/// <summary>
/// Checks if the given object is within the borders of the viewport.
/// </summary>
/// <param name="o"></param>
/// <returns></returns>
public bool IsOnScreen(GameplayObject g)
{
Point a = g.Pos;
Point b = new Point(g.SpriteWidth, g.SpriteHeight);
return(new Rectangle(Camera.Pos, new Point(ScreenWidth, ScreenHeight)).Intersects(new Rectangle(a, b)));
}
public int Compare(object a, object b)
{
// Assertions and type identification
Debug.Assert(a != null, "Violation of : a is not null.");
Debug.Assert(b != null, "Violation of : b is not null.");
Type[] types = { typeof(GameplayObject) };
Type typeOfA = null;
Type typeOfB = null;
foreach (Type t in types)
{
if (a.GetType().IsSubclassOf(t))
{
typeOfA = t;
}
if (b.GetType().IsSubclassOf(t))
{
typeOfB = t;
}
}
Debug.Assert(typeOfA != null, "Violation of : a is of drawable type.");
Debug.Assert(typeOfB != null, "Violation of : b is of drawable type.");
int aX = 0, aY = 0, bX = 0, bY = 0;
// Get coordinates of a.
if (typeOfA == typeof(GameplayObject))
{
GameplayObject temp = (GameplayObject)a;
aX = temp.Pos.X;
aY = temp.Pos.Y;
}
// Get coordinates of b.
if (typeOfB == typeof(GameplayObject))
{
GameplayObject temp = (GameplayObject)b;
bX = temp.Pos.X;
bY = temp.Pos.Y;
}
// Compare.
if (aY > bY)
{
return(1);
}
else if (aY < bY)
{
return(-1);
}
else // aY == bY
{
if (aX > bX)
{
return(1);
}
else if (aX < bX)
{
return(-1);
}
else // aX == bX
{
return(0);
}
}
}