Zoom multiple sprites, individually on touch-Andengine - sprite

Question

I am very new to andEngine, I want to add sprites on screen and let them move and zoom on finger touch.
Right now i am able to add multiple sprites on scene , and they can be dragged on touch.
Here is my code:
public class Main extends SimpleBaseGameActivity {
#Override
private Camera camera;
private BitmapTextureAtlas mBitmapTextureAtlas;
private ITextureRegion mFaceTextureRegion;
private ITextureRegion mFaceTextureRegion2;
private static final int CAMERA_WIDTH = 800;
private static final int CAMERA_HEIGHT = 480;
#Override
public EngineOptions onCreateEngineOptions() {
camera = new Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT);
EngineOptions engineOptions = new EngineOptions(true,
ScreenOrientation.LANDSCAPE_FIXED, new RatioResolutionPolicy(
CAMERA_WIDTH, CAMERA_HEIGHT), camera);
return engineOptions;
}
#Override
protected void onCreateResources() {
BitmapTextureAtlasTextureRegionFactory.setAssetBasePath("gfx/");
this.mBitmapTextureAtlas = new BitmapTextureAtlas(
this.getTextureManager(), 1024, 1600, TextureOptions.NEAREST);
// background
// this.background = new Sprite(0, 0,
// BitmapTextureAtlasTextureRegionFactory.createTiledFromAsset(this.mBitmapTextureAtlas,
// this, "ui_ball_1.png", 0, 0, 1, 1),
// this.getVertexBufferObjectManager());
this.mFaceTextureRegion = BitmapTextureAtlasTextureRegionFactory
.createFromAsset(this.mBitmapTextureAtlas, this,
"ui_ball_1.png", 0, 0);
this.mFaceTextureRegion2 = BitmapTextureAtlasTextureRegionFactory
.createFromAsset(this.mBitmapTextureAtlas, this,
"ui_ball_1.png", 0, 0);
this.mBitmapTextureAtlas.load();
// this.mEngine.getTextureManager().loadTexture(this.mBitmapTextureAtlas);
/*
* this.mBitmapTextureAtlas = new
* BitmapTextureAtlas(this.getTextureManager(), 32, 32,
* TextureOptions.BILINEAR); this.mFaceTextureRegion =
* BitmapTextureAtlasTextureRegionFactory
* .createFromAsset(this.mBitmapTextureAtlas, this, "ui_ball_1.png", 0,
* 0); this.mBitmapTextureAtlas.load();
*/
}
#Override
protected Scene onCreateScene() {
/*
* this.scene = new Scene(); this.scene.attachChild(this.background);
* this.scene.setBackground(new Background(0.09804f, 0.6274f, 0.8784f));
* return this.scene;
*/
this.mEngine.registerUpdateHandler(new FPSLogger());
final Scene scene = new Scene();
scene.setBackground(new Background(0.09804f, 0.6274f, 0.8784f));
final float centerX = (CAMERA_WIDTH - this.mFaceTextureRegion
.getWidth()) / 2;
final float centerY = (CAMERA_HEIGHT - this.mFaceTextureRegion
.getHeight()) / 2;
final Sprite face = new Sprite(centerX, centerY,
this.mFaceTextureRegion, this.getVertexBufferObjectManager()) {
#Override
public boolean onAreaTouched(final TouchEvent pSceneTouchEvent,
final float pTouchAreaLocalX, final float pTouchAreaLocalY) {
this.setPosition(pSceneTouchEvent.getX() - this.getWidth() / 2,
pSceneTouchEvent.getY() - this.getHeight() / 2);
return true;
}
};
face.setScale(2);
scene.attachChild(face);
scene.registerTouchArea(face);
final Sprite face2 = new Sprite(0, 0, this.mFaceTextureRegion2,
this.getVertexBufferObjectManager()) {
#Override
public boolean onAreaTouched(final TouchEvent pSceneTouchEvent,
final float pTouchAreaLocalX, final float pTouchAreaLocalY) {
this.setPosition(pSceneTouchEvent.getX() - this.getWidth() / 2,
pSceneTouchEvent.getY() - this.getHeight() / 2);
return true;
}
};
face2.setScale(2);
scene.attachChild(face2);
scene.registerTouchArea(face2);
scene.setTouchAreaBindingOnActionDownEnabled(true);
return scene;
}
}
Now i want to zoom each sprite on touch, but unable to find such method like setPosition available to move sprite to a specific position. Can anyone help me in achieving this without affecting the current functionality. Any help would be appreciated, may be in form of code or some direction/method to do this.
Thanks in advance :)

Answer 1

you can use a EntityModifier to make your effect:
#Override
public boolean onAreaTouched(final TouchEvent pSceneTouchEvent,
final float pTouchAreaLocalX, final float pTouchAreaLocalY) {
this.setPosition(pSceneTouchEvent.getX() - this.getWidth() / 2,
pSceneTouchEvent.getY() - this.getHeight() / 2);
this.clearEntityModifiers();
this.RegisterEntityModifier(new ScaleModifier(1f,2f,4f));
//1f = time to convert the scale of sprite of 2f to 4f
//2f = initial scale
//4f = finish scale
//when you dont touch the sprite back to normal scale
if(event.getAction()== MotionEvent.ACTION_UP) {
this.clearEntityModifiers();
this.RegisterEntityModifier(new ScaleModifier(1f,4f,2f));
}
//you also can work with "MotionEvent.ACTION_DOWN" and
//MotionEvent.ACTION_MOVE
return true;
}