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copied!<p>With your code, you seem to try to do collision checking with your sprites ?!</p> <p>It would be complicated and not nice when you try to do things without physics bodies. So lets use the physics bodies with your sprites. </p> <p>But note that, DO NOT create a solid box body for your area (containing your sprites), lets use 4 separated body walls (left, top, right, bottom) to form a closed box; because game engine can only check collision with solid shapes.</p> <p>The following is the code for reference:</p> <pre><code>/** * @param pScene * Sence of the game, get from class member * @param pWorld * physics world of the game, get from class member */ public void CreateSprites(final Scene pScene, final PhysicsWorld pWorld) { final FixtureDef mFixtureDef = PhysicsFactory.createFixtureDef(10, 1.1f, 0.0f);//should be placed as member of class final Sprite letterTwo = new Sprite(centerX - centerX / 2, centerY, this.mFaceTextureRegionLetterTwo, this.getVertexBufferObjectManager()); final Body letterTwoBody = PhysicsFactory.createBoxBody(pWorld, letterTwo, BodyType.DynamicBody, mFixtureDef); letterTwo.setUserData(letterTwoBody); // for later sprite-body attachment access pScene.attachChild(letterTwo); pWorld.registerPhysicsConnector(new PhysicsConnector(letterTwo, letterTwoBody, true, true)); } /** Create the walls, in these boudaries sprites will move */ public void InitBoxWalls(Scene pScene, PhysicsWorld pWorld) { final float WALL_MARGIN_WIDTH = 5f; final float WALL_MARGIN_HEIGHT = 10f; final VertexBufferObjectManager vertexBufferObjectManager = this.getVertexBufferObjectManager(); mWallGround = new Rectangle(-WALL_MARGIN_WIDTH, mCameraHeight + WALL_MARGIN_HEIGHT - 2, mCameraWidth + 2*WALL_MARGIN_WIDTH, 2, vertexBufferObjectManager); mWallRoof = new Rectangle(-WALL_MARGIN_WIDTH, -WALL_MARGIN_HEIGHT, mCameraWidth + 2*WALL_MARGIN_WIDTH, 2, vertexBufferObjectManager); mWallLeft = new Rectangle(-WALL_MARGIN_WIDTH, -WALL_MARGIN_HEIGHT, 2, mCameraHeight + 2*WALL_MARGIN_HEIGHT, vertexBufferObjectManager); mWallRight = new Rectangle(mCameraWidth + WALL_MARGIN_WIDTH - 2, -WALL_MARGIN_HEIGHT, 2, mCameraHeight + 2*WALL_MARGIN_HEIGHT, vertexBufferObjectManager); PhysicsFactory.createBoxBody(pWorld, mWallGround, BodyType.StaticBody, mWallFixtureDef); PhysicsFactory.createBoxBody(pWorld, mWallRoof, BodyType.StaticBody, mWallFixtureDef); PhysicsFactory.createBoxBody(pWorld, mWallLeft, BodyType.StaticBody, mWallFixtureDef); PhysicsFactory.createBoxBody(pWorld, mWallRight, BodyType.StaticBody, mWallFixtureDef); pScene.attachChild(mWallGround); pScene.attachChild(mWallRoof); pScene.attachChild(mWallLeft); pScene.attachChild(mWallRight); } </code></pre> <p>And the last thing you should do is to look up example of Physics/MouseJoint in AndEngine examples.</p>

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