internal void UnRegisterSpriteEngine(SpriteEngine engine)
{
lock (_engineList)
{
_engineList.Remove(engine);
}
}
// Register and de-register SpriteEngines - called by the SpriteEngine.Surface setter
internal void RegisterSpriteEngine(SpriteEngine engine)
{
lock (_engineList)
{
_engineList.Add(engine);
SortEngines();
}
}
// Detect collisions against a different sprite engine
internal void PerformCollisionWith(SpriteEngine se)
{
lock (_spriteList)
{
lock (se._spriteList)
{
Sprites.ForEach(s1 => Sprites.Where(s2 => s1.Bounds.IntersectsWith(s2.Bounds)).ToList().ForEach(s2 => _surface.TriggerCollision(s1, s2)));
}
}
}
// Thread animation procedure
protected void AnimateProc()
{
while (Active)
{
// Do we need to render a frame?
if (DateTime.Now > _nextFrameTime)
{
// Determine time stamp that next frame needs to be rendered
_nextFrameTime = DateTime.Now + _animationSpan;
// Process Sprite movement
lock (_engineList)
{
for (int i = 0; i < _engineList.Count; i++)
{
SpriteEngine se = _engineList[i];
se.MoveSprites();
// Handle wrapping around edges
if (WraparoundEdges)
{
se.WrapSprites();
}
// Handle collision detection with itself
if (se.DetectCollisionSelf && SpriteCollision != null)
{
se.PerformSelfCollisionDetection();
}
// Handle collision detection with other engines
for (int k = i + 1; k < _engineList.Count; k++)
{
SpriteEngine se2 = _engineList[k];
if (se.DetectCollisionTag == se2.DetectCollisionTag)
{
se.PerformCollisionWith(se2);
}
}
}
// Remove dead sprites from engines
_engineList.ForEach(se => se.RemoveDeadSprites());
}
// Trigger a repaint of surface
Invalidate();
}
else
{
Thread.Sleep(5);
}
}
}
// IComparable implementation - allows list of SpriteEngines to be sorted
public int CompareTo(object obj)
{
SpriteEngine e2 = (SpriteEngine)obj;
return(e2.Priority - Priority);
}