.Camera.onDrawHUD(SourceFile:268) at org.andengine.engine.Engine.onDrawFrame(SourceFile:589) at org.andengine.opengl.view.EngineRenderer.onDrawFrame(SourceFile:104) at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1334) at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1118) Caused by: java.lang.UnsatisfiedLinkError: Library andengine not found at java.lang.Runtime.loadLibrary(Runtime.java:461) at java.lang.System.loadLibrary(System.java:557) at org.andengine.opengl.util.BufferUtils.(SourceFile:17) ... 13 more java.lang.UnsatisfiedLinkError: Library andengine not found at java.lang.Runtime.loadLibrary(Runtime.java:461) at java.lang.System.loadLibrary(System.java:557) at org.andengine.opengl.util.BufferUtils.(SourceFile:17) at org.andengine.opengl.vbo.HighPerformanceVertexBufferObject.onBufferData(SourceFile:71) at org.andengine.opengl.vbo.VertexBufferObject.bind(SourceFile:152) at org.andengine.entity.sprite.Sprite.preDraw(SourceFile:170) at org.andengine.entity.Entity.onManagedDraw(SourceFile:1227) at org.andengine.entity.Entity.onDraw(SourceFile:1033) at org.andengine.entity.Entity.onManagedDraw(SourceFile:1256) at org.andengine.entity.scene.Scene.onManagedDraw(SourceFile:262) at org.andengine.entity.Entity.onDraw(SourceFile:1033) at org.andengine.engine.camera.Camera.onDrawHUD(SourceFile:268) at org.andengine.engine.Engine.onDrawFrame(SourceFile:589) at org.andengine.opengl.view.EngineRenderer.onDrawFrame(SourceFile:104) at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1334) at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1118)

There is a problem when ClipEntities are being nested- it is caused by not restoring glScissor rect properly (test bit is restored, scissor rect is not).

It can be solved by:

• pushing "ScissorData" to a stack before (so it is available for anyone to be restored)

            /* Draw children, etc... */
            super.onManagedDraw(pGLState, pCamera);

• popping ScissorData out of the stack
• peeking stack and restoring scissors to value that was peeked

I have this stack currently sitting static in my ClipEntity just to prove that it works, but I'm guessing that it should be kept in GLState like this:

public void applyScissors(ScissorData pScissorData) {
   mScissorsStack.push(pScissorData);
   GLES20.glScissor(pScissorData.minX, pScissorData.minY, pScissorData.width, pScissorData.height);
}

public void restoreScissors() {
    mScissorsStack.pop();
    if (!mScissorsStack.isEmpty()) {
        ScissorData oldScissor = mScissorsStack.peek();
        GLES20.glScissor(oldScissor.minX, oldScissor.minY, oldScissor.width, oldScissor.height);
    }
}

If there is something you're willing to pull- let me know. If that's something you want to fix on your own- please do :)

Added ability to draw Entity's children behind the parent. Default is false, so it doesn't change the normal behavior.

New methods are setDrawChildrenBehindParent(boolean) and isDrawChildrenBehindParent

Unfortunately I wasn't able to add these to the IEntity interface because BaseMenuItemDecorator extends also from IEntity and there these methods probably don't make no sense.

Drawing children behind parent is used a lot in our project and I've seen several requests for that feature in the forums for the previous AndEngine.

Hello there,

I've switched back to the GLES2 version and now that ChangeableText is gone, I am using Text, but this seems to make the game crash. I don't know when and why, but I will investigate if it's not a misusage of Text that causes crashing. Or to make it precise: Should setText(...) be used on Text objects? Because I get an ArrayIndexOutOfBounds Exception because of that.

