public static DBObjectCollection IntersectSurf(Autodesk.AutoCAD.DatabaseServices.Surface surf1, Autodesk.AutoCAD.DatabaseServices.Surface surf2)
{
Brep surfBrep1 = new Brep(surf1);
Brep surfBrep2 = new Brep(surf2);
SurfaceSurfaceIntersector ssi = new SurfaceSurfaceIntersector();
DBObjectCollection dboCol = new DBObjectCollection();
foreach (Autodesk.AutoCAD.BoundaryRepresentation.Face fc1 in surfBrep1.Faces)
{
ExternalBoundedSurface[] ebSurfs1 = fc1.GetSurfaceAsTrimmedNurbs();
Autodesk.AutoCAD.Geometry.Surface sur1 = ebSurfs1[0];
foreach (Autodesk.AutoCAD.BoundaryRepresentation.Face fc2 in surfBrep2.Faces)
{
ExternalBoundedSurface[] ebSurfs2 = fc2.GetSurfaceAsTrimmedNurbs();
Autodesk.AutoCAD.Geometry.Surface sur2 = ebSurfs2[0];
ssi.Set(sur1, sur2);
if (ssi.NumResults < 1)
{
break;
}
for (int i = 0; i < ssi.NumResults; i++)
{
Curve3d c3d = ssi.IntersectCurve(i, true);
Curve crv = GenCurve(c3d);
crv.SetDatabaseDefaults();
crv.Color = Color.FromRgb(255, 255, 255);
dboCol.Add(crv);
////adding for now need instead to conver to single Spline
//BlockTableRecord btr = (BlockTableRecord)(trans.GetObject(db.CurrentSpaceId, OpenMode.ForWrite));
//btr.AppendEntity(crv);
//trans.AddNewlyCreatedDBObject(crv, true);
}
}
}
return(dboCol);
}
public void SurfInt()
{
Database db = HostApplicationServices.WorkingDatabase;
Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
ObjectId ObjID;
using (Transaction trans = db.TransactionManager.StartTransaction())
{
try
{
Autodesk.AutoCAD.DatabaseServices.Surface surf1;
Autodesk.AutoCAD.DatabaseServices.Surface surf2;
SurfGeomConstruct sgc1;
SurfGeomConstruct sgc2;
PromptEntityOptions peo = new PromptEntityOptions("Select first surface for intersection: ");
peo.SetRejectMessage("\nPlease select only a Surface");
peo.AddAllowedClass(typeof(Autodesk.AutoCAD.DatabaseServices.Surface), false);
PromptEntityResult per = ed.GetEntity(peo);
if (per.Status != PromptStatus.OK)
{
return;
}
ObjID = per.ObjectId;
surf1 = (Autodesk.AutoCAD.DatabaseServices.Surface)trans.GetObject(ObjID, OpenMode.ForRead, false);
surf1.Highlight();
peo.Message = "Select intersecting surface: ";
per = ed.GetEntity(peo);
if (per.Status != PromptStatus.OK)
{
return;
}
surf1.Unhighlight();
sgc1 = new SurfGeomConstruct(surf1);
ObjID = per.ObjectId;
surf2 = (Autodesk.AutoCAD.DatabaseServices.Surface)trans.GetObject(ObjID, OpenMode.ForRead, false);
sgc2 = new SurfGeomConstruct(surf2);
SurfaceSurfaceIntersector ssi = new SurfaceSurfaceIntersector();
//ssi.Set(sgc1.GeomSurf, sgc2.GeomSurf);
//int count = ssi.NumResults;
//if (count < 1) return;
BlockTableRecord btr = (BlockTableRecord)(trans.GetObject(db.CurrentSpaceId, OpenMode.ForWrite));
//for (int i = 0; i < count; i++)
//{
// Curve3d c3d = ssi.IntersectCurve(i, true);
// Curve crv = GenCurve(c3d);
// crv.SetDatabaseDefaults();
// btr.AppendEntity(crv);
// trans.AddNewlyCreatedDBObject(crv, true);
//}
Brep surfBrep1 = new Brep(surf1);
Brep surfBrep2 = new Brep(surf2);
foreach (Autodesk.AutoCAD.BoundaryRepresentation.Face fc1 in surfBrep1.Faces)
{
ExternalBoundedSurface[] ebSurfs1 = fc1.GetSurfaceAsTrimmedNurbs();
Autodesk.AutoCAD.Geometry.Surface sur1 = ebSurfs1[0];
foreach (Autodesk.AutoCAD.BoundaryRepresentation.Face fc2 in surfBrep2.Faces)
{
ExternalBoundedSurface[] ebSurfs2 = fc2.GetSurfaceAsTrimmedNurbs();
Autodesk.AutoCAD.Geometry.Surface sur2 = ebSurfs2[0];
ssi.Set(sur1, sur2);
if (ssi.NumResults < 1)
{
break;
}
for (int i = 0; i < ssi.NumResults; i++)
{
Curve3d c3d = ssi.IntersectCurve(i, true);
Curve crv = GenCurve(c3d);
crv.SetDatabaseDefaults();
btr.AppendEntity(crv);
trans.AddNewlyCreatedDBObject(crv, true);
}
}
}
if (ssi != null)
{
ssi.Dispose();
}
if (sgc1.GeomSurf != null)
{
sgc1.GeomSurf.Dispose();
}
if (sgc2.GeomSurf != null)
{
sgc2.GeomSurf.Dispose();
}
}
catch (System.Exception ex)
{
ed.WriteMessage("Error: " + ex.Message);
}
finally
{
trans.Commit();
}
}
}