/// <summary>
/// Determines whether a <see cref="MyOrientedBoundingBox"/> contains a <see cref="MyBoundingSphere"/>.
/// </summary>
/// <param name="sphere">The sphere to test.</param>
/// <param name="IgnoreScale">Optimize the check operation by assuming that <see cref="MyOrientedBoundingBox"/> has no scaling applied</param>
/// <returns>The type of containment the two objects have.</returns>
/// <remarks>
/// This method is not designed for <see cref="MyOrientedBoundingBox"/> which has a non-uniform scaling applied to its transformation matrix.
/// But any type of scaling applied using Scale method will keep this method accurate.
/// </remarks>
public MyContainmentType Contains(MyBoundingSphere sphere, bool IgnoreScale = false)
{
MyMatrix invTrans;
MyMatrix.Invert(ref Transformation, out invTrans);
// Transform sphere center into the obb coordinates
MyVector3 locCenter;
MyVector3.TransformCoordinate(ref sphere.Center, ref invTrans, out locCenter);
float locRadius;
if (IgnoreScale)
locRadius = sphere.Radius;
else
{
// Transform sphere radius into the obb coordinates
MyVector3 vRadius = MyVector3.UnitX * sphere.Radius;
MyVector3.TransformNormal(ref vRadius, ref invTrans, out vRadius);
locRadius = vRadius.Length();
}
//Perform regular BoundingBox to BoundingSphere containment check
MyVector3 minusExtens = -Extents;
MyVector3 vector;
MyVector3.Clamp(ref locCenter, ref minusExtens, ref Extents, out vector);
float distance = MyVector3.DistanceSquared(locCenter, vector);
if (distance > locRadius * locRadius)
return MyContainmentType.Disjoint;
if ((((minusExtens.X + locRadius <= locCenter.X) && (locCenter.X <= Extents.X - locRadius)) && ((Extents.X - minusExtens.X > locRadius) &&
(minusExtens.Y + locRadius <= locCenter.Y))) && (((locCenter.Y <= Extents.Y - locRadius) && (Extents.Y - minusExtens.Y > locRadius)) &&
(((minusExtens.Z + locRadius <= locCenter.Z) && (locCenter.Z <= Extents.Z - locRadius)) && (Extents.Z - minusExtens.Z > locRadius))))
{
return MyContainmentType.Contains;
}
return MyContainmentType.Intersects;
}
