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一个主要的困境是我的游戏最大的方面似乎无法运行。我正在制作一个 3D 太空侵略者游戏，我试图让玩家（和敌人）互相发射子弹。但似乎两者都没有这样做。

我有一个攻击管理器来处理他们的代码。

/**
* Prepares a bullet for firing if the current time is greater than 
*   the last fired time + the firing delay. This purpose of this is to 
*   put a delay between each bullet as it is fired.  A bullet is only
*   'readied' for firing if it is available, i.e. it's alive property
*   is set to false.
*       
*/
void PlayerAttackManager::fireBullet() {
    if ( mCurrentTime > ( mLastFiredTime + sFIRE_DELAY ) ) {
        // Find the next available bullet (if one exists)
        std::vector<Bullet>::iterator end = mBullets.end();
        std::vector<Bullet>::iterator curr = mBullets.begin();
        for ( ; curr != end && (*curr).alive() == true; ++curr ); 

        // If there is a bullet available.
        if ( curr != end ) {
        // Move bullet to firing location and set alive.
            Vector3 bulletPos = mSceneMgr->getSceneNode( "PlayerParentNode" )->getPosition();

            Vector3 bulletDir = mSceneMgr->getSceneNode( "PlayerParentNode" )->getOrientation() * Vector3::UNIT_Z;
            // Pass the initial screen position and direction of travel for the bullet.
            (*curr).reset( bulletPos, bulletDir );

        }

        mLastFiredTime = mCurrentTime;
    }
}

每次按下空格键时都会调用上述方法，但它会从玩家位置向下发射一颗敌人子弹，从玩家上方向下发射另一颗子弹。

敌人应该攻击（每秒一次），从 main.cpp frameRenderingQueued 方法调用 EnemyAttackManager 来触发 EnemyAttackManager 的更新如下：

void EnemyAttackManager::update(Real const & timeSinceLastFrame, string name)
{
    mName = name;
    std::vector<Bullet>::iterator end = mBullets.end();
    std::vector<Bullet>::iterator curr = mBullets.begin();
    for ( ; curr != end && (*curr).alive() == true; ++curr ) {

        if ( curr != end ) {
        // Move bullet to firing location and set alive.
            Vector3 bulletPos = mSceneMgr->getSceneNode( mName + "Node" )->getPosition();

            Vector3 bulletDir =mSceneMgr->getSceneNode(mName+ "Node" )->getOrientation() * Vector3::UNIT_Z;
            // Pass the initial screen position and direction of travel for the bullet.
            (*curr).reset( bulletPos, bulletDir );
            (*curr).update(timeSinceLastFrame);
        }


    }
    // Add time since last frame.
    mCurrentTime += timeSinceLastFrame;
}

子弹的更新和重置功能分别是：

void Bullet::update( Real const & timeSinceLastFrame ) {
    mTtl -= timeSinceLastFrame;
    if ( mTtl <= 0 ) {
        mNode->setVisible( false );
    }
    else {
        Enemy* enem = new Enemy();
        mNode->translate( sMOVE * mDir * timeSinceLastFrame, Node::TS_LOCAL );
        // Retrieve a list of possible enemies.
        std::vector<Enemy *> enemyVec = enem->getEnemies();
        std::vector<Enemy *>::iterator curr = enemyVec.begin();
        std::vector<Enemy *>::iterator end = enemyVec.end();
        // Check if the ray intersected any of the enemies
        for ( ; curr != end && !CollisionManager::instance()->rayIntersects( mNode->getPosition(), 0, (*curr)->meshName(), mDir )
            ; ++curr );
        if ( curr != end ) { // if bullet has collided with an enemy.
            //(*curr)->applyDamage();
            mTtl = 0;
            //JetPack3D::score += 10;
            mNode->setVisible( false );
        }
        //Check the current bullet pos vs. player       
    }
}


void Bullet::reset( Vector3 const & bulletPos, Vector3 const & bulletDir ) {
    mNode->setPosition( bulletPos );
    mNode->setVisible( true );
    mTtl = sLIFE_TIME;
    mDir = bulletDir;
    // Need to reverse x and z components so bullet fires forward into the scene.
    //now need it to fire right?
    mDir.z *= -1;
    mDir.x *= -1;
}

所以我的问题是：我如何让敌人和玩家发射子弹（敌人开火而玩家朝着正确的方向）

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