Kod:
package org.anddev.andengine.PhysicsRemoveExample;
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.primitive.Rectangle;
import org.anddev.andengine.entity.scene.Scene;
import org.anddev.andengine.entity.scene.Scene.IOnAreaTouchListener;
import org.anddev.andengine.entity.scene.Scene.IOnSceneTouchListener;
import org.anddev.andengine.entity.scene.Scene.ITouchArea;
import org.anddev.andengine.entity.scene.background.ColorBackground;
import org.anddev.andengine.entity.shape.Shape;
import org.anddev.andengine.entity.sprite.AnimatedSprite;
import org.anddev.andengine.entity.util.FPSLogger;
import org.anddev.andengine.extension.physics.box2d.PhysicsConnector;
import org.anddev.andengine.extension.physics.box2d.PhysicsFactory;
import org.anddev.andengine.extension.physics.box2d.PhysicsWorld;
import org.anddev.andengine.input.touch.TouchEvent;
import org.anddev.andengine.opengl.texture.Texture;
import org.anddev.andengine.opengl.texture.TextureOptions;
import org.anddev.andengine.opengl.texture.region.TextureRegionFactory;
import org.anddev.andengine.opengl.texture.region.TiledTextureRegion;
import org.anddev.andengine.sensor.accelerometer.AccelerometerData;
import org.anddev.andengine.sensor.accelerometer.IAccelerometerListener;
import org.anddev.andengine.ui.activity.BaseGameActivity;
import android.hardware.SensorManager;
import android.widget.Toast;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.physics.box2d.Body;
import com.badlogic.gdx.physics.box2d.FixtureDef;
import com.badlogic.gdx.physics.box2d.BodyDef.BodyType;
/**
* @author Nicolas Gramlich
* @since 18:47:08 - 19.03.2010
*/
public class PhysicsRemoveExample extends BaseGameActivity implements IAccelerometerListener, IOnSceneTouchListener, IOnAreaTouchListener {
// ===========================================================
// Constants
// ===========================================================
private static final int CAMERA_WIDTH = 720;
private static final int CAMERA_HEIGHT = 480;
// ===========================================================
// Fields
// ===========================================================
private Texture mTexture;
private TiledTextureRegion mBoxFaceTextureRegion;
private TiledTextureRegion mCircleFaceTextureRegion;
private PhysicsWorld mPhysicsWorld;
private int mFaceCount = 0;
private final Vector2 mTempVector = new Vector2();
// ===========================================================
// Constructors
// ===========================================================
// ===========================================================
// Getter & Setter
// ===========================================================
// ===========================================================
// Methods for/from SuperClass/Interfaces
// ===========================================================
@Override
public Engine onLoadEngine() {
Toast.makeText(this, "Touch the screen to add objects. Touch an object to remove it.", Toast.LENGTH_LONG).show();
final Camera camera = new Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT);
final EngineOptions engineOptions = new EngineOptions(true, ScreenOrientation.LANDSCAPE, new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT), camera);
engineOptions.getTouchOptions().setRunOnUpdateThread(true);
return new Engine(engineOptions);
}
@Override
public void onLoadResources() {
this.mTexture = new Texture(64, 64, TextureOptions.BILINEAR_PREMULTIPLYALPHA);
TextureRegionFactory.setAssetBasePath("gfx/");
this.mBoxFaceTextureRegion = TextureRegionFactory.createTiledFromAsset(this.mTexture, this, "face_box_tiled.png", 0, 0, 2, 1); // 64x32
this.mCircleFaceTextureRegion = TextureRegionFactory.createTiledFromAsset(this.mTexture, this, "face_circle_tiled.png", 0, 32, 2, 1); // 64x32
this.mEngine.getTextureManager().loadTexture(this.mTexture);
