bug of intersectWith()

[syx_lemans]

I used these methods above to check entities' intersection

AcDbEntity* selectEntity(const ACHAR* prompt,
                         AcDbObjectId& id,
                         AcGePoint3d& pick,
                         AcDb::OpenMode openMode )
{
    AcDbEntity* ent = NULL;
    ads_name ename;
    
    if(acedEntSel(prompt, ename, asDblArray(pick) ) == RTNORM)
    {
        if(acdbGetObjectId(id,ename)==Acad::eOk)
            {
            if(acdbOpenAcDbEntity(ent,id,openMode)==Acad::eOk)
                return ent;
            }
    }
    return ent;
}

void Test()
{
    // TODO: Implement the command
    AcDbEntity* pEnt1;
    AcDbEntity* pEnt2;
    AcGePoint3d pick;
    AcDbObjectId id;
    Acad::ErrorStatus es;
    AcGePoint3dArray is;
    
    if((pEnt1 = selectEntity(_T("\nSelect 1st entity : "),
                             id,pick,AcDb::kForRead))== NULL)
    {
        acutPrintf(L"\nSelection failed");
        return;
    }
    
    if((pEnt2 = selectEntity(_T("\nSelect 2nd entity : "),
                             id,pick,AcDb::kForRead))== NULL)
    {
        acutPrintf(_T("\nSelection failed"));
        pEnt1->close();
        return;
    }
    
    es = pEnt1->intersectWith(pEnt2,AcDb::kOnBothOperands,is);
    
    if(es != Acad::eOk)
    {
        acutPrintf(_T("\nIntersectWith failed : es = %s"),
                   acadErrorStatusText(es));
    }
    else
    {
        acutPrintf(_T("\nGot %d intersections"),is.length());
        for(int i= 0;i<is.length();i++)
            {
            acutPrintf(_T("\nIntersection[%d] :(%.3lf,%.3lf,%3.lf)"),
                       i,is[i].x,is[i].y,is[i].z);
            }
    }
    pEnt1->close();
    pEnt2->close();
}

When I selection two entities with no intersection, it works well. However, when I take two entities with intersection, it crashes. It's apparently a issue from the intersectWith method., but I don't know why.

[Alexander.Rivilis · Accepted solution]

I can not reproduce your issue.

Code:

//-----------------------------------------------------------------------------
//----- acrxEntryPoint.cpp
//-----------------------------------------------------------------------------
#include "StdAfx.h"
#include "resource.h"

//-----------------------------------------------------------------------------
#define szRDS _RXST("")

//-----------------------------------------------------------------------------
//----- ObjectARX EntryPoint
class CTestIntersectApp : public AcRxArxApp {

public:
	CTestIntersectApp () : AcRxArxApp () {}

	virtual AcRx::AppRetCode On_kInitAppMsg (void *pkt) {
		AcRx::AppRetCode retCode = AcRxArxApp::On_kInitAppMsg (pkt) ;
		return (retCode) ;
	}

	virtual AcRx::AppRetCode On_kUnloadAppMsg (void *pkt) {
		AcRx::AppRetCode retCode = AcRxArxApp::On_kUnloadAppMsg (pkt) ;
		return (retCode) ;
	}

	virtual void RegisterServerComponents () {	}

  static AcDbEntity* selectEntity(const ACHAR* prompt,
    AcDbObjectId& id,
    AcGePoint3d& pick,
    AcDb::OpenMode openMode)
  {
    AcDbEntity* ent = NULL;
    ads_name ename;

    if (acedEntSel(prompt, ename, asDblArray(pick)) == RTNORM)
    {
      if (acdbGetObjectId(id, ename) == Acad::eOk)
      {
        if (acdbOpenAcDbEntity(ent, id, openMode) == Acad::eOk)
          return ent;
      }
    }
    return ent;
  }

	static void MyGroupMyCommand () {
    AcDbEntity* pEnt1;
    AcDbEntity* pEnt2;
    AcGePoint3d pick;
    AcDbObjectId id;
    Acad::ErrorStatus es;
    AcGePoint3dArray is;

    if ((pEnt1 = selectEntity(_T("\nSelect 1st entity : "),
      id, pick, AcDb::kForRead)) == NULL)
    {
      acutPrintf(L"\nSelection failed");
      return;
    }

