public static void StartFalling(this Entity2D entity, Vector2D velocity, Vector2D gravity)
{
AddSimplePhysicsDataIfNeeded(entity);
entity.Get <SimplePhysics.Data>().Velocity = velocity;
entity.Get <SimplePhysics.Data>().Gravity = gravity;
entity.Start <SimplePhysics.Move>();
}
private static void AddSimplePhysicsDataIfNeeded(Entity2D entity)
{
if (!entity.Contains <SimplePhysics.Data>())
{
entity.Add(new SimplePhysics.Data());
}
}
private static void UpdateDuration(Entity2D entity, Data physics)
{
physics.Elapsed += Time.Delta;
if (physics.Duration > 0.0f && physics.Elapsed >= physics.Duration)
{
entity.Dispose();
}
}
public static void StartBouncingOffScreenEdges(this Entity2D entity, Vector2D velocity,
Action bounced)
{
AddSimplePhysicsDataIfNeeded(entity);
entity.Get <SimplePhysics.Data>().Velocity = velocity;
entity.Get <SimplePhysics.Data>().Bounced = bounced;
entity.Start <SimplePhysics.Move>();
entity.Start <SimplePhysics.BounceIfAtScreenEdge>();
}
private static void UpdatePhysics(Entity2D entity, Data physics)
{
physics.Velocity += physics.Gravity * Time.Delta;
entity.Center += physics.Velocity * Time.Delta;
physics.Elapsed += Time.Delta;
if (physics.Duration > 0.0f && physics.Elapsed >= physics.Duration)
{
entity.IsActive = false;
}
}
public static void StartRotating(this Entity2D entity, float rotationSpeed)
{
AddSimplePhysicsDataIfNeeded(entity);
entity.Get <SimplePhysics.Data>().RotationSpeed = rotationSpeed;
entity.Start <SimplePhysics.Rotate>();
}