/// <summary>
/// Update powerup for given elapsed time
/// </summary>
public bool Update(GameManager game, float elapsedTime)
{
if (game == null)
{
throw new ArgumentNullException("game");
}
// add elapsed time for this frame
this.elapsedTime += elapsedTime;
// if waiting to respawn
if (waitTime > 0)
{
// decrease wait time
waitTime = Math.Max(0.0f, waitTime - elapsedTime);
// if wait time is finished
if (waitTime == 0)
{
// add powerup spawn animated sprite
game.AddAnimSprite(AnimSpriteType.Spawn,
transform.Translation, 50, 40, 30, DrawMode.Additive, -1);
// play powerup spawn sound
game.PlaySound3D("powerup_spawn", transform.Translation);
}
// return true to keep powerup alive
return(true);
}
// calculate bobbing angles
float turn_angle = (this.elapsedTime * GameOptions.PowerupTurnSpeed) %
MathHelper.TwoPi;
float move_angle = (this.elapsedTime * GameOptions.PowerupMoveSpeed) %
MathHelper.TwoPi;
// create bobbing matrix
bobbing = Matrix.CreateRotationY(turn_angle) *
Matrix.CreateTranslation((float)Math.Cos(move_angle) *
GameOptions.PowerupMoveDistance * Vector3.Up);
// check for any player at the powerup location
int playerHit = game.GetPlayerAtPosition(transform.Translation);
if (playerHit != -1)
{
// disable powerup until respawn time
waitTime = GameOptions.PowerupRespawnTime;
// get player at powerup location
PlayerShip p = game.GetPlayer(playerHit);
switch (powerupType)
{
case PowerupType.Energy:
p.AddEnergy(0.5f); // add 50% energy
break;
case PowerupType.Missile:
p.AddMissile(3); // add 3 missiles
break;
}
// add powerup spawn animates sprite
game.AddAnimSprite(AnimSpriteType.Spawn,
transform.Translation, 40, 40, 30, DrawMode.Additive, -1);
// play powerup get sound
game.PlaySound("powerup_get");
}
// return true to keep powerup alive
return(true);
}
/// <summary>
/// Load the game files (level, ships, wepons, etc...)
/// </summary>
public void LoadFiles(ContentManager content)
{
String level = levelFile + "/" + levelFile;
// load level model
levelColor = content.Load<Model>("levels/" + level);
// load collision model
Model collisionModel = content.Load<Model>(
"levels/" + level + "_collision");
levelCollision = new CollisionMesh(collisionModel,
GameOptions.CollisionMeshSubdivisions);
collisionModel = null;
// load spawns and lights
levelSpawns = EntityList.Load("content/levels/" + level + "_spawns.xml");
levelLights = LightList.Load("content/levels/" + level + "_lights.xml");
// load particle textures
if (particleTextures == null)
{
int i, j = particleFiles.GetLength(0);
particleTextures = new Texture2D[j];
for (i = 0; i < j; i++)
particleTextures[i] = content.Load<Texture2D>(
"particles/" + particleFiles[i]);
}
// load animated sprite textures
if (animatedSpriteTextures == null)
{
int i, j = animatedSpriteFiles.GetLength(0);
animatedSpriteTextures = new Texture2D[j];
for (i = 0; i < j; i++)
animatedSpriteTextures[i] = content.Load<Texture2D>(
"explosions/" + animatedSpriteFiles[i]);
}
// load projectile models
if (projectileModels == null)
{
int i, j = projectileFiles.GetLength(0);
projectileModels = new Model[j];
for (i = 0; i < j; i++)
projectileModels[i] = content.Load<Model>(
"projectiles/" + projectileFiles[i]);
}
// load powerup models
if (powerupModels == null)
{
int i, j = powerupFiles.GetLength(0);
powerupModels = new Model[j];
for (i = 0; i < j; i++)
powerupModels[i] = content.Load<Model>(
"powerups/" + powerupFiles[i]);
}
// cerate players
for (int i = 0; i < GameOptions.MaxPlayers; i++)
if (shipFile[i] != null)
{
Model ShipModel = content.Load<Model>(
"ships/" + shipFile[i]);
EntityList ShipEnities = EntityList.Load(
"content/ships/" + shipFile[i] + ".xml");
players[i] = new PlayerShip(this, i,
ShipModel, ShipEnities, GameOptions.CollisionBoxRadius);
}
else
players[i] = null;
// create powerups
EntityList powerups = EntityList.Load(
"content/levels/" + level + "_powerups.xml");
foreach (Entity entity in powerups.Entities)
{
switch (entity.name)
{
case "energy":
AddPowerup(PowerupType.Energy, entity.transform);
break;
case "missile":
AddPowerup(PowerupType.Missile, entity.transform);
break;
}
}
// load hud textures
if (gameMode == GameMode.SinglePlayer)
{
hudCrosshair = content.Load<Texture2D>(
"screens/hud_sp_crosshair");
hudEnergy = content.Load<Texture2D>(
"screens/hud_sp_energy");
hudMissile = content.Load<Texture2D>(
"screens/hud_sp_missile");
hudScore = content.Load<Texture2D>(
"screens/hud_sp_score");
hudBars = content.Load<Texture2D>(
"screens/hud_sp_bars");
}
else
{
hudCrosshair = content.Load<Texture2D>(
"screens/hud_mp_crosshair");
hudEnergy = content.Load<Texture2D>(
"screens/hud_mp_energy");
hudMissile = content.Load<Texture2D>(
"screens/hud_mp_missile");
hudScore = content.Load<Texture2D>(
"screens/hud_mp_score");
hudBars = content.Load<Texture2D>(
"screens/hud_mp_bars");
}
// load damage indicator texture
damageTexture = content.Load<Texture2D>("screens/damage");
}
