public IEnumerable <Collision> Cast(Bounds bounds)
{
foreach (Collider rigidbody in _colliders.Get(bounds))
{
var intersection = bounds.intersection(rigidbody.bounds);
if (intersection.HasValue)
{
yield return(new Collision(rigidbody, intersection.Value));
}
}
}
private ISpatial Cast <T>(int x0, int y0, int x1, int y1, out Vector2 finalPoint)
{
int dx = Math.Abs(x1 - x0);
int dy = Math.Abs(y1 - y0);
int sx = 0;
int sy = 0;
if (x0 < x1)
{
sx = 1;
}
else
{
sx = -1;
}
if (y0 < y1)
{
sy = 1;
}
else
{
sy = -1;
}
int err = dx - dy;
int e2;
while (true)
{
finalPoint = new Vector2(x0, y0);
var res = _mapSpatialCollection.GetMany(finalPoint).OfType <T>();
if (res.Count() > 0)
{
return(_mapSpatialCollection.Get(finalPoint));
}
if ((x0 == x1) && (y0 == y1))
{
break;
}
e2 = err << 1;
if (e2 > -dy)
{
err = err - dy;
x0 = x0 + sx;
}
if (e2 < dx)
{
err = err + dx;
y0 = y0 + sy;
}
}
return(null);
}
/// <summary>
/// Gets the first <see cref="IUsableEntity"/> that intersects a specified area.
/// </summary>
/// <param name="c">The <see cref="ISpatialCollection"/>.</param>
/// <param name="rect"><see cref="Rectangle"/> of the area to check.</param>
/// <param name="charEntity"><see cref="CharacterEntity"/> that must be able to use the
/// <see cref="IUsableEntity"/>.</param>
/// <returns>First <see cref="IUsableEntity"/> that intersects the specified area that the
/// <paramref name="charEntity"/> is able to use, or null if none.</returns>
public static IUsableEntity GetUsable(this ISpatialCollection c, Rectangle rect, CharacterEntity charEntity)
{
return(c.Get <IUsableEntity>(rect, x => x.CanUse(charEntity)));
}