topic Joining Lines and Arcs into a Polyline? in ObjectARX Forum

Joining Lines and Arcs into a Polyline?

suparhigh12345 — Wed, 21 Feb 2024 17:11:40 GMT

Hello, In AutoCAD, the 'join' command can be used to connect multiple lines and arcs into a single polyline.

Is there a method or function available in the ObjectARX API that provides similar functionality, allowing us to achieve the same result programmatically?

Re: Joining Lines and Arcs into a Polyline?

Alexander.Rivilis — Wed, 21 Feb 2024 17:27:40 GMT

https://help.autodesk.com/view/OARX/2023/ENU/?guid=OARX-RefGuide-AcDbJoinEntityPE__joinEntities_AcDbEntity__AcArray_AcDbEntity____AcGeIntArray__AcGeTol__const

Re: Joining Lines and Arcs into a Polyline?

Alexander.Rivilis — Wed, 21 Feb 2024 19:07:59 GMT

Other sample:

//----------------------------------------------------------------------------- //----- acrxEntryPoint.cpp //----------------------------------------------------------------------------- #include "StdAfx.h" #include "resource.h" //----------------------------------------------------------------------------- #define szRDS _RXST("") //----------------------------------------------------------------------------- //----- ObjectARX EntryPoint class CJoinToPlineApp : public AcRxArxApp { public: CJoinToPlineApp () : 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 void JoinToPlineJoinToPline () { // filter for selectin lines and arcs ACHAR* promptPtrs[] = { _T("\nSelect lines and arcs for getting polyline (ENTER - exit): "), _T("\nRemove lines and arcs from selection set: ") }; ads_name ss; resbuf *rbFilter = acutBuildList(RTDXF0,_T("LINE,ARC"),RTNONE); int rc = acedSSGet(_T(":$"),promptPtrs,NULL,rbFilter,ss); acutRelRb(rbFilter); if (rc != RTNORM) return; AcDbObjectIdArray ids; if (ObjectIdArrayFromSelSet(ss, ids) != Acad::eOk) return; while (ids.length() > 0) { AcDbEntity *p = MakeJonedPoly(ids); if (p) { AcDbBlockTableRecordPointer pSpace(acdbCurDwg()->currentSpaceId(), AcDb::kForWrite); if (pSpace.openStatus() != Acad::eOk) return; pSpace->appendAcDbEntity(p); p->close(); } else { acutPrintf(_T("\nError in input data!")); return; } } } /// <summary> /// Getting AcDbObjectIdArray from SelectionSet /// </summary> /// <param name="sset">SelectionSet</param> /// <param name="ids">AcDbObjectIdArray</param> /// <returns></returns> static Acad::ErrorStatus ObjectIdArrayFromSelSet(ads_name sset, AcDbObjectIdArray &ids) { Acad::ErrorStatus es = Acad::eOk; long nset = -1; if (acedSSLength(sset,&nset) != RTNORM) return Acad::eAmbiguousInput; ids.setLogicalLength(nset); ads_name en; AcDbObjectId id; for (long i=0; i < nset; i++) { if (acedSSName(sset,i,en) == RTNORM) { if ((es = acdbGetObjectId(id,en)) != Acad::eOk) return