void RefreshContactSide(VdSegmentUtil.SegmentMarker side) { if (_end1 == null || _end2 == null) { return; } switch (side) { case VdSegmentUtil.SegmentMarker.Side1: double minDist; Point minAnchorPt; ShapeUtils.NearestAnchor(new Point(line.X2, line.Y2), _end1, out anchor1, out minAnchorPt, out minDist); line.X1 = minAnchorPt.X; line.Y1 = minAnchorPt.Y; break; case VdSegmentUtil.SegmentMarker.Side2: ShapeUtils.NearestAnchor(new Point(line.X1, line.Y1), _end2, out anchor2, out minAnchorPt, out minDist); line.X2 = minAnchorPt.X; line.Y2 = minAnchorPt.Y; break; } }