Android Game example, Enemy Missile Pool
다수의 적 비행기가 동일한 미사일 풀을 사용하여 성능과 메모리 사용량을 고려한 예
GameState.java
package game.framework;
import java.util.ArrayList;
import java.util.Random;
import android.graphics.*;
import android.util.*;
import android.view.KeyEvent;
import android.view.MotionEvent;
public class GameState implements IState {
Background background;
BackgroundClouds clouds;
Airplane airplane;
GameKeyPad keyPad;
SpriteAnimation expAni;
boolean isCollided;
Random rd;
ArrayList<EnemyPlane> enemyList;
long enemyCreationTime;
public GameState() {
keyPad = new GameKeyPad();
airplane = new Airplane();
airplane.init();
airplane.inuse = true;
background = new Background();
clouds = new BackgroundClouds();
expAni = new SpriteAnimation(AppManager.getInstance().getBitmap(R.drawable.explosion_transparent));
expAni.initSpriteData(4, 4, expAni.bitmap.getWidth()/4, expAni.bitmap.getHeight()/4,
16, 16);
rd = new Random();
enemyList = AppManager.getInstance().enemyList;
enemyCreationTime = System.currentTimeMillis();
}
@Override
public void init() { }
@Override
public void destroy() { }
@Override
public void update() {
createEnemy();
background.update();
clouds.update();
airplane.update();
EnemyMisPool.getInstance().update();
for(int i=0;i<AppManager.getInstance().enemyList.size();i++) {
if(!(AppManager.getInstance().enemyList.get(i).inuse)) continue;
AppManager.getInstance().enemyList.get(i).update();
}
collisionCheck();
collisionCheck2();
if(isCollided) expAni.update(System.currentTimeMillis());
}
@Override
public void render(Canvas canvas) {
background.draw(canvas);
clouds.draw(canvas);
airplane.draw(canvas);
EnemyMisPool.getInstance().draw(canvas);
for(int i=0;i<AppManager.getInstance().enemyList.size();i++) {
if(!AppManager.getInstance().enemyList.get(i).inuse) continue;
AppManager.getInstance().enemyList.get(i).draw(canvas);
}
if(isCollided) expAni.draw(canvas);
if(expAni.currentFrame==expAni.cntOfFrames-1) isCollided = false;
keyPad.draw(canvas);
}
/* 아군의 미사일과 적기의 충돌검사 */
public void collisionCheck() {
ArrayList<EnemyPlane> enemyList = AppManager.getInstance().enemyList;
ArrayList<Missile> misList = airplane.misList;
int enemyCnt = enemyList.size();
for(int i=0;i<misList.size();i++) {
if(!misList.get(i).inuse) continue;
for(int k=0;k<enemyCnt;k++) {
if(!enemyList.get(k).inuse) continue;
if(misList.get(i).rect.intersect(enemyList.get(k).rect)) {
// 충돌탐지/충돌위치에 폭발애니 출력/적기, 미사일 안보이게 처리
expAni.setPosition(misList.get(i).x-expAni.spriteWidth/2,
misList.get(i).y-expAni.spriteHeight/2-20);
misList.get(i).inuse = false;
enemyList.get(k).inuse = false;
isCollided = true;
break;
}
}
}
}
/* 적기의 미사일과 아군기의 충돌검사 */
public void collisionCheck2() {
if(!airplane.inuse)return;
ArrayList<EnemyPlane> enemyList = AppManager.getInstance().enemyList;
for(int i=0;i<enemyList.size();i++) {
if(!enemyList.get(i).inuse) continue;
ArrayList<Missile> misList = EnemyMisPool.getInstance().pool;
for(int k=0;k<misList.size();k++) {
if(!misList.get(k).inuse) continue;
if(misList.get(k).rect.intersect(airplane.rect)) {
Log.i("충돌검사", "아군기 피격");
/* 충돌탐지/충돌위치에 폭발애니 출력/비행기, 미사일 안보이게 처리 */
expAni.setPosition(airplane.x, airplane.y);
misList.get(k).inuse = false;
airplane.inuse = false;
isCollided = true;
break;
}
}
}
}
public void createEnemy(){
long currentTime = System.currentTimeMillis();
if((currentTime-enemyCreationTime)<3000) return;
enemyCreationTime = currentTime;
if(rd.nextInt(2)==0) {
int len = enemyList.size();
EnemyPlane ep = null;
for(int i=0;i<len;i++){
if(!enemyList.get(i).inuse){
ep = enemyList.get(i);
Log.i("createEnemy", "재활용");
break;
}
}
if(ep==null){
ep = new EnemyPlane();
Log.i("createEnemy", "적기 새로생성");
}
ep.setPosition(0, 0);
ep.inuse = true;
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
