public override void DoPhysics()
{
// get direction to the current target
Vector2 direction = OwnMath.GetDirectionToPoint(Position.ToPoint(), targetPos.ToPoint());
// get the angle between the zombie and the player
float angle = OwnMath.CalculateAngleBetweenPoints(Position.ToPoint(), targetPos.ToPoint());
float distance = direction.Length(); // distance equals the length of the vector
direction.Normalize(); // normalize the direction to units
// move the zombie and set the animation if the zombie didnt reach the player
// basically follow the player
if (distance > ATTACK_DISTANCE)
{
currentAnimationKey = MOVE_ANIMATION_KEY;
_physics.position.X += direction.X * _physics.speed;
_physics.position.Y += direction.Y * _physics.speed;
}
else // if reached invoke the attack according to the fire rate
{
currentAnimationKey = ATTACK_ANIMATION_KEY; // set the animation to attack
attackTimer += gameTime.ElapsedGameTime.Milliseconds; // increase time
if (attackTimer >= ATTACK_ANIMATION_TIMER)
{
// Attack
zombieAttack.Invoke();
attackTimer = 0; // reset timer after reaching max
}
}
_physics.rotation = angle;
}
public Bullet(Texture2D Texture, Player player)
{
Random r = new Random();
this.Texture = Texture;
this.player = player;
damage = player.Damage;
Console.WriteLine(damage);
// spawn from the origin of the player
Position = player.Position;
// calculcate which direction the bullet will go
direction = OwnMath.GetDirectionToPoint(player.Position.ToPoint(), player.Input.Cursor.Position.ToPoint());
// get the rotation to the mouse pointer (equal be the player._physics.rotation)
rotation = OwnMath.CalculateAngleBetweenPoints(player.Position.ToPoint(), player.Input.Cursor.Position.ToPoint());
// default speed
speed = 5f;
}
public void Update(GameTime gameTime)
{
SpawnZombie(gameTime);
// if any blood is animated then we make it disapear
bloodAnimations.RemoveAll((b) => { return(b.Active == false); });
// animate the bullets the player fired
foreach (var bullet in bulletsFired)
{
bullet.Update(gameTime);
}
// animate all blood that is activated
foreach (var blood in bloodAnimations)
{
blood.Update(gameTime);
}
// checks and remove the zombie with 0 health (or dead) from the list
for (int i = 0; i < zombies.Count; i++)
{
if (!zombies[i].IsAlive)
{
// increase kill points
zombiesKilledCounter++;
// remove zombie from zombie list
zombies.RemoveAt(i);
// when removing from a list, the zombie count decreases
i--;
}
}
// update the zombie (important to do it after, so we wont animate the dead zombies)
foreach (var zombie in zombies)
{
zombie.Update(gameTime, currentPlayer.Position);
}
// Checks the collision between the bullets and the zombies
for (int i = 0; i < bulletsFired.Count; i++)
{
// the current bullet
var bullet = bulletsFired[i];
for (int j = 0; j < zombies.Count; j++)
{
// current zombie
var zombie = zombies[j];
// the distance between the zombie and the bullet
var dist = OwnMath.GetDirectionToPoint(bullet.Position.ToPoint(), zombie.Position.ToPoint());
// if the distance is less than 20 (about zombie width)
// and the bullet is not removed already for other reason
if (dist.Length() < 20 && bulletsFired.Count > i)
{
// bullet hits, add points to the fighter ability charge
currentPlayer.abilityCharge += (int)bullet.damage;
bulletsFired.RemoveAt(i);
zombie.TakeDamage(bullet.damage);
bloodAnimations.Add(new Blood(Content, zombie.Position));
}
}
for (int j = 0; j < CurrentRoom.collideables.Count; j++)
{
var col = CurrentRoom.collideables[j];
if (bullet.Rectangle.Intersects(col.Rectangle))
{
bulletsFired.Remove(bullet);
if (col.TakeDamage())
{
CurrentRoom.collideables.Remove(col);
if (col.Type == Component.ObjectType.SPAWN_POINT)
{
CurrentRoom.spawnPlaces.Remove(col.Position);
}
}
}
}
// if the bullet reached the screen bounds, remove it from the list
if (bullet.Position.X > width - 50 || bullet.Position.Y > height - 50 || bullet.Position.X < 50 || bullet.Position.Y < 50)
{
// if the bullet is not removed already for other reason
if (bulletsFired.Count > i)
{
bulletsFired.RemoveAt(i);
}
}
}
if (CurrentRoom.DoorOpened)
{
Rectangle r1 = new Rectangle((int)currentPlayer.Position.X, (int)currentPlayer.Position.Y, currentPlayer.GetAnimation().Width / 2, currentPlayer.GetAnimation().Height / 2);
if (r1.Intersects(CurrentRoom.Exit.Rectangle))
{
Data.SetScore(Data.GetScore() + zombiesKilledCounter);
CurrentRoom.LoadMap();
ResetGame();
}
}
}