private void CheckCollisions(CollisionEngine collisionEngine, SoundEngine soundEngine,
List<Powerup> powerups, List<Asteroid> asteroids)
{
// Check if the ship hits the edge of the universe
if (collisionEngine.CollidesWithEdge(this.Position, this.BoundingSphere))
{
float edge = collisionEngine.EDGE_OF_UNIVERSE;
Vector3 pos = this.Position;
if (pos.X > edge)
pos.X = edge;
if (pos.X < -edge)
pos.X = -edge;
if (pos.Y > edge)
pos.Y = edge;
if (pos.Y < -edge)
pos.Y = -edge;
if (pos.Z > edge)
pos.Z = edge;
if (pos.Z < -edge)
pos.Z = -edge;
UpdatePosition(pos);
}
// The ship is destroyed if it hits an asteroid unless it has a shield,
// in that case the asteroid is destroyed.
foreach (Asteroid asteroid in asteroids)
{
if (collisionEngine.CollideTwoObjects(this.BoundingSphere,
asteroid.BoundingSphere))
{
if (this.Shield != null)
{
asteroid.Destroyed = true;
this.Shield = null;
}
else
{
this.Destroyed = true;
LoseLife();
}
if (soundEngine.Explosion.State != SoundState.Playing)
soundEngine.Explosion.Play();
}
}
// The ship gets a powerup if it runs over it
foreach (Powerup powerup in powerups)
{
if (collisionEngine.CollideTwoObjects(this.BoundingSphere, powerup.BoundingSphere))
{
if (powerup.Type == Powerup.PowerupType.Shield && this.Shield == null)
this.Shield = powerup;
if (powerup.Type == Powerup.PowerupType.Shrink && this.Shrink == null)
this.Shrink = powerup;
powerup.Collected = true;
// The powerup is activated if it is a shield
if (powerup.Type == Powerup.PowerupType.Shield)
{
powerup.Activated = true;
soundEngine.Shield.Play();
}
break;
}
}
}
private void CheckCollisions(CollisionEngine collisionEngine, SoundEngine soundEngine,
ParticleEngine particleEngine, GameTime gameTime, List<Asteroid> asteroids)
{
// Destroy the torpedo if it hits the edge of the universe
if (collisionEngine.CollidesWithEdge(this.Position, this.BoundingSphere))
{
if (soundEngine.Explosion.State != SoundState.Playing)
soundEngine.Explosion.Play();
this.Destroyed = true;
particleEngine.AddParticle(gameTime, this.Position);
}
// Destroy the torpedo if it hits an asteroid
foreach (Asteroid asteroid in asteroids)
{
if (collisionEngine.CollideTwoObjects(this.BoundingSphere, asteroid.BoundingSphere))
{
particleEngine.AddParticle(gameTime, this.Position);
this.Destroyed = true;
break;
}
}
}