return false;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
return keyPad.onTouchEvent(event);
}
}
Missile.java
package game.framework;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Rect;
public class Missile extends GraphicObject {
int speedX, speedY;
int bitmapHeight;
boolean inuse;
Rect rect = new Rect();
public Missile() {
super(AppManager.getInstance().getBitmap(R.drawable.missile));
bitmapHeight = bitmap.getHeight();
}
public Missile(Bitmap bitmap) {
super(bitmap);
bitmapHeight = bitmap.getHeight();
}
public void setSpeed(int speedX, int speedY) {
this.speedX = speedX;
this.speedY = speedY;
}
public void update() {
if(!inuse) return;
y += this.speedY;
rect.left = x;
rect.top = y;
rect.bottom = bitmap.getHeight()+y;
rect.right = bitmap.getWidth()+x;
if(y< -bitmapHeight) {
inuse = false;
}
}
public void draw(Canvas canvas) {
if(!inuse) return;
if(y>canvas.getHeight()) inuse = false;
canvas.drawBitmap(bitmap, x, y, null);
}
}
EnemyPlane.java
package game.framework;
import java.util.*;
import android.graphics.Canvas;
import android.util.Log;
public class EnemyPlane extends Airplane {
long prevFireTime;
Random rd;
public EnemyPlane() {
super(AppManager.getInstance().getBitmap(R.drawable.enemy_transparent));
setSpeed(0, 2);
AppManager.getInstance().enemyList.add(this);
prevFireTime = System.currentTimeMillis();
rd = new Random();
y = 0;
}
@Override
public void update() {
if(inuse) {
if(this.x==0 && this.y==0) return;
x += speedX;
y += speedY;
rect.left = x;
rect.top = y;
rect.bottom = bitmap.getHeight()+y;
rect.right = bitmap.getWidth()+x;
fireMissile();
}
/*적기의 미사일 공통 풀을 사용할 시에는 이 부분을 EnemyMisPool에서 수행함
for(int i=0;i<EnemyMisPool.getInstance().pool.size();i++) {
if(EnemyMisPool.getInstance().pool.get(i).inuse)
EnemyMisPool.getInstance().pool.get(i).update();
}*/
}
@Override
public void draw(Canvas canvas) {
if(inuse) {
if(this.x==0 && this.y==0) {
this.x = rd.nextInt(canvas.getWidth()-bitmap.getWidth());
this.y = -(bitmap.getHeight());
}
}
/* 적기의 미사일 공통 풀을 사용할 시에는 이 부분을 EnemyMisPool에서 수행함
for(int i=0;i<EnemyMisPool.getInstance().pool.size();i++) {
if(EnemyMisPool.getInstance().pool.get(i).inuse)
EnemyMisPool.getInstance().pool.get(i).draw(canvas);
}*/
if(!inuse) return;
if(y>canvas.getHeight()) inuse = false;
canvas.drawBitmap(bitmap, x, y, null);
//Log.i("적기", "draw()");
}
@Override
public void fireMissile() {
long currentTime = System.currentTimeMillis();
if(!(currentTime-prevFireTime > 3000) ) return;
if(rd.nextInt(30)!=0) return;
Missile misToFire = null;
//EnemyMisPool.getInstance().pool;
for(int i=0;i<EnemyMisPool.getInstance().pool.size();i++) {
if( ! EnemyMisPool.getInstance().pool.get(i).inuse) {
misToFire = EnemyMisPool.getInstance().pool.get(i);
Log.i("미사일선택", "미사일 재사용");
break;
}
}
if(misToFire==null) {
misToFire = new Missile(AppManager.getInstance().getBitmap(R.drawable.enemy_missile));
Log.i("미사일선택", "미사일 새로 생성");
EnemyMisPool.getInstance().pool.add(misToFire);
}
misToFire.setPosition(this.x+(bitmap.getWidth()/2)-(misToFire.bitmap.getWidth()/2), this.y);
misToFire.setSpeed(0, 4);
misToFire.inuse = true;
prevFireTime = currentTime;
}
}
EnemyMisPool.java
package game.framework;
import java.util.ArrayList;
import android.graphics.Canvas;
public class EnemyMisPool {
private static EnemyMisPool instance;
public ArrayList<Missile> pool = new ArrayList<Missile> ();
private EnemyMisPool() { }
public static EnemyMisPool getInstance() {
if(instance==null) instance = new EnemyMisPool();
return instance;
}
public void update () {
for(int i=0;i<pool.size();i++) {
if(pool.get(i).inuse) pool.get(i).update();
}
}
public void draw(Canvas canvas) {
for(int i=0;i<pool.size();i++) {
if(pool.get(i).inuse) pool.get(i).draw(canvas);
}
}
}