/// <summary>
/// DOES NOT WORK. WIP. probably because the additems() doesnt work correctly.
/// </summary>
/// <param name="items"></param>
/// <param name="area"></param>
/// <param name="skipChecks"></param>
public void GetItemsWithinArea(ref List <T> items, ref FRect area, bool skipChecks)
{
if (skipChecks || AABB.Intersects(area))
{
// When the area if entirely within the Cell then skip collision checks on the child nodes
if (area.FullyEncloses(AABB))
{
skipChecks = true;
}
foreach (T item in items)
{
if (skipChecks || item.AABB.Intersects(area))
{
items.Add(item);
}
}
if (!IsLeaf)
{
TopLeft.GetItemsWithinArea(ref items, ref area, skipChecks);
TopRight.GetItemsWithinArea(ref items, ref area, skipChecks);
BottomLeft.GetItemsWithinArea(ref items, ref area, skipChecks);
BottomRight.GetItemsWithinArea(ref items, ref area, skipChecks);
}
}
}
/// <summary>
/// Author: Napoleon.
/// Tested and works.
/// Only apply this to non-rotated rectangles.
/// Touching rectangles don't count in this function
/// </summary>
/// <param name="movingRect">Usually the player or moving object.</param>
/// <param name="staticRect">Usually the wall or something. The collided sides are the sides from this rectangle</param>
/// <returns></returns>
/// <example>
/// if ((collidedSides & Collision.RectSide.Top) == Collision.RectSide.Top)
/// // Top side was hit, do something here
/// </example>
public static RectSide CollidedSidesNoTouch(this FRect movingRect, FRect staticRect)
{
RectSide result = RectSide.None;
if (!movingRect.Intersects(staticRect))
{
return(result); // No intersection at all
}
if (movingRect == staticRect)
{
return(RectSide.Equal);
}
// Left
if (movingRect.Right > staticRect.Left && movingRect.Left < staticRect.Left)
{
result = (result | RectSide.Left);
}
// Top
if (movingRect.Bottom > staticRect.Top && movingRect.Top < staticRect.Top)
{
result = (result | RectSide.Top);
}
// Right
if (movingRect.Left < staticRect.Right && movingRect.Right > staticRect.Right)
{
result = (result | RectSide.Right);
}
// Bottom
if (movingRect.Top < staticRect.Bottom && movingRect.Bottom > staticRect.Bottom)
{
result = (result | RectSide.Bottom);
}
if (result == RectSide.None)
{
return(RectSide.Inside); // moving rectangle is inside the static rectangle
}
return(result);
}
