topic Re: Using acedSSGet with :V selection mode in ObjectARX Forum

Using acedSSGet with :V selection mode

Anonymous — Wed, 19 Oct 2016 10:08:10 GMT

Hello,

I need to assign some XData values to a solid (box) face.

I try to use:

ads_name selSet;

acedSSGet( L"_:V", nullptr, nullptr, nullptr, selSet );

to let user specify the face. It seems to work fine, but how can I then get the face(s) selected ?

I tried:

ads_name entity;
acedSSName( selSet, 0, entity );

but it returns the entire solid...

Re: Using acedSSGet with :V selection mode

Alexander.Rivilis — Wed, 19 Oct 2016 16:26:04 GMT

You have to use not acedSSName but acedSSNameX. As an example you can see in the ObjectARX SDK: samples\entity\polysamp

hilit.cpp has the function hilitSolid which allow to highlight selected Face/Edge of AcDb3dSolid.

Re: Using acedSSGet with :V selection mode

Alexander.Rivilis — Wed, 19 Oct 2016 16:30:25 GMT

@Anonymous wrote:

...I need to assign some XData values to a solid (box) face....
but it returns the entire solid...

It is impossible to assign Xdata to AcDb3dSolid face, because XData can be assigned only to the whole object/entity

Face of AcDb3dSolid is not independent entity.

Re: Using acedSSGet with :V selection mode

Anonymous — Wed, 19 Oct 2016 17:59:55 GMT

I've tried this solution. The problem is that I want to use:

acedSSGet( L"_:V", NULL, NULL, NULL, sset )

and not the:

acedSSGet(NULL, NULL, NULL, NULL, sset)

Because in the first case user can see what he selects. The faces get highlighted when mouse hovers over them. In the latter case the entire solid is being selected.

And when I use the selection mode string the

pEnt->getSubentPathsAtGsMarker( AcDb::kFaceSubentType, marker, pickpnt, xform, numIds, subentIds );

returns different face, then the one I've selected.

By the way, it is very strange, that there is a new special selection mode and no sample code uses it...

Re: Using acedSSGet with :V selection mode

Anonymous — Wed, 19 Oct 2016 18:08:38 GMT

@Alexander.Rivilis wrote:
It is impossible to assign Xdata to AcDb3dSolid face, because XData can be assigned only to the whole object/entity
Face of AcDb3dSolid is not independent entity.

I expected this. AFAIK the face is not a DBRO. But I suppose I could assign to the solid the xdata containing face number along with the data which belongs to the face. I suppose there is some kind of consistent face numbering, to know for example which is the first face of the solid box, the second, etc.

Re: Using acedSSGet with :V selection mode

Alexander.Rivilis — Wed, 19 Oct 2016 22:49:04 GMT

Maybe this code will be a sample:

static void RivilisTestGetSubent() {
  ads_name ss;
  AcArray<SubentType> subTypes;   subTypes.append(kFaceSubentType);
  acedSSSetSubentTypes(subTypes);
  if (acedSSGet(_T("_:V"), nullptr, nullptr, nullptr, ss) == RTNORM)
  {
    Adesk::Int32 nEnts = 0, nSubs = 0;
    acedSSLength(ss, &nEnts);
    for (int i = 0; i < nEnts; i++) 
    {
      acedSSSubentLength(ss, i, &nSubs);
      for (int j = 0; j < nSubs; j++)
      {
        AcDbFullSubentPath path;
        acedSSSubentName(ss, i, j, path);
        AcDbObjectId id = path.objectIds()[0];
        AcDbObjectPointer<AcDb3dSolid> pSolid(id, AcDb::kForWrite);
        if (pSolid.openStatus() == Acad::eOk) {
          AcCmColor cm; cm.setColorIndex(1);
          pSolid->setSubentColor(path.subentId(), cm);
        } else {
          acutPrintf(_T("\nSelected entity is not solid!"));
          break;
        }
      }
    }
    acedSSFree(ss);
  }
}

Re: Using acedSSGet with :V selection mode

Anonymous — Thu, 20 Oct 2016 09:24:06 GMT

This is really a sample! Thanks a lot, Alex.

It would take me a long time to invent this solution.

One more question, if you be so kind:

As I mentioned earlier I need to know which face is it (geometrically). For this I would need the coords of the face vertices. For now, I found the not very elegant solution for this task. Namely:

AcDbEntity* pEnt = nullptr;
pSolid->copyFace( path.subentId( ), pEnt );
AcDbRegion* pFace = AcDbRegion::cast( pEnt );
AcGePlane regionPlane;
pFace->getPlane( regionPlane );

and having the plane I could identify, which face it was and get the coords of vertices from the solid. Any better idea, please ?

Re: Using acedSSGet with :V selection mode

Alexander.Rivilis — Thu, 20 Oct 2016 09:33:39 GMT

This way is look like easiest. Other way is use BREP API.