topic 回复： How to create a Swept Solid using the objectARX AcDb3dSolid::createSweptSolid api? in ObjectARX Forum

How to create a Swept Solid using the objectARX AcDb3dSolid::createSweptSolid api?

it — Wed, 24 Aug 2022 08:46:48 GMT

Hello everyone,
Does anyone know how to create a Swept Solid using the objectARX AcDb3dSolid::createSweptSolid api? I've been looking for a long time and haven't found any usable examples, can anyone help?

Re: How to create a Swept Solid using the objectARX AcDb3dSolid::createSweptSolid api?

tbrammer — Wed, 25 May 2022 16:32:25 GMT

For example with the code below.

I have attached a DWG with a small triangle that can be used as "curve to sweep".

void cmdSweep() { ads_point pt; ads_name ent; AcDbObjectId objId, pathId; Acad::ErrorStatus es; if (acedEntSel(_T("\nSelect curve or region to sweep: "), ent, pt) != RTNORM) return; if (acdbGetObjectId(objId, ent) != Acad::eOk) //ads_name-->AcDbObjectId return; if (acedEntSel(_T("\nSelect sweep path: "), ent, pt) != RTNORM) return; if (acdbGetObjectId(pathId, ent) != Acad::eOk) //ads_name-->AcDbObjectId return; AcDbDatabase* pDB = objId.database(); AcDb3dSolid* solid = new AcDb3dSolid; AcDbEntity* pSweepEnt; AcDbCurve* path; if ((es = acdbOpenObject(path, pathId, AcDb::kForRead)) == Acad::eOk) { if ((es = acdbOpenObject(pSweepEnt, objId, AcDb::kForRead)) == Acad::eOk) { AcDbSweepOptions sweepOpts; sweepOpts.setAlignStart(true); sweepOpts.setMiterOption(AcDbSweepOptions::kDefaultMiter); solid->setDatabaseDefaults(pDB); es = solid->createSweptSolid(pSweepEnt, path, sweepOpts); if (!es) { es = postToDb(solid, pSweepEnt->database()); if (!es) solid->close(); else delete solid; } pSweepEnt->close(); } path->close(); } } Acad::ErrorStatus postToDb(AcDbEntity* ent, AcDbDatabase *pDB) { AcDbObjectId IdModelSpace = acdbSymUtil()->blockModelSpaceId(pDB); AcDbBlockTableRecord* model; Acad::ErrorStatus es; if ((es = acdbOpenObject(model, IdModelSpace, AcDb::kForWrite)) == Acad::eOk) { es = model->appendAcDbEntity(ent); model->close(); } return es; }

回复： How to create a Swept Solid using the objectARX AcDb3dSolid::createSweptSolid api?

it — Thu, 26 May 2022 06:38:19 GMT

Hi Thomas,
The sample code you provided solved my problem, thanks a lot.

Also, I need to continue my development, I have been looking in the forums, how to use objectARX to develop a function that does the same as the "FLATSHOT" command, it seems difficult to achieve.

I tried to use SendCommand to trigger the "FLATSHOT" command, but it always pops up the dialog, other than that, I didn't find any relevant information, do you have a better way?

回复： How to create a Swept Solid using the objectARX AcDb3dSolid::createSweptSolid api?

tbrammer — Thu, 26 May 2022 11:20:27 GMT

You might take a look at the "HLR API" (HLR=Hidden Line Removal): <ObjectARX>\utils\HlrApi. See the sample there.

For AcDb3dSolid, AcDbSurface, AcDbBody, and AcDbRegion entities you can also use AcDbSection : Create an AcDbSection object with a section plane parallel to the XY plane and above the scene you want to take a flatshot from. Use the method

Acad::ErrorStatus AcDbSection::generateSectionGeometry( const AcArray<AcDbEntity*>& entset, // input entities AcArray<AcDbEntity*>& intBoundaryEnts, // out AcArray<AcDbEntity*>& intFillEnts, // out AcArray<AcDbEntity*>& backgroundEnts, // out AcArray<AcDbEntity*>& foregroundEnts, // out AcArray<AcDbEntity*>& curveTangencyEnts // out ) const;

Re: How to create a Swept Solid using the objectARX AcDb3dSolid::createSweptSolid api?

infrabimtds — Thu, 11 Aug 2022 03:05:06 GMT

Hi Thomas,

I am new at objectarx. I tried using your code rebuild on vs2019 but no success.

Before that I have successfully created text and line . Thank.

VS2019 reports the following errors:

Re: How to create a Swept Solid using the objectARX AcDb3dSolid::createSweptSolid api?

tbrammer — Thu, 11 Aug 2022 07:03:48 GMT

Make sure that your project links to acgeoment.lib.

(Project settings->Linker->Input->Additional dependencies)

Re: How to create a Swept Solid using the objectARX AcDb3dSolid::createSweptSolid api?

tbrammer — Thu, 11 Aug 2022 07:25:57 GMT

Note: I used this tool to create the attached <libname>.h files for the <libname>.lib files in <ARX>\lib-x64.

Each <libname>.h file include the names all functions and symbols that <libname>.lib exports. So I can easily find out which ARX lib must be included to fix an unresolved external.

Re: How to create a Swept Solid using the objectARX AcDb3dSolid::createSweptSolid api?

infrabimtds — Thu, 11 Aug 2022 10:14:45 GMT

Thank you very much. I have solved the problem.