01-28 20:47:40.453: E/AndroidRuntime(29893): FATAL EXCEPTION: UpdateThread 01-28 20:47:40.453: E/AndroidRuntime(29893): java.lang.ArrayIndexOutOfBoundsException 01-28 20:47:40.453: E/AndroidRuntime(29893): at org.andengine.entity.text.Text$HighPerformanceTextVertexBufferObject.onUpdateVertices(Text.java:543) 01-28 20:47:40.453: E/AndroidRuntime(29893): at org.andengine.entity.text.Text.onUpdateVertices(Text.java:330) 01-28 20:47:40.453: E/AndroidRuntime(29893): at org.andengine.entity.text.Text.setText(Text.java:226) 01-28 20:47:40.453: E/AndroidRuntime(29893): at de.hotware.blockbreaker.android.BlockBreakerActivity$2.onTimePassed(BlockBreakerActivity.java:331) 01-28 20:47:40.453: E/AndroidRuntime(29893): at org.andengine.engine.handler.timer.TimerHandler.onUpdate(TimerHandler.java:83) 01-28 20:47:40.453: E/AndroidRuntime(29893): at org.andengine.engine.handler.UpdateHandlerList.onUpdate(UpdateHandlerList.java:47) 01-28 20:47:40.453: E/AndroidRuntime(29893): at org.andengine.entity.Entity.onManagedUpdate(Entity.java:1269) 01-28 20:47:40.453: E/AndroidRuntime(29893): at org.andengine.entity.scene.Scene.onManagedUpdate(Scene.java:286) 01-28 20:47:40.453: E/AndroidRuntime(29893): at org.andengine.entity.Entity.onUpdate(Entity.java:1040) 01-28 20:47:40.453: E/AndroidRuntime(29893): at org.andengine.engine.Engine.onUpdateScene(Engine.java:563) 01-28 20:47:40.453: E/AndroidRuntime(29893): at org.andengine.engine.Engine.onUpdate(Engine.java:558) 01-28 20:47:40.453: E/AndroidRuntime(29893): at org.andengine.engine.Engine.onTickUpdate(Engine.java:520) 01-28 20:47:40.453: E/AndroidRuntime(29893): at org.andengine.engine.Engine$UpdateThread.run(Engine.java:784)

I've pulled the latest commit and don't seem to have BuildConfig. I did a google search and saw something about building with ADT 17+, which I am, but don't really see how that affects the issue of the missing class...

I know, that project development is stopped, but I need fix a legacy code: draw Vignette effect programmatically on the sprite. I started from adaptation this shader: https://github.com/mattdesl/lwjgl-basics/wiki/ShaderLesson3 without sepia and other effects, but still not know, how to pass "resolution" vector analog. Currently, I'm passing sprite's width & height, but result light spot is not on center. Maybe, there are some another way to get normalized texture coordinates? Shader is copied from PositionColorTextureCoordinatesShaderProgram Fragment shader is defined as follows:

"precision lowp float;\n" +
                "uniform sampler2D " + ShaderProgramConstants.UNIFORM_TEXTURE_0 + ";\n" +
                "uniform vec2 " + ShaderProgramConstants.UNIFORM_RESOLUTION + ";\n" +
                "varying lowp vec4 " + ShaderProgramConstants.VARYING_COLOR + ";\n" +
                "varying mediump vec2 " + ShaderProgramConstants.VARYING_TEXTURECOORDINATES + ";\n" +
                "void main() {\n" +
                "vec2 position = (gl_FragCoord.xy / " + ShaderProgramConstants.UNIFORM_RESOLUTION + ".xy) - vec2(0.5);" +
                "float dist = length(position);" +
                "float vignette = smoothstep(0.5, 0.01, dist);" +
                "vec4 texColor = texture2D(" + ShaderProgramConstants.UNIFORM_TEXTURE_0 + ", " + ShaderProgramConstants.VARYING_TEXTURECOORDINATES + ");" +
                "texColor.rgb = mix(texColor.rgb, texColor.rgb * vignette, 0.5);" +
                "gl_FragColor = " + ShaderProgramConstants.VARYING_COLOR + " * texColor;\n" +
                "}"

where UNIFORM_RESOLUTION is 2d array with sprite width & height bound. Maybe, I have to pass another values here?

