private bool SetFacesAndOffset(bool testOnly, object distanceFromHere, object distanceToHere)
{
if (distanceFromHere == null || distanceToHere == null)
{
return(true); // because this means, you can use the object
}
List <Face> fromHere = new List <Face>();
List <Face> toHere = new List <Face>();
Vertex vtx1 = distanceFromHere as Vertex;
Vertex vtx2 = distanceToHere as Vertex;
Edge edg1 = distanceFromHere as Edge;
Edge edg2 = distanceToHere as Edge;
Face fc1 = distanceFromHere as Face;
Face fc2 = distanceToHere as Face;
ICurve crv1 = distanceFromHere as ICurve;
ICurve crv2 = distanceToHere as ICurve;
originalOffset = GeoVector.NullVector;
if (distanceToHere is GeoObject.Point pnt && vtx2 == null)
{
vtx2 = new Vertex(pnt.Location);
}
if (vtx1 != null && vtx2 != null)
{
originalOffset = vtx1.Position - vtx2.Position;
}
else if ((vtx1 != null && edg2 != null) || (vtx2 != null && edg1 != null))
{
Vertex vtx;
Edge edg;
List <Face> lv, le;
if (vtx1 != null)
{
vtx = vtx1; edg = edg2; lv = fromHere; le = toHere;
}
else
{
vtx = vtx2; edg = edg1; lv = toHere; le = fromHere;
}
double cpos = edg.Curve3D.PositionOf(vtx.Position);
originalOffset = vtx.Position - edg.Curve3D.PointAt(cpos);
if (vtx1 == null)
{
originalOffset.Reverse();
}
}
else if ((vtx1 != null && fc2 != null) || (vtx2 != null && fc1 != null))
{
Vertex vtx;
Face fc;
List <Face> lv, le;
if (vtx1 != null)
{
vtx = vtx1; fc = fc2; lv = fromHere; le = toHere;
}
else
{
vtx = vtx2; fc = fc1; lv = toHere; le = fromHere;
}
GeoPoint2D[] pfs = fc.Surface.PerpendicularFoot(vtx.Position);
for (int i = 0; i < pfs.Length; i++)
{
if (fc.Contains(ref pfs[i], true))
{
originalOffset = vtx.Position - fc.Surface.PointAt(pfs[i]);
if (vtx1 == null)
{
originalOffset.Reverse();
}
break;
}
}
}
else if ((edg1 != null || crv1 != null) && (edg2 != null || crv2 != null))
{
double pos1 = 0.5, pos2 = 0.5;
if (crv1 == null)
{
crv1 = edg1.Curve3D;
}
if (crv2 == null)
{
crv2 = edg2.Curve3D;
}
if (crv1 is Line l1 && crv2 is Line l2)
{
if (Precision.SameDirection(l1.StartDirection, l2.StartDirection, false))
{
double u = crv1.PositionOf(crv2.StartPoint);
originalOffset = crv2.StartPoint - crv1.PointAt(u);
offsetStartPoint = crv1.PointAt(u);
}
else
{
Geometry.DistLL(l1.StartPoint, l1.StartDirection, l2.StartPoint, l2.StartDirection, out double par1, out double par2);
originalOffset = l2.PointAt(par2) - l1.PointAt(par1);
offsetStartPoint = l1.PointAt(par1);
}
}
else if (crv1.GetPlanarState() == PlanarState.Planar && crv2.GetPlanarState() == PlanarState.Planar)
{ // probably parallel planes, so newton could find anything
GeoPoint foot = crv1.GetPlane().ToLocal(crv2.StartPoint);
originalOffset = crv2.StartPoint - foot;
offsetStartPoint = foot;
}
else if (Curves.NewtonMinDist(crv1, ref pos1, crv2, ref pos2))
{
originalOffset = crv2.PointAt(pos2) - crv1.PointAt(pos1);
offsetStartPoint = crv1.PointAt(pos1);
}
// else no distance between two curves, maybe check some more cases, which make a usable offset
}
