/// <summary> /// /// </summary> /// <param name="shape"></param> /// <param name="rect"></param> /// <param name="selection"></param> /// <param name="builder"></param> /// <param name="treshold"></param> /// <param name="dx"></param> /// <param name="dy"></param> /// <returns></returns> private static bool HitTest( BaseShape shape, Rect2 rect, Vector2[] selection, ImmutableHashSet <BaseShape> .Builder builder, double treshold, double dx, double dy) { if (shape is XPoint) { if (GetPointBounds(shape as XPoint, treshold, dx, dy).IntersectsWith(rect)) { if (builder != null) { builder.Add(shape); } else { return(true); } } return(false); } else if (shape is XLine) { var line = shape as XLine; if (GetPointBounds(line.Start, treshold, dx, dy).IntersectsWith(rect) || GetPointBounds(line.End, treshold, dx, dy).IntersectsWith(rect) || MathHelpers.LineIntersectsWithRect(rect, new Point2(line.Start.X, line.Start.Y), new Point2(line.End.X, line.End.Y))) { if (builder != null) { builder.Add(line); return(false); } else { return(true); } } return(false); } else if (shape is XEllipse) { if (GetEllipseBounds(shape as XEllipse, dx, dy).IntersectsWith(rect)) { if (builder != null) { builder.Add(shape); return(false); } else { return(true); } } return(false); } else if (shape is XRectangle) { if (GetRectangleBounds(shape as XRectangle, dx, dy).IntersectsWith(rect)) { if (builder != null) { builder.Add(shape); return(false); } else { return(true); } } return(false); } else if (shape is XArc) { if (GetArcBounds(shape as XArc, dx, dy).IntersectsWith(rect)) { if (builder != null) { builder.Add(shape); return(false); } else { return(true); } } return(false); } else if (shape is XBezier) { if (ConvexHullBounds.Overlap(selection, ConvexHullBounds.GetVertices(shape as XBezier, dx, dy))) { if (builder != null) { builder.Add(shape); return(false); } else { return(true); } } return(false); } else if (shape is XQBezier) { if (ConvexHullBounds.Overlap(selection, ConvexHullBounds.GetVertices(shape as XQBezier, dx, dy))) { if (builder != null) { builder.Add(shape); return(false); } else { return(true); } } return(false); } else if (shape is XText) { if (GetTextBounds(shape as XText, dx, dy).IntersectsWith(rect)) { if (builder != null) { builder.Add(shape); return(false); } else { return(true); } } return(false); } else if (shape is XImage) { if (GetImageBounds(shape as XImage, dx, dy).IntersectsWith(rect)) { if (builder != null) { builder.Add(shape); return(false); } else { return(true); } } return(false); } else if (shape is XPath) { if ((shape as XPath).Geometry != null) { var points = (shape as XPath).GetAllPoints(); if (ConvexHullBounds.Overlap(selection, ConvexHullBounds.GetVertices(points, dx, dy))) { if (builder != null) { builder.Add(shape); return(false); } else { return(true); } } } return(false); } else if (shape is XGroup) { if (HitTest((shape as XGroup).Shapes.Reverse(), rect, selection, null, treshold, dx, dy) == true) { if (builder != null) { builder.Add(shape); return(false); } else { return(true); } } return(false); } return(false); }