Since upgrading the app to SDK 28 it seems that the 3dot overflow menu is not showing up and therefore i lost the menu in my app. Appreciate any suggestions to rectify this issue ?

here is my code

package com.example.myapplication2;

import org.andengine.engine.camera.Camera; import org.andengine.engine.options.EngineOptions; import org.andengine.engine.options.ScreenOrientation; import org.andengine.engine.options.resolutionpolicy.RatioResolutionPolicy; import org.andengine.entity.modifier.MoveModifier; import org.andengine.entity.scene.Scene; import org.andengine.entity.scene.background.Background; import org.andengine.entity.scene.menu.MenuScene; import org.andengine.entity.scene.menu.MenuScene.IOnMenuItemClickListener; import org.andengine.entity.scene.menu.item.IMenuItem; import org.andengine.entity.scene.menu.item.SpriteMenuItem; import org.andengine.entity.sprite.Sprite; import org.andengine.entity.util.FPSLogger; import org.andengine.opengl.texture.TextureOptions; import org.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlas; import org.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlasTextureRegionFactory; import org.andengine.opengl.texture.region.ITextureRegion; import org.andengine.ui.activity.SimpleBaseGameActivity;

import android.opengl.GLES20; import android.view.KeyEvent;

import android.view.Menu; import android.view.MenuInflater;

/**

• (c) 2010 Nicolas Gramlich

• (c) 2011 Zynga

• @author Nicolas Gramlich

• @since 01:30:15 - 02.04.2010 */ public class MainActivity extends SimpleBaseGameActivity implements IOnMenuItemClickListener { // =========================================================== // Constants // ===========================================================

  private static final int CAMERA_WIDTH = 720; private static final int CAMERA_HEIGHT = 480;

  protected static final int MENU_RESET = 0; protected static final int MENU_QUIT = MENU_RESET + 1;

  // =========================================================== // Fields // ===========================================================

  protected Camera mCamera;

  protected Scene mMainScene;

  private BitmapTextureAtlas mBitmapTextureAtlas; private ITextureRegion mFaceTextureRegion;

  protected MenuScene mMenuScene;

  private BitmapTextureAtlas mMenuTexture; protected ITextureRegion mMenuResetTextureRegion; protected ITextureRegion mMenuQuitTextureRegion;

  // =========================================================== // Constructors // ===========================================================

  // =========================================================== // Getter & Setter // ===========================================================

  // =========================================================== // Methods for/from SuperClass/Interfaces // ===========================================================

  @Override public EngineOptions onCreateEngineOptions() { this.mCamera = new Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT);

   return new EngineOptions(true, ScreenOrientation.LANDSCAPE_FIXED, new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT), this.mCamera);
  

  }

  @Override public void onCreateResources() { BitmapTextureAtlasTextureRegionFactory.setAssetBasePath("gfx/");

   this.mBitmapTextureAtlas = new BitmapTextureAtlas(this.getTextureManager(), 64, 64, TextureOptions.BILINEAR);
   this.mFaceTextureRegion = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mBitmapTextureAtlas, this, "menu_back.png", 0, 0);
   this.mBitmapTextureAtlas.load();
  
   this.mMenuTexture = new BitmapTextureAtlas(this.getTextureManager(), 256, 128, TextureOptions.BILINEAR);
   this.mMenuResetTextureRegion = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mMenuTexture, this, "menu_reset.png", 0, 0);
   this.mMenuQuitTextureRegion = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mMenuTexture, this, "menu_quit.png", 0, 50);
   this.mMenuTexture.load();
  

  }

  @Override public Scene onCreateScene() { this.mEngine.registerUpdateHandler(new FPSLogger());

   this.createMenuScene();
  
   /* Just a simple scene with an animated face flying around. */
   this.mMainScene = new Scene();
   this.mMainScene.setBackground(new Background(0.09804f, 0.6274f, 0.8784f));
  
   final Sprite face = new Sprite(0, 0, this.mFaceTextureRegion, this.getVertexBufferObjectManager());
   face.registerEntityModifier(new MoveModifier(30, 0, CAMERA_WIDTH - face.getWidth(), 0, CAMERA_HEIGHT - face.getHeight()));
   this.mMainScene.attachChild(face);
  
   return this.mMainScene;
  

  }

  @Override public boolean onKeyDown(final int pKeyCode, final KeyEvent pEvent) { if(pKeyCode == KeyEvent.KEYCODE_MENU && pEvent.getAction() == KeyEvent.ACTION_DOWN) { if(this.mMainScene.hasChildScene()) { /* Remove the menu and reset it. / this.mMenuScene.back(); } else { / Attach the menu. */ this.mMainScene.setChildScene(this.mMenuScene, false, true, true); } return true; } else { return super.onKeyDown(pKeyCode, pEvent); } }

