// Accepts the object ID of an AcDb2dPolyline, opens it, and gets
// a vertex iterator. It then iterates through the vertices,
// printing out the vertex location.
//
void
iterate(AcDbObjectId plineId)
{
AcDb2dPolyline *pPline;
acdbOpenObject(pPline, plineId, AcDb::kForRead);
AcDbObjectIterator *pVertIter= pPline->vertexIterator();
pPline->close(); // Finished with the pline header.
AcDb2dVertex *pVertex;
AcGePoint3d location;
AcDbObjectId vertexObjId;
for (int vertexNumber = 0; !pVertIter->done();
vertexNumber++, pVertIter->step())
{
vertexObjId = pVertIter->objectId();
acdbOpenObject(pVertex, vertexObjId,
AcDb::kForRead);
location = pVertex->position();
pVertex->close();
acutPrintf(_T("\nVertex #%d's location is")
_T(" : %0.3f, %0.3f, %0.3f"), vertexNumber,
location[X], location[Y], location[Z]);
}
delete pVertIter;
}
void
createPolyline()
{
// Set four vertex locations for the pline.
//
AcGePoint3dArray ptArr;
ptArr.setLogicalLength(4);
for (int i = 0; i < 4; i++) {
ptArr[i].set((double)(i/2), (double)(i%2), 0.0);
}
// Dynamically allocate an AcDb2dPolyline object,
// given four vertex elements whose locations are supplied
// in ptArr. The polyline has no elevation, and is
// explicitly set as closed. The polyline is simple;
// that is, not curve fit or a spline. By default, the
// widths are all 0.0 and there are no bulge factors.
//
AcDb2dPolyline *pNewPline = new AcDb2dPolyline(
AcDb::k2dSimplePoly, ptArr, 0.0, Adesk::kTrue);
pNewPline->setColorIndex(3);
// Get a pointer to a Block Table object.
//
AcDbBlockTable *pBlockTable;
acdbHostApplicationServices()->workingDatabase()
->getSymbolTable(pBlockTable, AcDb::kForRead);
// Get a pointer to the MODEL_SPACE BlockTableRecord.
//
AcDbBlockTableRecord *pBlockTableRecord;
pBlockTable->getAt(ACDB_MODEL_SPACE, pBlockTableRecord,
AcDb::kForWrite);
pBlockTable->close();
// Append the pline object to the database and
// obtain its Object ID.
//
AcDbObjectId plineObjId;
pBlockTableRecord->appendAcDbEntity(plineObjId,
pNewPline);
pBlockTableRecord->close();
// Make the pline object reside on layer "0".
//
pNewPline->setLayer("0");
pNewPline->close();
}
