public void Update(double elapsed)
{
for (int i = 0; i < SpringList.Count; i++)
{
Spring spring = SpringList[i];
Spring.SpringForce(ref spring, out Vector2 force);
spring.PointMassA.Force.X += force.X;
spring.PointMassA.Force.Y += force.Y;
spring.PointMassB.Force.X -= force.X;
spring.PointMassB.Force.Y -= force.Y;
}
for (int i = 1; i < PointMassList.Count - 1; i++)
{
PointMassList[i].Velocity.X *= Damping;
PointMassList[i].Velocity.Y *= Damping;
PointMassList[i].Update(elapsed);
}
}
public static void SpringForce(ref Spring spring, out Vector2 forceOut)
{
SpringForce(ref spring.PointMassA.Position, ref spring.PointMassA.Velocity,
ref spring.PointMassB.Position, ref spring.PointMassB.Velocity, spring.D, spring.K, spring.Damping, out forceOut);
}
