public static double CalculateBulge(Point3d ptStart, Point3d corner, Point3d ptEnd)
{
Line line = new Line(ptStart, ptEnd);
Point3d center = new Point3d();
Circle cir = new Circle();
double p = (line.Length + ptStart.DistanceTo(corner) + ptEnd.DistanceTo(corner)) / 2;
double S = Math.Sqrt((p - line.Length) * (p - ptStart.DistanceTo(corner)) * (p - ptEnd.DistanceTo(corner)) * p);
cir.Radius = (line.Length * ptStart.DistanceTo(corner) * ptEnd.DistanceTo(corner)) / (4 * S);
//Find Center
// midle line
Point3d mid = new Point3d((ptEnd.X + ptStart.X) / 2, (ptEnd.Y + ptStart.Y) / 2, (ptEnd.Z + ptStart.Z) / 2);
Xline xline1 = new Xline();
xline1.BasePoint = mid;
xline1.UnitDir = (ptStart - ptEnd).GetPerpendicularVector();
Point3d mid2 = new Point3d((ptEnd.X + corner.X) / 2, (ptEnd.Y + corner.Y) / 2, (ptEnd.Z + corner.Z) / 2);
Xline xline2 = new Xline();
xline2.BasePoint = mid2;
xline2.UnitDir = (corner - ptEnd).GetPerpendicularVector();
Point3dCollection pts = new Point3dCollection();
xline2.IntersectWith(xline1, Intersect.ExtendArgument, pts, IntPtr.Zero, IntPtr.Zero);
if (pts.Count == 0)
{
return(0);
}
cir.Center = pts[0];
center = cir.Center;
Vector3d v1 = ptStart - cir.Center;
Vector3d v2 = corner - cir.Center;
double angle = v1.GetAngleTo(v2);
double bul = Math.Tan(angle / 4);
if (Clockwise(ptStart, corner, ptEnd))
{
bul = -1 * bul;
}
else
{
}
return(bul);
}
public static void CreateStairFrom3Point(Point3d pt1, Point3d pt2, Point3d pt3, double stairWidth, string Layer)
{
Line l12 = new Line(pt1, pt2);
Point3d ptonL12 = l12.GetClosestPointTo(pt3, false);
Xline xl1 = new Xline();
xl1.BasePoint = pt1;
xl1.UnitDir = pt3 - ptonL12;
Xline xl3 = new Xline();
xl3.BasePoint = pt3;
xl3.UnitDir = pt1 - pt2;
Point3dCollection pts3 = new Point3dCollection();
Point3dCollection pts4 = new Point3dCollection();
xl1.IntersectWith(xl3, Intersect.OnBothOperands, pts3, IntPtr.Zero, IntPtr.Zero);
Point3d p3 = new Point3d();
Point3d p4 = new Point3d();
if (pts3.Count > 0)
{
p3 = pts3[0];
}
else
{
return;
}
Xline xl2 = new Xline();
xl2.BasePoint = pt2;
xl2.UnitDir = pt3 - ptonL12;
xl2.IntersectWith(xl3, Intersect.OnBothOperands, pts4, IntPtr.Zero, IntPtr.Zero);
if (pts4.Count > 0)
{
p4 = pts4[0];
}
else
{
return;
}
Point3dCollection verx = new Point3dCollection();
verx.Add(pt1);
verx.Add(pt2);
verx.Add(p4);
verx.Add(p3);
Polyline3d pl = new Polyline3d(Poly3dType.SimplePoly, verx, true);
pl.Layer = Layer;
ArxHelper.AppendEntity(pl);
for (int i = 1; i < p4.DistanceTo(pt2) / stairWidth; i++)
{
Point3d p1 = pt1 + (p4 - pt2).GetNormal() * i * stairWidth;
Point3d p2 = pt2 + (p4 - pt2).GetNormal() * i * stairWidth;
Line line = new Line(p1, p2);
line.Layer = Layer;
ArxHelper.AppendEntity(line);
}
Point3d mid1 = new Point3d((pt1.X + pt2.X) / 2, (pt1.Y + pt2.Y) / 2, (pt1.Z + pt2.Z) / 2);
Point3d mid2 = new Point3d((p3.X + p4.X) / 2, (p3.Y + p4.Y) / 2, (p3.Z + p4.Z) / 2);
if (mid1.Z < mid2.Z)
{
drawArrow(mid1, mid2, pt1 - pt2, pt1.DistanceTo(pt2), stairWidth);
}
else
{
drawArrow(mid2, mid1, pt1 - pt2, pt1.DistanceTo(pt2), stairWidth);
}
}
public static bool BuilPolyline(Point3d pt1, Point3d pt2, Point3d closerPoint, Point3d CloserPointOnLine, Point3d FurtherPoint, Point3d FurthurPointOnLine)
{
//Build Longer line
Point3d pt7 = pt1 + (CloserPointOnLine - closerPoint).GetNormal() * 3;
Point3d pt8 = pt2 + (CloserPointOnLine - closerPoint).GetNormal() * 3;
Point3dCollection verx = new Point3dCollection();
verx.Add(pt7);
verx.Add(pt1);
verx.Add(pt2);
verx.Add(pt8);
Polyline3d longer = new Polyline3d(Poly3dType.SimplePoly, verx, false);
//Build Shorter Line
Xline xline = new Xline();
xline.BasePoint = closerPoint;
xline.UnitDir = pt1 - pt2;
Line l48 = new Line(FurthurPointOnLine, FurtherPoint);
Point3dCollection intersec = new Point3dCollection();
xline.IntersectWith(l48, Intersect.OnBothOperands, intersec, IntPtr.Zero, IntPtr.Zero);
if (intersec.Count < 1)
{
return(false);
}
Xline xl1 = new Xline();
if (pt1.DistanceTo(FurtherPoint) < pt2.DistanceTo(FurtherPoint))
{
xl1.BasePoint = pt1;
}
else
{
xl1.BasePoint = pt2;
}
xl1.UnitDir = pt7 - pt1;
Xline xl2 = new Xline();
xl2.BasePoint = FurtherPoint;
xl2.UnitDir = pt2 - pt1;
Point3dCollection intersec2 = new Point3dCollection();
xl1.IntersectWith(xl2, Intersect.OnBothOperands, intersec2, IntPtr.Zero, IntPtr.Zero);
Point3dCollection verx2 = new Point3dCollection();
if (intersec2.Count < 1)
{
return(false);
}
ArxHelper.AppendEntity(longer);
if (pt1.DistanceTo(FurtherPoint) < pt2.DistanceTo(FurtherPoint))
{
verx2.Add(pt1);
verx2.Add(intersec2[0]);
verx2.Add(FurtherPoint);
verx2.Add(intersec[0]);
verx2.Add(closerPoint);
verx2.Add(CloserPointOnLine);
Polyline3d pl = new Polyline3d(Poly3dType.SimplePoly, verx2, false);
ArxHelper.AppendEntity(pl);
return(true);
}
else
{
verx2.Add(pt2);
verx2.Add(intersec2[0]);
verx2.Add(FurtherPoint);
verx2.Add(intersec[0]);
verx2.Add(closerPoint);
verx2.Add(CloserPointOnLine);
Polyline3d pl = new Polyline3d(Poly3dType.SimplePoly, verx2, false);
ArxHelper.AppendEntity(pl);
return(true);
}
}