  @Override public boolean onMenuItemClicked(final MenuScene pMenuScene, final IMenuItem pMenuItem, final float pMenuItemLocalX, final float pMenuItemLocalY) { switch(pMenuItem.getID()) { case MENU_RESET: /* Restart the animation. */ this.mMainScene.reset();

           /* Remove the menu and reset it. */
           this.mMainScene.clearChildScene();
           this.mMenuScene.reset();
           return true;
       case MENU_QUIT:
           /* End Activity. */
           this.finish();
           return true;
       default:
           return false;
   }
  

  }

  // =========================================================== // Methods // ===========================================================

  protected void createMenuScene() { this.mMenuScene = new MenuScene(this.mCamera);

   final SpriteMenuItem resetMenuItem = new SpriteMenuItem(MENU_RESET, this.mMenuResetTextureRegion, this.getVertexBufferObjectManager());
   resetMenuItem.setBlendFunction(GLES20.GL_SRC_ALPHA, GLES20.GL_ONE_MINUS_SRC_ALPHA);
   this.mMenuScene.addMenuItem(resetMenuItem);
  
   final SpriteMenuItem quitMenuItem = new SpriteMenuItem(MENU_QUIT, this.mMenuQuitTextureRegion, this.getVertexBufferObjectManager());
   quitMenuItem.setBlendFunction(GLES20.GL_SRC_ALPHA, GLES20.GL_ONE_MINUS_SRC_ALPHA);
   this.mMenuScene.addMenuItem(quitMenuItem);
  
   this.mMenuScene.buildAnimations();
  
   this.mMenuScene.setBackgroundEnabled(false);
  
   this.mMenuScene.setOnMenuItemClickListener(this);
  

  }

  @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.menu, menu);

   return super.onCreateOptionsMenu(menu);
  

  }

  /* @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.action_settings: // Do something

           return true;
       default:
           return super.onOptionsItemSelected(item);
   }
  

  }*/

  // =========================================================== // Inner and Anonymous Classes // =========================================================== }

I have added some codes to source of andengine to support Farsi (Persian) language and it is working excellent. It supports Farsi in text object. if i can help to andengine I'm ready to send the codes. Regards, K.Najafi

java.lang.ArrayIndexOutOfBoundsException: length=0; index=0
at org.andengine.entity.scene.Scene.onAreaTouchEvent(Scene.java:406)
at org.andengine.entity.scene.Scene.onSceneTouchEvent(Scene.java:357)
at org.andengine.entity.scene.Scene.onChildSceneTouchEvent(Scene.java:420)
at org.andengine.entity.scene.CameraScene.onChildSceneTouchEvent(CameraScene.java:84)
at org.andengine.entity.scene.Scene.onSceneTouchEvent(Scene.java:338)
at org.andengine.entity.scene.CameraScene.onSceneTouchEvent(CameraScene.java:64)
at org.andengine.engine.Engine.onTouchHUD(Engine.java:444)
at org.andengine.engine.Engine.onTouchEvent(Engine.java:434)
at org.andengine.input.touch.controller.BaseTouchController$TouchEventRunnablePoolItem.run
(BaseTouchController.java:102)
 at org.andengine.util.adt.pool.RunnablePoolUpdateHandler.onHandlePoolItem
(RunnablePoolUpdateHandler.java:54)
at org.andengine.util.adt.pool.RunnablePoolUpdateHandler.onHandlePoolItem(
RunnablePoolUpdateHandler.java:12)
at org.andengine.util.adt.pool.PoolUpdateHandler.onUpdate(PoolUpdateHandler.java:88)
at org.andengine.input.touch.controller.BaseTouchController.onUpdate(BaseTouchController.java:62)
at org.andengine.engine.Engine.onUpdate(Engine.java:584)
at org.andengine.engine.LimitedFPSEngine.onUpdate(LimitedFPSEngine.java:56)
at org.andengine.engine.Engine.onTickUpdate(Engine.java:548)
at org.andengine.engine.Engine$UpdateThread.run(Engine.java:820)