    if ((pEnt2 = selectEntity(_T("\nSelect 2nd entity : "),
      id, pick, AcDb::kForRead)) == NULL)
    {
      acutPrintf(_T("\nSelection failed"));
      pEnt1->close();
      return;
    }

    es = pEnt1->intersectWith(pEnt2, AcDb::kOnBothOperands, is);

    if (es != Acad::eOk)
    {
      acutPrintf(_T("\nIntersectWith failed : es = %s"),
        acadErrorStatusText(es));
    }
    else
    {
      acutPrintf(_T("\nGot %d intersections"), is.length());
      for (int i = 0;i < is.length();i++)
      {
        acutPrintf(_T("\nIntersection[%d]: (%.3lf,%.3lf,%3.lf)"),
          i, is[i].x, is[i].y, is[i].z);
      }
    }
    pEnt1->close();
    pEnt2->close();
	}

	
} ;

//-----------------------------------------------------------------------------
IMPLEMENT_ARX_ENTRYPOINT(CTestIntersectApp)

ACED_ARXCOMMAND_ENTRY_AUTO(CTestIntersectApp, MyGroup, MyCommand, MyCommandLocal, ACRX_CMD_MODAL, NULL)

Video:

1. What AutoCAD version you using? Have you all updates installed?

2. What ObjectARX SDK version you using?

3. What Visual Studio version you using?

[syx_lemans]

Thank you for your reply.

I am using objectarx2011 and AutoCAD 2011. Perhaps it's too old.

When I ran the code, I got an issue:

acrxEntryPoint.cpp(71): error C2248: 'AcDbEntity::subIntersectWith' : cannot access protected member declared in class 'AcDbEntity'

And I found this in "sdk_map_names.h":

So I comment this line. Then it's compiled successfully.

But it crashed when I picked two intersecting lines

[Alexander.Rivilis]

---

@syx_lemans wrote:

Thank you for your reply.

I am using objectarx2011 and AutoCAD 2011. Perhaps it's too old.

---

I can not check with AutoCAD 2011 but can recommend install all updates and check again:

https://knowledge.autodesk.com/support/autocad/downloads?release=2011

[tbrammer · Accepted solution]

---

@syx_lemans wrote:

I am using objectarx2011 and AutoCAD 2011.

When I ran the code, I got an issue:

acrxEntryPoint.cpp(71): error C2248: 'AcDbEntity::subIntersectWith' : cannot access protected member declared in class 'AcDbEntity'

And I found this in "sdk_map_names.h":

So I comment this line. Then it's compiled successfully.

But it crashed when I picked two intersecting lines

---

I suppose you implemented your own custom entity class. I also suppose you have ported your project from a pre-ARX2010 version.

Starting with ARX 2010 many of the virtual AcDbEntity methods (like subIntersectWith()) became  sealed  (ADESK_SEALED), which means that they can not be overridden. DBX modules must instead override the sub*() methods (like subIntersectWith()) in custom entity classes.

On the other hand your ARX application still must call pEnt->intersectWith() - not  pEnt->subIntersectWith()!

I still have the ARX2010 SDK on my machine and searched for sdk_map_names.h. I don't have this header. Have you created it yourself?

Make sure that you use it's #defines in your DBX / custom entity code only - not in your ARX command implementation.

[syx_lemans]

I updated my AutoCAD, but nothing changed.

[video]

The same code works for bricsCAD. I don't quite understand

[syx_lemans]

I don't develop a lot for CAD. So I just pick the sample code and change something.

This may cause my problem.

When I comment the line of "subIntersectwith"

My program can be successfully compiled. But it got a fatal error when I use it for two intersecting entities. I didn't override this function.

[Alexander.Rivilis]

1. Install ObjectARX Wizard 2011

2. Create new project with help of ObjectARX Wizard

3. Change content of acrxEntryPoint.cpp with my code

4. Compile and link this project with Visual Studio 2008 SP1

5. Check again

[Alexander.Rivilis]

I've checked code with AutoCAD 2012, VS 2008 SP1 and ObjectARX SDK 2010. No errors: http://autode.sk/2nh5iqG

[syx_lemans]

It's a problem with my AutoCAD. It works with other version.

There is no problem with the code.

Thank you so much for your replies

[syx_lemans]

I didn't succeed to install objectarx wizard for vs2008 sp1. I got an issue " there is a problem with this windows installer package ".

Could I send my code to you to compile it and send me the arx file?

[syx_lemans]

Sorry it's solved.

It's a User Account Control problem