public override void Update(double dt)
{
for (int i = 0; i < Particles.Count; i++)
{
for (int j = 0; j < GravityPoints.Count; j++)
{
var particle = Particles[i];
var gravityPoint = GravityPoints[j];
var normDir = Vec2.Direction(particle.Position, gravityPoint).Normalize();
particle.Velocity += normDir * particle.Speed * dt;
particle.Position += particle.Velocity * dt;
Particles[i] = particle;
}
}
}