internal static bool BoundingIntersectWithLine(Bounding bounding, LitMath.Line2 line) { Bounding lineBound = new Bounding(line.startPoint, line.endPoint); if (!bounding.IntersectWith(lineBound)) { return(false); } if (bounding.Contains(line.startPoint) || bounding.Contains(line.endPoint)) { return(true); } LitMath.Vector2 pkPnt1 = new LitMath.Vector2(bounding.left, bounding.bottom); LitMath.Vector2 pkPnt2 = new LitMath.Vector2(bounding.left, bounding.top); LitMath.Vector2 pkPnt3 = new LitMath.Vector2(bounding.right, bounding.top); LitMath.Vector2 pkPnt4 = new LitMath.Vector2(bounding.right, bounding.bottom); double d1 = LitMath.Vector2.Cross(line.startPoint - pkPnt1, line.endPoint - pkPnt1); double d2 = LitMath.Vector2.Cross(line.startPoint - pkPnt2, line.endPoint - pkPnt2); double d3 = LitMath.Vector2.Cross(line.startPoint - pkPnt3, line.endPoint - pkPnt3); double d4 = LitMath.Vector2.Cross(line.startPoint - pkPnt4, line.endPoint - pkPnt4); if (d1 * d2 <= 0 || d1 * d3 <= 0 || d1 * d4 <= 0) { return(true); } else { return(false); } }
internal override bool Cross(Bounding selectBound, Entity entity) { Text text = entity as Text; if (text == null) { return(false); } Bounding textBound = text.bounding; if (selectBound.Contains(textBound)) { return(true); } if (textBound.IntersectWith(selectBound)) { return(true); } else { return(false); } }
internal override bool Cross(Bounding selectBound, Entity entity) { XPoint xPoint = entity as XPoint; if (xPoint == null) { return(false); } Bounding xPointBound = xPoint.bounding; return(selectBound.Contains(xPointBound) || xPointBound.IntersectWith(selectBound)); }
internal override bool Cross(Bounding selectBound, Entity entity) { Arc arc = entity as Arc; if (arc == null) { return(false); } Bounding arcBounding = arc.bounding; if (selectBound.Contains(arcBounding)) { return(true); } if (!selectBound.IntersectWith(arcBounding)) { return(false); } Circle circle = new Circle(arc.center, arc.radius); LitMath.Vector2 nearestPntOnBound = new LitMath.Vector2( Math.Max(selectBound.left, Math.Min(circle.center.x, selectBound.right)), Math.Max(selectBound.bottom, Math.Min(circle.center.y, selectBound.top))); if (LitMath.Vector2.Distance(nearestPntOnBound, circle.center) <= circle.radius) { double bdLeft = selectBound.left; double bdRight = selectBound.right; double bdTop = selectBound.top; double bdBottom = selectBound.bottom; List <LitMath.Vector2> pnts = new List <LitMath.Vector2>(); pnts.Add(new LitMath.Vector2(bdLeft, bdTop)); pnts.Add(new LitMath.Vector2(bdLeft, bdBottom)); pnts.Add(new LitMath.Vector2(bdRight, bdTop)); pnts.Add(new LitMath.Vector2(bdRight, bdBottom)); LitMath.Vector2 xp = new LitMath.Vector2(1, 0); foreach (LitMath.Vector2 pnt in pnts) { if (LitMath.Vector2.Distance(pnt, circle.center) >= circle.radius) { LitMath.Vector2 v = pnt - circle.center; double rad = LitMath.Vector2.AngleInRadian(xp, v); if (LitMath.Vector2.Cross(xp, v) < 0) { rad = Math.PI * 2 - rad; } if (AngleInRange(rad, arc.startAngle, arc.endAngle)) { return(true); } } } return(false); } else { return(false); } }
internal override bool Cross(Bounding selectBound, Entity entity) { Arc arc = entity as Arc; if (arc == null) { return(false); } Bounding arcBounding = arc.Bounding; if (selectBound.Contains(arcBounding)) { return(true); } if (!selectBound.IntersectWith(arcBounding)) { return(false); } Circle circle = new Circle(arc.center, arc.radius); CADPoint nearestPntOnBound = new CADPoint( System.Math.Max(selectBound.left, System.Math.Min(circle.center.X, selectBound.right)), System.Math.Max(selectBound.bottom, System.Math.Min(circle.center.Y, selectBound.top))); if (CADPoint.Distance(nearestPntOnBound, circle.center) <= circle.radius) { double bdLeft = selectBound.left; double bdRight = selectBound.right; double bdTop = selectBound.top; double bdBottom = selectBound.bottom; List <CADPoint> pnts = new List <CADPoint>(); pnts.Add(new CADPoint(bdLeft, bdTop)); pnts.Add(new CADPoint(bdLeft, bdBottom)); pnts.Add(new CADPoint(bdRight, bdTop)); pnts.Add(new CADPoint(bdRight, bdBottom)); CADVector xp = new CADVector(1, 0); foreach (CADPoint pnt in pnts) { if (CADPoint.Distance(pnt, circle.center) >= circle.radius) { CADVector v = pnt - circle.center; double rad = CADVector.AngleInRadian(xp, v); if (CADVector.Cross(xp, v) < 0) { rad = System.Math.PI * 2 - rad; } if (AngleInRange(rad, arc.startAngle, arc.endAngle)) { return(true); } } } return(false); } else { return(false); } }