/// <summary>
/// Recursively looks for an optimal place to spawn an NPC car where it won't collide with any other NPCs
/// </summary>
/// <param name="pcCar"></param>
/// <param name="list"></param>
/// <param name="car">The car we intend to spawn</param>
/// <param name="laneNum">the lane on the freeway the car belongs to</param>
/// <param name="rand">a random number generator we pass by reference</param>
/// <param name="attemptCount">the number of attempts it has taken us to spawn this car</param>
public void OptimizeSpawnPosition(PcCar pcCar, IList<Car> list, Car car, int laneNum, ref Random rand, ref int attemptCount)
{
Car collisionCar;
if ((CheckNpcHardCollision(list, car.SoftCollisionBoundary, out collisionCar)
|| pcCar.SoftCollisionBoundary.Intersects(car.HardCollisionBoundary)
) && attemptCount <= MaxSpawnAttempts)
{
/* All of this code needs to execute whenever an NPC car has:
* 1. Spawned on top of another NPC
* 2. Spawned on top of the PC
* 3. And the maxmimum number of spawn attempts has not been reached.
*/
attemptCount++;
InitializeNpcCar(car, laneNum, ref rand);
OptimizeSpawnPosition(pcCar, list, car, laneNum, ref rand, ref attemptCount);
}
}
/// <summary>
/// LoadContent will be called once per game and is the place to load
/// all of your content.
/// </summary>
protected override void LoadContent()
{
// Create a new SpriteBatch, which can be used to draw textures.
_spriteBatch = new SpriteBatch(GraphicsDevice);
_backGroundTexture = Content.Load<Texture2D>("Content\\Images\\road");
_whitecarTexture = Content.Load<Texture2D>("Content\\Images\\whitecar");
_redcarTexture = Content.Load<Texture2D>("Content\\Images\\redcar");
_bluecarTexture = Content.Load<Texture2D>("Content\\Images\\bluecar");
World.Explosions = new List<Texture2D>
{
Content.Load<Texture2D>("Content\\Images\\explosion_1"),
Content.Load<Texture2D>("Content\\Images\\explosion_2"),
Content.Load<Texture2D>("Content\\Images\\explosion_3"),
Content.Load<Texture2D>("Content\\Images\\explosion_4")
};
_explosionSoundEffect = Content.Load<SoundEffect>("Content\\Audio\\Explosion");
_font = Content.Load<SpriteFont>("Content\\Fonts\\GameText");
_background.LoadContent(GraphicsDevice, _backGroundTexture);
_world = new World(new Rectangle(0, 0, GraphicsDevice.Viewport.Width, GraphicsDevice.Viewport.Height));
_scoreBoard = new ScoreBoard("Your Score: ", ref _world.Bounds, _font);
_pc = new PcCar(_redcarTexture);
_world.InitializePcCar(_pc);
_pc.LoadNpcCars(_world, Cars, 17, new Texture2D[] { _whitecarTexture, _bluecarTexture });
TouchPanel.EnabledGestures = GestureType.FreeDrag;
}
public void CheckNpcSoftCollision(IList<Car> cars, PcCar pc)
{
}