this.enableAccelerometerSensor(this);
}
@Override
public Scene onLoadScene() {
this.mEngine.registerUpdateHandler(new FPSLogger());
final Scene scene = new Scene(2);
scene.setBackground(new ColorBackground(0, 0, 0));
scene.setOnSceneTouchListener(this);
this.mPhysicsWorld = new PhysicsWorld(new Vector2(0, SensorManager.GRAVITY_EARTH), false);
final Shape ground = new Rectangle(0, CAMERA_HEIGHT - 2, CAMERA_WIDTH, 2);
final Shape roof = new Rectangle(0, 0, CAMERA_WIDTH, 2);
final Shape left = new Rectangle(0, 0, 2, CAMERA_HEIGHT);
final Shape right = new Rectangle(CAMERA_WIDTH - 2, 0, 2, CAMERA_HEIGHT);
final FixtureDef wallFixtureDef = PhysicsFactory.createFixtureDef(0, 0.5f, 0.5f);
PhysicsFactory.createBoxBody(this.mPhysicsWorld, ground, BodyType.StaticBody, wallFixtureDef);
PhysicsFactory.createBoxBody(this.mPhysicsWorld, roof, BodyType.StaticBody, wallFixtureDef);
PhysicsFactory.createBoxBody(this.mPhysicsWorld, left, BodyType.StaticBody, wallFixtureDef);
PhysicsFactory.createBoxBody(this.mPhysicsWorld, right, BodyType.StaticBody, wallFixtureDef);
scene.getBottomLayer().addEntity(ground);
scene.getBottomLayer().addEntity(roof);
scene.getBottomLayer().addEntity(left);
scene.getBottomLayer().addEntity(right);
scene.registerUpdateHandler(this.mPhysicsWorld);
scene.setOnAreaTouchListener(this);
return scene;
}
@Override
public boolean onAreaTouched(final TouchEvent pSceneTouchEvent, final ITouchArea pTouchArea, final float pTouchAreaLocalX, final float pTouchAreaLocalY) {
if(pSceneTouchEvent.getAction() == TouchEvent.ACTION_DOWN) {
PhysicsRemoveExample.this.removeFace((AnimatedSprite)pTouchArea);
return true;
}
return false;
}
public void onLoadComplete() {
}
@Override
public boolean onSceneTouchEvent(final Scene pScene, final TouchEvent pSceneTouchEvent) {
if(this.mPhysicsWorld != null) {
if(pSceneTouchEvent.getAction() == TouchEvent.ACTION_DOWN) {
this.addFace(pSceneTouchEvent.getX(), pSceneTouchEvent.getY());
return true;
}
}
return false;
}
@Override
public void onAccelerometerChanged(final AccelerometerData pAccelerometerData) {
this.mTempVector.set(pAccelerometerData.getY(), pAccelerometerData.getX());
this.mPhysicsWorld.setGravity(this.mTempVector);
}
// ===========================================================
// Methods
// ===========================================================
private void addFace(final float pX, final float pY) {
final Scene scene = this.mEngine.getScene();
this.mFaceCount++;
final AnimatedSprite face;
final Body body;
final FixtureDef objectFixtureDef = PhysicsFactory.createFixtureDef(1, 0.5f, 0.5f);
if(this.mFaceCount % 2 == 0) {
face = new AnimatedSprite(pX, pY, this.mBoxFaceTextureRegion);
body = PhysicsFactory.createBoxBody(this.mPhysicsWorld, face, BodyType.DynamicBody, objectFixtureDef);
} else {
face = new AnimatedSprite(pX, pY, this.mCircleFaceTextureRegion);
body = PhysicsFactory.createCircleBody(this.mPhysicsWorld, face, BodyType.DynamicBody, objectFixtureDef);
}
face.animate(200, true);
face.setUpdatePhysics(false);
scene.registerTouchArea(face);
scene.getTopLayer().addEntity(face);
this.mPhysicsWorld.registerPhysicsConnector(new PhysicsConnector(face, body, true, true, false, false));
}
private void removeFace(final AnimatedSprite face) {
final Scene scene = this.mEngine.getScene();
final PhysicsConnector facePhysicsConnector = this.mPhysicsWorld.getPhysicsConnectorManager().findPhysicsConnectorByShape(face);
this.mPhysicsWorld.unregisterPhysicsConnector(facePhysicsConnector);
this.mPhysicsWorld.destroyBody(facePhysicsConnector.getBody());
scene.unregisterTouchArea(face);
scene.getTopLayer().removeEntity(face);
}
// ===========================================================
// Inner and Anonymous Classes
// ===========================================================
}
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