/// <summary>
/// Removes a Game object from the axis
/// </summary>
/// <param name="gameObject">The game object to remove</param>
private void RemoveGameObject(GameObject gameObject)
{
uint id = gameObject.ID;
// Remove the game object from our list of all game objects
gameObjects.Remove(id);
// Remove the game object from our collection of collisions
int i = collisions.Count - 1;
while (i >= 0)
{
CollisionPair pair = collisions.ElementAt(i);
if (pair.A == id || pair.B == id)
collisions.Remove(pair);
i--;
}
// Remove the game object from our collection of overlaps
i = horizontalOverlaps.Count - 1;
while (i >= 0)
{
CollisionPair pair = horizontalOverlaps.ElementAt(i);
if (pair.A == id || pair.B == id)
horizontalOverlaps.Remove(pair);
i--;
}
i = verticalOverlaps.Count - 1;
while (i >= 0)
{
CollisionPair pair = verticalOverlaps.ElementAt(i);
if (pair.A == id || pair.B == id)
verticalOverlaps.Remove(pair);
i--;
}
BoundingBox box=null;
// Grab the game object's bounding box
try
{
box = boundingBoxes[id];
}
catch
{
}
// Remove the game objects' bounds from our horizontal axis lists
if (box != null)
{
horizontalAxis.Remove(box.Left);
horizontalAxis.Remove(box.Right);
verticalAxis.Remove(box.Top);
verticalAxis.Remove(box.Bottom);
}
// Remove the game object's bounding box
boundingBoxes.Remove(id);
}
/// <summary>
/// Helper method that adds a GameObject to the GameObjectManager
/// </summary>
/// <param name="gameObject">The Game Object to add</param>
private void AddGameObject(GameObject gameObject)
{
uint id = gameObject.ID;
// Store the game object in our list of all game objects
gameObjects.Add(id, gameObject);
// Create the game object's bounding box
BoundingBox box = new BoundingBox(id, gameObject.Bounds);
boundingBoxes.Add(id, box);
// Store the game object's bounds in our horizontal axis list
int leftIndex = InsertBoundIntoAxis(horizontalAxis, box.Left);
int rightIndex = InsertBoundIntoAxis(horizontalAxis, box.Right);
// Grab any game object ids for game objects whose bounds fall
// between the min and max bounds of our new game object
for (int i = leftIndex + 1; i < rightIndex; i++)
{
horizontalOverlaps.Add(new CollisionPair(id, horizontalAxis[i].Box.GameObjectID));
}
// Store the new game object's bounds in our vertical axis list
int topIndex = InsertBoundIntoAxis(verticalAxis, box.Top);
int bottomIndex = InsertBoundIntoAxis(verticalAxis, box.Bottom);
// Grab any game object ids for game objects whose bounds fall
// between the min and max of our new game object
for (int i = topIndex + 1; i < bottomIndex; i++)
{
verticalOverlaps.Add(new CollisionPair(id, verticalAxis[i].Box.GameObjectID));
}
}
/// <summary>
/// Helper method for enqueueing our game object for creation at the
/// start of the next update cycle.
/// </summary>
/// <param name="go">The ready-to-spawn game object</param>
private void QueueGameObjectForCreation(GameObject go)
{
createdGameObjects.Enqueue(go);
}
/// <summary>
/// Removes a Game object from the axis
/// </summary>
/// <param name="gameObject">The game object to remove</param>
private void RemoveGameObject(GameObject gameObject)
{
uint id = gameObject.ID;
// Remove the game object from our list of all game objects
gameObjects.Remove(id);
// Remove the game object from our collection of collisions
CollisionPair[] pairs = collisions.ToArray();
foreach (CollisionPair pair in pairs)
{
if (pair.A == id || pair.B == id)
{
collisions.Remove(pair);
}
}
// Remove the game object from our collection of overlaps
CollisionPair[] pairs2 = verticalOverlaps.ToArray();
foreach (CollisionPair pair in pairs2)
{
if (pair.A == id || pair.B == id)
{
verticalOverlaps.Remove(pair);
}
}
// Grab the game object's bounding box
BoundingBox box;
try
{
box = boundingBoxes[id];
}
catch (KeyNotFoundException ke)
{
return;
}
// Remove the game objects' bounds from our vertical axis lists
verticalAxis.Remove(box.Top);
verticalAxis.Remove(box.Bottom);
// Remove the game object's bounding box
boundingBoxes.Remove(id);
}