es; ids[i] = id; } } return Acad::eOk; } /// <summary> /// Crete polyline from lines and arcs. /// </summary> /// <param name="ids">array of objectId</param> /// <param name="FUZZ"></param> /// <returns></returns> static AcDbPolyline* MakeJonedPoly( AcDbObjectIdArray &ids, double FUZZ = AcGeContext::gTol.equalPoint()) { AcDbPolyline *p = new AcDbPolyline(); p->setDatabaseDefaults(); AcDbObjectId idFirst = ids[0]; AcGePoint3d nextPt = AcGePoint3d::kOrigin; AcGePoint3d prevPt = AcGePoint3d::kOrigin; AcDbObjectPointer<AcDbCurve> c(idFirst,AcDb::kForRead); if (c.openStatus() == Acad::eOk) { AcGePoint3d ptStart, ptEnd; c->getStartPoint(ptStart); c->getEndPoint(ptEnd); p->addVertexAt(0, asPnt2d(asDblArray(ptStart)), BulgeFromArc(c, false), 0, 0); p->addVertexAt(1, asPnt2d(asDblArray(ptEnd)), 0, 0, 0); nextPt = ptEnd; prevPt = ptStart; } ids.remove(idFirst); int prevCnt = ids.length() + 1; while (ids.length() > 0 && ids.length() < prevCnt) { prevCnt = ids.length(); for (int i = 0; i < ids.length(); i++) { AcDbObjectId id = ids[i]; AcDbObjectPointer<AcDbCurve> cv(id,AcDb::kForRead); if (cv.openStatus() == Acad::eOk) { AcGePoint3d ptStart, ptEnd; cv->getStartPoint(ptStart); cv->getEndPoint(ptEnd); if (ptStart.distanceTo(nextPt) < FUZZ || ptEnd.distanceTo(nextPt) < FUZZ) { double bulge = BulgeFromArc(cv, ptEnd.distanceTo(nextPt) < FUZZ); p->setBulgeAt(p->numVerts() - 1, bulge); if (ptStart.distanceTo(nextPt) < FUZZ) nextPt = ptEnd; else nextPt = ptStart; p->addVertexAt(p->numVerts(), asPnt2d(asDblArray(nextPt)), 0, 0, 0); ids.remove(id); break; } else if (ptStart.distanceTo(prevPt) < FUZZ || ptEnd.distanceTo(prevPt) < FUZZ) { double bulge = BulgeFromArc(cv, ptStart.distanceTo(prevPt) < FUZZ); if (ptStart.distanceTo(prevPt) < FUZZ) prevPt = ptEnd; else prevPt = ptStart; p->addVertexAt(0, asPnt2d(asDblArray(prevPt)), bulge, 0, 0); ids.remove(id); break; } } } } if (p->numVerts() == 0) { delete p; return NULL; } else { return p; } } /// <summary> /// Getting bulge for curve /// </summary> /// <param name="c">curve pointer</param> /// <param name="clockwise">clockwise or counterclockwise.</param> /// <returns></returns> static double BulgeFromArc(AcDbCurve *c, bool clockwise) { double bulge = 0.0; AcDbArc *a = AcDbArc::cast(c); if (a == NULL) return bulge; double newStart = (a->startAngle() > a->endAngle()) ? (a->startAngle() - 8 * atan(1.0)) : (a->startAngle()); bulge = tan((a->endAngle() - newStart) / 4.0); if (clockwise) bulge = -bulge; return bulge; } } ; //----------------------------------------------------------------------------- IMPLEMENT_ARX_ENTRYPOINT(CJoinToPlineApp) ACED_ARXCOMMAND_ENTRY_AUTO(CJoinToPlineApp, JoinToPline, JoinToPline, JoinToPline, ACRX_CMD_MODAL, NULL)

