需要一些帮助，将敌人的子弹动画向下移动到屏幕上

Question

I need help figuring out why the enemy bullets won't move when they have identical code... Please help... I didn't make either one as a separate class just simple animations

Now I think that you can see when I say they have identical code, I mean like IDENTICAL code haha. It's really throwing me off that the player bullets work fine but the enemy bullets won't do anything

public void render(GameContainer gc, StateBasedGame sbg, Graphics g) throws SlickException {
map.draw(0,0);
// First enemy
enemy1.draw(enemy1PosX, enemy1PosY);
enemyShot.draw(enemy1PosX+30, enemy1PosY + 65);


//Player
ship.draw(shipPosX, shipPosY);
playerShot.draw(shootPosX+23, shootPosY);
Animation copy = playerShot.copy();
copy.draw(shootPosX+23, shootPosY);

g.drawString("Ship X: " + shipPosX + "\nShips Y: " + shipPosY,400,20);

if(quit == true) {
    g.drawString("Resume (R)",250,100);
    g.drawString("Main Menu (M)",250,150);
    g.drawString("Quit Game(Q)",250,200);
    if(quit==false){
        g.clear();
    }

}

}

public void update(GameContainer gc, StateBasedGame sbg, int delta) throws SlickException {
Input input = gc.getInput();
//Move Enemy

enemy1=enemyA;
//enemy1PosX += delta * .7f;
//enemy1PosY += delta * .1f;
    if(enemy1PosX > 668){
        enemy1PosX = -1;
        if(isEnemyHit(enemy1)){
            deadEnemies.add(enemy1);
    }
}


// up
if(input.isKeyDown(Input.KEY_UP)){
    ship = move;
    movefx.play();
    shipPosY -= delta * .6f;
    //collision detection
    if(shipPosY < 9){
        shipPosY = 9;

    }
}
//down
if(input.isKeyDown(Input.KEY_DOWN)){
    ship = move;
    shipPosY += delta * .6f;
    //collision detection
    if(shipPosY > 468){
        shipPosY = 468;
    }
}
//left
if(input.isKeyDown(Input.KEY_LEFT)){
    ship = move;
    shipPosX -= delta * .6f;
    //collision detection
    if(shipPosX < -1){
        shipPosX =-1;
    }
}
//right
if(input.isKeyDown(Input.KEY_RIGHT)){
    ship = move;
    shipPosX += delta * .6f;

    //collision detection
    if(shipPosX > 668){
        shipPosX = 668;
    }
}
    //FIRE PLAYER BULLETS
    playerShot = shootUp;
    playerShot.start();
    shootPosX = shipPosX-10;
    shootPosY -= delta * 1.3f;
    Animation copy = playerShot.copy();

    //Auto-Shoot bullet
    if(shootPosY <= shipPosY - 480){
        copy = playerShot;
        shootPosX = shipPosX;
        shootPosY = shipPosY; 
        shootPosY -= delta * 1.7f;
        copy.restart();
    }

    //FIRE ENEMY BULLETS
    enemyShot = shootDown;
    enemyShot.start();
    enemyShotPosX = enemy1PosX + 10;
    enemyShotPosY += delta * .3f;
    Animation dbl = playerShot.copy();

EnemyShot is an Animation playerShot is an animation No seperate enemy or player class either. Please help

Answer 1

You may want to give each individual enemy bullet it's own position, instead of one relative to the position of the enemy itself. This was inside of your render method:

enemyShot.draw(enemy1PosX+30, enemy1PosY + 65);

From what I understand, in the very best case scenario, this will make the bullet follow the enemies x and y position with a small amount of displacement. Also, you have the code that enables enemy movement commented, which is: //enemy1PosX += delta * .7f; //enemy1PosY += delta * .1f; //enemy1PosX += delta * .7f; //enemy1PosY += delta * .1f; Hope this helps!