public override void Update()
{
base.Update();
// Static bodies need not update any of their physics, as they are immune to all forces
if (!flagBodyType.HasFlag(PhysicsEngine.BodyType.STATIC))
{
velocity_last = velocity;
position_last = transform.parent.Position;
// If a body has been established to operate according to world forces
if (flagBodyType.HasFlag(PhysicsEngine.BodyType.WORLDFORCE))
{
force += PhysicsEngine.PhysicsSettings.WORLD_FORCE;
}
// Simple bodies do not have no rotational motion
if (!flagBodyType.HasFlag(PhysicsEngine.BodyType.SIMPLE))
{
// TODO Implement Rotational Motion
}
// Use of mass_i saves having to do the more expensive / operator, in favour of doing it once whenever mass is set/changed
acceleration = force * mass_i;
// TODO Implement Verlet Integration technique for motion (mabs)
velocity = velocity + 0.5f * acceleration * Time.DeltaTime * Time.DeltaTime;
transform.parent.Position += velocity;
force = Vector3.Zero;
PhysicsEngine.AddPhysicsBody(this);
}
List <PhysicsBody2D> collisionTests = PhysicsEngine.GetCollisionPass(this);
List <PhysicsBody2D> checkedAlready = new List <PhysicsBody2D>();
foreach (PhysicsBody2D collider in collisionTests)
{
if (!checkedAlready.Contains(collider) && collider != this)
{
Collision2D possibleCollision = Collision2D.Evaluate(this, collider);
if (possibleCollision != null && !collisions.Contains(possibleCollision))
{
collisions.Add(possibleCollision);
collider.collisions.Add(possibleCollision);
}
checkedAlready.Add(collider);
}
}
foreach (Collision2D collision in collisions)
{
if (collision.BodyA == this)
{
collision.Resolve();
}
}
foreach (Collision2D collision in collisions_dead)
{
collisions.Remove(collision);
}
collisions_dead = new List <Collision2D>();
}