/// <summary>
/// Updates the projectile.
/// </summary>
public bool Update(GameTime gameTime)
{
float elapsedTime = (float)gameTime.ElapsedGameTime.TotalSeconds;
// Simple projectile physics.
position += velocity * elapsedTime;
velocity.Y -= elapsedTime * gravity;
age += elapsedTime;
// Update the particle emitter, which will create our particle trail.
trailEmitter.Update(gameTime, position);
// If enough time has passed, explode! Note how we pass our velocity
// in to the AddParticle method: this lets the explosion be influenced
// by the speed and direction of the projectile which created it.
if (age > projectileLifespan)
{
for (int i = 0; i < numExplosionParticles; i++)
{
explosionParticles.AddParticle(position, velocity);
}
for (int i = 0; i < numExplosionSmokeParticles; i++)
{
explosionSmokeParticles.AddParticle(position, velocity);
}
return(false);
}
return(true);
}
