ObjectARX中三維多段線轉二維多段線的方法
阿新 • • 發佈：2018-04-27
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Acad::ErrorStatus
AcDb3dPolylineToAcDb2dPolyline(AcDbObjectId objId, int flag /* =0 */)
{
Acad::ErrorStatus es;
AcDbEntity *pEnt = NULL;
double elev = 0.0;
es = acdbOpenObject(pEnt, objId, AcDb::kForWrite);
int i = 0;
if (pEnt->isKindOf(AcDb3dPolyline::desc()))
{
AcDb2dPolyline *pNewline = new AcDb2dPolyline();
AcDb3dPolyline *pPline = AcDb3dPolyline::cast(pEnt);
AcDbObjectIterator *pItr = pPline->vertexIterator();
for (pItr->start(); !pItr->done(); pItr->step())
{
AcDb3dPolylineVertex *pVertex = NULL;
AcDbObjectId vId = pItr->objectId();
acdbOpenObject(pVertex, vId, AcDb::kForRead);
AcDb::Vertex3dType verType = pVertex->vertexType();
if (verType != AcDb::k3dControlVertex)
{
i++;
AcDb2dVertex *p2dVertex = new AcDb2dVertex(pVertex->position());
p2dVertex->setXData(pVertex->xData());
pNewline->appendVertex(p2dVertex);
p2dVertex->close();
}
if (flag == 1)
{
elev += pVertex->position().z;
}
pVertex->close();
}
delete pItr;
pItr = 0;
double eleva = elev / i;
pNewline->setElevation(eleva);
pNewline->setPropertiesFrom(pPline);
if (pPline->isClosed())
{
pNewline->makeClosed();
}
pNewline->setXData(pPline->xData());
m_DbUtil.PostToModelSpace(pNewline);
pPline->erase();
}
pEnt->close();
return es;
}
ObjectARX中三維多段線轉二維多段線的方法