Re: Joining Lines and Arcs into a Polyline?

Alexander.Rivilis — Fri, 23 Feb 2024 15:55:04 GMT

Sample with using AcDbJoinEntityPE::joinEntities method:

//----------------------------------------------------------------------------- //----- acrxEntryPoint.cpp //----------------------------------------------------------------------------- #include "StdAfx.h" #include "resource.h" #include "dbJoinEntityPE.h" //----------------------------------------------------------------------------- #define szRDS _RXST("") //----------------------------------------------------------------------------- //----- ObjectARX EntryPoint class CJoinEntitiesApp : public AcRxArxApp { public: CJoinEntitiesApp() : 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 void RivilisJoinEnts() { // filter for selectin lines and arcs ACHAR* promptPtrs[] = { _T("\nSelect lines, arcs, polylines for getting polyline (ENTER - exit): "), _T("\nRemove lines, arcs, polylines from selection set: ") }; ads_name ss; resbuf* rbFilter = acutBuildList(RTDXF0, _T("LINE,ARC,LWPOLYLINE"), RTNONE); int rc = acedSSGet(_T(":$"), promptPtrs, NULL, rbFilter, ss); acutRelRb(rbFilter); if (rc != RTNORM) return; AcDbObjectIdArray ids; if (ObjectIdArrayFromSelSet(ss, ids) != Acad::eOk) return; bool bContinue = true; while (bContinue) { bContinue = false; AcDbPolyline* pPoly = JoinToPolyline(ids); if (pPoly) { AcDbBlockTableRecordPointer pSpace(acdbCurDwg()->currentSpaceId(), AcDb::kForWrite); if (pSpace.openStatus() != Acad::eOk) return; pSpace->appendAcDbEntity(pPoly); pPoly->close(); pSpace->close(); for (int i = ids.length() - 1; i >= 0; i--) { if (ids[i].isNull()) { bContinue = true; ids.removeAt(i); } } } } } static AcDbPolyline* JoinToPolyline(AcDbObjectIdArray &ids) { AcGeIntArray aInts; AcDbPolyline *pPoly = new AcDbPolyline(); pPoly->setDatabaseDefaults(); AcArray<AcDbEntity*> ents; AcDbObjectPointer<AcDbCurve> c(ids[0], AcDb::kForWrite); if (c.openStatus() == Acad::eOk) { if (c->isKindOf(AcDbPolyline::desc())) { pPoly->copyFrom(c); c->erase(); } else { AcGePoint3d ptStart, ptEnd; c->getStartPoint(ptStart); c->getEndPoint(ptEnd); pPoly->addVertexAt(0, asPnt2d(asDblArray(ptStart)), BulgeFromArc(c, false), 0, 0); pPoly->addVertexAt(1, asPnt2d(asDblArray(ptEnd)), 0, 0, 0); c->erase(); } } for (int i = 1; i < ids.length(); i++) { AcDbObjectPointer<AcDbCurve> c(ids[i], AcDb::kForWrite); if (c.openStatus() == Acad::eOk) { AcDbCurve* cc = NULL; c.release(cc); ents.append(cc); } } if (ents.length() > 0) { AcDbJoinEntityPE* pPE = AcDbJoinEntityPE::cast(pPoly->queryX(AcDbJoinEntityPE::desc())); Acad::ErrorStatus es = pPE->joinEntities(pPoly, ents, aInts); if (es != Acad::eOk) { // acutPrintf(_T("\nError pPE->joinEntities(pPoly, ents, aInts) = %s"), acadErrorStatusText(es)); } else { for (int i = 0; i < aInts.length(); i++) { ents[aInts[i]]->erase(); ents[aInts[i]]->close(); ents[aInts[i]] = NULL; if (aInts[i] + 1 < ids.length()) ids[aInts[i]+1].setNull(); } } } for (int i = 0; i < ents.length(); i++) { if (ents[i] != NULL) { ents[i]->close(); } } ids[0].setNull(); return pPoly; } /// <summary> /// Getting AcDbObjectIdArray from SelectionSet /// </summary> /// <param name="sset">SelectionSet</param> /// <param name="ids">AcDbObjectIdArray</param> /// <returns></returns> static Acad::ErrorStatus ObjectIdArrayFromSelSet(ads_name sset, AcDbObjectIdArray& ids) { Acad::ErrorStatus es = Acad::eOk; Adesk::Int32 nset = -1; if (acedSSLength(sset, &nset) != RTNORM) return Acad::eAmbiguousInput; ids.setLogicalLength(nset); ads_name en; AcDbObjectId id; for (long i = 0; i < nset; i++) { if (acedSSName(sset, i, en) == RTNORM) { if ((es = acdbGetObjectId(id, en)) != Acad::eOk) return es; ids[i] = id; } } return Acad::eOk; } /// <summary> /// Getting bulge for curve /// </summary> /// <param name="c">curve pointer</param> /// <param name="clockwise">clockwise or counterclockwise.</param> /// <returns></returns> static double BulgeFromArc(AcDbCurve* c, bool clockwise) { double bulge = 0.0; AcDbArc* a = AcDbArc::cast(c); if (a == NULL) return bulge; double newStart = (a->startAngle() > a->endAngle()) ? (a->startAngle() - 8 * atan(1.0)) : (a->startAngle()); bulge = tan((a->endAngle() - newStart) / 4.0); if (clockwise) bulge = -bulge; return bulge; } }; //----------------------------------------------------------------------------- IMPLEMENT_ARX_ENTRYPOINT(CJoinEntitiesApp) ACED_ARXCOMMAND_ENTRY_AUTO(CJoinEntitiesApp, Rivilis, JoinEnts, JoinEnts, ACRX_CMD_MODAL | ACRX_CMD_USEPICKSET, NULL)

Update: Code fixed.