/// <summary>
/// Update projectile
/// </summary>
public bool Update(float elapsedTime, GameManager game)
{
if (game == null)
{
throw new ArgumentNullException("game");
}
// add elapsed time for this frame
this.elapsedTime += elapsedTime;
// normalize time
float normalizedTime = Math.Min(1.0f, this.elapsedTime / totalTime);
// compute current projectile position
Vector3 position = Vector3.Lerp(sourcePosition, destinationPosition,
normalizedTime);
// set postion into projectile transform matrix
transform.Translation = position;
// if projectile includes a particle system update its position
if (system != null)
system.SetTransform(systemTransform * transform);
// check if projectile hit any player
int playerHit = game.GetPlayerAtPosition(position);
// if a player is hit or reached destination explode projectile
if ((playerHit != player && playerHit != -1) ||
normalizedTime == 1.0f)
{
// compute explosion position moving hit point into hit normal direction
Vector3 explosionPosition =
position + 0.5f * animatedSpriteSize * transform.Backward;
// set transform to explosion position
transform.Translation = explosionPosition;
// if an animated sprite explosion is available, create it
if (animatedSpriteSize > 0)
game.AddAnimSprite(animatedSprite, explosionPosition,
animatedSpriteSize, 10.0f, animatedSpriteFrameRate,
animatedSpriteDrawMode, -1);
// if splash damage is available, apply splash damage to nearby players
if (explosionDamageRadius > 0)
game.AddDamageSplash(player, explosionDamage,
explosionPosition, explosionDamageRadius);
// if exploded on a player add contact damage
if (playerHit != -1 && game.GetPlayer(playerHit).IsAlive)
game.AddDamage(player, playerHit, contactDamage,
Vector3.Normalize(destinationPosition - sourcePosition));
// if explosion sound is available, play it
if (explosionSound != null)
game.PlaySound3D(explosionSound, explosionPosition);
// add explosion particle system
if (projectileType == ProjectileType.Missile)
game.AddParticleSystem(
ParticleSystemType.MissileExplode,
transform);
else
if (projectileType == ProjectileType.Blaster)
game.AddParticleSystem(
ParticleSystemType.BlasterExplode,
transform);
// kill trail particle system
if (system != null)
system.SetTotalTime(-1e10f);
// return false to kill the projectile
return false;
}
// return true to keep projectile alive
return true;
}
// collision box radius
/// <summary>
/// Create a new player ship
/// </summary>
public PlayerShip(
GameManager game, // game manager
int player, // player id
Model model, // model for player ship
EntityList entities, // entity list for ship model
float radius)
{
if (game == null)
{
throw new ArgumentNullException("game");
}
if (entities == null)
{
throw new ArgumentNullException("entities");
}
// save parameters
gameManager = game;
shipModel = model;
shipEntities = entities;
playerIndex = player;
// create movement controller
movement = new PlayerMovement();
movement.maxVelocity = GameOptions.MovementVelocity;
// enable collision sound
collisionSound = true;
// create engine particle system with infinite life time
particleBoost = gameManager.AddParticleSystem(
ParticleSystemType.ShipTrail,
transform);
particleBoost.SetTotalTime(1e10f);
boostTransform = shipEntities.GetTransform("engine");
// create the ship collision box
box = new CollisionBox(-radius, radius);
// random bobbing offset
random = new Random(player);
bobbingTime = (float)random.NextDouble();
// setup 3rd person camera parameters
camera3rdPerson = false;
chaseCamera = new ChaseCamera();
chaseCamera.DesiredPositionOffset = GameOptions.CameraOffset;
chaseCamera.LookAtOffset = GameOptions.CameraTargetOffset;
chaseCamera.Stiffness = GameOptions.CameraStiffness;
chaseCamera.Damping = GameOptions.CameraDamping;
chaseCamera.Mass = GameOptions.CameraMass;
}
