public void Update()
{
if (SelectedSwarm == null)
{
if (Mouse.IsButtonPressed(Mouse.Button.Left))
{
// select a swarm
Vector2 clickPosition = Program.MousePositionToGameCoordinate();
float distanceToSwarm;
BoundParticleSwarm nearestSwarm = ParticleManager.GetNearestBoundSwarm(clickPosition, out distanceToSwarm);
if(nearestSwarm != null && distanceToSwarm < SwarmSelectRadius)
{
SelectedSwarm = nearestSwarm;
Balken = new TransitionParticleSwarm(SelectedSwarm);
ParticleManager.ParticleSwarms.Add(Balken);
}
}
}
else
{
if (Mouse.IsButtonPressed(Mouse.Button.Left))
{
NumSelectedParticles += SelectingSpeed;
if (NumSelectedParticles > SelectedSwarm.Count)
NumSelectedParticles = SelectedSwarm.Count;
if (NumSelectedParticles >= 1)
{
ParticleManager.TransferParticles(SelectedSwarm, Balken, (int) NumSelectedParticles);
NumSelectedParticles %= 1;
}
}
else
{
Vector2 releasePosition = Program.MousePositionToGameCoordinate();
float distanceToSwarm;
BoundParticleSwarm targetSwarm = ParticleManager.GetNearestBoundSwarm(releasePosition, out distanceToSwarm);
if (distanceToSwarm > SwarmSelectRadius)
{
targetSwarm = null;
}
ParticleManager.ParticleSwarms.Add(Balken.Release(targetSwarm));
ParticleManager.ParticleSwarms.Remove(Balken);
SelectedSwarm = null;
Balken = null;
NumSelectedParticles = 0F;
}
}
}
public void TransferParticles(BoundParticleSwarm from, TransitionParticleSwarm to, int num)
{
List<Particle> transferParticles = from.RemoveRandomParticles(num);
to.AddParticles(transferParticles);
}