public static Vector2f GetVelocity(Vector2f velocity, Vector2f force,
float mass) {
Vector2f acceleration = new Vector2f(force.GetX() / mass, force.GetY()
/ mass);
velocity.Add(acceleration);
return velocity;
}
public static Vector2f ElasticForce(Vector2f displacement,
float forceConstant) {
float forceX = -forceConstant * displacement.GetX();
float forceY = -forceConstant * displacement.GetY();
Vector2f theForce = new Vector2f(forceX, forceY);
return theForce;
}
public void GetClosestPoint(Vector2f point, Vector2f result)
{
loc.Set(point);
loc.Sub(start);
float projDistance = vec.Dot(loc);
projDistance /= vec.LengthSquared();
if (projDistance < 0)
{
result.Set(start);
return;
}
if (projDistance > 1)
{
result.Set(end);
return;
}
result.x = start.GetX() + projDistance * vec.GetX();
result.y = start.GetY() + projDistance * vec.GetY();
}
public void UpdateLocation(Vector2f vector)
{
this.SetX(MathUtils.Round(vector.GetX()));
this.SetY(MathUtils.Round(vector.GetY()));
}
public float GetDY()
{
return(end.GetY() - start.GetY());
}
