/// <summary>
/// Constructs a new particle emitter object.
/// </summary>
public ParticleEmitter(ParticleSystem particleSystem,
float particlesPerSecond, Vector3 initialPosition)
{
this.particleSystem = particleSystem;
timeBetweenParticles = 1.0f / particlesPerSecond;
previousPosition = initialPosition;
}
/// <summary>
/// Constructs a new projectile.
/// </summary>
public Projectile(ParticleSystem explosionParticles,
ParticleSystem explosionSmokeParticles,
ParticleSystem projectileTrailParticles,
Vector3 startPosition,
float lifeSpan)
{
this.explosionParticles = explosionParticles;
this.explosionSmokeParticles = explosionSmokeParticles;
this.projectileParticleSystem = projectileTrailParticles;
// Start at the origin, firing in a random (but roughly upward) direction.
position = startPosition;
projectileLifespan = lifeSpan;
velocity.X = (float)(random.NextDouble() - 0.5) * sidewaysVelocityRange;
velocity.Y = (float)(random.NextDouble() - 0.5) * verticalVelocityRange;
velocity.Z = (float)(random.NextDouble() - 0.5) * sidewaysVelocityRange;
// Use the particle emitter helper to output our trail particles.
trailEmitter = new ParticleEmitter(projectileTrailParticles,
trailParticlesPerSecond, position);
}
