// This method helps to get correct "boundary box" for the regions which
// created through the splines. Written by Alexander Rivilis.
public static void GetVisualBoundary(this Db.Region region, double delta,
ref Gm.Point2d minPoint, ref Gm.Point2d maxPoint)
{
using (Gm.BoundBlock3d boundBlk = new Gm.BoundBlock3d())
{
using (Br.Brep brep = new Br.Brep(region))
{
foreach (Br.Edge edge in brep.Edges)
{
using (Gm.Curve3d curve = edge.Curve)
{
Gm.ExternalCurve3d curve3d = curve as Gm.ExternalCurve3d;
if (curve3d != null && curve3d.IsNurbCurve)
{
using (Gm.NurbCurve3d nurbCurve = curve3d.NativeCurve
as Gm.NurbCurve3d)
{
Gm.Interval interval = nurbCurve.GetInterval();
for (double par = interval.LowerBound; par <=
interval.UpperBound; par += (delta * 2.0))
{
Gm.Point3d p = nurbCurve.EvaluatePoint(par);
if (!boundBlk.IsBox)
{
boundBlk.Set(p, p);
}
else
{
boundBlk.Extend(p);
}
}
}
}
else
{
if (!boundBlk.IsBox)
{
boundBlk.Set(edge.BoundBlock.GetMinimumPoint(),
edge.BoundBlock.GetMaximumPoint());
}
else
{
boundBlk.Extend(edge.BoundBlock.GetMinimumPoint());
boundBlk.Extend(edge.BoundBlock.GetMaximumPoint());
}
}
}
}
}
boundBlk.Swell(delta);
minPoint = new Gm.Point2d(boundBlk.GetMinimumPoint().X,
boundBlk.GetMinimumPoint().Y);
maxPoint = new Gm.Point2d(boundBlk.GetMaximumPoint().X,
boundBlk.GetMaximumPoint().Y);
}
}
// Region extensions
///<summary>
/// Returns whether a Region contains a Point3d.
///</summary>
///<param name="pt">A points to test against the Region.</param>
///<returns>A Boolean indicating whether the Region contains
/// the point.</returns>
public static bool ContainsPoint(this _AcDb.Region reg, _AcGe.Point3d pt)
{
using (var brep = new _AcBr.Brep(reg))
{
var pc = new _AcBr.PointContainment();
using (var brepEnt = brep.GetPointContainment(pt, out pc))
{
return(pc != _AcBr.PointContainment.Outside);
}
}
}
///<summary>
/// Returns whether a Region contains a set of Point3ds.
///</summary>
///<param name="pts">An array of points to test against the Region.</param>
///<returns>A Boolean indicating whether the Region contains
/// all the points.</returns>
public static bool ContainsPoints(this _AcDb.Region reg, _AcGe.Point3d[] pts)
{
using (var brep = new _AcBr.Brep(reg))
{
foreach (var pt in pts)
{
var pc = new _AcBr.PointContainment();
using (var brepEnt = brep.GetPointContainment(pt, out pc))
{
if (pc == _AcBr.PointContainment.Outside)
{
return(false);
}
}
}
}
return(true);
}
