BoxDiagrams.DiagramGestureAnalyzer.ShouldErase C# (CSharp) Метод

		private bool ShouldErase(Shape s, List<PointT> mouseInput)
		{
			var mouseBBox = mouseInput.ToBoundingBox();
			var line = s as LineOrArrow;
			if (line != null)
			{
				// Count the number of crossings
				int crossings = 0;
				float lineLen = 0;
				if (line.BBox.Overlaps(mouseBBox))
					foreach (var seg in AsLineSegments(line.Points))
					{
						lineLen += seg.Length();
						if (seg.ToBoundingBox().Overlaps(mouseBBox))
							crossings += FindIntersectionsWith(seg, mouseInput, false).Count();
					}
				if (crossings * 40.0f > lineLen)
					return true;
			}
			else
			{
				// Measure how much of the mouse input is inside the bbox
				var bbox = s.BBox;
				if (bbox != null)
				{
					var amtInside = mouseInput.AdjacentPairs()
						.Select(seg => seg.A.To(seg.B).ClipTo(bbox))
						.WhereNotNull()
						.Sum(seg => seg.Length());
					if (amtInside * EraseBoxThreshold > bbox.Area())
						return true;
				}
			}
			return false;
		}