// Helper method for compiting the bounds of a set of points. The given point
// is added to the bounds of the given Rect3D. The point/bounds are both passed
// by reference for perf. Only the bounds may be modified.
private static void AddPointToBounds(ref Point3D point, ref Rect3D bounds)
{
Debug.Assert(!bounds.IsEmpty,
"Caller should construct the Rect3D from the first point before calling this method.");
if (point.X < bounds.X)
{
bounds.SizeX += (bounds.X - point.X);
bounds.X = point.X;
}
else if (point.X > (bounds.X + bounds.SizeX))
{
bounds.SizeX = point.X - bounds.X;
}
if (point.Y < bounds.Y)
{
bounds.SizeY += (bounds.Y - point.Y);
bounds.Y = point.Y;
}
else if (point.Y > (bounds.Y + bounds.SizeY))
{
bounds.SizeY = point.Y - bounds.Y;
}
if (point.Z < bounds.Z)
{
bounds.SizeZ += (bounds.Z - point.Z);
bounds.Z = point.Z;
}
else if (point.Z > (bounds.Z + bounds.SizeZ))
{
bounds.SizeZ = point.Z - bounds.Z;
}
#if NEVER
// Because we do not store rectangles as TLRB (+ another dimension in 3D)
// we need to compute SizeX/Y/Z which involves subtraction and introduces
// cancelation so this assert isn't accurate.
Debug.Assert(bounds.Contains(point),
"Error detect - bounds did not contain point on exit.");
#endif
}
/// <summary>
/// Returns true if either rectangle is inside the other or touching
/// </summary>
public static bool OverlapsWith(this Rect3D thisRect, Rect3D rect)
{
return thisRect.IntersectsWith(rect) || thisRect.Contains(rect) || rect.Contains(thisRect);
}
