how to correctly use touch listener/event and ease function in andEngine

Question

this touch event never fires. Ive been going through the examples and source codes and now am slightly confused on the best method of doing what i want.

I draw a sprite to the scene. I want that sprite to move with an EaseFunction to the coordinates of the users touch event.

this is the code so far:

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

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

private Camera mCamera;
private BitmapTextureAtlas mTexture;
private TextureRegion mFaceTextureRegion;
// ===========================================================
// Constructors
// ===========================================================

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

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

@Override
public Engine onLoadEngine() {
    this.mCamera = new Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT);
    return new Engine(new EngineOptions(true, ScreenOrientation.LANDSCAPE, new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT), this.mCamera));
}

@Override
public void onLoadResources() {
    this.mTexture = new BitmapTextureAtlas(64, 32, TextureOptions.BILINEAR);
    this.mFaceTextureRegion = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mTexture, this, "gfx/boxface.png", 0, 0);

    this.getEngine().getTextureManager().loadTexture(this.mTexture);
}

@Override
public Scene onLoadScene() {
    this.getEngine().registerUpdateHandler(new FPSLogger());

    final Scene scene = new Scene();
    scene.setBackground(new ColorBackground(0.09804f, 0.6274f, 0.8784f));

    final int x = (CAMERA_WIDTH - this.mFaceTextureRegion.getWidth()) / 2;
    final int y = (CAMERA_HEIGHT - this.mFaceTextureRegion.getHeight()) / 2;
    final Sprite face = new Sprite(x, y, this.mFaceTextureRegion);
    scene.attachChild(face);
    face.setPosition(134, 200);

//this is where I try to implement the touch listener and code//is it right?

    scene.setOnAreaTouchListener(new IOnAreaTouchListener() {
        //@Override
        public boolean onAreaTouched(TouchEvent pSceneTouchEvent,ITouchArea pTouchArea, float pTouchAreaLocalX,float pTouchAreaLocalY) {
            if(pSceneTouchEvent.isActionDown()) {
                int facePosX = (int) (pSceneTouchEvent.getX() - face.getWidth() / 2);
                int facePosY = (int) (pSceneTouchEvent.getY() - face.getHeight() / 2);

                face.registerEntityModifier(new MoveModifier(500, face.getX(), facePosX, face.getY(),facePosY,EaseQuadIn.getInstance())); 
            }
            return false;
        }
    });
    return scene;
}


@Override
public void onLoadComplete() {

}

finally im pretty sure i need to use pScene.registerTouchArea(face); and pScene.setTouchAreaBindingEnabled(true);

any clarification would be of great use. thank you

Answer 1

this works! just kept digging and found the answer here:http://www.andengine.org/forums/tutorials/touchevent-t1490.html

here is the completed code. the sprite loads to the center of the page. where ever you click the sprite will 'tween' or ease to your touch coordinates.

package and.engine.test;

import org.anddev.andengine.engine.Engine;
import org.anddev.andengine.engine.camera.Camera;
import org.anddev.andengine.engine.options.EngineOptions;
import org.anddev.andengine.engine.options.EngineOptions.ScreenOrientation;
import org.anddev.andengine.engine.options.resolutionpolicy.RatioResolutionPolicy;
import org.anddev.andengine.entity.util.FPSLogger;
import org.anddev.andengine.ui.activity.BaseGameActivity;
import org.anddev.andengine.entity.modifier.MoveModifier;
import org.anddev.andengine.entity.scene.Scene;
import org.anddev.andengine.util.modifier.ease.EaseQuadIn;
import org.anddev.andengine.entity.scene.Scene.IOnSceneTouchListener;
import org.anddev.andengine.entity.scene.background.ColorBackground;
import org.anddev.andengine.entity.sprite.Sprite;
import org.anddev.andengine.input.touch.TouchEvent;
import org.anddev.andengine.opengl.texture.TextureOptions;
import org.anddev.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlas;
import org.anddev.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlasTextureRegionFactory;
import org.anddev.andengine.opengl.texture.region.TextureRegion;



public class AndEnginetestActivity extends BaseGameActivity {
    // ===========================================================
    // Constants
    // ===========================================================

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

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

    private Camera mCamera;
    private BitmapTextureAtlas mTexture;
    private TextureRegion mFaceTextureRegion;
    // ===========================================================
    // Constructors
    // ===========================================================

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

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

    @Override
    public Engine onLoadEngine() {
        this.mCamera = new Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT);
        return new Engine(new EngineOptions(true, ScreenOrientation.LANDSCAPE, new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT), this.mCamera));
    }

    @Override
    public void onLoadResources() {
        this.mTexture = new BitmapTextureAtlas(64, 32, TextureOptions.BILINEAR);
        this.mFaceTextureRegion = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mTexture, this, "gfx/boxface.png", 0, 0);

        this.getEngine().getTextureManager().loadTexture(this.mTexture);
    }

    @Override
    public Scene onLoadScene() {
        this.getEngine().registerUpdateHandler(new FPSLogger());

        final Scene scene = new Scene();
        scene.setBackground(new ColorBackground(0.09804f, 0.6274f, 0.8784f));

        final int x = (CAMERA_WIDTH - this.mFaceTextureRegion.getWidth()) / 2;
        final int y = (CAMERA_HEIGHT - this.mFaceTextureRegion.getHeight()) / 2;
        final Sprite face = new Sprite(x, y, this.mFaceTextureRegion);
        scene.registerTouchArea(face);
        scene.attachChild(face);
        //face.setPosition(134, 200);

        scene.setOnSceneTouchListener(new IOnSceneTouchListener() {

            @Override
            public boolean onSceneTouchEvent(Scene pScene,TouchEvent pSceneTouchEvent) {
                int facePosX = (int) (pSceneTouchEvent.getX() - face.getWidth() / 2);
                int facePosY = (int) (pSceneTouchEvent.getY() - face.getHeight() / 2);
                 face.registerEntityModifier(new MoveModifier(1, face.getX(), facePosX,face.getY(), facePosY, EaseQuadIn.getInstance()));               
                 return false;
            }
        });


        scene.setTouchAreaBindingEnabled(true);
        return scene;
    }


    @Override
    public void onLoadComplete() {

    }

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

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