protected override void Update(GameTime gameTime)
{
_inputManager.Update(gameTime);
for (int i = 0; i < _world.Count; i++)
{
var obj = _world[i];
obj.Update();
if (obj.IsDestroyed)
{
_world.RemoveAt(i--);
}
if (obj is Rocket)
{
_particles.Emit(_ppRocket, obj.Position - new Vector2(10f * Maf.Sin(obj.Rotation), -10f * Maf.Cos(obj.Rotation)), 1f * Chaos.GetFloat() * Chaos.GetVector2());
}
if (obj is PlasmaBullet)
{
_particles.Emit(_ppPlasma, obj.Position, Vector2.Zero);
}
}
_particles.Update();
Collisions.Detect(_world, _particles, _ppExplosion);
_worldLoopParticles.Clusterize(_particles.ParticlesList);
_worldLoop.Clusterize(_world);
base.Update(gameTime);
}
private void InitializeInputManager()
{
_inputManager = new InputManager(this);
this.Activated += new EventHandler <EventArgs>(Game_Activated);
this.Deactivated += new EventHandler <EventArgs>(Game_Deactivated);
_inputManager.ExitGame += Exit;
_inputManager.DebugMode += () => GameOptions.IsDebugMode = !GameOptions.IsDebugMode;
_inputManager.PlayStopMediaPlayer += () =>
{
if (MediaPlayer.Queue.ActiveSong != null)
{
if (MediaPlayer.State == MediaState.Paused)
{
MediaPlayer.Resume();
}
else
{
MediaPlayer.Pause();
}
}
else
{
MediaPlayer.Play(_song);
}
};
var strafeAcceleration = 0.5f;
_inputManager.MoveRightLeft += e => _ship.Strafe(strafeAcceleration * e.Value);
var moveAcceleration = 0.5f;
_inputManager.MoveUpDown += e =>
{
_ship.SpeedUp(moveAcceleration * e.Value);
if (e.Value > 0)
{
_particles.Emit(_ppFire, _ship.Position - new Vector2(10f * Maf.Sin(_ship.Rotation), -10f * Maf.Cos(_ship.Rotation)), _ship.Speed - new Vector2(4f * Maf.Sin(_ship.Rotation), -4f * Maf.Cos(_ship.Rotation)) + Chaos.GetFloat() * Chaos.GetVector2());
}
};
_inputManager.PrimaryWeapon += e => _ship.Shoot(e.State);
_inputManager.SecondaryWeapon += e => _ship.ShootAlt(e.State);
_inputManager.Rotate += e => _ship.Rotate(e.Value * 0.1f);
}
public void SpeedUp(float acceleration)
{
Speed.X += acceleration * Maf.Sin(Rotation);
Speed.Y -= acceleration * Maf.Cos(Rotation);
}
public void Strafe(float strafeStep)
{
Speed.X += strafeStep * Maf.Cos(Rotation);
Speed.Y += strafeStep * Maf.Sin(Rotation);
}
public static void Detect(List <GameObject> gameObjects, Particles particles, ParticleParameters particleParameters)
{
for (int j = 0; j < gameObjects.Count; j++)
{
for (int i = 0; i < gameObjects.Count; i++)
{
if (i == j || i < 0 || j < 0)
{
continue;
}
var go1 = gameObjects[i];
var go2 = gameObjects[j];
float dx = go2.Position.X - go1.Position.X;
float dy = go2.Position.Y - go1.Position.Y;
float rr = go2.Size / 2 + go1.Size / 2;
float ol2 = rr * rr - dx * dx - dy * dy;
if (ol2 > 0)
{
if ((go1 is Rocket || go1 is PlasmaBullet) && (go2 is Asteroid || go2 is Ship))
{
for (int h = 0; h < 100; h++)
{
particles.Emit(particleParameters, (go1.Position + go2.Position) / 2f, 3f * Chaos.GetFloat() * Chaos.GetVector2());
}
gameObjects.RemoveAt(i--);
if (go2 is Asteroid)
{
go2.Size -= 20f;
if (go2.Size < 40f)
{
gameObjects.RemoveAt(j--);
}
}
continue;
}
if ((go1 is Ship) && go2 is SpeedBonus)
{
go1.Speed += new Vector2(10f * Maf.Sin(go1.Rotation), -10f * Maf.Cos(go1.Rotation));
gameObjects.RemoveAt(j--);
continue;
}
// ось столкновения и нормаль к ней
var nrm = new Vector2(dx, dy);
var tan = new Vector2(dy, -dx);
nrm.Normalize();
tan.Normalize();
// проекция скорости на ось столкновения (нормальная скорость)
float go1nrm = Vector2.Dot(go1.Speed, nrm);
float go2nrm = Vector2.Dot(go2.Speed, nrm);
// перераспределяем импульс между нормальными скоростями в соответствии с массами
float go1rsp = ((go1.Mass - go2.Mass) * go1nrm + 2f * go2.Mass * go2nrm) / (go1.Mass + go2.Mass);
float go2rsp = ((go2.Mass - go1.Mass) * go2nrm + 2f * go1.Mass * go1nrm) / (go1.Mass + go2.Mass);
// проекция скорости на нормаль к оси столкновения (тангенциальная скорость)
float go1tan = Vector2.Dot(go1.Speed, tan);
float go2tan = Vector2.Dot(go2.Speed, tan);
go1.Speed = nrm * go1rsp + tan * go1tan;
go2.Speed = nrm * go2rsp + tan * go2tan;
float gp = Maf.Sqrt(ol2);
go1.Position -= gp * go2.Mass / (go1.Mass + go2.Mass) * nrm;
go2.Position += gp * go1.Mass / (go1.Mass + go2.Mass) * nrm;
}
}
}
}
public static Vector2 GetVector2()
{
float a = GetFloat(MathHelper.TwoPi);
return(new Vector2(Maf.Cos(a), Maf.Sin(a)));
}
