//////////////////////////////////////////////////////////////////////////////
#region Collider
protected override bool HandleCollision(MovableCell other)
{
Debug.Assert(isActive);
if (other.IsPlayer())
{
return(other.AsPlayer().HandleCollision(this));
}
if (other.IsBomb())
{
return(HandleCollision(other.AsBomb()));
}
if (other.IsObstacle())
{
return(HandleObstacleCollistion(other));
}
return(false);
}
protected override bool HandleCollision(MovableCell other)
{
Debug.Assert(isActive);
if (other.IsPlayer())
{
return other.AsPlayer().HandleCollision(this);
}
if (other.IsBomb())
{
return HandleCollision(other.AsBomb());
}
if (other.IsObstacle())
{
return HandleObstacleCollistion(other);
}
return false;
}
private void RemoveMovable(MovableCell cell)
{
if (cell.addedToList)
{
movableCells.Remove(cell);
cell.addedToList = false;
}
}
private bool CheckWallCollisions(MovableCell movable)
{
float dx = movable.moveDx;
float dy = movable.moveDy;
if (dx > 0)
{
float maxX = GetMaxPx();
if (movable.GetPx() > maxX)
{
movable.SetPosX(maxX);
movable.HandleWallCollision();
return true;
}
}
else if (dx < 0)
{
float minX = GetMinPx();
if (movable.GetPx() < minX)
{
movable.SetPosX(minX);
movable.HandleWallCollision();
return true;
}
}
if (dy > 0)
{
float maxY = GetMaxPy();
if (movable.GetPy() > maxY)
{
movable.SetPosY(maxY);
movable.HandleWallCollision();
return true;
}
}
else if (dy < 0)
{
float minY = GetMinPy();
if (movable.GetPy() < minY)
{
movable.SetPosY(minY);
movable.HandleWallCollision();
return true;
}
}
return false;
}
private bool CheckStillCollisions(MovableCell movable, FieldCellSlot slot)
{
if (slot != null)
{
FieldCell staticCell = slot.staticCell;
if (staticCell != null)
{
return CheckCollision(movable, staticCell);
}
bool handled = false;
List<MovableCell> movableCells = slot.movableCells;
for (int i = 0; i < movableCells.Count; ++i)
{
MovableCell other = movableCells[i];
if (!other.IsMoving() && movable != other)
{
handled |= CheckCollision(movable, other);
}
}
return handled;
}
return false;
}
/* Checks collision with static cells (bricks and solids) + still movable obstacles (not moving bombs) */
private bool CheckStillCellsCollisions(MovableCell movable)
{
int cx = movable.cx;
int cy = movable.cy;
int stepX = Math.Sign(movable.px - movable.CellCenterPx());
int stepY = Math.Sign(movable.py - movable.CellCenterPy());
bool hasStepX = stepX != 0;
bool hasStepY = stepY != 0;
bool hasCollision = false;
hasCollision |= CheckStillCollisions(movable, GetSlot(cx, cy));
if (hasStepX && hasStepY)
{
hasCollision |= CheckStillCollisions(movable, GetSlot(cx + stepX, cy));
hasCollision |= CheckStillCollisions(movable, GetSlot(cx, cy + stepY));
hasCollision |= CheckStillCollisions(movable, GetSlot(cx + stepX, cy + stepY));
}
else if (hasStepX)
{
hasCollision |= CheckStillCollisions(movable, GetSlot(cx + stepX, cy));
}
else if (hasStepY)
{
hasCollision |= CheckStillCollisions(movable, GetSlot(cx, cy + stepY));
}
return hasCollision;
}
private bool CheckCollision(MovableCell c1, FieldCell c2)
{
return c1.Collides(c2) && c1.HandleCollision(c2);
}
private void AddMovable(MovableCell cell)
{
if (!cell.addedToList)
{
cell.addedToList = true;
// added into the list sorted bombs first, players next
for (LinkedListNode<MovableCell> node = movableCells.First; node != null; node = node.Next)
{
if (cell.type <= node.Value.type)
{
movableCells.AddBefore(node, cell);
return;
}
}
movableCells.AddLast(cell);
}
}
public void MovableCellChanged(MovableCell movable, int oldCx, int oldCy)
{
AddCell(movable);
}
public bool CheckStaticCollisions(MovableCell movable)
{
bool hasCollision = false;
hasCollision |= CheckWallCollisions(movable);
hasCollision |= CheckStillCellsCollisions(movable);
return hasCollision;
}
/* Movable cell */
protected virtual bool HandleCollision(MovableCell other)
{
return(false);
}
protected override bool HandleCollision(MovableCell other)
{
if (other.IsBomb())
{
return HandleCollision(other.AsBomb());
}
if (other.IsPlayer())
{
return HandleCollision(other.AsPlayer());
}
return false;
}
/* Movable cell */
protected virtual bool HandleCollision(MovableCell other)
{
return false;
}