public List <ViewGeometry> OnCheckCollision()
{
List <ViewGeometry> collisions = new List <ViewGeometry>();
foreach (var collision in CollisionMap.Where(p => Name != p.Name).ToDictionary(p => p.Geometry, o => o))
{
bool isCollision = CollisionManager.CalculateCollision(Geometry, collision.Key);
if (isCollision)
{
collisions.Add(collision.Value);
}
}
foreach (var item in collisions)
{
if (!CurrentCollisions.Any(p => p == item))
{
CurrentCollisions.Add(item);
}
if (!item.CurrentCollisions.Any(p => p == this))
{
item.CurrentCollisions.Add(this);
}
if (item.CheckCollision != null)
{
item.CheckCollision(item.CurrentCollisions);
}
}
foreach (var item in PreviousCollisions)
{
if (!collisions.Any(p => p == item))
{
CurrentCollisions.Remove(item);
item.CurrentCollisions.Remove(this);
if (item.CheckCollision != null)
{
item.CheckCollision(item.CurrentCollisions);
}
}
}
PreviousCollisions = CurrentCollisions.ToList();
if (CheckCollision != null)
{
CheckCollision(CurrentCollisions);
}
return(collisions);
}
/// <summary>
/// Called every frame by the CollidableObject, which is called every frame by the Game1 class.
/// Updates a Rectangle at the location of the Host GameObject each frame.
/// </summary>
/// <param name="gameTime"></param>
public void Update(GameTime gameTime)
{
//Don't bother checking collisions if not active
if (!Host.Active)
{
return;
}
UpdateHitbox();
if (!ChecksCollisions)
{
return;
}
foreach (CollidableObject c in GameManager.CollidableObjectsInView)
{
if (!c.Active)
{
continue;
}
//Don't check collisions with yourself!
if (c.Name == Host.Name)
{
continue;
}
//If we intersect with a new object
if (Hitbox.Intersects(c.Coll.Hitbox) && !CurrentCollisions.Contains(c.Coll))
{
CurrentCollisions.Add(c.Coll);
OnCollision(c.Coll);
}
//If stop intersecting with an object we just were intersecting with
if (!Hitbox.Intersects(c.Coll.Hitbox) && CurrentCollisions.Contains(c.Coll))
{
OnCollisionExit(c.Coll);
CurrentCollisions.Remove(c.Coll);
}
}
}