topic Re: AcGeVoidPointerArray problem... in ObjectARX Forum

AcGeVoidPointerArray problem...

Anonymous — Fri, 30 Mar 2018 12:00:39 GMT

how to find ARC type entity or any type entity in AcGeVoidPointerArray...

example..

AcGeVoidPointerArray d;
d.setPhysicalLength(30);
aBloc->explode(d);
int g = d.length();

(aBloc is pointer of a BlockRefrence..)

please help..

Re: AcGeVoidPointerArray problem...

thierry_prince — Fri, 30 Mar 2018 14:36:12 GMT

Hi,

You should test each pointer stored in the array if it is the expected entity.

For example :

for (int i = 0; i < d.length(); i++)
{
  AcDbEntity* pEnt = (AcDbEntity*)d[i];
  if (pEnt == NULL)
    continue;
  if (pEnt->isKinkOf(AcDbArc::desc()))
  {
    // Do something...
  }
}

Cheers,

Thierry

Re: AcGeVoidPointerArray problem...

Anonymous — Sat, 31 Mar 2018 04:45:33 GMT

thank you Sir

Re: AcGeVoidPointerArray problem...

Anonymous — Sat, 31 Mar 2018 10:50:28 GMT

one more problem....

if AcGeVoidPointerArray has axis points..so how can access those points....

Re: AcGeVoidPointerArray problem...

7598165 — Sat, 31 Mar 2018 15:49:18 GMT

Use AcGePoint3dArray to store points instead of AcGeVoidPointerArray

AcGeVoidPointArray is used to store an array of AcGeEntity3d or AcGeEntity2d class objects

and

Are you sure that you use the AcGevoidPointerArray stored AcDbEntity ? Not AcDbVoidPointerArray?

Re: AcGeVoidPointerArray problem...

autodaug — Sun, 01 Apr 2018 20:21:48 GMT

There does seem to be some confusion here between the AcDb* and AcGe* namespaces. The two frameworks are different, but they use a lot of the same or similar names ("explode", "isKindOf", etc).

In the AcGe world, we have type AcGeVoidPointerArray, while in the AcDb world, we have AcDbVoidPtrArray. Both types are defined as AcArray<void *>, so they can be used interchangeably, but using the right identifier makes the code a little more readable.

AcGeCurve2d::explode() populates an AcGeVoidPointerArray, where each array entry actually points to an AcGeEntity2d. Likewise, AcGeCurve3d::explode() populates an array with ptrs to AcGeEntity3d's. AcDbEntity::explode(), otoh, gives you an AcDbVoidPtrArray containing pointers to AcDbEntity's.

The original question says that aBloc is a pointer to a BlockReference, so we must be talking about an AcDbBlockReference (since the AcGe* namespace doesn't have block references). Thus it is calling AcDbEntity::explode(), and the solution provided above is correct about using AcDbArc::isKindOf() etc to determine the type of AcDbEntity being pointed to.

Fwiw, the AcRx cast() method might be useful besides isKindOf(). E.g.:

AcDbArc *pArc = AcDbArc::cast(pEnt);
if (pArc != nullptr) {
   // do stuff with pArc
}
else if (AcDbLine *pLine = AcDbLine::cast(pEnt)) {
    // do stuff with pLine
}
etc

And about "axis points", I'm not sure what the question is. Can you clarify?

Re: AcGeVoidPointerArray problem...

Anonymous — Mon, 02 Apr 2018 07:16:14 GMT

i'll try to get points on "kExternal" type Hatch ... and i use getLoopAt method ....

In case Polyline Hatch its easy to get points ...here getLoopAt method is working fine for getting vertices..

what can i do for kExternal type Hatch..??

code::

AcGeVoidPointerArray edgepoint;
edgepoint.setPhysicalLength(30);
AcGeIntArray edgetype;
edgetype.setPhysicalLength(50);
Adesk::Int32 loopType;

aHac->getLoopAt(ind, loopType, edgepoint, edgetype);

acutPrintf(_T("\n%d"), edgepoint.length());

where edgepoint.length gives....4

which is total no. of vertices in hatch..

how can i get the x,y,z values of that vertices??

pls help...

Re: AcGeVoidPointerArray problem...

7598165 — Mon, 02 Apr 2018 07:49:57 GMT

not points, you get 4 AcGeCurve2d-type curves,

indicating that the LOOP boundary you took is not a polyline but consists of four curves.

for (int i=0;i<EdgePoint.length();i++)
{
	AcGeCurve2d *pGe = (AcGeCurve2d *)EdgePoint[i];

	acutPrintf(_T("\nGe Curve Type=%d"), (int)pGe->type());

	if (pGe->type() == AcGe::kLineSeg2d)
	{
	}
	else if (pGe->type() == AcGe::kCircArc2d)
	{

	}
	else if (pGe->type() == AcGe::kEllipArc2d)
	{

	}
	else if (pGe->type() == AcGe::kNurbCurve2d)
	{

	}else if (pGe->type() == AcGe::kCompositeCrv2d)
	{
	}
	else {
        ....
	}

}