沿三维路径扫掠轮廓（闭合的样条线）

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#include <aced.h>
#include "rxregsvc.h"
#include "acutads.h"
#include "dbapserv.h"
#include "dbsymtb.h"
#include "gepnt3d.h"
#include "dbsol3d.h"
#include "dbents.h"
#include "dbregion.h"


static Acad::ErrorStatus postToDb(AcDbEntity* ent, AcDbObjectId& objId) {
   Acad::ErrorStatus      es;
   AcDbBlockTable*        pBlockTable;
   AcDbBlockTableRecord*  pSpaceRecord;
   if ((es = acdbHostApplicationServices()->workingDatabase()->
      getSymbolTable(pBlockTable, AcDb::kForRead))
      != Acad::eOk) {
         return es;
      }
   if ((es = pBlockTable->getAt(ACDB_MODEL_SPACE,  
      pSpaceRecord,
      AcDb::kForWrite)) != Acad::eOk) {
         return es;
      }
   if ((es = pBlockTable->close()) != Acad::eOk) {
      return es;
      }
   if ((es = pSpaceRecord->appendAcDbEntity(objId, ent)) != Acad::eOk) {
      return es;
      }
   if ((es = pSpaceRecord->close()) != Acad::eOk) {
      return es;
      }
   return ent->close();
   }


bool LOCAL_createSweepedSolidAcad() {
   AcDb2dPolyline *pPolyProf = new AcDb2dPolyline();
   AcDb2dVertex *vp1 = new AcDb2dVertex( AcGePoint3d(  0, 0, 0 ) );  pPolyProf->appendVertex( vp1 );
   AcDb2dVertex *vp2 = new AcDb2dVertex( AcGePoint3d(  1, 1, 0 ) );  pPolyProf->appendVertex( vp2 );
   AcDb2dVertex *vp3 = new AcDb2dVertex( AcGePoint3d(  0, 5, 0 ) );  pPolyProf->appendVertex( vp3 );
   AcDb2dVertex *vp4 = new AcDb2dVertex( AcGePoint3d( -1, 1, 0 ) );  pPolyProf->appendVertex( vp4 );
   pPolyProf->makeClosed();

   AcDb3dPolyline *pPolyPath1 = new AcDb3dPolyline();
   AcDb3dPolylineVertex *v1a = new AcDb3dPolylineVertex( AcGePoint3d( 10,10,10 ) );  pPolyPath1->appendVertex( v1a );
   AcDb3dPolylineVertex *v1b = new AcDb3dPolylineVertex( AcGePoint3d( 20,20,12 ) );  pPolyPath1->appendVertex( v1b );

   AcDb3dPolyline *pPolyPath2 = new AcDb3dPolyline();
   AcDb3dPolylineVertex *v2a = new AcDb3dPolylineVertex( AcGePoint3d( -10,-10,10 ) );  pPolyPath2->appendVertex( v2a );
   AcDb3dPolylineVertex *v2b = new AcDb3dPolylineVertex( AcGePoint3d( -20,-20,12 ) );  pPolyPath2->appendVertex( v2b );

   AcDbSweepOptions sweepOptions;
   sweepOptions.setAlign( AcDbSweepOptions::kAlignSweepEntityToPath );
   sweepOptions.setBasePoint( AcGePoint3d(0,0,0) );
   
   AcDb3dSolid* cad3dSolid1 = new AcDb3dSolid();
   Acad::ErrorStatus es1 = cad3dSolid1->createSweptSolid( pPolyProf, pPolyPath1, sweepOptions );
   cad3dSolid1->setColorIndex(2);  
   AcDbObjectId idSolid1;
   postToDb( cad3dSolid1, idSolid1 );

   AcDb3dSolid* cad3dSolid2 = new AcDb3dSolid();
   Acad::ErrorStatus es2 = cad3dSolid2->createSweptSolid( pPolyProf, pPolyPath2, sweepOptions );
   cad3dSolid2->setColorIndex(2);  
   AcDbObjectId idSolid2;
   postToDb( cad3dSolid2, idSolid2 );

   delete pPolyPath1;
   delete pPolyPath2;
   delete pPolyProf;
   return es1 == Acad::eOk && es2 == Acad::eOk;
   }


//******************************************************************************
/// purpose: define new cad-command
void runIt()
{
acutPrintf(L"\nTest-Command");
LOCAL_createSweepedSolidAcad();
}


//******************************************************************************
/// purpose: main function
extern "C" AcRx::AppRetCode acrxEntryPoint(AcRx::AppMsgCode msg, void* appId)
{
switch(msg) {
   case AcRx::kInitAppMsg:
      acrxUnlockApplication(appId);
      acrxRegisterAppMDIAware(appId);
      acutPrintf(L"\nExample Application Loaded");
      acedRegCmds->addCommand(L"ASDK_MAKE_ENTS", L"ASDK_MKENTS", L"RUNIT", ACRX_CMD_MODAL, runIt);
      break;
   case AcRx::kUnloadAppMsg:
      acutPrintf(L"\nExample Application Unloaded");
      break;
   }
return AcRx::kRetOK;
}