public fire(angle : number, position : Vector, velocity : Vector, isMine : boolean, commitFireFn : (fireEnergy : number, fireDelay : number, recoilAcceleration : number) => boolean) : any {
    let level = this.level_.getValue();
    if (level < 0) {
      return null;
    }

    let fireEnergy = this.getFireEnergy_();
    let fireDelay = this.getFireDelay_();
    let recoilAcceleration = isMine ? 0 : this.getRecoilAcceleration_();

    if (!commitFireFn(fireEnergy, fireDelay, recoilAcceleration)) {
      return null;
    }

    let lifetime = this.getLifetime_();
    let damage = this.getDamage_();
    let bounceCount = this.getBounceCount_();
    let blastRadius = this.getBlastRadius_();
    let proxRadius = this.getProxRadius_();
    let newVelocity = isMine ? Vector.ZERO : velocity.add(Vector.fromPolar(this.getBombSpeed_(), angle));
    let projectile = this.simulation_.modelObjectFactory.newBomb(this.owner_, level, position, newVelocity, lifetime, damage, bounceCount, blastRadius, proxRadius);

    this.owner_.addProjectile(projectile);

    return {
      'type': this.getType(),
      'level': level,
      'vel': newVelocity.toArray(),
      'bounceCount': bounceCount
    };
  }

  public fire(angle : number, position : Vector, velocity : Vector, commitFireFn : (fireEnergy : number, fireDelay : number) => boolean) : any {
    let fireEnergy = this.getFireEnergy_();
    let fireDelay = this.getFireDelay_();
    let level = this.level_.getValue();

    if (level < 0 || !commitFireFn(fireEnergy, fireDelay)) {
      return null;
    }

    let factory = this.simulation_.modelObjectFactory;
    let lifetime = this.getLifetime_();
    let damage = this.getDamage_();
    let bounceCount = this.getBounceCount_();
    let bulletSpeed = this.getBulletSpeed_();
    let multifireAngle = (this.multifireState_ == ToggleState.ENABLED) ? this.gunSettings_['multifire']['angle'] : 0;

    let bullets = new Array<Bullet>();
    if (this.gunSettings_['doubleBarrel']) {
      let bulletVelocity = velocity.add(Vector.fromPolar(bulletSpeed, angle));
      let leftPosition = position.add(Vector.fromPolar(10, angle - Math.PI / 2));
      let rightPosition = position.add(Vector.fromPolar(10, angle + Math.PI / 2));

      bullets.push(factory.newBullet(this.owner_, level, leftPosition, bulletVelocity, lifetime, damage, bounceCount));
      bullets.push(factory.newBullet(this.owner_, level, rightPosition, bulletVelocity, lifetime, damage, bounceCount));
    } else {
      let bulletVelocity = velocity.add(Vector.fromPolar(bulletSpeed, angle));
      bullets.push(factory.newBullet(this.owner_, level, position, bulletVelocity, lifetime, damage, bounceCount));
    }

    if (this.multifireState_ == ToggleState.ENABLED) {
      let leftVelocity = velocity.add(Vector.fromPolar(bulletSpeed, angle - multifireAngle));
      let rightVelocity = velocity.add(Vector.fromPolar(bulletSpeed, angle + multifireAngle));
      bullets.push(factory.newBullet(this.owner_, level, position, leftVelocity, lifetime, damage, bounceCount));
      bullets.push(factory.newBullet(this.owner_, level, position, rightVelocity, lifetime, damage, bounceCount));
    }

    for (let i = 0; i < bullets.length; ++i) {
      this.owner_.addProjectile(bullets[i]);
    }

    new BulletGroup(bullets);

    return {
      'type': this.getType(),
      'angle': angle,
      'level': level,
      'bounceCount': bounceCount,
      'multifire': this.multifireState_ == ToggleState.ENABLED
    }
  }

  public onFired(timeDiff : number, position : Vector, velocity : Vector, weaponData : any) {
    assert(weaponData['type'] == this.getType(), 'Cannot fire bomb with incorrect weapon type: ' + weaponData['type']);

    let level = weaponData['level'];
    let bounceCount = weaponData['bounceCount'];
    velocity = Vector.fromArray(weaponData['vel']);

    // Make sure the level is correct so the following getters use the right value for their calculations.
    this.level_.setValue(level);

    let projectile = this.simulation_.modelObjectFactory.newBomb(this.owner_, this.level_.getValue(), position, velocity, this.getLifetime_(), this.getDamage_(), bounceCount, this.getBlastRadius_(), this.getProxRadius_());
    for (let i = 0; i < timeDiff; ++i) {
      projectile.advanceTime();
    }
    this.owner_.addProjectile(projectile);
  }

 public getLevel() : number {
   return this.level_.getValue();
 }

 private getProxRadius_() : number {
   return this.bombBaySettings_['proxRadius'] + this.level_.getValue() * this.bombBaySettings_['proxRadiusUpgrade'];
 }

 private getDamage_() : number {
   return this.bombBaySettings_['damage'] + this.level_.getValue() * this.bombBaySettings_['damageUpgrade'];
 }

 private getFireEnergy_() : number {
   let baseEnery = this.multifireState_ == ToggleState.ENABLED
     ? this.gunSettings_['multifire']['fireEnergy']
     : this.gunSettings_['fireEnergy'];
   return baseEnery * (this.level_.getValue() + 1);
 }