public void addSource(Vector2 position, int period, Particle_Type type)
{
Source source = new Source(position, period, type);
sources.Add(source);
}
public void addSource(Vector2 position, int period, Particle_Type type, bool screenCoord)
{
if(screenCoord)
position = (position + new Vector2(boundry.X, boundry.Y)) / particleSize;
Source source = new Source(position, period, type);
sources.Add(source);
}