public void GetMirrorEnti()
{
BlockReference br = GetBlockCondition("请选择要镜像的块") as BlockReference;
if (br == null)
{
return;
}
Point3d ptPos = br.Position;
Point3d ptFirst = GetPoint("请选择镜像线的第一个点：\n");
Point3d ptSecond = GetPoint("请选择镜像线的第二个点：\n");
Line mLine = new Line(ptFirst, ptSecond);
Vector3d mVec = ptSecond - ptFirst;
double angle = Vector3d.YAxis.GetAngleTo(mVec);
var br2 = br.GetTransformedCopy(Matrix3d.Rotation(Math.PI + angle, Vector3d.ZAxis, ptPos)) as BlockReference;
br2.TransformBy(Matrix3d.Rotation(Math.PI, Vector3d.YAxis, br2.Position));
Vector3d mVecTri = mVec.RotateBy(Math.PI / 2, Vector3d.ZAxis);
Point3d pt1 = ptPos + mVecTri.GetNormal() * 10;
Point3d pt2 = mLine.GetClosestPointTo(ptPos, true);
Line line2 = new Line(ptPos, pt2);
Point3dCollection ptColl = new Point3dCollection();
line2.IntersectWith(mLine, Intersect.ExtendBoth, ptColl, IntPtr.Zero, IntPtr.Zero);
var vec = ptColl[0] - ptPos;
br2.TransformBy(Matrix3d.Displacement(vec));
mLine.ToSpace();
br2.ToSpace();
}