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);
}
}
public static DrawAction <T> Inside <T>(Bounding bounds)
{
return((arr, x, y) =>
{
return bounds.Contains(x, y);
});
}
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)
{
Polyline polyline = entity as Polyline;
if (polyline == null)
{
return(false);
}
Bounding polylineBound = polyline.Bounding;
if (selectBound.Contains(polylineBound))
{
return(true);
}
Rectangle2 selRect = new Rectangle2(
new CADPoint(selectBound.left, selectBound.bottom),
new CADPoint(selectBound.right, selectBound.top));
Line2 rectLine1 = new Line2(selRect.leftBottom, selRect.leftTop);
Line2 rectLine2 = new Line2(selRect.leftTop, selRect.rightTop);
Line2 rectLine3 = new Line2(selRect.rightTop, selRect.rightBottom);
Line2 rectLine4 = new Line2(selRect.rightBottom, selRect.leftBottom);
for (int i = 1; i < polyline.NumberOfVertices; ++i)
{
CADPoint spnt = polyline.GetPointAt(i - 1);
CADPoint epnt = polyline.GetPointAt(i);
Line2 line2 = new Line2(spnt, epnt);
CADPoint intersection = new CADPoint();
if (Line2.Intersect(rectLine1, line2, ref intersection) ||
Line2.Intersect(rectLine2, line2, ref intersection) ||
Line2.Intersect(rectLine3, line2, ref intersection) ||
Line2.Intersect(rectLine4, line2, ref intersection))
{
return(true);
}
}
return(false);
}
internal override bool Cross(Bounding selectBound, Entity entity)
{
Line line = entity as Line;
if (line == null)
{
return(false);
}
Bounding lineBound = line.Bounding;
if (selectBound.Contains(lineBound))
{
return(true);
}
Rectangle2 selRect = new Rectangle2(
new CADPoint(selectBound.left, selectBound.bottom),
new CADPoint(selectBound.right, selectBound.top));
Line2 rectLine1 = new Line2(selRect.leftBottom, selRect.leftTop);
Line2 rectLine2 = new Line2(selRect.leftTop, selRect.rightTop);
Line2 rectLine3 = new Line2(selRect.rightTop, selRect.rightBottom);
Line2 rectLine4 = new Line2(selRect.rightBottom, selRect.leftBottom);
Line2 line2 = new Line2(line.startPoint, line.endPoint);
CADPoint intersection = new CADPoint();
if (Line2.Intersect(rectLine1, line2, ref intersection) ||
Line2.Intersect(rectLine2, line2, ref intersection) ||
Line2.Intersect(rectLine3, line2, ref intersection) ||
Line2.Intersect(rectLine4, line2, ref intersection))
{
return(true);
}
else
{
return(false);
}
}
internal virtual bool Window(Bounding bounding, Entity entity)
{
return(bounding.Contains(entity.bounding));
}
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);
}
}