Andengine - Bài 16 lập trình game andengine cơ bản -sprite Collection

            Chào mừng các bạn đã quay trở lại với loạt bài hướng dẫn lập trình game trên android bằng thư viện andengine.

            Bài hôm nay mình sẽ giúp các bạn bắt được cự kiện va chạm giữa 2 sprite. Sau bài  này các bạn sẽ ứng dụng được nhiều vào các thể loại game cần tới sự va chạm.

Chúc các bạn thành công !

Video hướng dẫn :(like và G+ ủng hộ mình nha!)






Code project : Tại đây!

Code mainActivity.class

package example.collectiongame;

import javax.microedition.khronos.opengles.GL10;

import org.anddev.andengine.engine.Engine;
import org.anddev.andengine.engine.camera.Camera;
import org.anddev.andengine.engine.camera.hud.controls.BaseOnScreenControl;
import org.anddev.andengine.engine.camera.hud.controls.DigitalOnScreenControl;
import org.anddev.andengine.engine.camera.hud.controls.BaseOnScreenControl.IOnScreenControlListener;
import org.anddev.andengine.engine.handler.physics.PhysicsHandler;
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.scene.Scene;
import org.anddev.andengine.entity.scene.background.ColorBackground;
import org.anddev.andengine.entity.sprite.Sprite;
import org.anddev.andengine.entity.util.FPSLogger;
import org.anddev.andengine.opengl.texture.Texture;
import org.anddev.andengine.opengl.texture.TextureOptions;
import org.anddev.andengine.opengl.texture.region.TextureRegion;
import org.anddev.andengine.opengl.texture.region.TextureRegionFactory;
import org.anddev.andengine.ui.activity.BaseGameActivity;

import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;

public class MainActivity extends BaseGameActivity {
 
 private static final int CAMERA_WIDTH = 480;
 private static final int CAMERA_HEIGHT = 800;

 private Camera mCamera;
 
 
 private Texture textureEarth;
 private TextureRegion textureRegionEarth;
 
 private Texture textureAndengine;
 private TextureRegion textureRegionAndengine;
  
 
 private Texture mOnScreenControlTexture;
 private TextureRegion mOnScreenControlBaseTextureRegion;
 private TextureRegion mOnScreenControlKnobTextureRegion;
 

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

 }

 @Override
 public void onLoadResources() {
   TextureRegionFactory.setAssetBasePath("gfx/");
   
   
   this.textureEarth = new Texture(256, 256, TextureOptions.BILINEAR_PREMULTIPLYALPHA);
   this.textureRegionEarth = TextureRegionFactory.createFromAsset(this.textureEarth, this, "earth.png", 0, 0);
   this.mEngine.getTextureManager().loadTexture(this.textureEarth);
    
   
   this.textureAndengine = new Texture(256, 256, TextureOptions.BILINEAR_PREMULTIPLYALPHA);
   this.textureRegionAndengine= TextureRegionFactory.createFromAsset(this.textureAndengine, this, "logoimage.png", 0, 0);
   this.mEngine.getTextureManager().loadTexture(this.textureAndengine);
  
   
   
   this.mOnScreenControlTexture = new Texture(256, 128, TextureOptions.BILINEAR_PREMULTIPLYALPHA);
   this.mOnScreenControlBaseTextureRegion = TextureRegionFactory.createFromAsset(
     this.mOnScreenControlTexture, this, "onscreen_control_base.png", 0, 0);
   this.mOnScreenControlKnobTextureRegion = TextureRegionFactory.createFromAsset(
     this.mOnScreenControlTexture, this, "onscreen_control_knob.png", 128, 0);
   this.mEngine.getTextureManager().loadTextures(this.mOnScreenControlTexture);
 
  
 }

 @Override
 public Scene onLoadScene() {
  this.mEngine.registerUpdateHandler(new FPSLogger());
  final Scene scene = new Scene();
  scene.setBackground(new ColorBackground(0.09804f, 0.6274f, 0.8784f));
  
  final Sprite earth = new Sprite(CAMERA_WIDTH/2,600 , this.textureRegionEarth);
  earth.setScale(0.5f);
  scene.attachChild(earth);
  
  final Sprite andengine = new Sprite(50,100, this.textureRegionAndengine);
  final PhysicsHandler physicsHandler = new PhysicsHandler(andengine);
  andengine.setScale(0.5f);
  andengine.registerUpdateHandler(physicsHandler);
  scene.attachChild(andengine);
  
  
    final DigitalOnScreenControl digitalOnScreenControl = new DigitalOnScreenControl
      (0, CAMERA_HEIGHT - this.mOnScreenControlBaseTextureRegion.getHeight(), 
        this.mCamera, this.mOnScreenControlBaseTextureRegion, 
        this.mOnScreenControlKnobTextureRegion, 0.1f, new IOnScreenControlListener() {
       
              @Override
              public void onControlChange(final BaseOnScreenControl pBaseOnScreenControl, final float pValueX, final float pValueY) {
                  
               if(pValueX !=0 || pValueY!=0)
               {
                physicsHandler.setVelocity(pValueX*100, pValueY*100 );
                if(andengine.collidesWith(earth))
                 Log.v("", "Đã va chạm khi đang di chuyển");
                
                
               }else
               {
                physicsHandler.setVelocity(pValueX*0, pValueY*0 );
                if(andengine.collidesWith(earth))
                 Log.v("", "Đã va chạm khi vật đang dừng lại");
               }
           
               
               
              }
              
          });
 
          digitalOnScreenControl.getControlBase().setBlendFunction(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
          digitalOnScreenControl.getControlBase().setAlpha(0.5f);
          digitalOnScreenControl.getControlBase().setScaleCenter(0, 128);
          digitalOnScreenControl.getControlBase().setScale(1.25f);
          digitalOnScreenControl.getControlKnob().setScale(1.25f);
          digitalOnScreenControl.refreshControlKnobPosition();
          scene.setChildScene(digitalOnScreenControl);
          
  return scene;
 }

 @Override
 public void onLoadComplete() {
  // TODO Auto-generated method stub
  
 }


}